287 files changed, 3678 insertions, 2922 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8ae1e9b45..9d9cb1f60 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,6 +3,7 @@
 project(Subsurface)
 cmake_minimum_required(VERSION 2.8.11)
 
+
 # global settings
 
 set(CMAKE_AUTOMOC ON)
@@ -11,8 +12,8 @@ option(LIBGIT2_FROM_PKGCONFIG "use pkg-config to retrieve libgit2" OFF)
 option(LIBDC_FROM_PKGCONFIG "use pkg-config to retrieve libdivecomputer" OFF)
 option(LIBGRANTLEE_FROM_PKGCONFIG "use pkg-config to retrieve grantlee" OFF)
 option(LIBMARBLE_FROM_PKGCONFIG "use pkg-config to retrieve marble" OFF)
+option(MAKE_TESTS "Make the tests" ON)
 option(NO_MARBLE "disable the marble widget" OFF)
-option(NO_TESTS "disable the tests" OFF)
 option(NO_DOCS "disable the docs" OFF)
 option(NO_PRINTING "disable the printing support" OFF)
 option(NO_USERMANUAL "don't include a viewer for the user manual" OFF)
@@ -23,6 +24,12 @@ option(FBSUPPORT "allow posting to Facebook" ON)
 option(BTSUPPORT "enable support for QtBluetooth (requires Qt5.4 or newer)" ON)
 option(FTDISUPPORT "enable support for libftdi based serial" OFF)
 
+add_definitions(-DSUBSURFACE_SOURCE="${CMAKE_SOURCE_DIR}")
+
+if(BTSUPPORT)
+	add_definitions(-DBT_SUPPORT)
+endif()
+
 set(CMAKE_MODULE_PATH
 	${CMAKE_MODULE_PATH}
 	${${PROJECT_NAME}_SOURCE_DIR}/cmake/Modules
@@ -31,9 +38,11 @@ set(CMAKE_MODULE_PATH
 include_directories(.
 	${CMAKE_CURRENT_BINARY_DIR}
 	${CMAKE_BINARY_DIR}
-	qt-ui
+	${CMAKE_BINARY_DIR}/desktop-widgets
+	desktop-widgets/
 	qt-models
-	qt-ui/profile
+	desktop-widgets/profile
+	subsurface-core/
 )
 
 # get the version string -- this is only used for Mac Bundle at this point
@@ -47,9 +56,19 @@ execute_process(
 
 message(STATUS "Creating build files for Subsurface ${SSRF_VERSION_STRING}")
 
-# compiler specific settings
-if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUXX)
-	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu99 ")
+if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
+	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu11 ")
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
+elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "AppleClang")
+	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu11 ")
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
+elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu11")
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
+elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel")
+  # using Intel C++
+elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
+  # using Visual Studio C++
 endif()
 
 # pkgconfig for required libraries
@@ -136,7 +155,6 @@ if(FTDISUPPORT)
 	if (NOT LIBFTDI_FOUND)
 		pkg_config_library(LIBFTDI libftdi1 REQUIRED)
 	endif()
-	set(SERIAL_FTDI serial_ftdi.c)
 	add_definitions(-DSERIAL_FTDI)
 endif()
 
@@ -159,13 +177,6 @@ else()
 		find_package(Grantlee5 REQUIRED)
 		set(GRANTLEE_LIBRARIES Grantlee5::Templates)
 	endif()
-	set(SUBSURFACE_PRINTING_SRCS
-		printer.cpp
-		templatelayout.cpp
-		qt-ui/templateedit.cpp
-		qt-ui/printdialog.cpp
-		qt-ui/printoptions.cpp
-	)
 	set(PRINTING_PKG PrintSupport)
 	set(PRINTING_LIB Qt5::PrintSupport)
 endif()
@@ -174,7 +185,6 @@ if(NO_USERMANUAL)
 	message(STATUS "building without usermanual")
 	add_definitions(-DNO_USERMANUAL)
 else()
-	set(USERMANUAL qt-ui/usermanual.cpp)
 	set(WEBKIT_PKG WebKitWidgets)
 	set(WEBKIT_LIB Qt5::WebKitWidgets)
 endif()
@@ -273,22 +283,18 @@ add_custom_target(
 )
 
 # set up the different target platforms
-set(PLATFORM_SRC unknown_platform.c)
 if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
 	set(SUBSURFACE_TARGET subsurface)
-	set(PLATFORM_SRC linux.c)
 	# in some builds we appear to be missing libz for some strange reason...
 	set(SUBSURFACE_LINK_LIBRARIES ${SUBSURFACE_LINK_LIBRARIES} -lz)
 endif()
 if(ANDROID)
-	set(PLATFORM_SRC android.cpp)
 	set(SUBSURFACE_TARGET subsurface)
 	# To allow us to debug log to logcat
 	set(SUBSURFACE_LINK_LIBRARIES ${SUBSURFACE_LINK_LIBRARIES} -llog)
 endif()
 if(CMAKE_SYSTEM_NAME STREQUAL "Darwin")
 	set(SUBSURFACE_TARGET Subsurface)
-	set(PLATFORM_SRC macos.c)
 	find_library(APP_SERVICES_LIBRARY ApplicationServices)
 	find_library(HID_LIB HidApi)
 	set(SUBSURFACE_LINK_LIBRARIES ${SUBSURFACE_LINK_LIBRARIES} ${HID_LIB})
@@ -307,200 +313,35 @@ if(CMAKE_SYSTEM_NAME STREQUAL "Darwin")
 endif()
 if(CMAKE_SYSTEM_NAME STREQUAL "Windows")
 	set(SUBSURFACE_TARGET subsurface)
-	set(PLATFORM_SRC windows.c)
 	set(SUBSURFACE_LINK_LIBRARIES ${SUBSURFACE_LINK_LIBRARIES} -lwsock32 -lws2_32)
 	remove_definitions(-DUNICODE)
 	add_definitions(-mwindows -D_WIN32)
 endif()
 
+qt5_add_resources(SUBSURFACE_RESOURCES subsurface.qrc)
+
 # include translations
 add_subdirectory(translations)
-
-if(BTSUPPORT)
-	add_definitions(-DBT_SUPPORT)
-	set(BT_SRC_FILES qt-ui/btdeviceselectiondialog.cpp)
-	set(BT_CORE_SRC_FILES qtserialbluetooth.cpp)
-endif()
-
-# compile the core library, in C.
-set(SUBSURFACE_CORE_LIB_SRCS
-	cochran.c
-	datatrak.c
-	deco.c
-	device.c
-	dive.c
-	divesite.c
-	divesite.cpp # some new stuff that is not c code but belongs to divesite.
-	divelist.c
-	equipment.c
-	file.c
-	git-access.c
-	libdivecomputer.c
-	liquivision.c
-	load-git.c
-	membuffer.c
-	ostctools.c
-	parse-xml.c
-	planner.c
-	profile.c
-	gaspressures.c
-	worldmap-save.c
-	save-git.c
-	save-xml.c
-	save-html.c
-	sha1.c
-	statistics.c
-	strtod.c
-	subsurfacestartup.c
-	time.c
-	uemis.c
-	uemis-downloader.c
-	version.c
-	# gettextfrommoc should be added because we are using it on the c-code.
-	gettextfromc.cpp
-	# dirk ported some core functionality to c++.
-	qthelper.cpp
-	divecomputer.cpp
-	exif.cpp
-	subsurfacesysinfo.cpp
-	devicedetails.cpp
-	configuredivecomputer.cpp
-	configuredivecomputerthreads.cpp
-	divesitehelpers.cpp
-	taxonomy.c
-	checkcloudconnection.cpp
-	windowtitleupdate.cpp
-	divelogexportlogic.cpp
-	qt-init.cpp
-	${BT_CORE_SRC_FILES}
-	${SERIAL_FTDI}
-	${PLATFORM_SRC}
-)
-source_group("Subsurface Core" FILES ${SUBSURFACE_CORE_LIB_SRCS})
+add_subdirectory(subsurface-core)
+add_subdirectory(qt-models)
+add_subdirectory(profile-widget)
+add_subdirectory(desktop-widgets)
 
 if(FBSUPPORT)
 	add_definitions(-DFBSUPPORT)
-	set(SOCIALNETWORKS qt-ui/socialnetworks.cpp)
-endif()
-
-# the data models that will interface
-# with the views.
-set(SUBSURFACE_MODELS_LIB_SRCS
-	qt-models/cleanertablemodel.cpp
-	qt-models/cylindermodel.cpp
-	qt-models/diveplannermodel.cpp
-	qt-models/models.cpp
-	qt-models/filtermodels.cpp
-	qt-models/tankinfomodel.cpp
-	qt-models/weigthsysteminfomodel.cpp
-	qt-models/weightmodel.cpp
-	qt-models/divecomputermodel.cpp
-	qt-models/treemodel.cpp
-	qt-models/tableprintmodel.cpp
-	qt-models/yearlystatisticsmodel.cpp
-	qt-models/divetripmodel.cpp
-	qt-models/divecomputerextradatamodel.cpp
-	qt-models/completionmodels.cpp
-	qt-models/profileprintmodel.cpp
-	qt-models/divepicturemodel.cpp
-	qt-models/diveplotdatamodel.cpp
-	qt-models/divelocationmodel.cpp
-	qt-models/divesitepicturesmodel.cpp
-	qt-models/ssrfsortfilterproxymodel.cpp
-)
-source_group("Subsurface Models" FILES ${SUBSURFACE_MODELS})
-
-# the interface, in C++
-set(SUBSURFACE_INTERFACE
-	qt-ui/updatemanager.cpp
-	qt-ui/about.cpp
-	qt-ui/divecomputermanagementdialog.cpp
-	qt-ui/divelistview.cpp
-	qt-ui/diveplanner.cpp
-	qt-ui/diveshareexportdialog.cpp
-	qt-ui/downloadfromdivecomputer.cpp
-	qt-ui/globe.cpp
-	qt-ui/graphicsview-common.cpp
-	qt-ui/kmessagewidget.cpp
-	qt-ui/maintab.cpp
-	qt-ui/mainwindow.cpp
-	qt-ui/modeldelegates.cpp
-	qt-ui/metrics.cpp
-	qt-ui/notificationwidget.cpp
-	qt-ui/preferences.cpp
-	qt-ui/simplewidgets.cpp
-	qt-ui/starwidget.cpp
-	qt-ui/subsurfacewebservices.cpp
-	qt-ui/tableview.cpp
-	qt-ui/divelogimportdialog.cpp
-	qt-ui/tagwidget.cpp
-	qt-ui/groupedlineedit.cpp
-	${USERMANUAL}
-	qt-ui/divelogexportdialog.cpp
-	qt-ui/divepicturewidget.cpp
-	qt-ui/usersurvey.cpp
-	qt-ui/configuredivecomputerdialog.cpp
-	qt-ui/undocommands.cpp
-	qt-ui/locationinformation.cpp
-	qt-ui/qtwaitingspinner.cpp
-	${SUBSURFACE_PRINTING_SRCS}
-	${SOCIALNETWORKS}
-	${BT_SRC_FILES}
-)
-source_group("Subsurface Interface" FILES ${SUBSURFACE_INTERFACE})
-
-# the profile widget
-set(SUBSURFACE_PROFILE_LIB_SRCS
-	qt-ui/profile/profilewidget2.cpp
-	qt-ui/profile/diverectitem.cpp
-	qt-ui/profile/divepixmapitem.cpp
-	qt-ui/profile/divelineitem.cpp
-	qt-ui/profile/divetextitem.cpp
-	qt-ui/profile/animationfunctions.cpp
-	qt-ui/profile/divecartesianaxis.cpp
-	qt-ui/profile/diveprofileitem.cpp
-	qt-ui/profile/diveeventitem.cpp
-	qt-ui/profile/divetooltipitem.cpp
-	qt-ui/profile/ruleritem.cpp
-	qt-ui/profile/tankitem.cpp
-)
-source_group("Subsurface Profile" FILES ${SUBSURFACE_PROFILE_LIB_SRCS})
-
-# the yearly statistics widget.
-set(SUBSURFACE_STATISTICS_LIB_SRCS
-	qt-ui/statistics/statisticswidget.cpp
-	qt-ui/statistics/yearstatistics.cpp
-	qt-ui/statistics/statisticsbar.cpp
-	qt-ui/statistics/monthstatistics.cpp
-)
-source_group("Subsurface Statistics" FILES ${SUBSURFACE_STATISTICS_LIB_SRCS})
+endif()
+
+if(BTSUPPORT)
+	add_definitions(-DBT_SUPPORT)
+endif()
 
 # the main app.
 set(SUBSURFACE_APP
-	main.cpp
-	qt-gui.cpp
-	qthelper.cpp
+	subsurface-desktop-main.cpp
+	subsurface-desktop-helper.cpp
 )
-source_group("Subsurface App" FILES ${SUBSURFACE_APP})
 
-# create the libraries
-file(GLOB SUBSURFACE_UI qt-ui/*.ui)
-qt5_wrap_ui(SUBSURFACE_UI_HDRS ${SUBSURFACE_UI})
-qt5_add_resources(SUBSURFACE_RESOURCES subsurface.qrc)
-source_group("Subsurface Interface Files" FILES ${SUBSURFACE_UI})
-
-add_library(subsurface_corelib STATIC ${SUBSURFACE_CORE_LIB_SRCS} )
-target_link_libraries(subsurface_corelib ${QT_LIBRARIES})
-add_library(subsurface_models STATIC ${SUBSURFACE_MODELS_LIB_SRCS})
-target_link_libraries(subsurface_models ${QT_LIBRARIES})
-add_library(subsurface_profile STATIC ${SUBSURFACE_PROFILE_LIB_SRCS})
-target_link_libraries(subsurface_profile ${QT_LIBRARIES})
-add_library(subsurface_statistics STATIC ${SUBSURFACE_STATISTICS_LIB_SRCS})
-target_link_libraries(subsurface_statistics ${QT_LIBRARIES})
-add_library(subsurface_generated_ui STATIC ${SUBSURFACE_UI_HDRS})
-target_link_libraries(subsurface_generated_ui ${QT_LIBRARIES})
-add_library(subsurface_interface STATIC ${SUBSURFACE_INTERFACE})
-target_link_libraries(subsurface_interface ${QT_LIBRARIES} ${MARBLE_LIBRARIES})
+source_group("Subsurface App" FILES ${SUBSURFACE_APP})
 
 # add pthread to the end of the library list on Linux
 # this is only needed on Ubuntu (why do these idiots break everything?)
@@ -511,13 +352,19 @@ endif()
 
 # create the executables
 if(SUBSURFACE_MOBILE)
-	set(MOBILE_SRC qt-mobile/qmlmanager.cpp qt-mobile/qmlprofile.cpp qt-models/divelistmodel.cpp)
+	set(MOBILE_SRC
+		qt-mobile/qmlmanager.cpp
+		qt-mobile/qmlprofile.cpp
+		qt-models/divelistmodel.cpp
+		subsurface-android-main.cpp
+		subsurface-android-helper.cpp
+	)
 	add_definitions(-DSUBSURFACE_MOBILE)
 	qt5_add_resources(MOBILE_RESOURCES qt-mobile/mobile-resources.qrc)
 	if(ANDROID)
-		add_library(subsurface-mobile SHARED ${MOBILE_SRC} ${SUBSURFACE_PKG} ${SUBSURFACE_APP} ${SUBSURFACE_RESOURCES} ${MOBILE_RESOURCES})
+		add_library(subsurface-mobile SHARED ${MOBILE_SRC} ${SUBSURFACE_PKG} ${SUBSURFACE_RESOURCES} ${MOBILE_RESOURCES})
 	else()
-		add_executable(subsurface-mobile ${MOBILE_SRC} ${SUBSURFACE_PKG} ${SUBSURFACE_APP} ${SUBSURFACE_RESOURCES} ${MOBILE_RESOURCES})
+		add_executable(subsurface-mobile ${MOBILE_SRC} ${SUBSURFACE_PKG} ${SUBSURFACE_RESOURCES} ${MOBILE_RESOURCES})
 	endif()
 	target_link_libraries(
 		subsurface-mobile
@@ -528,25 +375,26 @@ if(SUBSURFACE_MOBILE)
 		subsurface_models
 		subsurface_corelib
 		${SUBSURFACE_LINK_LIBRARIES})
+endif()
+
+if(ANDROID)
+	# Produce a shared-library instead of a program.
+	# Something that androiddeployqt can work with.
+	# this is the desktop version, running on android.
+	add_library(${SUBSURFACE_TARGET} SHARED ${SUBSURFACE_PKG} ${SUBSURFACE_APP} ${SUBSURFACE_RESOURCES})
 else()
-	if(ANDROID)
-		# Produce a shared-library instead of a program.
-		# Something that androiddeployqt can work with.
-		add_library(${SUBSURFACE_TARGET} SHARED ${SUBSURFACE_PKG} ${SUBSURFACE_APP} ${SUBSURFACE_RESOURCES})
-	else()
-		add_executable(${SUBSURFACE_TARGET} MACOSX_BUNDLE WIN32 ${SUBSURFACE_PKG} ${SUBSURFACE_APP} ${SUBSURFACE_RESOURCES})
-	endif()
-	target_link_libraries(
-		${SUBSURFACE_TARGET}
-		subsurface_generated_ui
-		subsurface_interface
-		subsurface_profile
-		subsurface_statistics
-		subsurface_models
-		subsurface_corelib
-		${SUBSURFACE_LINK_LIBRARIES}
-)
+	add_executable(${SUBSURFACE_TARGET} MACOSX_BUNDLE WIN32 ${SUBSURFACE_PKG} ${SUBSURFACE_APP} ${SUBSURFACE_RESOURCES})
 endif()
+target_link_libraries(
+	${SUBSURFACE_TARGET}
+	subsurface_generated_ui
+	subsurface_interface
+	subsurface_profile
+	subsurface_statistics
+	subsurface_models
+	subsurface_corelib
+	${SUBSURFACE_LINK_LIBRARIES}
+)
 
 add_dependencies(subsurface_statistics subsurface_generated_ui)
 add_dependencies(subsurface_profile subsurface_generated_ui)
@@ -568,32 +416,9 @@ if(CMAKE_SYSTEM_NAME STREQUAL "Windows")
 endif()
 
 # build an automated html exporter
-add_executable(export-html EXCLUDE_FROM_ALL export-html.cpp qt-init.cpp qthelper.cpp ${SUBSURFACE_RESOURCES})
+add_executable(export-html EXCLUDE_FROM_ALL export-html.cpp ${SUBSURFACE_RESOURCES})
 target_link_libraries(export-html subsurface_corelib ${SUBSURFACE_LINK_LIBRARIES})
 
-# QTest based tests
-macro(TEST NAME FILE)
-	add_executable(${NAME} EXCLUDE_FROM_ALL tests/${FILE} ${SUBSURFACE_RESOURCES})
-	target_link_libraries(${NAME} subsurface_corelib ${QT_TEST_LIBRARIES} ${SUBSURFACE_LINK_LIBRARIES})
-	add_test(NAME ${NAME}_build COMMAND "${CMAKE_COMMAND}" --build ${CMAKE_BINARY_DIR} --target ${NAME})
-	add_test(NAME ${NAME}_run COMMAND ${NAME})
-	set_tests_properties(${NAME}_run PROPERTIES DEPENDS ${NAME}_build)
-endmacro()
-
-add_definitions(-DSUBSURFACE_SOURCE="${CMAKE_SOURCE_DIR}")
-add_definitions(-g)
-if(NOT NO_TESTS)
-	enable_testing()
-	TEST(TestUnitConversion testunitconversion.cpp)
-	TEST(TestProfile testprofile.cpp)
-	TEST(TestGpsCoords testgpscoords.cpp)
-	TEST(TestParse testparse.cpp)
-	TEST(TestPlan testplan.cpp)
-	TEST(TestDiveSiteDuplication testdivesiteduplication.cpp)
-	TEST(TestRenumber testrenumber.cpp)
-	TEST(TestGitStorage testgitstorage.cpp)
-endif()
-
 # install a few things so that one can run Subsurface from the build
 # directory
 if(NOT insource)
@@ -804,7 +629,7 @@ if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
 	install(DIRECTORY marbledata/bitmaps DESTINATION share/subsurface/data)
 	install(FILES subsurface.debug DESTINATION bin)
 	install(FILES subsurface.desktop DESTINATION share/applications)
-	install(FILES subsurface-icon.svg DESTINATION share/icons/hicolor/scalable/apps)
+	install(FILES icons/subsurface-icon.svg DESTINATION share/icons/hicolor/scalable/apps)
 	install(DIRECTORY Documentation/images DESTINATION share/subsurface/Documentation)
 	install(FILES ${DOCFILES} DESTINATION share/subsurface/Documentation)
 	install(DIRECTORY theme DESTINATION share/subsurface)
@@ -822,7 +647,12 @@ if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
 		)
 	endif()
 endif()
+
 # get_cmake_property(_variableNames VARIABLES)
 # foreach (_variableName ${_variableNames})
 #     message(STATUS "${_variableName}=${${_variableName}}")
 # endforeach()
+
+if (MAKE_TESTS)
+	add_subdirectory(tests)
+endif()
diff --git a/desktop-widgets/CMakeLists.txt b/desktop-widgets/CMakeLists.txt
new file mode 100644
index 000000000..0a0059ee3
--- /dev/null
+++ b/desktop-widgets/CMakeLists.txt
@@ -0,0 +1,93 @@
+# create the libraries
+file(GLOB SUBSURFACE_UI *.ui)
+qt5_wrap_ui(SUBSURFACE_UI_HDRS ${SUBSURFACE_UI})
+source_group("Subsurface Interface Files" FILES ${SUBSURFACE_UI})
+
+if(BTSUPPORT)
+	set(BT_SRC_FILES btdeviceselectiondialog.cpp)
+endif()
+
+include_directories(.
+	${CMAKE_CURRENT_BINARY_DIR}
+	${CMAKE_BINARY_DIR}
+)
+
+add_subdirectory(preferences)
+add_subdirectory(plugins)
+
+# the interface, in C++
+set(SUBSURFACE_INTERFACE
+	updatemanager.cpp
+	about.cpp
+	divecomputermanagementdialog.cpp
+	divelistview.cpp
+	diveplanner.cpp
+	diveshareexportdialog.cpp
+	downloadfromdivecomputer.cpp
+	globe.cpp
+	kmessagewidget.cpp
+	maintab.cpp
+	mainwindow.cpp
+	modeldelegates.cpp
+	notificationwidget.cpp
+	simplewidgets.cpp
+	starwidget.cpp
+	subsurfacewebservices.cpp
+	tableview.cpp
+	divelogimportdialog.cpp
+	tagwidget.cpp
+	groupedlineedit.cpp
+	divelogexportdialog.cpp
+	divepicturewidget.cpp
+	usersurvey.cpp
+	configuredivecomputerdialog.cpp
+	undocommands.cpp
+	locationinformation.cpp
+	qtwaitingspinner.cpp
+)
+
+if(NOT NO_USERMANUAL)
+	set(SUBSURFACE_INTERFACE ${SUBSURFACE_INTERFACE}
+		usermanual.cpp
+	)
+endif()
+
+if(NOT NO_PRINTING)
+	set(SUBSURFACE_INTERFACE ${SUBSURFACE_INTERFACE}
+		templateedit.cpp
+		printdialog.cpp
+		printoptions.cpp
+		printer.cpp
+		templatelayout.cpp
+	)
+endif()
+
+if (FBSUPPORT)
+	set(SUBSURFACE_INTERFACE ${SUBSURFACE_INTERFACE}
+		socialnetworks.cpp
+	)
+endif()
+
+if (BTSUPPORT)
+	set(SUBSURFACE_INTERFACE ${SUBSURFACE_INTERFACE}
+		btdeviceselectiondialog.cpp
+	)
+endif()
+
+source_group("Subsurface Interface" FILES ${SUBSURFACE_INTERFACE})
+
+# the yearly statistics widget.
+set(SUBSURFACE_STATISTICS_LIB_SRCS
+	statistics/statisticswidget.cpp
+	statistics/yearstatistics.cpp
+	statistics/statisticsbar.cpp
+	statistics/monthstatistics.cpp
+)
+source_group("Subsurface Statistics" FILES ${SUBSURFACE_STATISTICS_LIB_SRCS})
+
+add_library(subsurface_statistics STATIC ${SUBSURFACE_STATISTICS_LIB_SRCS})
+target_link_libraries(subsurface_statistics ${QT_LIBRARIES})
+add_library(subsurface_generated_ui STATIC ${SUBSURFACE_UI_HDRS})
+target_link_libraries(subsurface_generated_ui ${QT_LIBRARIES})
+add_library(subsurface_interface STATIC ${SUBSURFACE_INTERFACE})
+target_link_libraries(subsurface_interface ${QT_LIBRARIES} ${MARBLE_LIBRARIES} subsurface_desktop_preferences)
diff --git a/qt-ui/about.cpp b/desktop-widgets/about.cpp
index e0df55980..e0df55980 100644
--- a/qt-ui/about.cpp
+++ b/desktop-widgets/about.cpp
diff --git a/qt-ui/about.h b/desktop-widgets/about.h
index 47423aea2..47423aea2 100644
--- a/qt-ui/about.h
+++ b/desktop-widgets/about.h
diff --git a/qt-ui/about.ui b/desktop-widgets/about.ui
index 0c1735e26..0c1735e26 100644
--- a/qt-ui/about.ui
+++ b/desktop-widgets/about.ui
diff --git a/qt-ui/btdeviceselectiondialog.cpp b/desktop-widgets/btdeviceselectiondialog.cpp
index fb2cbc1f3..fb2cbc1f3 100644
--- a/qt-ui/btdeviceselectiondialog.cpp
+++ b/desktop-widgets/btdeviceselectiondialog.cpp
diff --git a/qt-ui/btdeviceselectiondialog.h b/desktop-widgets/btdeviceselectiondialog.h
index 7651f164b..7651f164b 100644
--- a/qt-ui/btdeviceselectiondialog.h
+++ b/desktop-widgets/btdeviceselectiondialog.h
diff --git a/qt-ui/btdeviceselectiondialog.ui b/desktop-widgets/btdeviceselectiondialog.ui
index 4aa83cf1c..4aa83cf1c 100644
--- a/qt-ui/btdeviceselectiondialog.ui
+++ b/desktop-widgets/btdeviceselectiondialog.ui
diff --git a/qt-ui/configuredivecomputerdialog.cpp b/desktop-widgets/configuredivecomputerdialog.cpp
index ddb9450de..ddb9450de 100644
--- a/qt-ui/configuredivecomputerdialog.cpp
+++ b/desktop-widgets/configuredivecomputerdialog.cpp
diff --git a/qt-ui/configuredivecomputerdialog.h b/desktop-widgets/configuredivecomputerdialog.h
index be76644a9..9ad30ac67 100644
--- a/qt-ui/configuredivecomputerdialog.h
+++ b/desktop-widgets/configuredivecomputerdialog.h
@@ -4,7 +4,7 @@
 #include <QDialog>
 #include <QStringListModel>
 #include "ui_configuredivecomputerdialog.h"
-#include "../libdivecomputer.h"
+#include "subsurface-core/libdivecomputer.h"
 #include "configuredivecomputer.h"
 #include <QStyledItemDelegate>
 #include <QNetworkAccessManager>
diff --git a/qt-ui/configuredivecomputerdialog.ui b/desktop-widgets/configuredivecomputerdialog.ui
index 0986d71ca..0986d71ca 100644
--- a/qt-ui/configuredivecomputerdialog.ui
+++ b/desktop-widgets/configuredivecomputerdialog.ui
diff --git a/qt-ui/css/tableviews.css b/desktop-widgets/css/tableviews.css
index e69de29bb..e69de29bb 100644
--- a/qt-ui/css/tableviews.css
+++ b/desktop-widgets/css/tableviews.css
diff --git a/qt-ui/divecomponentselection.ui b/desktop-widgets/divecomponentselection.ui
index 8262a5c2a..8262a5c2a 100644
--- a/qt-ui/divecomponentselection.ui
+++ b/desktop-widgets/divecomponentselection.ui
diff --git a/qt-ui/divecomputermanagementdialog.cpp b/desktop-widgets/divecomputermanagementdialog.cpp
index fd9273ffb..fd9273ffb 100644
--- a/qt-ui/divecomputermanagementdialog.cpp
+++ b/desktop-widgets/divecomputermanagementdialog.cpp
diff --git a/qt-ui/divecomputermanagementdialog.h b/desktop-widgets/divecomputermanagementdialog.h
index d065a0208..d065a0208 100644
--- a/qt-ui/divecomputermanagementdialog.h
+++ b/desktop-widgets/divecomputermanagementdialog.h
diff --git a/qt-ui/divecomputermanagementdialog.ui b/desktop-widgets/divecomputermanagementdialog.ui
index 0e5db2c41..0e5db2c41 100644
--- a/qt-ui/divecomputermanagementdialog.ui
+++ b/desktop-widgets/divecomputermanagementdialog.ui
diff --git a/qt-ui/divelistview.cpp b/desktop-widgets/divelistview.cpp
index d2386ecf1..d2386ecf1 100644
--- a/qt-ui/divelistview.cpp
+++ b/desktop-widgets/divelistview.cpp
diff --git a/qt-ui/divelistview.h b/desktop-widgets/divelistview.h
index aaec37af5..aaec37af5 100644
--- a/qt-ui/divelistview.h
+++ b/desktop-widgets/divelistview.h
diff --git a/qt-ui/divelogexportdialog.cpp b/desktop-widgets/divelogexportdialog.cpp
index 7a406b982..7a406b982 100644
--- a/qt-ui/divelogexportdialog.cpp
+++ b/desktop-widgets/divelogexportdialog.cpp
diff --git a/qt-ui/divelogexportdialog.h b/desktop-widgets/divelogexportdialog.h
index a5b5cc770..a5b5cc770 100644
--- a/qt-ui/divelogexportdialog.h
+++ b/desktop-widgets/divelogexportdialog.h
diff --git a/qt-ui/divelogexportdialog.ui b/desktop-widgets/divelogexportdialog.ui
index 02c8cf38b..02c8cf38b 100644
--- a/qt-ui/divelogexportdialog.ui
+++ b/desktop-widgets/divelogexportdialog.ui
diff --git a/qt-ui/divelogimportdialog.cpp b/desktop-widgets/divelogimportdialog.cpp
index 025d181d1..025d181d1 100644
--- a/qt-ui/divelogimportdialog.cpp
+++ b/desktop-widgets/divelogimportdialog.cpp
diff --git a/qt-ui/divelogimportdialog.h b/desktop-widgets/divelogimportdialog.h
index 03bb14029..2d12c7cac 100644
--- a/qt-ui/divelogimportdialog.h
+++ b/desktop-widgets/divelogimportdialog.h
@@ -9,8 +9,8 @@
 #include <QAbstractTableModel>
 #include <QStyledItemDelegate>
 
-#include "../dive.h"
-#include "../divelist.h"
+#include "subsurface-core/dive.h"
+#include "subsurface-core/divelist.h"
 
 namespace Ui {
 	class DiveLogImportDialog;
diff --git a/qt-ui/divelogimportdialog.ui b/desktop-widgets/divelogimportdialog.ui
index 6d154b7c6..6d154b7c6 100644
--- a/qt-ui/divelogimportdialog.ui
+++ b/desktop-widgets/divelogimportdialog.ui
diff --git a/qt-ui/divepicturewidget.cpp b/desktop-widgets/divepicturewidget.cpp
index bed3d3bd1..bed3d3bd1 100644
--- a/qt-ui/divepicturewidget.cpp
+++ b/desktop-widgets/divepicturewidget.cpp
diff --git a/qt-ui/divepicturewidget.h b/desktop-widgets/divepicturewidget.h
index 54f5bb826..54f5bb826 100644
--- a/qt-ui/divepicturewidget.h
+++ b/desktop-widgets/divepicturewidget.h
diff --git a/qt-ui/diveplanner.cpp b/desktop-widgets/diveplanner.cpp
index b4413d11a..fd14944f0 100644
--- a/qt-ui/diveplanner.cpp
+++ b/desktop-widgets/diveplanner.cpp
@@ -5,7 +5,7 @@
 #include "helpers.h"
 #include "cylindermodel.h"
 #include "models.h"
-#include "profile/profilewidget2.h"
+#include "profile-widget/profilewidget2.h"
 #include "diveplannermodel.h"
 
 #include <QGraphicsSceneMouseEvent>
@@ -104,7 +104,7 @@ void DiveHandler::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
 DivePlannerWidget::DivePlannerWidget(QWidget *parent, Qt::WindowFlags f) : QWidget(parent, f)
 {
 	ui.setupUi(this);
-	ui.dateEdit->setDisplayFormat(getDateFormat());
+	ui.dateEdit->setDisplayFormat(prefs.date_format);
 	ui.tableWidget->setTitle(tr("Dive planner points"));
 	ui.tableWidget->setModel(plannerModel);
 	plannerModel->setRecalc(true);
@@ -328,11 +328,11 @@ PlannerSettingsWidget::PlannerSettingsWidget(QWidget *parent, Qt::WindowFlags f)
 	modeMapper->setMapping(ui.recreational_deco, int(RECREATIONAL));
 	modeMapper->setMapping(ui.buehlmann_deco, int(BUEHLMANN));
 	modeMapper->setMapping(ui.vpmb_deco, int(VPMB));
-	
+
 	connect(ui.recreational_deco, SIGNAL(clicked()), modeMapper, SLOT(map()));
 	connect(ui.buehlmann_deco, SIGNAL(clicked()), modeMapper, SLOT(map()));
 	connect(ui.vpmb_deco, SIGNAL(clicked()), modeMapper, SLOT(map()));
-	
+
 	connect(ui.lastStop, SIGNAL(toggled(bool)), plannerModel, SLOT(setLastStop6m(bool)));
 	connect(ui.verbatim_plan, SIGNAL(toggled(bool)), plannerModel, SLOT(setVerbatim(bool)));
 	connect(ui.display_duration, SIGNAL(toggled(bool)), plannerModel, SLOT(setDisplayDuration(bool)));
diff --git a/qt-ui/diveplanner.h b/desktop-widgets/diveplanner.h
index b2e03a97b..b2e03a97b 100644
--- a/qt-ui/diveplanner.h
+++ b/desktop-widgets/diveplanner.h
diff --git a/qt-ui/diveplanner.ui b/desktop-widgets/diveplanner.ui
index adb44fad9..adb44fad9 100644
--- a/qt-ui/diveplanner.ui
+++ b/desktop-widgets/diveplanner.ui
diff --git a/qt-ui/diveshareexportdialog.cpp b/desktop-widgets/diveshareexportdialog.cpp
index 9fe6eefd6..9fe6eefd6 100644
--- a/qt-ui/diveshareexportdialog.cpp
+++ b/desktop-widgets/diveshareexportdialog.cpp
diff --git a/qt-ui/diveshareexportdialog.h b/desktop-widgets/diveshareexportdialog.h
index 85dadf5f1..85dadf5f1 100644
--- a/qt-ui/diveshareexportdialog.h
+++ b/desktop-widgets/diveshareexportdialog.h
diff --git a/qt-ui/diveshareexportdialog.ui b/desktop-widgets/diveshareexportdialog.ui
index 2235740c8..2235740c8 100644
--- a/qt-ui/diveshareexportdialog.ui
+++ b/desktop-widgets/diveshareexportdialog.ui
diff --git a/qt-ui/downloadfromdivecomputer.cpp b/desktop-widgets/downloadfromdivecomputer.cpp
index 4c8fa6b4a..4c8fa6b4a 100644
--- a/qt-ui/downloadfromdivecomputer.cpp
+++ b/desktop-widgets/downloadfromdivecomputer.cpp
diff --git a/qt-ui/downloadfromdivecomputer.h b/desktop-widgets/downloadfromdivecomputer.h
index 7acd49e95..7acd49e95 100644
--- a/qt-ui/downloadfromdivecomputer.h
+++ b/desktop-widgets/downloadfromdivecomputer.h
diff --git a/qt-ui/downloadfromdivecomputer.ui b/desktop-widgets/downloadfromdivecomputer.ui
index b1f152034..b1f152034 100644
--- a/qt-ui/downloadfromdivecomputer.ui
+++ b/desktop-widgets/downloadfromdivecomputer.ui
diff --git a/qt-ui/filterwidget.ui b/desktop-widgets/filterwidget.ui
index 1450d81b2..1450d81b2 100644
--- a/qt-ui/filterwidget.ui
+++ b/desktop-widgets/filterwidget.ui
diff --git a/qt-ui/globe.cpp b/desktop-widgets/globe.cpp
index 135f195a1..135f195a1 100644
--- a/qt-ui/globe.cpp
+++ b/desktop-widgets/globe.cpp
diff --git a/qt-ui/globe.h b/desktop-widgets/globe.h
index 8cc1265e4..8cc1265e4 100644
--- a/qt-ui/globe.h
+++ b/desktop-widgets/globe.h
diff --git a/qt-ui/groupedlineedit.cpp b/desktop-widgets/groupedlineedit.cpp
index 9ce5e175c..9ce5e175c 100644
--- a/qt-ui/groupedlineedit.cpp
+++ b/desktop-widgets/groupedlineedit.cpp
diff --git a/qt-ui/groupedlineedit.h b/desktop-widgets/groupedlineedit.h
index c9cd1a0e0..c9cd1a0e0 100644
--- a/qt-ui/groupedlineedit.h
+++ b/desktop-widgets/groupedlineedit.h
diff --git a/qt-ui/kmessagewidget.cpp b/desktop-widgets/kmessagewidget.cpp
index 2e506af2d..2e506af2d 100644
--- a/qt-ui/kmessagewidget.cpp
+++ b/desktop-widgets/kmessagewidget.cpp
diff --git a/qt-ui/kmessagewidget.h b/desktop-widgets/kmessagewidget.h
index 885d2a78f..885d2a78f 100644
--- a/qt-ui/kmessagewidget.h
+++ b/desktop-widgets/kmessagewidget.h
diff --git a/qt-ui/listfilter.ui b/desktop-widgets/listfilter.ui
index 48d813d21..48d813d21 100644
--- a/qt-ui/listfilter.ui
+++ b/desktop-widgets/listfilter.ui
diff --git a/qt-ui/locationInformation.ui b/desktop-widgets/locationInformation.ui
index 58d065648..58d065648 100644
--- a/qt-ui/locationInformation.ui
+++ b/desktop-widgets/locationInformation.ui
diff --git a/qt-ui/locationinformation.cpp b/desktop-widgets/locationinformation.cpp
index aee0b7328..aee0b7328 100644
--- a/qt-ui/locationinformation.cpp
+++ b/desktop-widgets/locationinformation.cpp
diff --git a/qt-ui/locationinformation.h b/desktop-widgets/locationinformation.h
index 243df939b..243df939b 100644
--- a/qt-ui/locationinformation.h
+++ b/desktop-widgets/locationinformation.h
diff --git a/qt-ui/maintab.cpp b/desktop-widgets/maintab.cpp
index 0afb7b4c0..c7961735a 100644
--- a/qt-ui/maintab.cpp
+++ b/desktop-widgets/maintab.cpp
@@ -13,7 +13,7 @@
 #include "diveplannermodel.h"
 #include "divelistview.h"
 #include "display.h"
-#include "profile/profilewidget2.h"
+#include "profile-widget/profilewidget2.h"
 #include "diveplanner.h"
 #include "divesitehelpers.h"
 #include "cylindermodel.h"
@@ -43,7 +43,7 @@ MainTab::MainTab(QWidget *parent) : QTabWidget(parent),
 	currentTrip(0)
 {
 	ui.setupUi(this);
-	ui.dateEdit->setDisplayFormat(getDateFormat());
+	ui.dateEdit->setDisplayFormat(prefs.date_format);
 
 	memset(&displayed_dive, 0, sizeof(displayed_dive));
 	memset(&displayedTrip, 0, sizeof(displayedTrip));
diff --git a/qt-ui/maintab.h b/desktop-widgets/maintab.h
index 20b4da690..20b4da690 100644
--- a/qt-ui/maintab.h
+++ b/desktop-widgets/maintab.h
diff --git a/qt-ui/maintab.ui b/desktop-widgets/maintab.ui
index 2c515a225..7bc516b1a 100644
--- a/qt-ui/maintab.ui
+++ b/desktop-widgets/maintab.ui
@@ -525,8 +525,8 @@
         <rect>
          <x>0</x>
          <y>0</y>
-         <width>70</width>
-         <height>16</height>
+         <width>445</width>
+         <height>754</height>
         </rect>
        </property>
        <layout class="QGridLayout" name="equipmentTabScrollAreaLayout">
@@ -1229,7 +1229,7 @@
   <customwidget>
    <class>TagWidget</class>
    <extends>QPlainTextEdit</extends>
-   <header>qt-ui/tagwidget.h</header>
+   <header>tagwidget.h</header>
   </customwidget>
   <customwidget>
    <class>DivePictureWidget</class>
diff --git a/qt-ui/mainwindow.cpp b/desktop-widgets/mainwindow.cpp
index e0476381f..dc45d1d8d 100644
--- a/qt-ui/mainwindow.cpp
+++ b/desktop-widgets/mainwindow.cpp
@@ -11,17 +11,17 @@
 #include <QSettings>
 #include <QShortcut>
 #include <QToolBar>
+
 #include "version.h"
 #include "divelistview.h"
 #include "downloadfromdivecomputer.h"
-#include "preferences.h"
 #include "subsurfacewebservices.h"
 #include "divecomputermanagementdialog.h"
 #include "about.h"
 #include "updatemanager.h"
 #include "planner.h"
 #include "filtermodels.h"
-#include "profile/profilewidget2.h"
+#include "profile-widget/profilewidget2.h"
 #include "globe.h"
 #include "divecomputer.h"
 #include "maintab.h"
@@ -40,6 +40,7 @@
 #include "divesitehelpers.h"
 #include "windowtitleupdate.h"
 #include "locationinformation.h"
+#include "preferences/preferencesdialog.h"
 
 #ifndef NO_USERMANUAL
 #include "usermanual.h"
@@ -50,6 +51,9 @@
 #include <QUndoStack>
 #include <qthelper.h>
 #include <QtConcurrentRun>
+#include "subsurface-core/color.h"
+#include "subsurface-core/isocialnetworkintegration.h"
+#include "subsurface-core/pluginmanager.h"
 
 #if defined(FBSUPPORT)
 #include "socialnetworks.h"
@@ -250,6 +254,26 @@ MainWindow::MainWindow() : QMainWindow(),
 	ui.actionFacebook->setEnabled(false);
 #endif
 
+	if(PluginManager::instance().socialNetworkIntegrationPlugins().count()) {
+		QMenu *connections = new QMenu(tr("Connect to"));
+		for(ISocialNetworkIntegration *plugin : PluginManager::instance().socialNetworkIntegrationPlugins()){
+			QAction *toggle_connection = new QAction(this);
+			toggle_connection->setText(plugin->socialNetworkName());
+			toggle_connection->setIcon(QIcon(plugin->socialNetworkIcon()));
+			toggle_connection->setData(QVariant::fromValue(plugin));
+
+			QAction *share_on = new QAction(this);
+			share_on->setText(plugin->socialNetworkName());
+			share_on->setIcon(QIcon(plugin->socialNetworkIcon()));
+			share_on->setData(QVariant::fromValue(plugin));
+			ui.menuShare_on->addAction(share_on);
+			connections->addAction(toggle_connection);
+		}
+		ui.menuShare_on->addSeparator();
+		ui.menuShare_on->addMenu(connections);
+	} else {
+		ui.menubar->removeAction(ui.menuShare_on->menuAction());
+	}
 
 	ui.menubar->show();
 	set_git_update_cb(&updateProgress);
@@ -1164,7 +1188,7 @@ void MainWindow::initialUiSetup()
 	show();
 }
 
-const char *getSetting(QSettings &s, QString name)
+const char *getSetting(const QSettings &s,const QString& name)
 {
 	QVariant v;
 	v = s.value(name);
@@ -1758,6 +1782,7 @@ void MainWindow::editCurrentDive()
 	}
 }
 
+// TODO: Remove the dependency to the PreferencesDialog here.
 #define PREF_PROFILE(QT_PREFS)            \
 	QSettings s;                      \
 	s.beginGroup("TecDetails");       \
@@ -1897,8 +1922,7 @@ void MainWindow::setApplicationState(const QByteArray& state) {
 
 void MainWindow::showProgressBar()
 {
-	if (progressDialog)
-		delete progressDialog;
+	delete progressDialog;
 
 	progressDialog = new QProgressDialog(tr("Contacting cloud service..."), tr("Cancel"), 0, 100, this);
 	progressDialog->setWindowModality(Qt::WindowModal);
diff --git a/qt-ui/mainwindow.h b/desktop-widgets/mainwindow.h
index 02ec2478c..02ec2478c 100644
--- a/qt-ui/mainwindow.h
+++ b/desktop-widgets/mainwindow.h
diff --git a/qt-ui/mainwindow.ui b/desktop-widgets/mainwindow.ui
index 5e3200cfc..c62e1df7f 100644
--- a/qt-ui/mainwindow.ui
+++ b/desktop-widgets/mainwindow.ui
@@ -142,7 +142,6 @@
      <string>Share on</string>
     </property>
     <addaction name="separator"/>
-    <addaction name="actionFacebook"/>
    </widget>
    <addaction name="menuFile"/>
    <addaction name="menu_Edit"/>
diff --git a/qt-ui/marble/GeoDataTreeModel.h b/desktop-widgets/marble/GeoDataTreeModel.h
index 39eff8388..39eff8388 100644
--- a/qt-ui/marble/GeoDataTreeModel.h
+++ b/desktop-widgets/marble/GeoDataTreeModel.h
diff --git a/qt-ui/modeldelegates.cpp b/desktop-widgets/modeldelegates.cpp
index 881037a83..1b1a31c0b 100644
--- a/qt-ui/modeldelegates.cpp
+++ b/desktop-widgets/modeldelegates.cpp
@@ -5,7 +5,7 @@
 #include "cylindermodel.h"
 #include "models.h"
 #include "starwidget.h"
-#include "profile/profilewidget2.h"
+#include "profile-widget/profilewidget2.h"
 #include "tankinfomodel.h"
 #include "weigthsysteminfomodel.h"
 #include "weightmodel.h"
diff --git a/qt-ui/modeldelegates.h b/desktop-widgets/modeldelegates.h
index 95701775a..95701775a 100644
--- a/qt-ui/modeldelegates.h
+++ b/desktop-widgets/modeldelegates.h
diff --git a/qt-ui/notificationwidget.cpp b/desktop-widgets/notificationwidget.cpp
index 103c0d068..103c0d068 100644
--- a/qt-ui/notificationwidget.cpp
+++ b/desktop-widgets/notificationwidget.cpp
diff --git a/qt-ui/notificationwidget.h b/desktop-widgets/notificationwidget.h
index 8a551a0b3..8a551a0b3 100644
--- a/qt-ui/notificationwidget.h
+++ b/desktop-widgets/notificationwidget.h
diff --git a/qt-ui/plannerDetails.ui b/desktop-widgets/plannerDetails.ui
index 1f2790d85..1f2790d85 100644
--- a/qt-ui/plannerDetails.ui
+++ b/desktop-widgets/plannerDetails.ui
diff --git a/qt-ui/plannerSettings.ui b/desktop-widgets/plannerSettings.ui
index 4db69f883..4db69f883 100644
--- a/qt-ui/plannerSettings.ui
+++ b/desktop-widgets/plannerSettings.ui
diff --git a/desktop-widgets/plugins/CMakeLists.txt b/desktop-widgets/plugins/CMakeLists.txt
new file mode 100644
index 000000000..f424e172e
--- /dev/null
+++ b/desktop-widgets/plugins/CMakeLists.txt
@@ -0,0 +1 @@
+add_subdirectory(facebook)
\ No newline at end of file
diff --git a/desktop-widgets/plugins/facebook/CMakeLists.txt b/desktop-widgets/plugins/facebook/CMakeLists.txt
new file mode 100644
index 000000000..8628bd070
--- /dev/null
+++ b/desktop-widgets/plugins/facebook/CMakeLists.txt
@@ -0,0 +1,6 @@
+set(FACEBOOK_PLUGIN_SRCS facebook_integration.cpp)
+
+add_library(facebook_integration SHARED ${FACEBOOK_PLUGIN_SRCS})
+
+target_link_libraries(facebook_integration subsurface_corelib ${QT_LIBRARIES})
+add_dependencies(facebook_integration subsurface_corelib)
\ No newline at end of file
diff --git a/desktop-widgets/plugins/facebook/facebook_integration.cpp b/desktop-widgets/plugins/facebook/facebook_integration.cpp
new file mode 100644
index 000000000..e9b2297a0
--- /dev/null
+++ b/desktop-widgets/plugins/facebook/facebook_integration.cpp
@@ -0,0 +1,36 @@
+#include "facebook_integration.h"
+
+FacebookPlugin::FacebookPlugin(QObject* parent): QObject(parent)
+{
+
+}
+
+bool FacebookPlugin::isConnected()
+{
+
+}
+
+void FacebookPlugin::requestLogin()
+{
+
+}
+
+void FacebookPlugin::requestLogoff()
+{
+
+}
+
+QString FacebookPlugin::socialNetworkIcon() const
+{
+	return QString();
+}
+
+QString FacebookPlugin::socialNetworkName() const
+{
+	return tr("Facebook");
+}
+
+void FacebookPlugin::uploadCurrentDive()
+{
+
+}
diff --git a/desktop-widgets/plugins/facebook/facebook_integration.h b/desktop-widgets/plugins/facebook/facebook_integration.h
new file mode 100644
index 000000000..a9d212e7e
--- /dev/null
+++ b/desktop-widgets/plugins/facebook/facebook_integration.h
@@ -0,0 +1,21 @@
+#ifndef FACEBOOK_INTEGRATION_H
+#define FACEBOOK_INTEGRATION_H
+
+#include "subsurface-core/isocialnetworkintegration.h"
+#include <QString>
+
+class FacebookPlugin : public QObject, public ISocialNetworkIntegration {
+  Q_OBJECT
+  Q_PLUGIN_METADATA(IID "org.subsurface.plugins.ISocialNetworkIntegration")
+  Q_INTERFACES(ISocialNetworkIntegration)
+public:
+  explicit FacebookPlugin(QObject* parent = 0);
+  virtual bool isConnected();
+  virtual void requestLogin();
+  virtual void requestLogoff();
+  virtual QString socialNetworkIcon() const;
+  virtual QString socialNetworkName() const;
+  virtual void uploadCurrentDive();
+};
+
+#endif
\ No newline at end of file
diff --git a/desktop-widgets/preferences.cpp b/desktop-widgets/preferences.cpp
new file mode 100644
index 000000000..29e9d2458
--- /dev/null
+++ b/desktop-widgets/preferences.cpp
@@ -0,0 +1,173 @@
+#include "preferences.h"
+#include "mainwindow.h"
+#include "models.h"
+#include "divelocationmodel.h"
+#include "prefs-macros.h"
+#include "qthelper.h"
+#include "subsurfacestartup.h"
+
+#include <QSettings>
+#include <QFileDialog>
+#include <QMessageBox>
+#include <QShortcut>
+#include <QNetworkProxy>
+#include <QNetworkCookieJar>
+
+#include "subsurfacewebservices.h"
+
+#if !defined(Q_OS_ANDROID) && defined(FBSUPPORT)
+#include "socialnetworks.h"
+#include <QWebView>
+#endif
+
+PreferencesDialog *PreferencesDialog::instance()
+{
+	static PreferencesDialog *dialog = new PreferencesDialog(MainWindow::instance());
+	return dialog;
+}
+
+PreferencesDialog::PreferencesDialog(QWidget *parent, Qt::WindowFlags f) : QDialog(parent, f)
+{
+	ui.setupUi(this);
+	setAttribute(Qt::WA_QuitOnClose, false);
+
+#if !defined(Q_OS_ANDROID) && defined(FBSUPPORT)
+	FacebookManager *fb = FacebookManager::instance();
+	facebookWebView = new QWebView(this);
+	ui.fbWebviewContainer->layout()->addWidget(facebookWebView);
+	if (fb->loggedIn()) {
+		facebookLoggedIn();
+	} else {
+		facebookDisconnect();
+	}
+	connect(facebookWebView, &QWebView::urlChanged, fb, &FacebookManager::tryLogin);
+	connect(fb, &FacebookManager::justLoggedIn, this, &PreferencesDialog::facebookLoggedIn);
+	connect(ui.fbDisconnect, &QPushButton::clicked, fb, &FacebookManager::logout);
+	connect(fb, &FacebookManager::justLoggedOut, this, &PreferencesDialog::facebookDisconnect);
+#endif
+
+	connect(ui.buttonBox, SIGNAL(clicked(QAbstractButton *)), this, SLOT(buttonClicked(QAbstractButton *)));
+
+	//	connect(ui.defaultSetpoint, SIGNAL(valueChanged(double)), this, SLOT(defaultSetpointChanged(double)));
+	QShortcut *close = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_W), this);
+	connect(close, SIGNAL(activated()), this, SLOT(close()));
+	QShortcut *quit = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_Q), this);
+	connect(quit, SIGNAL(activated()), parent, SLOT(close()));
+	loadSettings();
+	setUiFromPrefs();
+	rememberPrefs();
+}
+
+void PreferencesDialog::facebookLoggedIn()
+{
+#if !defined(Q_OS_ANDROID) && defined(FBSUPPORT)
+	ui.fbDisconnect->show();
+	ui.fbWebviewContainer->hide();
+	ui.fbWebviewContainer->setEnabled(false);
+	ui.FBLabel->setText(tr("To disconnect Subsurface from your Facebook account, use the button below"));
+#endif
+}
+
+void PreferencesDialog::facebookDisconnect()
+{
+#if !defined(Q_OS_ANDROID) && defined(FBSUPPORT)
+	// remove the connect/disconnect button
+	// and instead add the login view
+	ui.fbDisconnect->hide();
+	ui.fbWebviewContainer->show();
+	ui.fbWebviewContainer->setEnabled(true);
+	ui.FBLabel->setText(tr("To connect to Facebook, please log in. This enables Subsurface to publish dives to your timeline"));
+	if (facebookWebView) {
+		facebookWebView->page()->networkAccessManager()->setCookieJar(new QNetworkCookieJar());
+		facebookWebView->setUrl(FacebookManager::instance()->connectUrl());
+	}
+#endif
+}
+
+void PreferencesDialog::showEvent(QShowEvent *event)
+{
+	setUiFromPrefs();
+	rememberPrefs();
+	QDialog::showEvent(event);
+}
+
+void PreferencesDialog::setUiFromPrefs()
+{
+
+}
+
+void PreferencesDialog::restorePrefs()
+{
+	prefs = oldPrefs;
+	setUiFromPrefs();
+}
+
+void PreferencesDialog::rememberPrefs()
+{
+	oldPrefs = prefs;
+}
+
+void PreferencesDialog::syncSettings()
+{
+}
+
+void PreferencesDialog::loadSettings()
+{
+	// This code was on the mainwindow, it should belong nowhere, but since we didn't
+	// correctly fixed this code yet ( too much stuff on the code calling preferences )
+	// force this here.
+	loadPreferences();
+	QSettings s;
+	QVariant v;
+}
+
+void PreferencesDialog::buttonClicked(QAbstractButton *button)
+{
+	switch (ui.buttonBox->standardButton(button)) {
+	case QDialogButtonBox::Discard:
+		restorePrefs();
+		syncSettings();
+		close();
+		break;
+	case QDialogButtonBox::Apply:
+		syncSettings();
+		break;
+	case QDialogButtonBox::FirstButton:
+		syncSettings();
+		close();
+		break;
+	default:
+		break; // ignore warnings.
+	}
+}
+#undef SB
+
+#if 0
+// TODO: Copy this later.
+void PreferencesDialog::on_resetSettings_clicked()
+{
+	QSettings s;
+	QMessageBox response(this);
+	response.setStandardButtons(QMessageBox::Ok | QMessageBox::Cancel);
+	response.setDefaultButton(QMessageBox::Cancel);
+	response.setWindowTitle(tr("Warning"));
+	response.setText(tr("If you click OK, all settings of Subsurface will be reset to their default values. This will be applied immediately."));
+	response.setWindowModality(Qt::WindowModal);
+
+	int result = response.exec();
+	if (result == QMessageBox::Ok) {
+		copy_prefs(&default_prefs, &prefs);
+		setUiFromPrefs();
+		Q_FOREACH (QString key, s.allKeys()) {
+			s.remove(key);
+		}
+		syncSettings();
+		close();
+	}
+}
+#endif
+
+void PreferencesDialog::emitSettingsChanged()
+{
+	emit settingsChanged();
+}
diff --git a/desktop-widgets/preferences.ui b/desktop-widgets/preferences.ui
new file mode 100644
index 000000000..8d0b18900
--- /dev/null
+++ b/desktop-widgets/preferences.ui
@@ -0,0 +1,241 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>PreferencesDialog</class>
+ <widget class="QDialog" name="PreferencesDialog">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>835</width>
+    <height>698</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Preferences</string>
+  </property>
+  <property name="windowIcon">
+   <iconset>
+    <normalon>:/subsurface-icon</normalon>
+   </iconset>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout_2">
+   <property name="leftMargin">
+    <number>5</number>
+   </property>
+   <property name="topMargin">
+    <number>5</number>
+   </property>
+   <property name="rightMargin">
+    <number>5</number>
+   </property>
+   <property name="bottomMargin">
+    <number>5</number>
+   </property>
+   <item>
+    <layout class="QHBoxLayout" name="mainHorizontalLayout">
+     <item>
+      <widget class="QListWidget" name="listWidget">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
+       <property name="minimumSize">
+        <size>
+         <width>120</width>
+         <height>0</height>
+        </size>
+       </property>
+       <property name="maximumSize">
+        <size>
+         <width>120</width>
+         <height>16777215</height>
+        </size>
+       </property>
+       <property name="iconSize">
+        <size>
+         <width>24</width>
+         <height>24</height>
+        </size>
+       </property>
+       <property name="textElideMode">
+        <enum>Qt::ElideNone</enum>
+       </property>
+       <property name="movement">
+        <enum>QListView::Static</enum>
+       </property>
+       <property name="isWrapping" stdset="0">
+        <bool>true</bool>
+       </property>
+       <property name="layoutMode">
+        <enum>QListView::Batched</enum>
+       </property>
+       <property name="spacing">
+        <number>0</number>
+       </property>
+       <property name="gridSize">
+        <size>
+         <width>110</width>
+         <height>40</height>
+        </size>
+       </property>
+       <property name="viewMode">
+        <enum>QListView::ListMode</enum>
+       </property>
+       <property name="uniformItemSizes">
+        <bool>true</bool>
+       </property>
+       <property name="wordWrap">
+        <bool>true</bool>
+       </property>
+       <property name="currentRow">
+        <number>-1</number>
+       </property>
+       <item>
+        <property name="text">
+         <string>Facebook</string>
+        </property>
+        <property name="icon">
+         <iconset>
+          <normalon>:/facebook</normalon>
+         </iconset>
+        </property>
+       </item>
+      </widget>
+     </item>
+     <item>
+      <widget class="QStackedWidget" name="stackedWidget">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="MinimumExpanding" vsizetype="MinimumExpanding">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
+       <property name="currentIndex">
+        <number>0</number>
+       </property>
+       <widget class="QWidget" name="facebook_page">
+        <property name="sizePolicy">
+         <sizepolicy hsizetype="Preferred" vsizetype="MinimumExpanding">
+          <horstretch>0</horstretch>
+          <verstretch>0</verstretch>
+         </sizepolicy>
+        </property>
+        <layout class="QVBoxLayout" name="fbLayout" stretch="0">
+         <property name="spacing">
+          <number>5</number>
+         </property>
+         <property name="leftMargin">
+          <number>5</number>
+         </property>
+         <property name="topMargin">
+          <number>5</number>
+         </property>
+         <property name="rightMargin">
+          <number>5</number>
+         </property>
+         <property name="bottomMargin">
+          <number>5</number>
+         </property>
+         <item>
+          <widget class="QWidget" name="widget" native="true">
+           <layout class="QVBoxLayout" name="verticalLayout_9">
+            <item>
+             <widget class="QLabel" name="FBLabel">
+              <property name="sizePolicy">
+               <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
+                <horstretch>0</horstretch>
+                <verstretch>0</verstretch>
+               </sizepolicy>
+              </property>
+              <property name="text">
+               <string>Connect to facebook text placeholder</string>
+              </property>
+             </widget>
+            </item>
+            <item>
+             <widget class="QWidget" name="fbWebviewContainer" native="true">
+              <layout class="QVBoxLayout" name="verticalLayout_10"/>
+             </widget>
+            </item>
+            <item>
+             <widget class="QPushButton" name="fbDisconnect">
+              <property name="text">
+               <string>Disconnect</string>
+              </property>
+             </widget>
+            </item>
+           </layout>
+          </widget>
+         </item>
+        </layout>
+       </widget>
+      </widget>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <widget class="QDialogButtonBox" name="buttonBox">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+     <property name="standardButtons">
+      <set>QDialogButtonBox::Apply|QDialogButtonBox::Discard|QDialogButtonBox::Ok</set>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>accepted()</signal>
+   <receiver>PreferencesDialog</receiver>
+   <slot>accept()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>264</x>
+     <y>720</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>157</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>rejected()</signal>
+   <receiver>PreferencesDialog</receiver>
+   <slot>reject()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>332</x>
+     <y>720</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>286</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>listWidget</sender>
+   <signal>currentRowChanged(int)</signal>
+   <receiver>stackedWidget</receiver>
+   <slot>setCurrentIndex(int)</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>37</x>
+     <y>97</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>282</x>
+     <y>18</y>
+    </hint>
+   </hints>
+  </connection>
+ </connections>
+</ui>
diff --git a/desktop-widgets/preferences/CMakeLists.txt b/desktop-widgets/preferences/CMakeLists.txt
new file mode 100644
index 000000000..4e506ed73
--- /dev/null
+++ b/desktop-widgets/preferences/CMakeLists.txt
@@ -0,0 +1,27 @@
+# the profile widget
+include_directories(.
+	${CMAKE_CURRENT_BINARY_DIR}
+	${CMAKE_BINARY_DIR}
+)
+
+file(GLOB SUBSURFACE_PREFERENCES_UI *.ui)
+qt5_wrap_ui(SUBSURFACE_PREFERENCES_UI_HDRS ${SUBSURFACE_PREFERENCES_UI})
+
+source_group("Subsurface Interface Files" FILES ${SUBSURFACE_PREFERENCES_UI})
+
+set(SUBSURFACE_PREFERENCES_LIB_SRCS
+	abstractpreferenceswidget.cpp
+	preferencesdialog.cpp
+	preferences_language.cpp
+	preferences_georeference.cpp
+	preferences_defaults.cpp
+	preferences_units.cpp
+	preferences_graph.cpp
+	preferences_network.cpp
+)
+
+source_group("Subsurface Preferences" FILES ${SUBSURFACE_PREFERENCES_LIB_SRCS})
+
+add_library(subsurface_desktop_preferences STATIC ${SUBSURFACE_PREFERENCES_LIB_SRCS} ${SUBSURFACE_PREFERENCES_UI_HDRS})
+target_link_libraries(subsurface_desktop_preferences ${QT_LIBRARIES})
+
diff --git a/desktop-widgets/preferences/abstractpreferenceswidget.cpp b/desktop-widgets/preferences/abstractpreferenceswidget.cpp
new file mode 100644
index 000000000..9334c74ed
--- /dev/null
+++ b/desktop-widgets/preferences/abstractpreferenceswidget.cpp
@@ -0,0 +1,21 @@
+#include "abstractpreferenceswidget.h"
+
+AbstractPreferencesWidget::AbstractPreferencesWidget(const QString& name, const QIcon& icon, float positionHeight)
+: QWidget(), _name(name), _icon(icon), _positionHeight(positionHeight)
+{
+}
+
+QIcon AbstractPreferencesWidget::icon() const
+{
+	return _icon;
+}
+
+QString AbstractPreferencesWidget::name() const
+{
+	return _name;
+}
+
+float AbstractPreferencesWidget::positionHeight() const
+{
+	return _positionHeight;
+}
diff --git a/desktop-widgets/preferences/abstractpreferenceswidget.h b/desktop-widgets/preferences/abstractpreferenceswidget.h
new file mode 100644
index 000000000..2f607c4c9
--- /dev/null
+++ b/desktop-widgets/preferences/abstractpreferenceswidget.h
@@ -0,0 +1,27 @@
+#ifndef ABSTRACTPREFERENCESWIDGET_H
+#define ABSTRACTPREFERENCESWIDGET_H
+
+#include <QIcon>
+#include <QWidget>
+
+class AbstractPreferencesWidget : public QWidget {
+	Q_OBJECT
+public:
+	AbstractPreferencesWidget(const QString& name, const QIcon& icon, float positionHeight);
+	QIcon icon() const;
+	QString name() const;
+	float positionHeight() const;
+
+	/* gets the values from the preferences and should set the correct values in
+	 * the interface */
+	virtual void refreshSettings() = 0;
+
+	/* gets the values from the interface and set in the preferences object. */
+	virtual void syncSettings() = 0;
+
+private:
+	QIcon _icon;
+	QString _name;
+	float _positionHeight;
+};
+#endif
\ No newline at end of file
diff --git a/desktop-widgets/preferences/preferences_defaults.cpp b/desktop-widgets/preferences/preferences_defaults.cpp
new file mode 100644
index 000000000..45888ebec
--- /dev/null
+++ b/desktop-widgets/preferences/preferences_defaults.cpp
@@ -0,0 +1,103 @@
+#include "preferences_defaults.h"
+#include "ui_preferences_defaults.h"
+#include "dive.h"
+#include "subsurface-core/prefs-macros.h"
+
+#include <QSettings>
+#include <QFileDialog>
+
+PreferencesDefaults::PreferencesDefaults(): AbstractPreferencesWidget(tr("Defaults"), QIcon(":defaults"), 0 ), ui(new Ui::PreferencesDefaults())
+{
+	ui->setupUi(this);
+}
+
+PreferencesDefaults::~PreferencesDefaults()
+{
+	delete ui;
+}
+
+void PreferencesDefaults::on_chooseFile_clicked()
+{
+	QFileInfo fi(system_default_filename());
+	QString choosenFileName = QFileDialog::getOpenFileName(this, tr("Open default log file"), fi.absolutePath(), tr("Subsurface XML files (*.ssrf *.xml *.XML)"));
+
+	if (!choosenFileName.isEmpty())
+		ui->defaultfilename->setText(choosenFileName);
+}
+
+void PreferencesDefaults::on_btnUseDefaultFile_toggled(bool toggle)
+{
+	if (toggle) {
+		ui->defaultfilename->setText(system_default_filename());
+		ui->defaultfilename->setEnabled(false);
+	} else {
+		ui->defaultfilename->setEnabled(true);
+	}
+}
+
+void PreferencesDefaults::on_localDefaultFile_toggled(bool toggle)
+{
+	ui->defaultfilename->setEnabled(toggle);
+	ui->btnUseDefaultFile->setEnabled(toggle);
+	ui->chooseFile->setEnabled(toggle);
+}
+
+void PreferencesDefaults::refreshSettings()
+{
+	ui->font->setCurrentFont(QString(prefs.divelist_font));
+	ui->fontsize->setValue(prefs.font_size);
+	ui->defaultfilename->setText(prefs.default_filename);
+	ui->noDefaultFile->setChecked(prefs.default_file_behavior == NO_DEFAULT_FILE);
+	ui->cloudDefaultFile->setChecked(prefs.default_file_behavior == CLOUD_DEFAULT_FILE);
+	ui->localDefaultFile->setChecked(prefs.default_file_behavior == LOCAL_DEFAULT_FILE);
+
+	ui->default_cylinder->clear();
+	for (int i = 0; tank_info[i].name != NULL; i++) {
+		ui->default_cylinder->addItem(tank_info[i].name);
+		if (prefs.default_cylinder && strcmp(tank_info[i].name, prefs.default_cylinder) == 0)
+			ui->default_cylinder->setCurrentIndex(i);
+	}
+	ui->displayinvalid->setChecked(prefs.display_invalid_dives);
+	ui->velocitySlider->setValue(prefs.animation_speed);
+	ui->btnUseDefaultFile->setChecked(prefs.use_default_file);
+
+	if (prefs.cloud_verification_status == CS_VERIFIED) {
+		ui->cloudDefaultFile->setEnabled(true);
+	} else {
+		if (ui->cloudDefaultFile->isChecked())
+			ui->noDefaultFile->setChecked(true);
+		ui->cloudDefaultFile->setEnabled(false);
+	}
+
+	ui->defaultfilename->setEnabled(prefs.default_file_behavior == LOCAL_DEFAULT_FILE);
+	ui->btnUseDefaultFile->setEnabled(prefs.default_file_behavior == LOCAL_DEFAULT_FILE);
+	ui->chooseFile->setEnabled(prefs.default_file_behavior == LOCAL_DEFAULT_FILE);
+}
+
+void PreferencesDefaults::syncSettings()
+{
+	QSettings s;
+	s.beginGroup("GeneralSettings");
+	s.setValue("default_filename", ui->defaultfilename->text());
+	s.setValue("default_cylinder", ui->default_cylinder->currentText());
+	s.setValue("use_default_file", ui->btnUseDefaultFile->isChecked());
+	if (ui->noDefaultFile->isChecked())
+		s.setValue("default_file_behavior", NO_DEFAULT_FILE);
+	else if (ui->localDefaultFile->isChecked())
+		s.setValue("default_file_behavior", LOCAL_DEFAULT_FILE);
+	else if (ui->cloudDefaultFile->isChecked())
+		s.setValue("default_file_behavior", CLOUD_DEFAULT_FILE);
+	s.endGroup();
+
+	s.beginGroup("Display");
+	SAVE_OR_REMOVE_SPECIAL("divelist_font", system_divelist_default_font, ui->font->currentFont().toString(), ui->font->currentFont());
+	SAVE_OR_REMOVE("font_size", system_divelist_default_font_size, ui->fontsize->value());
+	s.setValue("displayinvalid", ui->displayinvalid->isChecked());
+	s.endGroup();
+	s.sync();
+
+		// Animation
+	s.beginGroup("Animations");
+	s.setValue("animation_speed", ui->velocitySlider->value());
+	s.endGroup();
+}
diff --git a/desktop-widgets/preferences/preferences_defaults.h b/desktop-widgets/preferences/preferences_defaults.h
new file mode 100644
index 000000000..c72be31a6
--- /dev/null
+++ b/desktop-widgets/preferences/preferences_defaults.h
@@ -0,0 +1,28 @@
+#ifndef PREFERENCES_DEFAULTS_H
+#define PREFERENCES_DEFAULTS_H
+
+#include "abstractpreferenceswidget.h"
+#include "subsurface-core/pref.h"
+
+namespace Ui {
+	class PreferencesDefaults;
+}
+
+class PreferencesDefaults : public AbstractPreferencesWidget {
+	Q_OBJECT
+public:
+	PreferencesDefaults();
+	virtual ~PreferencesDefaults();
+	virtual void refreshSettings();
+	virtual void syncSettings();
+public slots:
+	void on_chooseFile_clicked();
+	void on_btnUseDefaultFile_toggled(bool toggled);
+	void on_localDefaultFile_toggled(bool toggled);
+
+private:
+	Ui::PreferencesDefaults *ui;
+};
+
+
+#endif
\ No newline at end of file
diff --git a/desktop-widgets/preferences/preferences_defaults.ui b/desktop-widgets/preferences/preferences_defaults.ui
new file mode 100644
index 000000000..632e82763
--- /dev/null
+++ b/desktop-widgets/preferences/preferences_defaults.ui
@@ -0,0 +1,251 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>PreferencesDefaults</class>
+ <widget class="QWidget" name="PreferencesDefaults">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>555</width>
+    <height>558</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Form</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <widget class="QGroupBox" name="groupBox_2">
+     <property name="title">
+      <string>Lists and tables</string>
+     </property>
+     <layout class="QHBoxLayout" name="horizontalLayout_11">
+      <property name="margin">
+       <number>5</number>
+      </property>
+      <item>
+       <widget class="QLabel" name="label_7">
+        <property name="text">
+         <string>Font</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QFontComboBox" name="font"/>
+      </item>
+      <item>
+       <widget class="QLabel" name="label_8">
+        <property name="text">
+         <string>Font size</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QDoubleSpinBox" name="fontsize"/>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QGroupBox" name="groupBox_3">
+     <property name="title">
+      <string>Dives</string>
+     </property>
+     <layout class="QFormLayout" name="formLayout">
+      <property name="horizontalSpacing">
+       <number>5</number>
+      </property>
+      <property name="verticalSpacing">
+       <number>5</number>
+      </property>
+      <property name="margin">
+       <number>5</number>
+      </property>
+      <item row="0" column="0">
+       <widget class="QLabel" name="defaultDiveLogFileLabel">
+        <property name="text">
+         <string>Default dive log file</string>
+        </property>
+       </widget>
+      </item>
+      <item row="0" column="1">
+       <layout class="QHBoxLayout" name="defaultFileBehaviorLayout">
+        <item>
+         <widget class="QRadioButton" name="noDefaultFile">
+          <property name="text">
+           <string>No default file</string>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <widget class="QRadioButton" name="localDefaultFile">
+          <property name="text">
+           <string>&amp;Local default file</string>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <widget class="QRadioButton" name="cloudDefaultFile">
+          <property name="text">
+           <string>Clo&amp;ud storage default file</string>
+          </property>
+         </widget>
+        </item>
+       </layout>
+      </item>
+      <item row="1" column="0">
+       <widget class="QLabel" name="label_9">
+        <property name="text">
+         <string>Local dive log file</string>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="1">
+       <layout class="QHBoxLayout" name="horizontalLayout_3b">
+        <item>
+         <widget class="QLineEdit" name="defaultfilename"/>
+        </item>
+        <item>
+         <widget class="QToolButton" name="btnUseDefaultFile">
+          <property name="text">
+           <string>Use default</string>
+          </property>
+          <property name="checkable">
+           <bool>true</bool>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <widget class="QToolButton" name="chooseFile">
+          <property name="text">
+           <string>...</string>
+          </property>
+         </widget>
+        </item>
+       </layout>
+      </item>
+      <item row="2" column="0">
+       <widget class="QLabel" name="label_10">
+        <property name="text">
+         <string>Display invalid</string>
+        </property>
+       </widget>
+      </item>
+      <item row="2" column="1">
+       <widget class="QCheckBox" name="displayinvalid">
+        <property name="text">
+         <string/>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QGroupBox" name="groupBox_6">
+     <property name="title">
+      <string>Default cylinder</string>
+     </property>
+     <layout class="QFormLayout" name="formLayout_6">
+      <property name="horizontalSpacing">
+       <number>5</number>
+      </property>
+      <property name="verticalSpacing">
+       <number>5</number>
+      </property>
+      <property name="margin">
+       <number>5</number>
+      </property>
+      <item row="0" column="0">
+       <widget class="QLabel" name="label_11">
+        <property name="text">
+         <string>Use default cylinder</string>
+        </property>
+       </widget>
+      </item>
+      <item row="0" column="1">
+       <layout class="QHBoxLayout" name="horizontalLayout_3">
+        <item>
+         <widget class="QComboBox" name="default_cylinder"/>
+        </item>
+       </layout>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QGroupBox" name="groupBox_7">
+     <property name="title">
+      <string>Animations</string>
+     </property>
+     <layout class="QHBoxLayout" name="horizontalLayout_7">
+      <property name="margin">
+       <number>5</number>
+      </property>
+      <item>
+       <widget class="QLabel" name="label_15">
+        <property name="text">
+         <string>Speed</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QSlider" name="velocitySlider">
+        <property name="maximum">
+         <number>500</number>
+        </property>
+        <property name="orientation">
+         <enum>Qt::Horizontal</enum>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QSpinBox" name="velocitySpinBox">
+        <property name="maximum">
+         <number>500</number>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QGroupBox" name="groupBox_9">
+     <property name="title">
+      <string>Clear all settings</string>
+     </property>
+     <layout class="QVBoxLayout" name="verticalLayout_7b">
+      <property name="spacing">
+       <number>5</number>
+      </property>
+      <property name="margin">
+       <number>5</number>
+      </property>
+      <item>
+       <widget class="QPushButton" name="resetSettings">
+        <property name="text">
+         <string>Reset all settings to their default value</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <spacer name="verticalSpacer_2">
+     <property name="orientation">
+      <enum>Qt::Vertical</enum>
+     </property>
+     <property name="sizeHint" stdset="0">
+      <size>
+       <width>0</width>
+       <height>195</height>
+      </size>
+     </property>
+    </spacer>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>
diff --git a/desktop-widgets/preferences/preferences_georeference.cpp b/desktop-widgets/preferences/preferences_georeference.cpp
new file mode 100644
index 000000000..7e8ccec9d
--- /dev/null
+++ b/desktop-widgets/preferences/preferences_georeference.cpp
@@ -0,0 +1,45 @@
+#include "preferences_georeference.h"
+#include "ui_prefs_georeference.h"
+#include "prefs-macros.h"
+#include "qthelper.h"
+#include "qt-models/divelocationmodel.h"
+
+#include <ctime>
+#include <QSettings>
+
+PreferencesGeoreference::PreferencesGeoreference() : AbstractPreferencesWidget(tr("Georeference"), QIcon(":/georeference"), 9)
+{
+	ui = new Ui::PreferencesGeoreference();
+	ui->setupUi(this);
+	ui->first_item->setModel(GeoReferencingOptionsModel::instance());
+	ui->second_item->setModel(GeoReferencingOptionsModel::instance());
+	ui->third_item->setModel(GeoReferencingOptionsModel::instance());
+}
+
+PreferencesGeoreference::~PreferencesGeoreference()
+{
+	delete ui;
+}
+
+void PreferencesGeoreference::refreshSettings()
+{
+	ui->enable_geocoding->setChecked(prefs.geocoding.enable_geocoding);
+	ui->parse_without_gps->setChecked(prefs.geocoding.parse_dive_without_gps);
+	ui->tag_existing_dives->setChecked(prefs.geocoding.tag_existing_dives);
+	ui->first_item->setCurrentIndex(prefs.geocoding.category[0]);
+	ui->second_item->setCurrentIndex(prefs.geocoding.category[1]);
+	ui->third_item->setCurrentIndex(prefs.geocoding.category[2]);
+}
+
+void PreferencesGeoreference::syncSettings()
+{
+	QSettings s;
+	s.beginGroup("geocoding");
+	s.setValue("enable_geocoding", ui->enable_geocoding->isChecked());
+	s.setValue("parse_dives_without_gps", ui->parse_without_gps->isChecked());
+	s.setValue("tag_existing_dives", ui->tag_existing_dives->isChecked());
+	s.setValue("cat0", ui->first_item->currentIndex());
+	s.setValue("cat1", ui->second_item->currentIndex());
+	s.setValue("cat2", ui->third_item->currentIndex());
+	s.endGroup();
+}
\ No newline at end of file
diff --git a/desktop-widgets/preferences/preferences_georeference.h b/desktop-widgets/preferences/preferences_georeference.h
new file mode 100644
index 000000000..5dd4bc445
--- /dev/null
+++ b/desktop-widgets/preferences/preferences_georeference.h
@@ -0,0 +1,21 @@
+#ifndef PREFERENCES_GEOREFERENCE_H
+#define PREFERENCES_GEOREFERENCE_H
+
+#include "abstractpreferenceswidget.h"
+
+namespace Ui {
+	class PreferencesGeoreference;
+}
+
+class PreferencesGeoreference : public AbstractPreferencesWidget {
+	Q_OBJECT
+public:
+	PreferencesGeoreference();
+	virtual ~PreferencesGeoreference();
+	virtual void refreshSettings();
+	virtual void syncSettings();
+private:
+	Ui::PreferencesGeoreference *ui;
+};
+
+#endif
\ No newline at end of file
diff --git a/desktop-widgets/preferences/preferences_graph.cpp b/desktop-widgets/preferences/preferences_graph.cpp
new file mode 100644
index 000000000..327557692
--- /dev/null
+++ b/desktop-widgets/preferences/preferences_graph.cpp
@@ -0,0 +1,77 @@
+#include "preferences_graph.h"
+#include "ui_preferences_graph.h"
+#include "subsurface-core/prefs-macros.h"
+
+#include <QSettings>
+#include <QMessageBox>
+
+#include "qt-models/models.h"
+
+PreferencesGraph::PreferencesGraph() : AbstractPreferencesWidget(tr("Graph"), QIcon(":graph"), 5)
+{
+	ui = new Ui::PreferencesGraph();
+	ui->setupUi(this);
+}
+
+PreferencesGraph::~PreferencesGraph()
+{
+	delete ui;
+}
+
+void PreferencesGraph::refreshSettings()
+{
+	ui->pheThreshold->setValue(prefs.pp_graphs.phe_threshold);
+	ui->po2Threshold->setValue(prefs.pp_graphs.po2_threshold);
+	ui->pn2Threshold->setValue(prefs.pp_graphs.pn2_threshold);
+	ui->maxpo2->setValue(prefs.modpO2);
+	ui->red_ceiling->setChecked(prefs.redceiling);
+
+	ui->gflow->setValue(prefs.gflow);
+	ui->gfhigh->setValue(prefs.gfhigh);
+	ui->gf_low_at_maxdepth->setChecked(prefs.gf_low_at_maxdepth);
+	ui->show_ccr_setpoint->setChecked(prefs.show_ccr_setpoint);
+	ui->show_ccr_sensors->setChecked(prefs.show_ccr_sensors);
+	ui->defaultSetpoint->setValue((double)prefs.defaultsetpoint / 1000.0);
+	ui->psro2rate->setValue(prefs.o2consumption / 1000.0);
+	ui->pscrfactor->setValue(rint(1000.0 / prefs.pscr_ratio));
+
+	ui->display_unused_tanks->setChecked(prefs.display_unused_tanks);
+	ui->show_average_depth->setChecked(prefs.show_average_depth);
+}
+
+void PreferencesGraph::syncSettings()
+{
+	QSettings s;
+
+	s.beginGroup("GeneralSettings");
+	s.setValue("defaultsetpoint", rint(ui->defaultSetpoint->value() * 1000.0));
+	s.setValue("o2consumption", rint(ui->psro2rate->value() *1000.0));
+	s.setValue("pscr_ratio", rint(1000.0 / ui->pscrfactor->value()));
+	s.endGroup();
+
+	s.beginGroup("TecDetails");
+	SAVE_OR_REMOVE("phethreshold", default_prefs.pp_graphs.phe_threshold, ui->pheThreshold->value());
+	SAVE_OR_REMOVE("po2threshold", default_prefs.pp_graphs.po2_threshold, ui->po2Threshold->value());
+	SAVE_OR_REMOVE("pn2threshold", default_prefs.pp_graphs.pn2_threshold, ui->pn2Threshold->value());
+	SAVE_OR_REMOVE("modpO2", default_prefs.modpO2, ui->maxpo2->value());
+	SAVE_OR_REMOVE("redceiling", default_prefs.redceiling, ui->red_ceiling->isChecked());
+	SAVE_OR_REMOVE("gflow", default_prefs.gflow, ui->gflow->value());
+	SAVE_OR_REMOVE("gfhigh", default_prefs.gfhigh, ui->gfhigh->value());
+	SAVE_OR_REMOVE("gf_low_at_maxdepth", default_prefs.gf_low_at_maxdepth, ui->gf_low_at_maxdepth->isChecked());
+	SAVE_OR_REMOVE("show_ccr_setpoint", default_prefs.show_ccr_setpoint, ui->show_ccr_setpoint->isChecked());
+	SAVE_OR_REMOVE("show_ccr_sensors", default_prefs.show_ccr_sensors, ui->show_ccr_sensors->isChecked());
+	SAVE_OR_REMOVE("display_unused_tanks", default_prefs.display_unused_tanks, ui->display_unused_tanks->isChecked());
+	SAVE_OR_REMOVE("show_average_depth", default_prefs.show_average_depth, ui->show_average_depth->isChecked());
+	s.endGroup();
+}
+
+#define DANGER_GF (gf > 100) ? "* { color: red; }" : ""
+void PreferencesGraph::on_gflow_valueChanged(int gf)
+{
+	ui->gflow->setStyleSheet(DANGER_GF);
+}
+void PreferencesGraph::on_gfhigh_valueChanged(int gf)
+{
+	ui->gfhigh->setStyleSheet(DANGER_GF);
+}
+#undef DANGER_GF
\ No newline at end of file
diff --git a/desktop-widgets/preferences/preferences_graph.h b/desktop-widgets/preferences/preferences_graph.h
new file mode 100644
index 000000000..ca40c0a92
--- /dev/null
+++ b/desktop-widgets/preferences/preferences_graph.h
@@ -0,0 +1,27 @@
+#ifndef PREFERENCES_GRAPH_H
+#define PREFERENCES_GRAPH_H
+
+#include "abstractpreferenceswidget.h"
+
+namespace Ui {
+	class PreferencesGraph;
+}
+
+class PreferencesGraph : public AbstractPreferencesWidget {
+	Q_OBJECT
+public:
+	PreferencesGraph();
+	virtual ~PreferencesGraph();
+	virtual void refreshSettings();
+	virtual void syncSettings();
+
+private slots:
+	void on_gflow_valueChanged(int gf);
+	void on_gfhigh_valueChanged(int gf);
+
+private:
+	Ui::PreferencesGraph *ui;
+
+};
+
+#endif
\ No newline at end of file
diff --git a/desktop-widgets/preferences/preferences_graph.ui b/desktop-widgets/preferences/preferences_graph.ui
new file mode 100644
index 000000000..bdbbc75d3
--- /dev/null
+++ b/desktop-widgets/preferences/preferences_graph.ui
@@ -0,0 +1,268 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>PreferencesGraph</class>
+ <widget class="QWidget" name="PreferencesGraph">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>505</width>
+    <height>623</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Form</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <widget class="QGroupBox" name="groupBox_4">
+     <property name="title">
+      <string>Show</string>
+     </property>
+     <layout class="QGridLayout" name="gridLayout">
+      <item row="0" column="0">
+       <widget class="QLabel" name="label_12">
+        <property name="enabled">
+         <bool>true</bool>
+        </property>
+        <property name="text">
+         <string>Threshold when showing pO₂</string>
+        </property>
+       </widget>
+      </item>
+      <item row="0" column="1">
+       <widget class="QDoubleSpinBox" name="po2Threshold">
+        <property name="enabled">
+         <bool>true</bool>
+        </property>
+        <property name="singleStep">
+         <double>0.100000000000000</double>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="0">
+       <widget class="QLabel" name="label_13">
+        <property name="enabled">
+         <bool>true</bool>
+        </property>
+        <property name="text">
+         <string>Threshold when showing pN₂</string>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="1">
+       <widget class="QDoubleSpinBox" name="pn2Threshold">
+        <property name="enabled">
+         <bool>true</bool>
+        </property>
+        <property name="singleStep">
+         <double>0.100000000000000</double>
+        </property>
+       </widget>
+      </item>
+      <item row="2" column="0">
+       <widget class="QLabel" name="label_17">
+        <property name="enabled">
+         <bool>true</bool>
+        </property>
+        <property name="text">
+         <string>Threshold when showing pHe</string>
+        </property>
+       </widget>
+      </item>
+      <item row="2" column="1">
+       <widget class="QDoubleSpinBox" name="pheThreshold">
+        <property name="enabled">
+         <bool>true</bool>
+        </property>
+        <property name="singleStep">
+         <double>0.100000000000000</double>
+        </property>
+       </widget>
+      </item>
+      <item row="3" column="0">
+       <widget class="QLabel" name="label_18">
+        <property name="enabled">
+         <bool>true</bool>
+        </property>
+        <property name="text">
+         <string>Max pO₂ when showing MOD</string>
+        </property>
+       </widget>
+      </item>
+      <item row="3" column="1">
+       <widget class="QDoubleSpinBox" name="maxpo2">
+        <property name="enabled">
+         <bool>true</bool>
+        </property>
+        <property name="singleStep">
+         <double>0.100000000000000</double>
+        </property>
+       </widget>
+      </item>
+      <item row="4" column="0" colspan="2">
+       <widget class="QCheckBox" name="red_ceiling">
+        <property name="enabled">
+         <bool>true</bool>
+        </property>
+        <property name="text">
+         <string>Draw dive computer reported ceiling red</string>
+        </property>
+       </widget>
+      </item>
+      <item row="5" column="0" colspan="2">
+       <widget class="QCheckBox" name="display_unused_tanks">
+        <property name="text">
+         <string>Show unused cylinders in Equipment tab</string>
+        </property>
+       </widget>
+      </item>
+      <item row="6" column="0" colspan="2">
+       <widget class="QCheckBox" name="show_average_depth">
+        <property name="text">
+         <string>Show average depth</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QGroupBox" name="groupBox_5">
+     <property name="title">
+      <string>Misc</string>
+     </property>
+     <layout class="QGridLayout" name="gridLayout_2">
+      <item row="0" column="1">
+       <widget class="QSpinBox" name="gflow">
+        <property name="minimum">
+         <number>1</number>
+        </property>
+        <property name="maximum">
+         <number>150</number>
+        </property>
+       </widget>
+      </item>
+      <item row="2" column="1">
+       <widget class="QDoubleSpinBox" name="defaultSetpoint">
+        <property name="suffix">
+         <string>bar</string>
+        </property>
+        <property name="decimals">
+         <number>2</number>
+        </property>
+        <property name="maximum">
+         <double>10.000000000000000</double>
+        </property>
+        <property name="singleStep">
+         <double>0.100000000000000</double>
+        </property>
+       </widget>
+      </item>
+      <item row="2" column="0">
+       <widget class="QLabel" name="label_26">
+        <property name="text">
+         <string>Default CCR set-point for dive planning</string>
+        </property>
+       </widget>
+      </item>
+      <item row="3" column="0">
+       <widget class="QLabel" name="pSCR">
+        <property name="text">
+         <string>pSCR O₂ metabolism rate</string>
+        </property>
+       </widget>
+      </item>
+      <item row="0" column="0">
+       <widget class="QLabel" name="label_19">
+        <property name="text">
+         <string>GFLow</string>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="0">
+       <widget class="QLabel" name="label_20">
+        <property name="text">
+         <string>GFHigh</string>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="1">
+       <widget class="QSpinBox" name="gfhigh">
+        <property name="minimum">
+         <number>1</number>
+        </property>
+        <property name="maximum">
+         <number>150</number>
+        </property>
+       </widget>
+      </item>
+      <item row="3" column="1">
+       <widget class="QDoubleSpinBox" name="psro2rate">
+        <property name="suffix">
+         <string>ℓ/min</string>
+        </property>
+        <property name="decimals">
+         <number>3</number>
+        </property>
+       </widget>
+      </item>
+      <item row="4" column="0">
+       <widget class="QLabel" name="label_28">
+        <property name="text">
+         <string>pSCR ratio</string>
+        </property>
+       </widget>
+      </item>
+      <item row="4" column="1">
+       <widget class="QSpinBox" name="pscrfactor">
+        <property name="suffix">
+         <string/>
+        </property>
+        <property name="prefix">
+         <string>1:</string>
+        </property>
+       </widget>
+      </item>
+      <item row="7" column="0" colspan="2">
+       <widget class="QCheckBox" name="show_ccr_sensors">
+        <property name="text">
+         <string>CCR: show individual O₂ sensor values when viewing pO₂</string>
+        </property>
+       </widget>
+      </item>
+      <item row="6" column="0" colspan="2">
+       <widget class="QCheckBox" name="show_ccr_setpoint">
+        <property name="text">
+         <string>CCR: show setpoints when viewing pO₂</string>
+        </property>
+       </widget>
+      </item>
+      <item row="5" column="0" colspan="2">
+       <widget class="QCheckBox" name="gf_low_at_maxdepth">
+        <property name="text">
+         <string>GFLow at max depth</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <spacer name="verticalSpacer">
+     <property name="orientation">
+      <enum>Qt::Vertical</enum>
+     </property>
+     <property name="sizeHint" stdset="0">
+      <size>
+       <width>20</width>
+       <height>40</height>
+      </size>
+     </property>
+    </spacer>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>
diff --git a/desktop-widgets/preferences/preferences_language.cpp b/desktop-widgets/preferences/preferences_language.cpp
new file mode 100644
index 000000000..31bbd1c20
--- /dev/null
+++ b/desktop-widgets/preferences/preferences_language.cpp
@@ -0,0 +1,72 @@
+#include "preferences_language.h"
+#include "ui_prefs_language.h"
+#include "subsurface-core/helpers.h"
+
+#include <QApplication>
+#include <QSettings>
+#include <QMessageBox>
+#include <QSortFilterProxyModel>
+
+#include "qt-models/models.h"
+
+PreferencesLanguage::PreferencesLanguage() : AbstractPreferencesWidget(tr("Language"), QIcon(":/language"), 4)
+{
+	ui = new Ui::PreferencesLanguage();
+	ui->setupUi(this);
+
+	QSortFilterProxyModel *filterModel = new QSortFilterProxyModel();
+	filterModel->setSourceModel(LanguageModel::instance());
+	filterModel->setFilterCaseSensitivity(Qt::CaseInsensitive);
+	ui->languageDropdown->setModel(filterModel);
+	filterModel->sort(0);
+	connect(ui->languageFilter, &QLineEdit::textChanged,
+			filterModel, &QSortFilterProxyModel::setFilterFixedString);
+}
+
+PreferencesLanguage::~PreferencesLanguage()
+{
+	delete ui;
+}
+
+void PreferencesLanguage::refreshSettings()
+{
+	QSettings s;
+	s.beginGroup("Language");
+	ui->languageSystemDefault->setChecked(s.value("UseSystemLanguage", true).toBool());
+	ui->timeFormatSystemDefault->setChecked(!s.value("time_format_override", false).toBool());
+	ui->dateFormatSystemDefault->setChecked(!s.value("date_format_override", false).toBool());
+	ui->timeFormatEntry->setText(s.value("time_format").toString());
+	ui->dateFormatEntry->setText(s.value("date_format").toString());
+	ui->shortDateFormatEntry->setText(s.value("date_format_short").toString());
+	QAbstractItemModel *m = ui->languageDropdown->model();
+	QModelIndexList languages = m->match(m->index(0, 0), Qt::UserRole, s.value("UiLanguage").toString());
+	if (languages.count())
+		ui->languageDropdown->setCurrentIndex(languages.first().row());
+	s.endGroup();
+}
+
+void PreferencesLanguage::syncSettings()
+{
+	QSettings s;
+	s.beginGroup("Language");
+	bool useSystemLang = s.value("UseSystemLanguage", true).toBool();
+	QAbstractItemModel *m = ui->languageDropdown->model();
+	QString currentText = m->data(m->index(ui->languageDropdown->currentIndex(),0), Qt::UserRole).toString();
+	if (useSystemLang != ui->languageSystemDefault->isChecked() ||
+	    (!useSystemLang && s.value("UiLanguage").toString() != currentText)) {
+		QMessageBox::warning(this, tr("Restart required"),
+			tr("To correctly load a new language you must restart Subsurface."));
+	}
+	s.setValue("UiLanguage", currentText);
+	s.setValue("UseSystemLanguage", ui->languageSystemDefault->isChecked());
+	s.setValue("time_format_override", !ui->timeFormatSystemDefault->isChecked());
+	s.setValue("date_format_override", !ui->dateFormatSystemDefault->isChecked());
+	if (!ui->timeFormatSystemDefault->isChecked())
+		s.setValue("time_format", ui->timeFormatEntry->text());
+	if (!ui->dateFormatSystemDefault->isChecked()) {
+		s.setValue("date_format", ui->dateFormatEntry->text());
+		s.setValue("date_format_short", ui->shortDateFormatEntry->text());
+	}
+	s.endGroup();
+	uiLanguage(NULL);
+}
diff --git a/desktop-widgets/preferences/preferences_language.h b/desktop-widgets/preferences/preferences_language.h
new file mode 100644
index 000000000..43014c0fd
--- /dev/null
+++ b/desktop-widgets/preferences/preferences_language.h
@@ -0,0 +1,21 @@
+#ifndef PREFERENCES_LANGUAGE_H
+#define PREFERENCES_LANGUAGE_H
+
+#include "abstractpreferenceswidget.h"
+
+namespace Ui {
+	class PreferencesLanguage;
+}
+
+class PreferencesLanguage : public AbstractPreferencesWidget {
+	Q_OBJECT
+public:
+	PreferencesLanguage();
+	virtual ~PreferencesLanguage();
+	virtual void refreshSettings();
+	virtual void syncSettings();
+private:
+	Ui::PreferencesLanguage *ui;
+};
+
+#endif
\ No newline at end of file
diff --git a/desktop-widgets/preferences/preferences_network.cpp b/desktop-widgets/preferences/preferences_network.cpp
new file mode 100644
index 000000000..3780a6c91
--- /dev/null
+++ b/desktop-widgets/preferences/preferences_network.cpp
@@ -0,0 +1,172 @@
+#include "preferences_network.h"
+#include "ui_preferences_network.h"
+#include "dive.h"
+#include "subsurfacewebservices.h"
+#include "subsurface-core/prefs-macros.h"
+
+#include <QNetworkProxy>
+#include <QSettings>
+
+PreferencesNetwork::PreferencesNetwork() : AbstractPreferencesWidget(tr("Network"),QIcon(":network"), 9), ui(new Ui::PreferencesNetwork())
+{
+	ui->setupUi(this);
+
+	ui->proxyType->clear();
+	ui->proxyType->addItem(tr("No proxy"), QNetworkProxy::NoProxy);
+	ui->proxyType->addItem(tr("System proxy"), QNetworkProxy::DefaultProxy);
+	ui->proxyType->addItem(tr("HTTP proxy"), QNetworkProxy::HttpProxy);
+	ui->proxyType->addItem(tr("SOCKS proxy"), QNetworkProxy::Socks5Proxy);
+	ui->proxyType->setCurrentIndex(-1);
+
+	connect(ui->proxyType, SIGNAL(currentIndexChanged(int)), this, SLOT(proxyType_changed(int)));
+}
+
+PreferencesNetwork::~PreferencesNetwork()
+{
+	delete ui;
+}
+
+void PreferencesNetwork::refreshSettings()
+{
+	QSettings s;
+
+	ui->proxyHost->setText(prefs.proxy_host);
+	ui->proxyPort->setValue(prefs.proxy_port);
+	ui->proxyAuthRequired->setChecked(prefs.proxy_auth);
+	ui->proxyUsername->setText(prefs.proxy_user);
+	ui->proxyPassword->setText(prefs.proxy_pass);
+	ui->proxyType->setCurrentIndex(ui->proxyType->findData(prefs.proxy_type));
+	ui->cloud_storage_email->setText(prefs.cloud_storage_email);
+	ui->cloud_storage_password->setText(prefs.cloud_storage_password);
+	ui->save_password_local->setChecked(prefs.save_password_local);
+	ui->cloud_background_sync->setChecked(prefs.cloud_background_sync);
+	ui->save_uid_local->setChecked(prefs.save_userid_local);
+	ui->default_uid->setText(s.value("subsurface_webservice_uid").toString().toUpper());
+
+	cloudPinNeeded();
+}
+
+void PreferencesNetwork::syncSettings()
+{
+	QSettings s;
+	s.setValue("subsurface_webservice_uid", ui->default_uid->text().toUpper());
+	set_save_userid_local(ui->save_uid_local->checkState());
+
+	s.beginGroup("Network");
+	s.setValue("proxy_type", ui->proxyType->itemData(ui->proxyType->currentIndex()).toInt());
+	s.setValue("proxy_host", ui->proxyHost->text());
+	s.setValue("proxy_port", ui->proxyPort->value());
+	SB("proxy_auth", ui->proxyAuthRequired);
+	s.setValue("proxy_user", ui->proxyUsername->text());
+	s.setValue("proxy_pass", ui->proxyPassword->text());
+	s.endGroup();
+
+	s.beginGroup("CloudStorage");
+	QString email = ui->cloud_storage_email->text();
+	QString password = ui->cloud_storage_password->text();
+	QString newpassword = ui->cloud_storage_new_passwd->text();
+	if (prefs.cloud_verification_status == CS_VERIFIED && !newpassword.isEmpty()) {
+		// deal with password change
+		if (!email.isEmpty() && !password.isEmpty()) {
+			// connect to backend server to check / create credentials
+			QRegularExpression reg("^[a-zA-Z0-9@.+_-]+$");
+			if (!reg.match(email).hasMatch() || (!password.isEmpty() && !reg.match(password).hasMatch())) {
+				report_error(qPrintable(tr("Cloud storage email and password can only consist of letters, numbers, and '.', '-', '_', and '+'.")));
+			} else {
+				CloudStorageAuthenticate *cloudAuth = new CloudStorageAuthenticate(this);
+				connect(cloudAuth, SIGNAL(finishedAuthenticate()), this, SLOT(cloudPinNeeded()));
+				connect(cloudAuth, SIGNAL(passwordChangeSuccessful()), this, SLOT(passwordUpdateSuccessfull()));
+				QNetworkReply *reply = cloudAuth->backend(email, password, "", newpassword);
+				ui->cloud_storage_new_passwd->setText("");
+				free(prefs.cloud_storage_newpassword);
+				prefs.cloud_storage_newpassword = strdup(qPrintable(newpassword));
+			}
+		}
+	} else if (prefs.cloud_verification_status == CS_UNKNOWN ||
+		   prefs.cloud_verification_status == CS_INCORRECT_USER_PASSWD ||
+		   email != prefs.cloud_storage_email ||
+		   password != prefs.cloud_storage_password) {
+
+		// different credentials - reset verification status
+		prefs.cloud_verification_status = CS_UNKNOWN;
+		if (!email.isEmpty() && !password.isEmpty()) {
+			// connect to backend server to check / create credentials
+			QRegularExpression reg("^[a-zA-Z0-9@.+_-]+$");
+			if (!reg.match(email).hasMatch() || (!password.isEmpty() && !reg.match(password).hasMatch())) {
+				report_error(qPrintable(tr("Cloud storage email and password can only consist of letters, numbers, and '.', '-', '_', and '+'.")));
+			} else {
+				CloudStorageAuthenticate *cloudAuth = new CloudStorageAuthenticate(this);
+				connect(cloudAuth, SIGNAL(finishedAuthenticate()), this, SLOT(cloudPinNeeded()));
+				QNetworkReply *reply = cloudAuth->backend(email, password);
+			}
+		}
+	} else if (prefs.cloud_verification_status == CS_NEED_TO_VERIFY) {
+		QString pin = ui->cloud_storage_pin->text();
+		if (!pin.isEmpty()) {
+			// connect to backend server to check / create credentials
+			QRegularExpression reg("^[a-zA-Z0-9@.+_-]+$");
+			if (!reg.match(email).hasMatch() || !reg.match(password).hasMatch()) {
+				report_error(qPrintable(tr("Cloud storage email and password can only consist of letters, numbers, and '.', '-', '_', and '+'.")));
+			}
+			CloudStorageAuthenticate *cloudAuth = new CloudStorageAuthenticate(this);
+			connect(cloudAuth, SIGNAL(finishedAuthenticate()), this, SLOT(cloudPinNeeded()));
+			QNetworkReply *reply = cloudAuth->backend(email, password, pin);
+		}
+	}
+	SAVE_OR_REMOVE("email", default_prefs.cloud_storage_email, email);
+	SAVE_OR_REMOVE("save_password_local", default_prefs.save_password_local, ui->save_password_local->isChecked());
+	if (ui->save_password_local->isChecked()) {
+		SAVE_OR_REMOVE("password", default_prefs.cloud_storage_password, password);
+	} else {
+		s.remove("password");
+		free(prefs.cloud_storage_password);
+		prefs.cloud_storage_password = strdup(qPrintable(password));
+	}
+	SAVE_OR_REMOVE("cloud_verification_status", default_prefs.cloud_verification_status, prefs.cloud_verification_status);
+	SAVE_OR_REMOVE("cloud_background_sync", default_prefs.cloud_background_sync, ui->cloud_background_sync->isChecked());
+
+	// at this point we intentionally do not have a UI for changing this
+	// it could go into some sort of "advanced setup" or something
+	SAVE_OR_REMOVE("cloud_base_url", default_prefs.cloud_base_url, prefs.cloud_base_url);
+	s.endGroup();
+}
+
+void PreferencesNetwork::cloudPinNeeded()
+{
+	ui->cloud_storage_pin->setEnabled(prefs.cloud_verification_status == CS_NEED_TO_VERIFY);
+	ui->cloud_storage_pin->setVisible(prefs.cloud_verification_status == CS_NEED_TO_VERIFY);
+	ui->cloud_storage_pin_label->setEnabled(prefs.cloud_verification_status == CS_NEED_TO_VERIFY);
+	ui->cloud_storage_pin_label->setVisible(prefs.cloud_verification_status == CS_NEED_TO_VERIFY);
+	ui->cloud_storage_new_passwd->setEnabled(prefs.cloud_verification_status == CS_VERIFIED);
+	ui->cloud_storage_new_passwd->setVisible(prefs.cloud_verification_status == CS_VERIFIED);
+	ui->cloud_storage_new_passwd_label->setEnabled(prefs.cloud_verification_status == CS_VERIFIED);
+	ui->cloud_storage_new_passwd_label->setVisible(prefs.cloud_verification_status == CS_VERIFIED);
+	if (prefs.cloud_verification_status == CS_VERIFIED) {
+		ui->cloudStorageGroupBox->setTitle(tr("Subsurface cloud storage (credentials verified)"));
+	} else {
+		ui->cloudStorageGroupBox->setTitle(tr("Subsurface cloud storage"));
+	}
+	//TODO: Do not call mainWindow here. Verify things on SettingsChanged.
+	//MainWindow::instance()->enableDisableCloudActions();
+}
+
+void PreferencesNetwork::proxyType_changed(int idx)
+{
+	if (idx == -1) {
+		return;
+	}
+
+	int proxyType = ui->proxyType->itemData(idx).toInt();
+	bool hpEnabled = (proxyType == QNetworkProxy::Socks5Proxy || proxyType == QNetworkProxy::HttpProxy);
+	ui->proxyHost->setEnabled(hpEnabled);
+	ui->proxyPort->setEnabled(hpEnabled);
+	ui->proxyAuthRequired->setEnabled(hpEnabled);
+	ui->proxyUsername->setEnabled(hpEnabled & ui->proxyAuthRequired->isChecked());
+	ui->proxyPassword->setEnabled(hpEnabled & ui->proxyAuthRequired->isChecked());
+	ui->proxyAuthRequired->setChecked(ui->proxyAuthRequired->isChecked());
+}
+
+void PreferencesNetwork::passwordUpdateSuccessfull()
+{
+	ui->cloud_storage_password->setText(prefs.cloud_storage_password);
+}
\ No newline at end of file
diff --git a/desktop-widgets/preferences/preferences_network.h b/desktop-widgets/preferences/preferences_network.h
new file mode 100644
index 000000000..3e17d51b0
--- /dev/null
+++ b/desktop-widgets/preferences/preferences_network.h
@@ -0,0 +1,28 @@
+#ifndef PREFERENCES_NETWORK_H
+#define PREFERENCES_NETWORK_H
+
+#include "abstractpreferenceswidget.h"
+
+namespace Ui {
+	class PreferencesNetwork;
+}
+
+class PreferencesNetwork : public AbstractPreferencesWidget {
+	Q_OBJECT
+
+public:
+	PreferencesNetwork();
+	virtual ~PreferencesNetwork();
+	virtual void refreshSettings();
+	virtual void syncSettings();
+
+public slots:
+	void proxyType_changed(int i);
+
+private:
+	Ui::PreferencesNetwork *ui;
+	void cloudPinNeeded();
+	void passwordUpdateSuccessfull();
+};
+
+#endif
\ No newline at end of file
diff --git a/desktop-widgets/preferences/preferences_network.ui b/desktop-widgets/preferences/preferences_network.ui
new file mode 100644
index 000000000..8bb9bf9a0
--- /dev/null
+++ b/desktop-widgets/preferences/preferences_network.ui
@@ -0,0 +1,293 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>PreferencesNetwork</class>
+ <widget class="QWidget" name="PreferencesNetwork">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>713</width>
+    <height>558</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Form</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <widget class="QGroupBox" name="groupBox_10">
+     <property name="title">
+      <string>Proxy</string>
+     </property>
+     <layout class="QGridLayout" name="gridLayout_2">
+      <item row="1" column="2">
+       <widget class="QLabel" name="label_23">
+        <property name="sizePolicy">
+         <sizepolicy hsizetype="MinimumExpanding" vsizetype="Preferred">
+          <horstretch>0</horstretch>
+          <verstretch>0</verstretch>
+         </sizepolicy>
+        </property>
+        <property name="text">
+         <string>Port</string>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="0">
+       <widget class="QLabel" name="label_22">
+        <property name="text">
+         <string>Host</string>
+        </property>
+       </widget>
+      </item>
+      <item row="0" column="0">
+       <widget class="QLabel" name="label_21">
+        <property name="text">
+         <string>Proxy type</string>
+        </property>
+        <property name="alignment">
+         <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignVCenter</set>
+        </property>
+       </widget>
+      </item>
+      <item row="3" column="0">
+       <widget class="QLabel" name="label_24">
+        <property name="text">
+         <string>Username</string>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="3">
+       <widget class="QSpinBox" name="proxyPort">
+        <property name="sizePolicy">
+         <sizepolicy hsizetype="MinimumExpanding" vsizetype="Fixed">
+          <horstretch>1</horstretch>
+          <verstretch>0</verstretch>
+         </sizepolicy>
+        </property>
+        <property name="maximum">
+         <number>65535</number>
+        </property>
+        <property name="value">
+         <number>80</number>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="1">
+       <widget class="QLineEdit" name="proxyHost">
+        <property name="sizePolicy">
+         <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
+          <horstretch>2</horstretch>
+          <verstretch>0</verstretch>
+         </sizepolicy>
+        </property>
+        <property name="maxLength">
+         <number>64</number>
+        </property>
+       </widget>
+      </item>
+      <item row="0" column="1" colspan="3">
+       <widget class="QComboBox" name="proxyType"/>
+      </item>
+      <item row="2" column="1" colspan="3">
+       <widget class="QCheckBox" name="proxyAuthRequired">
+        <property name="layoutDirection">
+         <enum>Qt::LeftToRight</enum>
+        </property>
+        <property name="text">
+         <string>Requires authentication</string>
+        </property>
+       </widget>
+      </item>
+      <item row="3" column="1">
+       <widget class="QLineEdit" name="proxyUsername">
+        <property name="sizePolicy">
+         <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
+          <horstretch>0</horstretch>
+          <verstretch>0</verstretch>
+         </sizepolicy>
+        </property>
+        <property name="maxLength">
+         <number>32</number>
+        </property>
+       </widget>
+      </item>
+      <item row="3" column="2">
+       <widget class="QLabel" name="label_25">
+        <property name="text">
+         <string>Password</string>
+        </property>
+       </widget>
+      </item>
+      <item row="3" column="3">
+       <widget class="QLineEdit" name="proxyPassword">
+        <property name="sizePolicy">
+         <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
+          <horstretch>0</horstretch>
+          <verstretch>0</verstretch>
+         </sizepolicy>
+        </property>
+        <property name="maxLength">
+         <number>32</number>
+        </property>
+        <property name="echoMode">
+         <enum>QLineEdit::Password</enum>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QGroupBox" name="cloudStorageGroupBox">
+     <property name="sizePolicy">
+      <sizepolicy hsizetype="Preferred" vsizetype="Minimum">
+       <horstretch>0</horstretch>
+       <verstretch>0</verstretch>
+      </sizepolicy>
+     </property>
+     <property name="minimumSize">
+      <size>
+       <width>0</width>
+       <height>129</height>
+      </size>
+     </property>
+     <property name="title">
+      <string>Subsurface cloud storage</string>
+     </property>
+     <layout class="QGridLayout" name="gridLayout_3">
+      <item row="0" column="0">
+       <widget class="QLabel" name="label_16b">
+        <property name="toolTip">
+         <string extracomment="Email address used for the Subsurface cloud storage infrastructure"/>
+        </property>
+        <property name="text">
+         <string>Email address</string>
+        </property>
+       </widget>
+      </item>
+      <item row="0" column="1">
+       <widget class="QLabel" name="label_16c">
+        <property name="text">
+         <string>Password</string>
+        </property>
+       </widget>
+      </item>
+      <item row="0" column="2">
+       <widget class="QLabel" name="cloud_storage_pin_label">
+        <property name="text">
+         <string>Verification PIN</string>
+        </property>
+       </widget>
+      </item>
+      <item row="0" column="3">
+       <widget class="QLabel" name="cloud_storage_new_passwd_label">
+        <property name="text">
+         <string>New password</string>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="0">
+       <widget class="QLineEdit" name="cloud_storage_email">
+        <property name="toolTip">
+         <string extracomment="Email address used for the Subsurface cloud storage infrastructure"/>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="1">
+       <widget class="QLineEdit" name="cloud_storage_password">
+        <property name="echoMode">
+         <enum>QLineEdit::Password</enum>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="2">
+       <widget class="QLineEdit" name="cloud_storage_pin">
+        <property name="toolTip">
+         <string extracomment="One time verification PIN for Subsurface cloud storage infrastructure"/>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="3">
+       <widget class="QLineEdit" name="cloud_storage_new_passwd">
+        <property name="echoMode">
+         <enum>QLineEdit::Password</enum>
+        </property>
+       </widget>
+      </item>
+      <item row="2" column="0">
+       <widget class="QCheckBox" name="cloud_background_sync">
+        <property name="text">
+         <string>Sync to cloud in the background?</string>
+        </property>
+       </widget>
+      </item>
+      <item row="2" column="1">
+       <widget class="QCheckBox" name="save_password_local">
+        <property name="text">
+         <string>Save Password locally?</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QGroupBox" name="groupBox_8">
+     <property name="title">
+      <string>Subsurface web service</string>
+     </property>
+     <layout class="QVBoxLayout" name="verticalLayout_7">
+      <property name="spacing">
+       <number>5</number>
+      </property>
+      <property name="leftMargin">
+       <number>5</number>
+      </property>
+      <property name="topMargin">
+       <number>5</number>
+      </property>
+      <property name="rightMargin">
+       <number>5</number>
+      </property>
+      <property name="bottomMargin">
+       <number>5</number>
+      </property>
+      <item>
+       <widget class="QLabel" name="label_16">
+        <property name="text">
+         <string>Default user ID</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QLineEdit" name="default_uid"/>
+      </item>
+      <item>
+       <widget class="QCheckBox" name="save_uid_local">
+        <property name="text">
+         <string>Save user ID locally?</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <spacer name="verticalSpacer">
+     <property name="orientation">
+      <enum>Qt::Vertical</enum>
+     </property>
+     <property name="sizeHint" stdset="0">
+      <size>
+       <width>20</width>
+       <height>40</height>
+      </size>
+     </property>
+    </spacer>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>
diff --git a/desktop-widgets/preferences/preferences_units.cpp b/desktop-widgets/preferences/preferences_units.cpp
new file mode 100644
index 000000000..cc77e51bb
--- /dev/null
+++ b/desktop-widgets/preferences/preferences_units.cpp
@@ -0,0 +1,60 @@
+#include "preferences_units.h"
+#include "ui_preferences_units.h"
+#include "prefs-macros.h"
+#include "qthelper.h"
+
+#include <QSettings>
+
+PreferencesUnits::PreferencesUnits(): AbstractPreferencesWidget(tr("Units"),QIcon(":units"),1), ui(new Ui::PreferencesUnits())
+{
+	ui->setupUi(this);
+}
+
+PreferencesUnits::~PreferencesUnits()
+{
+
+}
+
+void PreferencesUnits::refreshSettings()
+{
+	switch(prefs.unit_system) {
+		case METRIC: ui->metric->setChecked(true); break;
+		case IMPERIAL: ui->imperial->setChecked(true); break;
+		default: ui->personalize->setChecked(true); break;
+	}
+
+	ui->gpsTraditional->setChecked(prefs.coordinates_traditional);
+	ui->gpsDecimal->setChecked(!prefs.coordinates_traditional);
+
+	ui->celsius->setChecked(prefs.units.temperature == units::CELSIUS);
+	ui->fahrenheit->setChecked(prefs.units.temperature == units::FAHRENHEIT);
+	ui->meter->setChecked(prefs.units.length == units::METERS);
+	ui->feet->setChecked(prefs.units.length == units::FEET);
+	ui->bar->setChecked(prefs.units.pressure == units::BAR);
+	ui->psi->setChecked(prefs.units.pressure == units::PSI);
+	ui->liter->setChecked(prefs.units.volume == units::LITER);
+	ui->cuft->setChecked(prefs.units.volume == units::CUFT);
+	ui->kg->setChecked(prefs.units.weight == units::KG);
+	ui->lbs->setChecked(prefs.units.weight == units::LBS);
+	ui->units_group->setEnabled(ui->personalize->isChecked());
+
+	ui->vertical_speed_minutes->setChecked(prefs.units.vertical_speed_time == units::MINUTES);
+	ui->vertical_speed_seconds->setChecked(prefs.units.vertical_speed_time == units::SECONDS);
+}
+
+void PreferencesUnits::syncSettings()
+{
+	QSettings s;
+	s.beginGroup("Units");
+	QString unitSystem[] = {"metric", "imperial", "personal"};
+	short unitValue = ui->metric->isChecked() ? METRIC : (ui->imperial->isChecked() ? IMPERIAL : PERSONALIZE);
+	SAVE_OR_REMOVE_SPECIAL("unit_system", default_prefs.unit_system, unitValue, unitSystem[unitValue]);
+	s.setValue("temperature", ui->fahrenheit->isChecked() ? units::FAHRENHEIT : units::CELSIUS);
+	s.setValue("length", ui->feet->isChecked() ? units::FEET : units::METERS);
+	s.setValue("pressure", ui->psi->isChecked() ? units::PSI : units::BAR);
+	s.setValue("volume", ui->cuft->isChecked() ? units::CUFT : units::LITER);
+	s.setValue("weight", ui->lbs->isChecked() ? units::LBS : units::KG);
+	s.setValue("vertical_speed_time", ui->vertical_speed_minutes->isChecked() ? units::MINUTES : units::SECONDS);
+	s.setValue("coordinates", ui->gpsTraditional->isChecked());
+	s.endGroup();
+}
diff --git a/desktop-widgets/preferences/preferences_units.h b/desktop-widgets/preferences/preferences_units.h
new file mode 100644
index 000000000..21a7f4404
--- /dev/null
+++ b/desktop-widgets/preferences/preferences_units.h
@@ -0,0 +1,21 @@
+#ifndef PREFERENCES_UNITS_H
+#define PREFERENCES_UNITS_H
+
+#include "abstractpreferenceswidget.h"
+
+namespace Ui {
+	class PreferencesUnits;
+}
+
+class PreferencesUnits : public AbstractPreferencesWidget {
+	Q_OBJECT
+public:
+	PreferencesUnits();
+	virtual ~PreferencesUnits();
+	virtual void refreshSettings();
+	virtual void syncSettings();
+private:
+	Ui::PreferencesUnits *ui;
+};
+
+#endif
\ No newline at end of file
diff --git a/desktop-widgets/preferences/preferences_units.ui b/desktop-widgets/preferences/preferences_units.ui
new file mode 100644
index 000000000..bb1ffba66
--- /dev/null
+++ b/desktop-widgets/preferences/preferences_units.ui
@@ -0,0 +1,251 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>PreferencesUnits</class>
+ <widget class="QWidget" name="PreferencesUnits">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>400</width>
+    <height>374</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Form</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <widget class="QGroupBox" name="groupBox_units">
+     <property name="title">
+      <string>Unit system</string>
+     </property>
+     <layout class="QHBoxLayout" name="horizontalLayout">
+      <item>
+       <widget class="QLabel" name="label_6">
+        <property name="text">
+         <string>System</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QRadioButton" name="metric">
+        <property name="text">
+         <string>&amp;Metric</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QRadioButton" name="imperial">
+        <property name="text">
+         <string>Imperial</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QRadioButton" name="personalize">
+        <property name="text">
+         <string>Personali&amp;ze</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QGroupBox" name="units_group">
+     <property name="title">
+      <string>Individual settings</string>
+     </property>
+     <property name="checkable">
+      <bool>false</bool>
+     </property>
+     <property name="checked">
+      <bool>false</bool>
+     </property>
+     <layout class="QGridLayout" name="gridLayout">
+      <item row="0" column="0">
+       <widget class="QLabel" name="label">
+        <property name="text">
+         <string>Depth</string>
+        </property>
+       </widget>
+      </item>
+      <item row="0" column="1">
+       <widget class="QRadioButton" name="meter">
+        <property name="text">
+         <string>meter</string>
+        </property>
+       </widget>
+      </item>
+      <item row="0" column="2">
+       <widget class="QRadioButton" name="feet">
+        <property name="text">
+         <string>feet</string>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="0">
+       <widget class="QLabel" name="label_2">
+        <property name="text">
+         <string>Pressure</string>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="1">
+       <widget class="QRadioButton" name="bar">
+        <property name="text">
+         <string>bar</string>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="2">
+       <widget class="QRadioButton" name="psi">
+        <property name="text">
+         <string>psi</string>
+        </property>
+       </widget>
+      </item>
+      <item row="2" column="0">
+       <widget class="QLabel" name="label_3">
+        <property name="text">
+         <string>Volume</string>
+        </property>
+       </widget>
+      </item>
+      <item row="2" column="1">
+       <widget class="QRadioButton" name="liter">
+        <property name="text">
+         <string>&amp;liter</string>
+        </property>
+       </widget>
+      </item>
+      <item row="2" column="2">
+       <widget class="QRadioButton" name="cuft">
+        <property name="text">
+         <string>cu ft</string>
+        </property>
+       </widget>
+      </item>
+      <item row="3" column="0">
+       <widget class="QLabel" name="label_4">
+        <property name="text">
+         <string>Temperature</string>
+        </property>
+       </widget>
+      </item>
+      <item row="3" column="1">
+       <widget class="QRadioButton" name="celsius">
+        <property name="text">
+         <string>celsius</string>
+        </property>
+       </widget>
+      </item>
+      <item row="3" column="2">
+       <widget class="QRadioButton" name="fahrenheit">
+        <property name="text">
+         <string>fahrenheit</string>
+        </property>
+       </widget>
+      </item>
+      <item row="4" column="0">
+       <widget class="QLabel" name="label_5">
+        <property name="text">
+         <string>Weight</string>
+        </property>
+       </widget>
+      </item>
+      <item row="4" column="1">
+       <widget class="QRadioButton" name="kg">
+        <property name="text">
+         <string>kg</string>
+        </property>
+       </widget>
+      </item>
+      <item row="4" column="2">
+       <widget class="QRadioButton" name="lbs">
+        <property name="text">
+         <string>lbs</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QGroupBox" name="groupBox">
+     <property name="title">
+      <string>Time units</string>
+     </property>
+     <layout class="QGridLayout">
+      <item row="0" column="0">
+       <widget class="QLabel" name="label13">
+        <property name="text">
+         <string>Ascent/descent speed denominator</string>
+        </property>
+       </widget>
+      </item>
+      <item row="0" column="1">
+       <widget class="QRadioButton" name="vertical_speed_minutes">
+        <property name="text">
+         <string>Minutes</string>
+        </property>
+       </widget>
+      </item>
+      <item row="0" column="2">
+       <widget class="QRadioButton" name="vertical_speed_seconds">
+        <property name="text">
+         <string>Seconds</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QGroupBox" name="groupBox_11">
+     <property name="title">
+      <string>GPS coordinates</string>
+     </property>
+     <layout class="QHBoxLayout" name="horizontalLayout_12">
+      <item>
+       <widget class="QLabel" name="label_27">
+        <property name="text">
+         <string>Location Display</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QRadioButton" name="gpsTraditional">
+        <property name="text">
+         <string>traditional (dms)</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QRadioButton" name="gpsDecimal">
+        <property name="text">
+         <string>decimal</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <spacer name="verticalSpacer">
+     <property name="orientation">
+      <enum>Qt::Vertical</enum>
+     </property>
+     <property name="sizeHint" stdset="0">
+      <size>
+       <width>0</width>
+       <height>0</height>
+      </size>
+     </property>
+    </spacer>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>
diff --git a/desktop-widgets/preferences/preferencesdialog.cpp b/desktop-widgets/preferences/preferencesdialog.cpp
new file mode 100644
index 000000000..d8798879a
--- /dev/null
+++ b/desktop-widgets/preferences/preferencesdialog.cpp
@@ -0,0 +1,140 @@
+#include "preferencesdialog.h"
+
+#include "abstractpreferenceswidget.h"
+#include "preferences_language.h"
+#include "preferences_georeference.h"
+#include "preferences_defaults.h"
+#include "preferences_units.h"
+#include "preferences_graph.h"
+#include "preferences_network.h"
+
+#include "subsurface-core/qthelper.h"
+
+#include <QVBoxLayout>
+#include <QHBoxLayout>
+#include <QListWidget>
+#include <QStackedWidget>
+#include <QDialogButtonBox>
+#include <QAbstractButton>
+#include <QDebug>
+
+PreferencesDialog* PreferencesDialog::instance()
+{
+	static PreferencesDialog *self = new PreferencesDialog();
+	return self;
+}
+
+void PreferencesDialog::emitSettingsChanged()
+{
+  emit settingsChanged();
+}
+
+PreferencesDialog::PreferencesDialog()
+{
+	loadPreferences(); //TODO: Move this code out of the qthelper.cpp
+
+	pagesList = new QListWidget();
+	pagesStack = new QStackedWidget();
+	buttonBox = new QDialogButtonBox(
+		QDialogButtonBox::Save |
+		QDialogButtonBox::Apply |
+		QDialogButtonBox::Cancel);
+
+	pagesList->setMinimumWidth(120);
+	pagesList->setMaximumWidth(120);
+
+	QHBoxLayout *h = new QHBoxLayout();
+	h->addWidget(pagesList);
+	h->addWidget(pagesStack);
+	QVBoxLayout *v = new QVBoxLayout();
+	v->addLayout(h);
+	v->addWidget(buttonBox);
+
+	setLayout(v);
+
+	addPreferencePage(new PreferencesLanguage());
+	addPreferencePage(new PreferencesGeoreference());
+	addPreferencePage(new PreferencesDefaults());
+	addPreferencePage(new PreferencesUnits());
+	addPreferencePage(new PreferencesGraph());
+	addPreferencePage(new PreferencesNetwork());
+	refreshPages();
+
+	connect(pagesList, &QListWidget::currentRowChanged,
+		pagesStack, &QStackedWidget::setCurrentIndex);
+	connect(buttonBox, &QDialogButtonBox::clicked,
+		this, &PreferencesDialog::buttonClicked);
+}
+
+PreferencesDialog::~PreferencesDialog()
+{
+}
+
+void PreferencesDialog::buttonClicked(QAbstractButton* btn)
+{
+	QDialogButtonBox::ButtonRole role = buttonBox->buttonRole(btn);
+	switch(role) {
+	case QDialogButtonBox::ApplyRole : applyRequested(false); return;
+	case QDialogButtonBox::AcceptRole : applyRequested(true); return;
+	case QDialogButtonBox::RejectRole : cancelRequested(); return;
+	case QDialogButtonBox::ResetRole : defaultsRequested(); return;
+	}
+}
+
+bool abstractpreferenceswidget_lessthan(AbstractPreferencesWidget *p1, AbstractPreferencesWidget *p2)
+{
+	return p1->positionHeight() <= p2->positionHeight();
+}
+
+void PreferencesDialog::addPreferencePage(AbstractPreferencesWidget *page)
+{
+	pages.push_back(page);
+	qSort(pages.begin(), pages.end(), abstractpreferenceswidget_lessthan);
+}
+
+void PreferencesDialog::refreshPages()
+{
+	// Remove things
+	pagesList->clear();
+	while(pagesStack->count()) {
+		QWidget *curr = pagesStack->widget(0);
+		pagesStack->removeWidget(curr);
+		curr->setParent(0);
+	}
+
+	// Readd things.
+	Q_FOREACH(AbstractPreferencesWidget *page, pages) {
+		QListWidgetItem *item = new QListWidgetItem(page->icon(), page->name());
+		pagesList->addItem(item);
+		pagesStack->addWidget(page);
+		page->refreshSettings();
+	}
+}
+
+void PreferencesDialog::applyRequested(bool closeIt)
+{
+	Q_FOREACH(AbstractPreferencesWidget *page, pages) {
+		page->syncSettings();
+	}
+	emit settingsChanged();
+	if (closeIt)
+		accept();
+}
+
+void PreferencesDialog::cancelRequested()
+{
+	Q_FOREACH(AbstractPreferencesWidget *page, pages) {
+		page->refreshSettings();
+	}
+	reject();
+}
+
+void PreferencesDialog::defaultsRequested()
+{
+	prefs = default_prefs;
+	Q_FOREACH(AbstractPreferencesWidget *page, pages) {
+		page->refreshSettings();
+	}
+	emit settingsChanged();
+	accept();
+}
diff --git a/desktop-widgets/preferences/preferencesdialog.h b/desktop-widgets/preferences/preferencesdialog.h
new file mode 100644
index 000000000..5f7f5f979
--- /dev/null
+++ b/desktop-widgets/preferences/preferencesdialog.h
@@ -0,0 +1,35 @@
+#ifndef PREFERENCES_WIDGET_H
+#define PREFERENCES_WIDGET_H
+
+#include <QDialog>
+#include "pref.h"
+
+class AbstractPreferencesWidget;
+class QListWidget;
+class QStackedWidget;
+class QDialogButtonBox;
+class QAbstractButton;
+
+class PreferencesDialog : public QDialog {
+	Q_OBJECT
+public:
+	static PreferencesDialog* instance();
+	virtual ~PreferencesDialog();
+	void addPreferencePage(AbstractPreferencesWidget *page);
+	void refreshPages();
+	void emitSettingsChanged();
+signals:
+	void settingsChanged();
+private:
+	PreferencesDialog();
+	void cancelRequested();
+	void applyRequested(bool closeIt);
+	void defaultsRequested();
+	void buttonClicked(QAbstractButton *btn);
+	QList<AbstractPreferencesWidget*> pages;
+	QListWidget *pagesList;
+	QStackedWidget *pagesStack;
+	QDialogButtonBox *buttonBox;
+};
+
+#endif
diff --git a/desktop-widgets/preferences/prefs_georeference.ui b/desktop-widgets/preferences/prefs_georeference.ui
new file mode 100644
index 000000000..7d4f0907e
--- /dev/null
+++ b/desktop-widgets/preferences/prefs_georeference.ui
@@ -0,0 +1,123 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>PreferencesGeoreference</class>
+ <widget class="QWidget" name="PreferencesGeoreference">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>400</width>
+    <height>300</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Form</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <widget class="QGroupBox" name="groupBox_Geocoding">
+     <property name="title">
+      <string>Dive site geo lookup</string>
+     </property>
+     <layout class="QVBoxLayout" name="verticalLayout_8">
+      <item>
+       <widget class="QCheckBox" name="enable_geocoding">
+        <property name="text">
+         <string>Enable geocoding for dive site management</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QCheckBox" name="parse_without_gps">
+        <property name="text">
+         <string>Parse site without GPS data</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QCheckBox" name="tag_existing_dives">
+        <property name="text">
+         <string>Same format for existing dives</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QGroupBox" name="groupBox_12">
+     <property name="title">
+      <string>Dive Site Layout</string>
+     </property>
+     <layout class="QHBoxLayout" name="horizontalLayout_10">
+      <item>
+       <widget class="QComboBox" name="first_item">
+        <property name="sizePolicy">
+         <sizepolicy hsizetype="MinimumExpanding" vsizetype="Fixed">
+          <horstretch>0</horstretch>
+          <verstretch>0</verstretch>
+         </sizepolicy>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QLabel" name="label_29">
+        <property name="sizePolicy">
+         <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
+          <horstretch>0</horstretch>
+          <verstretch>0</verstretch>
+         </sizepolicy>
+        </property>
+        <property name="text">
+         <string>/</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QComboBox" name="second_item">
+        <property name="sizePolicy">
+         <sizepolicy hsizetype="MinimumExpanding" vsizetype="Fixed">
+          <horstretch>0</horstretch>
+          <verstretch>0</verstretch>
+         </sizepolicy>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QLabel" name="label_30">
+        <property name="text">
+         <string>/</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QComboBox" name="third_item">
+        <property name="sizePolicy">
+         <sizepolicy hsizetype="MinimumExpanding" vsizetype="Fixed">
+          <horstretch>0</horstretch>
+          <verstretch>0</verstretch>
+         </sizepolicy>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <spacer name="verticalSpacer_6">
+     <property name="orientation">
+      <enum>Qt::Vertical</enum>
+     </property>
+     <property name="sizeHint" stdset="0">
+      <size>
+       <width>20</width>
+       <height>109</height>
+      </size>
+     </property>
+    </spacer>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>
diff --git a/desktop-widgets/preferences/prefs_language.ui b/desktop-widgets/preferences/prefs_language.ui
new file mode 100644
index 000000000..af3a0ad87
--- /dev/null
+++ b/desktop-widgets/preferences/prefs_language.ui
@@ -0,0 +1,260 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>PreferencesLanguage</class>
+ <widget class="QWidget" name="PreferencesLanguage">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>621</width>
+    <height>523</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Form</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <widget class="QGroupBox" name="language_group">
+     <property name="sizePolicy">
+      <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
+       <horstretch>0</horstretch>
+       <verstretch>0</verstretch>
+      </sizepolicy>
+     </property>
+     <property name="title">
+      <string>UI language</string>
+     </property>
+     <layout class="QHBoxLayout" name="horizontalLayout">
+      <item>
+       <widget class="QCheckBox" name="languageSystemDefault">
+        <property name="text">
+         <string>Use system default</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QComboBox" name="languageDropdown"/>
+      </item>
+      <item>
+       <spacer name="horizontalSpacer">
+        <property name="orientation">
+         <enum>Qt::Horizontal</enum>
+        </property>
+        <property name="sizeHint" stdset="0">
+         <size>
+          <width>203</width>
+          <height>20</height>
+         </size>
+        </property>
+       </spacer>
+      </item>
+      <item>
+       <widget class="QLabel" name="label_14">
+        <property name="text">
+         <string>Filter</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QLineEdit" name="languageFilter"/>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QGroupBox" name="dateformat_group">
+     <property name="sizePolicy">
+      <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
+       <horstretch>0</horstretch>
+       <verstretch>0</verstretch>
+      </sizepolicy>
+     </property>
+     <property name="title">
+      <string>Date format</string>
+     </property>
+     <layout class="QGridLayout" name="gridLayout">
+      <item row="0" column="1">
+       <widget class="QLineEdit" name="dateFormatEntry">
+        <property name="toolTip">
+         <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Preferred date format. Commonly used fields are&lt;/p&gt;&lt;p&gt;d (day of month)&lt;/p&gt;&lt;p&gt;ddd (abbr. day name)&lt;/p&gt;&lt;p&gt;M (month number)&lt;/p&gt;&lt;p&gt;MMM (abbr. month name)&lt;/p&gt;&lt;p&gt;yy/yyyy (2/4 digit year)&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+        </property>
+       </widget>
+      </item>
+      <item row="0" column="0">
+       <widget class="QCheckBox" name="dateFormatSystemDefault">
+        <property name="text">
+         <string>Use UI language default</string>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="1">
+       <widget class="QLineEdit" name="shortDateFormatEntry"/>
+      </item>
+      <item row="1" column="3">
+       <widget class="QLabel" name="label">
+        <property name="toolTip">
+         <string>This is used in places where there is less space to show the full date</string>
+        </property>
+        <property name="text">
+         <string>Short format</string>
+        </property>
+       </widget>
+      </item>
+      <item row="0" column="3">
+       <spacer name="horizontalSpacer2">
+        <property name="orientation">
+         <enum>Qt::Horizontal</enum>
+        </property>
+        <property name="sizeHint" stdset="0">
+         <size>
+          <width>203</width>
+          <height>20</height>
+         </size>
+        </property>
+       </spacer>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QGroupBox" name="timeformat_group">
+     <property name="sizePolicy">
+      <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
+       <horstretch>0</horstretch>
+       <verstretch>0</verstretch>
+      </sizepolicy>
+     </property>
+     <property name="title">
+      <string>Time format</string>
+     </property>
+     <layout class="QHBoxLayout" name="horizontalLayout3">
+      <item>
+       <widget class="QCheckBox" name="timeFormatSystemDefault">
+        <property name="text">
+         <string>Use UI language default</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QLineEdit" name="timeFormatEntry">
+        <property name="toolTip">
+         <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Preferred time format&lt;/p&gt;&lt;p&gt;Commonly used format specifiers are&lt;/p&gt;&lt;p&gt;h (hours in 12h format)&lt;/p&gt;&lt;p&gt;H (hours in 24h format)&lt;/p&gt;&lt;p&gt;mm (2 digit minutes)&lt;/p&gt;&lt;p&gt;ss (2 digit seconds)&lt;/p&gt;&lt;p&gt;t/tt (a/p or am/pm)&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <spacer name="horizontalSpacer3">
+        <property name="orientation">
+         <enum>Qt::Horizontal</enum>
+        </property>
+        <property name="sizeHint" stdset="0">
+         <size>
+          <width>203</width>
+          <height>20</height>
+         </size>
+        </property>
+       </spacer>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <spacer name="verticalSpacer">
+     <property name="orientation">
+      <enum>Qt::Vertical</enum>
+     </property>
+     <property name="sizeHint" stdset="0">
+      <size>
+       <width>20</width>
+       <height>20</height>
+      </size>
+     </property>
+    </spacer>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections>
+  <connection>
+   <sender>languageSystemDefault</sender>
+   <signal>toggled(bool)</signal>
+   <receiver>languageDropdown</receiver>
+   <slot>setDisabled(bool)</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>73</x>
+     <y>273</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>179</x>
+     <y>273</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>languageSystemDefault</sender>
+   <signal>toggled(bool)</signal>
+   <receiver>languageFilter</receiver>
+   <slot>setDisabled(bool)</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>73</x>
+     <y>273</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>539</x>
+     <y>273</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>dateFormatSystemDefault</sender>
+   <signal>toggled(bool)</signal>
+   <receiver>dateFormatEntry</receiver>
+   <slot>setDisabled(bool)</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>79</x>
+     <y>132</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>264</x>
+     <y>132</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>timeFormatSystemDefault</sender>
+   <signal>toggled(bool)</signal>
+   <receiver>timeFormatEntry</receiver>
+   <slot>setDisabled(bool)</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>79</x>
+     <y>210</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>264</x>
+     <y>210</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>dateFormatSystemDefault</sender>
+   <signal>toggled(bool)</signal>
+   <receiver>shortDateFormatEntry</receiver>
+   <slot>setDisabled(bool)</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>99</x>
+     <y>132</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>293</x>
+     <y>169</y>
+    </hint>
+   </hints>
+  </connection>
+ </connections>
+</ui>
diff --git a/qt-ui/printdialog.cpp b/desktop-widgets/printdialog.cpp
index cf08062d2..cf08062d2 100644
--- a/qt-ui/printdialog.cpp
+++ b/desktop-widgets/printdialog.cpp
diff --git a/qt-ui/printdialog.h b/desktop-widgets/printdialog.h
index a00c4c5d9..a00c4c5d9 100644
--- a/qt-ui/printdialog.h
+++ b/desktop-widgets/printdialog.h
diff --git a/printer.cpp b/desktop-widgets/printer.cpp
index f0197d446..33ee71b55 100644
--- a/printer.cpp
+++ b/desktop-widgets/printer.cpp
@@ -8,6 +8,7 @@
 #include <QPainter>
 #include <QWebElementCollection>
 #include <QWebElement>
+#include "profile-widget/profilewidget2.h"
 
 Printer::Printer(QPaintDevice *paintDevice, print_options *printOptions, template_options *templateOptions,  PrintMode printMode)
 {
diff --git a/printer.h b/desktop-widgets/printer.h
index 979cacd6a..e5f16d77d 100644
--- a/printer.h
+++ b/desktop-widgets/printer.h
@@ -6,7 +6,6 @@
 #include <QRect>
 #include <QPainter>
 
-#include "profile/profilewidget2.h"
 #include "printoptions.h"
 #include "templateedit.h"
 
diff --git a/qt-ui/printoptions.cpp b/desktop-widgets/printoptions.cpp
index 769c89ff4..769c89ff4 100644
--- a/qt-ui/printoptions.cpp
+++ b/desktop-widgets/printoptions.cpp
diff --git a/qt-ui/printoptions.h b/desktop-widgets/printoptions.h
index 9c50b10f3..9c50b10f3 100644
--- a/qt-ui/printoptions.h
+++ b/desktop-widgets/printoptions.h
diff --git a/qt-ui/printoptions.ui b/desktop-widgets/printoptions.ui
index 1c2523d39..1c2523d39 100644
--- a/qt-ui/printoptions.ui
+++ b/desktop-widgets/printoptions.ui
diff --git a/qt-ui/qtwaitingspinner.cpp b/desktop-widgets/qtwaitingspinner.cpp
index 14e8669b0..14e8669b0 100644
--- a/qt-ui/qtwaitingspinner.cpp
+++ b/desktop-widgets/qtwaitingspinner.cpp
diff --git a/qt-ui/qtwaitingspinner.h b/desktop-widgets/qtwaitingspinner.h
index 254b52ec7..254b52ec7 100644
--- a/qt-ui/qtwaitingspinner.h
+++ b/desktop-widgets/qtwaitingspinner.h
diff --git a/qt-ui/renumber.ui b/desktop-widgets/renumber.ui
index 00e7b84bb..00e7b84bb 100644
--- a/qt-ui/renumber.ui
+++ b/desktop-widgets/renumber.ui
diff --git a/qt-ui/searchbar.ui b/desktop-widgets/searchbar.ui
index 22bce39c6..22bce39c6 100644
--- a/qt-ui/searchbar.ui
+++ b/desktop-widgets/searchbar.ui
diff --git a/qt-ui/setpoint.ui b/desktop-widgets/setpoint.ui
index d96488a31..d96488a31 100644
--- a/qt-ui/setpoint.ui
+++ b/desktop-widgets/setpoint.ui
diff --git a/qt-ui/shiftimagetimes.ui b/desktop-widgets/shiftimagetimes.ui
index 0478a62b4..0478a62b4 100644
--- a/qt-ui/shiftimagetimes.ui
+++ b/desktop-widgets/shiftimagetimes.ui
diff --git a/qt-ui/shifttimes.ui b/desktop-widgets/shifttimes.ui
index 486b1f43b..486b1f43b 100644
--- a/qt-ui/shifttimes.ui
+++ b/desktop-widgets/shifttimes.ui
diff --git a/qt-ui/simplewidgets.cpp b/desktop-widgets/simplewidgets.cpp
index 62a9cc646..43ad1ddc0 100644
--- a/qt-ui/simplewidgets.cpp
+++ b/desktop-widgets/simplewidgets.cpp
@@ -14,7 +14,7 @@
 #include "libdivecomputer/parser.h"
 #include "divelistview.h"
 #include "display.h"
-#include "profile/profilewidget2.h"
+#include "profile-widget/profilewidget2.h"
 #include "undocommands.h"
 
 class MinMaxAvgWidgetPrivate {
diff --git a/qt-ui/simplewidgets.h b/desktop-widgets/simplewidgets.h
index 595c4cd4b..595c4cd4b 100644
--- a/qt-ui/simplewidgets.h
+++ b/desktop-widgets/simplewidgets.h
diff --git a/qt-ui/socialnetworks.cpp b/desktop-widgets/socialnetworks.cpp
index 6e191267a..0794c764e 100644
--- a/qt-ui/socialnetworks.cpp
+++ b/desktop-widgets/socialnetworks.cpp
@@ -16,7 +16,7 @@
 #include <QMessageBox>
 #include <QInputDialog>
 #include "mainwindow.h"
-#include "profile/profilewidget2.h"
+#include "profile-widget/profilewidget2.h"
 #include "pref.h"
 #include "helpers.h"
 #include "ui_socialnetworksdialog.h"
diff --git a/qt-ui/socialnetworks.h b/desktop-widgets/socialnetworks.h
index 2f63915ca..2f63915ca 100644
--- a/qt-ui/socialnetworks.h
+++ b/desktop-widgets/socialnetworks.h
diff --git a/qt-ui/socialnetworksdialog.ui b/desktop-widgets/socialnetworksdialog.ui
index e8953d1c7..e8953d1c7 100644
--- a/qt-ui/socialnetworksdialog.ui
+++ b/desktop-widgets/socialnetworksdialog.ui
diff --git a/qt-ui/starwidget.cpp b/desktop-widgets/starwidget.cpp
index d959ed3b9..d959ed3b9 100644
--- a/qt-ui/starwidget.cpp
+++ b/desktop-widgets/starwidget.cpp
diff --git a/qt-ui/starwidget.h b/desktop-widgets/starwidget.h
index 989aa527d..989aa527d 100644
--- a/qt-ui/starwidget.h
+++ b/desktop-widgets/starwidget.h
diff --git a/qt-ui/statistics/monthstatistics.cpp b/desktop-widgets/statistics/monthstatistics.cpp
index e69de29bb..e69de29bb 100644
--- a/qt-ui/statistics/monthstatistics.cpp
+++ b/desktop-widgets/statistics/monthstatistics.cpp
diff --git a/qt-ui/statistics/monthstatistics.h b/desktop-widgets/statistics/monthstatistics.h
index e69de29bb..e69de29bb 100644
--- a/qt-ui/statistics/monthstatistics.h
+++ b/desktop-widgets/statistics/monthstatistics.h
diff --git a/qt-ui/statistics/statisticsbar.cpp b/desktop-widgets/statistics/statisticsbar.cpp
index e69de29bb..e69de29bb 100644
--- a/qt-ui/statistics/statisticsbar.cpp
+++ b/desktop-widgets/statistics/statisticsbar.cpp
diff --git a/qt-ui/statistics/statisticsbar.h b/desktop-widgets/statistics/statisticsbar.h
index e69de29bb..e69de29bb 100644
--- a/qt-ui/statistics/statisticsbar.h
+++ b/desktop-widgets/statistics/statisticsbar.h
diff --git a/qt-ui/statistics/statisticswidget.cpp b/desktop-widgets/statistics/statisticswidget.cpp
index 3e91fa317..3e91fa317 100644
--- a/qt-ui/statistics/statisticswidget.cpp
+++ b/desktop-widgets/statistics/statisticswidget.cpp
diff --git a/qt-ui/statistics/statisticswidget.h b/desktop-widgets/statistics/statisticswidget.h
index ae988292d..ae988292d 100644
--- a/qt-ui/statistics/statisticswidget.h
+++ b/desktop-widgets/statistics/statisticswidget.h
diff --git a/qt-ui/statistics/yearstatistics.cpp b/desktop-widgets/statistics/yearstatistics.cpp
index e69de29bb..e69de29bb 100644
--- a/qt-ui/statistics/yearstatistics.cpp
+++ b/desktop-widgets/statistics/yearstatistics.cpp
diff --git a/qt-ui/statistics/yearstatistics.h b/desktop-widgets/statistics/yearstatistics.h
index e69de29bb..e69de29bb 100644
--- a/qt-ui/statistics/yearstatistics.h
+++ b/desktop-widgets/statistics/yearstatistics.h
diff --git a/qt-ui/subsurfacewebservices.cpp b/desktop-widgets/subsurfacewebservices.cpp
index ee079cc48..ee079cc48 100644
--- a/qt-ui/subsurfacewebservices.cpp
+++ b/desktop-widgets/subsurfacewebservices.cpp
diff --git a/qt-ui/subsurfacewebservices.h b/desktop-widgets/subsurfacewebservices.h
index 2b454ebc7..2b454ebc7 100644
--- a/qt-ui/subsurfacewebservices.h
+++ b/desktop-widgets/subsurfacewebservices.h
diff --git a/qt-ui/tableview.cpp b/desktop-widgets/tableview.cpp
index 40d5199ec..40d5199ec 100644
--- a/qt-ui/tableview.cpp
+++ b/desktop-widgets/tableview.cpp
diff --git a/qt-ui/tableview.h b/desktop-widgets/tableview.h
index f72b256ea..f72b256ea 100644
--- a/qt-ui/tableview.h
+++ b/desktop-widgets/tableview.h
diff --git a/qt-ui/tableview.ui b/desktop-widgets/tableview.ui
index 73867231e..73867231e 100644
--- a/qt-ui/tableview.ui
+++ b/desktop-widgets/tableview.ui
diff --git a/qt-ui/tagwidget.cpp b/desktop-widgets/tagwidget.cpp
index 3b61b492a..3b61b492a 100644
--- a/qt-ui/tagwidget.cpp
+++ b/desktop-widgets/tagwidget.cpp
diff --git a/qt-ui/tagwidget.h b/desktop-widgets/tagwidget.h
index 6a16129f3..6a16129f3 100644
--- a/qt-ui/tagwidget.h
+++ b/desktop-widgets/tagwidget.h
diff --git a/qt-ui/templateedit.cpp b/desktop-widgets/templateedit.cpp
index 4964016b9..4964016b9 100644
--- a/qt-ui/templateedit.cpp
+++ b/desktop-widgets/templateedit.cpp
diff --git a/qt-ui/templateedit.h b/desktop-widgets/templateedit.h
index 5e548ae19..5e548ae19 100644
--- a/qt-ui/templateedit.h
+++ b/desktop-widgets/templateedit.h
diff --git a/qt-ui/templateedit.ui b/desktop-widgets/templateedit.ui
index 60a0fc7e6..60a0fc7e6 100644
--- a/qt-ui/templateedit.ui
+++ b/desktop-widgets/templateedit.ui
diff --git a/templatelayout.cpp b/desktop-widgets/templatelayout.cpp
index a376459a6..a376459a6 100644
--- a/templatelayout.cpp
+++ b/desktop-widgets/templatelayout.cpp
diff --git a/templatelayout.h b/desktop-widgets/templatelayout.h
index a2868e7ff..a2868e7ff 100644
--- a/templatelayout.h
+++ b/desktop-widgets/templatelayout.h
diff --git a/qt-ui/undocommands.cpp b/desktop-widgets/undocommands.cpp
index 0fd182cb3..0fd182cb3 100644
--- a/qt-ui/undocommands.cpp
+++ b/desktop-widgets/undocommands.cpp
diff --git a/qt-ui/undocommands.h b/desktop-widgets/undocommands.h
index 8e359db51..8e359db51 100644
--- a/qt-ui/undocommands.h
+++ b/desktop-widgets/undocommands.h
diff --git a/qt-ui/updatemanager.cpp b/desktop-widgets/updatemanager.cpp
index 0760d6407..0760d6407 100644
--- a/qt-ui/updatemanager.cpp
+++ b/desktop-widgets/updatemanager.cpp
diff --git a/qt-ui/updatemanager.h b/desktop-widgets/updatemanager.h
index f91c82dc8..f91c82dc8 100644
--- a/qt-ui/updatemanager.h
+++ b/desktop-widgets/updatemanager.h
diff --git a/qt-ui/urldialog.ui b/desktop-widgets/urldialog.ui
index 397f90a64..397f90a64 100644
--- a/qt-ui/urldialog.ui
+++ b/desktop-widgets/urldialog.ui
diff --git a/qt-ui/usermanual.cpp b/desktop-widgets/usermanual.cpp
index 6b676f16b..6b676f16b 100644
--- a/qt-ui/usermanual.cpp
+++ b/desktop-widgets/usermanual.cpp
diff --git a/qt-ui/usermanual.h b/desktop-widgets/usermanual.h
index 5101a3c3b..5101a3c3b 100644
--- a/qt-ui/usermanual.h
+++ b/desktop-widgets/usermanual.h
diff --git a/qt-ui/usersurvey.cpp b/desktop-widgets/usersurvey.cpp
index 05da582a1..05da582a1 100644
--- a/qt-ui/usersurvey.cpp
+++ b/desktop-widgets/usersurvey.cpp
diff --git a/qt-ui/usersurvey.h b/desktop-widgets/usersurvey.h
index 1dd5aaab3..1dd5aaab3 100644
--- a/qt-ui/usersurvey.h
+++ b/desktop-widgets/usersurvey.h
diff --git a/qt-ui/usersurvey.ui b/desktop-widgets/usersurvey.ui
index c118fe89d..c118fe89d 100644
--- a/qt-ui/usersurvey.ui
+++ b/desktop-widgets/usersurvey.ui
diff --git a/qt-ui/webservices.ui b/desktop-widgets/webservices.ui
index bcca35f1e..bcca35f1e 100644
--- a/qt-ui/webservices.ui
+++ b/desktop-widgets/webservices.ui
diff --git a/satellite.svg b/icons/satellite.svg
index 10b2ee5db..10b2ee5db 100644
--- a/satellite.svg
+++ b/icons/satellite.svg
diff --git a/subsurface-icon.svg b/icons/subsurface-icon.svg
index 29410c8ee..29410c8ee 100644
--- a/subsurface-icon.svg
+++ b/icons/subsurface-icon.svg
diff --git a/subsurface-mobile-icon.svg b/icons/subsurface-mobile-icon.svg
index e4cf8aea2..e4cf8aea2 100644
--- a/subsurface-mobile-icon.svg
+++ b/icons/subsurface-mobile-icon.svg
diff --git a/profile-widget/CMakeLists.txt b/profile-widget/CMakeLists.txt
new file mode 100644
index 000000000..f0a1d8439
--- /dev/null
+++ b/profile-widget/CMakeLists.txt
@@ -0,0 +1,19 @@
+# the profile widget
+set(SUBSURFACE_PROFILE_LIB_SRCS
+	profilewidget2.cpp
+	diverectitem.cpp
+	divepixmapitem.cpp
+	divelineitem.cpp
+	divetextitem.cpp
+	animationfunctions.cpp
+	divecartesianaxis.cpp
+	diveprofileitem.cpp
+	diveeventitem.cpp
+	divetooltipitem.cpp
+	ruleritem.cpp
+	tankitem.cpp
+)
+source_group("Subsurface Profile" FILES ${SUBSURFACE_PROFILE_LIB_SRCS})
+
+add_library(subsurface_profile STATIC ${SUBSURFACE_PROFILE_LIB_SRCS})
+target_link_libraries(subsurface_profile ${QT_LIBRARIES})
\ No newline at end of file
diff --git a/qt-ui/profile/animationfunctions.cpp b/profile-widget/animationfunctions.cpp
index a19d50c9d..a19d50c9d 100644
--- a/qt-ui/profile/animationfunctions.cpp
+++ b/profile-widget/animationfunctions.cpp
diff --git a/qt-ui/profile/animationfunctions.h b/profile-widget/animationfunctions.h
index 3cfcff563..3cfcff563 100644
--- a/qt-ui/profile/animationfunctions.h
+++ b/profile-widget/animationfunctions.h
diff --git a/qt-ui/profile/divecartesianaxis.cpp b/profile-widget/divecartesianaxis.cpp
index bf5a5380c..f40e1c3e5 100644
--- a/qt-ui/profile/divecartesianaxis.cpp
+++ b/profile-widget/divecartesianaxis.cpp
@@ -1,7 +1,7 @@
 #include "divecartesianaxis.h"
 #include "divetextitem.h"
 #include "helpers.h"
-#include "preferences.h"
+#include "preferences/preferencesdialog.h"
 #include "diveplotdatamodel.h"
 #include "animationfunctions.h"
 #include "mainwindow.h"
diff --git a/qt-ui/profile/divecartesianaxis.h b/profile-widget/divecartesianaxis.h
index 27cfa62d8..cc7d0bcf7 100644
--- a/qt-ui/profile/divecartesianaxis.h
+++ b/profile-widget/divecartesianaxis.h
@@ -3,7 +3,7 @@
 
 #include <QObject>
 #include <QGraphicsLineItem>
-#include <graphicsview-common.h>
+#include "subsurface-core/color.h"
 
 class QPropertyAnimation;
 class DiveTextItem;
diff --git a/qt-ui/profile/diveeventitem.cpp b/profile-widget/diveeventitem.cpp
index 0bbc84267..0bbc84267 100644
--- a/qt-ui/profile/diveeventitem.cpp
+++ b/profile-widget/diveeventitem.cpp
diff --git a/qt-ui/profile/diveeventitem.h b/profile-widget/diveeventitem.h
index f358fee6d..f358fee6d 100644
--- a/qt-ui/profile/diveeventitem.h
+++ b/profile-widget/diveeventitem.h
diff --git a/qt-ui/profile/divelineitem.cpp b/profile-widget/divelineitem.cpp
index f9e288a44..f9e288a44 100644
--- a/qt-ui/profile/divelineitem.cpp
+++ b/profile-widget/divelineitem.cpp
diff --git a/qt-ui/profile/divelineitem.h b/profile-widget/divelineitem.h
index ec88e9da5..ec88e9da5 100644
--- a/qt-ui/profile/divelineitem.h
+++ b/profile-widget/divelineitem.h
diff --git a/qt-ui/profile/divepixmapitem.cpp b/profile-widget/divepixmapitem.cpp
index 581f6f9b4..627473c2f 100644
--- a/qt-ui/profile/divepixmapitem.cpp
+++ b/profile-widget/divepixmapitem.cpp
@@ -1,7 +1,7 @@
 #include "divepixmapitem.h"
 #include "animationfunctions.h"
 #include "divepicturemodel.h"
-#include <preferences.h>
+#include "preferences/preferencesdialog.h"
 
 #include <QDesktopServices>
 #include <QGraphicsView>
diff --git a/qt-ui/profile/divepixmapitem.h b/profile-widget/divepixmapitem.h
index 02c1523f7..02c1523f7 100644
--- a/qt-ui/profile/divepixmapitem.h
+++ b/profile-widget/divepixmapitem.h
diff --git a/qt-ui/profile/diveprofileitem.cpp b/profile-widget/diveprofileitem.cpp
index 2c814678a..14efa9123 100644
--- a/qt-ui/profile/diveprofileitem.cpp
+++ b/profile-widget/diveprofileitem.cpp
@@ -5,13 +5,13 @@
 #include "animationfunctions.h"
 #include "dive.h"
 #include "profile.h"
-#include "preferences.h"
+#include "preferences/preferencesdialog.h"
 #include "diveplannermodel.h"
 #include "helpers.h"
 #include "libdivecomputer/parser.h"
 #include "mainwindow.h"
 #include "maintab.h"
-#include "profile/profilewidget2.h"
+#include "profilewidget2.h"
 #include "diveplanner.h"
 
 #include <QSettings>
diff --git a/qt-ui/profile/diveprofileitem.h b/profile-widget/diveprofileitem.h
index 2160782f7..0bba7f7a3 100644
--- a/qt-ui/profile/diveprofileitem.h
+++ b/profile-widget/diveprofileitem.h
@@ -5,7 +5,6 @@
 #include <QGraphicsPolygonItem>
 #include <QModelIndex>
 
-#include "graphicsview-common.h"
 #include "divelineitem.h"
 
 /* This is the Profile Item, it should be used for quite a lot of things
diff --git a/qt-ui/profile/diverectitem.cpp b/profile-widget/diverectitem.cpp
index 8cb60c3f5..8cb60c3f5 100644
--- a/qt-ui/profile/diverectitem.cpp
+++ b/profile-widget/diverectitem.cpp
diff --git a/qt-ui/profile/diverectitem.h b/profile-widget/diverectitem.h
index e616cf591..e616cf591 100644
--- a/qt-ui/profile/diverectitem.h
+++ b/profile-widget/diverectitem.h
diff --git a/qt-ui/profile/divetextitem.cpp b/profile-widget/divetextitem.cpp
index 9c7848cd4..3bf00d68f 100644
--- a/qt-ui/profile/divetextitem.cpp
+++ b/profile-widget/divetextitem.cpp
@@ -1,6 +1,9 @@
 #include "divetextitem.h"
 #include "mainwindow.h"
 #include "profilewidget2.h"
+#include "subsurface-core/color.h"
+
+#include <QBrush>
 
 DiveTextItem::DiveTextItem(QGraphicsItem *parent) : QGraphicsItemGroup(parent),
 	internalAlignFlags(Qt::AlignHCenter | Qt::AlignVCenter),
diff --git a/qt-ui/profile/divetextitem.h b/profile-widget/divetextitem.h
index 3991fe7f3..be0adf292 100644
--- a/qt-ui/profile/divetextitem.h
+++ b/profile-widget/divetextitem.h
@@ -3,8 +3,8 @@
 
 #include <QObject>
 #include <QGraphicsItemGroup>
-#include "graphicsview-common.h"
-#include <QBrush>
+
+class QBrush;
 
 /* A Line Item that has animated-properties. */
 class DiveTextItem : public QObject, public QGraphicsItemGroup {
diff --git a/qt-ui/profile/divetooltipitem.cpp b/profile-widget/divetooltipitem.cpp
index d4818422b..d4818422b 100644
--- a/qt-ui/profile/divetooltipitem.cpp
+++ b/profile-widget/divetooltipitem.cpp
diff --git a/qt-ui/profile/divetooltipitem.h b/profile-widget/divetooltipitem.h
index 4fa7ec2d7..4fa7ec2d7 100644
--- a/qt-ui/profile/divetooltipitem.h
+++ b/profile-widget/divetooltipitem.h
diff --git a/qt-ui/profile/profilewidget2.cpp b/profile-widget/profilewidget2.cpp
index d47467038..653818556 100644
--- a/qt-ui/profile/profilewidget2.cpp
+++ b/profile-widget/profilewidget2.cpp
@@ -29,7 +29,7 @@
 #include <QTableView>
 #endif
 #include "mainwindow.h"
-#include <preferences.h>
+#include "preferences/preferencesdialog.h"
 
 /* This is the global 'Item position' variable.
  * it should tell you where to position things up
diff --git a/qt-ui/profile/profilewidget2.h b/profile-widget/profilewidget2.h
index 23e939869..ce3fda083 100644
--- a/qt-ui/profile/profilewidget2.h
+++ b/profile-widget/profilewidget2.h
@@ -13,7 +13,6 @@
 //  *
 //  * It needs to be dynamic, things should *flow* on it, not just appear / disappear.
 //  */
-#include "graphicsview-common.h"
 #include "divelineitem.h"
 #include "diveprofileitem.h"
 #include "display.h"
diff --git a/qt-ui/profile/ruleritem.cpp b/profile-widget/ruleritem.cpp
index 830985552..a5a61c0fe 100644
--- a/qt-ui/profile/ruleritem.cpp
+++ b/profile-widget/ruleritem.cpp
@@ -1,5 +1,5 @@
 #include "ruleritem.h"
-#include "preferences.h"
+#include "preferences/preferencesdialog.h"
 #include "mainwindow.h"
 #include "profilewidget2.h"
 #include "display.h"
diff --git a/qt-ui/profile/ruleritem.h b/profile-widget/ruleritem.h
index 4fad0451c..4fad0451c 100644
--- a/qt-ui/profile/ruleritem.h
+++ b/profile-widget/ruleritem.h
diff --git a/qt-ui/profile/tankitem.cpp b/profile-widget/tankitem.cpp
index c0e75a371..c0e75a371 100644
--- a/qt-ui/profile/tankitem.cpp
+++ b/profile-widget/tankitem.cpp
diff --git a/qt-ui/profile/tankitem.h b/profile-widget/tankitem.h
index fd685fc82..fd685fc82 100644
--- a/qt-ui/profile/tankitem.h
+++ b/profile-widget/tankitem.h
diff --git a/qt-models/CMakeLists.txt b/qt-models/CMakeLists.txt
new file mode 100644
index 000000000..c9bcf5c3d
--- /dev/null
+++ b/qt-models/CMakeLists.txt
@@ -0,0 +1,29 @@
+# the data models that will interface
+# with the views.
+set(SUBSURFACE_MODELS_LIB_SRCS
+	cleanertablemodel.cpp
+	cylindermodel.cpp
+	diveplannermodel.cpp
+	models.cpp
+	filtermodels.cpp
+	tankinfomodel.cpp
+	weigthsysteminfomodel.cpp
+	weightmodel.cpp
+	divecomputermodel.cpp
+	treemodel.cpp
+	tableprintmodel.cpp
+	yearlystatisticsmodel.cpp
+	divetripmodel.cpp
+	divecomputerextradatamodel.cpp
+	completionmodels.cpp
+	profileprintmodel.cpp
+	divepicturemodel.cpp
+	diveplotdatamodel.cpp
+	divelocationmodel.cpp
+	divesitepicturesmodel.cpp
+	ssrfsortfilterproxymodel.cpp
+)
+
+source_group("Subsurface Models" FILES ${SUBSURFACE_MODELS})
+add_library(subsurface_models STATIC ${SUBSURFACE_MODELS_LIB_SRCS})
+target_link_libraries(subsurface_models ${QT_LIBRARIES})
\ No newline at end of file
diff --git a/qt-models/completionmodels.cpp b/qt-models/completionmodels.cpp
index 838d239d2..a8b61aed5 100644
--- a/qt-models/completionmodels.cpp
+++ b/qt-models/completionmodels.cpp
@@ -1,6 +1,7 @@
 #include "completionmodels.h"
 #include "dive.h"
-#include "mainwindow.h"
+#include <QSet>
+#include <QString>
 
 #define CREATE_UPDATE_METHOD(Class, diveStructMember)          \
 	void Class::updateModel()                              \
diff --git a/qt-models/diveplotdatamodel.cpp b/qt-models/diveplotdatamodel.cpp
index f219947ac..de156bfac 100644
--- a/qt-models/diveplotdatamodel.cpp
+++ b/qt-models/diveplotdatamodel.cpp
@@ -1,8 +1,8 @@
 #include "diveplotdatamodel.h"
 #include "dive.h"
 #include "profile.h"
-#include "graphicsview-common.h"
 #include "divelist.h"
+#include "subsurface-core/color.h"
 
 DivePlotDataModel::DivePlotDataModel(QObject *parent) :
 	QAbstractTableModel(parent),
diff --git a/qt-models/filtermodels.cpp b/qt-models/filtermodels.cpp
index 80ed0cfd5..f56f4be1c 100644
--- a/qt-models/filtermodels.cpp
+++ b/qt-models/filtermodels.cpp
@@ -1,8 +1,9 @@
 #include "filtermodels.h"
-#include "mainwindow.h"
 #include "models.h"
-#include "divelistview.h"
 #include "display.h"
+#include "divetripmodel.h"
+
+#include <QDebug>
 
 #define CREATE_INSTANCE_METHOD( CLASS ) \
 CLASS *CLASS::instance() \
@@ -355,9 +356,16 @@ bool MultiFilterSortModel::filterAcceptsRow(int source_row, const QModelIndex &s
 
 void MultiFilterSortModel::myInvalidate()
 {
+	//WARNING:
+	//TODO:
+	// THIS CODE BELOW IS COMPLETELY BROKEN. I KNOW, I WROTE IT.
+	// REMOVE THIS, MAKE IT SANE.
+	// GRRRRR.
+
+#if 0
 	int i;
 	struct dive *d;
-	DiveListView *dlv = MainWindow::instance()->dive_list();
+	// DiveListView *dlv = MainWindow::instance()->dive_list();
 
 	divesDisplayed = 0;
 
@@ -395,6 +403,7 @@ void MultiFilterSortModel::myInvalidate()
 	if (curr_dive_site) {
 		dlv->expandAll();
 	}
+#endif
 }
 
 void MultiFilterSortModel::addFilterModel(MultiFilterInterface *model)
diff --git a/qt-models/models.h b/qt-models/models.h
index c9212195e..f152af469 100644
--- a/qt-models/models.h
+++ b/qt-models/models.h
@@ -15,9 +15,9 @@
 
 #include "metrics.h"
 
-#include "../dive.h"
-#include "../divelist.h"
-#include "../divecomputer.h"
+#include "subsurface-core/dive.h"
+#include "subsurface-core/divelist.h"
+#include "subsurface-core/divecomputer.h"
 #include "cleanertablemodel.h"
 #include "treemodel.h"
 
diff --git a/qt-ui/graphicsview-common.h b/qt-ui/graphicsview-common.h
deleted file mode 100644
index 3c1cb75a0..000000000
--- a/qt-ui/graphicsview-common.h
+++ /dev/null
@@ -1,94 +0,0 @@
-#ifndef GRAPHICSVIEW_COMMON_H
-#define GRAPHICSVIEW_COMMON_H
-
-#include "../color.h"
-#include <QMap>
-#include <QVector>
-#include <QColor>
-
-#define SAC_COLORS_START_IDX SAC_1
-#define SAC_COLORS 9
-#define VELOCITY_COLORS_START_IDX VELO_STABLE
-#define VELOCITY_COLORS 5
-
-typedef enum {
-	/* SAC colors. Order is important, the SAC_COLORS_START_IDX define above. */
-	SAC_1,
-	SAC_2,
-	SAC_3,
-	SAC_4,
-	SAC_5,
-	SAC_6,
-	SAC_7,
-	SAC_8,
-	SAC_9,
-
-	/* Velocity colors.  Order is still important, ref VELOCITY_COLORS_START_IDX. */
-	VELO_STABLE,
-	VELO_SLOW,
-	VELO_MODERATE,
-	VELO_FAST,
-	VELO_CRAZY,
-
-	/* gas colors */
-	PO2,
-	PO2_ALERT,
-	PN2,
-	PN2_ALERT,
-	PHE,
-	PHE_ALERT,
-	O2SETPOINT,
-	CCRSENSOR1,
-	CCRSENSOR2,
-	CCRSENSOR3,
-	PP_LINES,
-
-	/* Other colors */
-	TEXT_BACKGROUND,
-	ALERT_BG,
-	ALERT_FG,
-	EVENTS,
-	SAMPLE_DEEP,
-	SAMPLE_SHALLOW,
-	SMOOTHED,
-	MINUTE,
-	TIME_GRID,
-	TIME_TEXT,
-	DEPTH_GRID,
-	MEAN_DEPTH,
-	HR_TEXT,
-	HR_PLOT,
-	HR_AXIS,
-	DEPTH_TOP,
-	DEPTH_BOTTOM,
-	TEMP_TEXT,
-	TEMP_PLOT,
-	SAC_DEFAULT,
-	BOUNDING_BOX,
-	PRESSURE_TEXT,
-	BACKGROUND,
-	BACKGROUND_TRANS,
-	CEILING_SHALLOW,
-	CEILING_DEEP,
-	CALC_CEILING_SHALLOW,
-	CALC_CEILING_DEEP,
-	TISSUE_PERCENTAGE,
-	GF_LINE,
-	AMB_PRESSURE_LINE
-} color_indice_t;
-
-
-/* profile_color[color indice] = COLOR(screen color, b/w printer color, color printer}} printer & screen colours could be different */
-
-extern QMap<color_indice_t, QVector<QColor> > profile_color;
-void fill_profile_color();
-QColor getColor(const color_indice_t i, bool isGrayscale = false);
-QColor getSacColor(int sac, int diveSac);
-struct text_render_options {
-	double size;
-	color_indice_t color;
-	double hpos, vpos;
-};
-
-typedef text_render_options text_render_options_t;
-#endif // GRAPHICSVIEW_COMMON_H
diff --git a/qt-ui/preferences.cpp b/qt-ui/preferences.cpp
deleted file mode 100644
index 6450c41cb..000000000
--- a/qt-ui/preferences.cpp
+++ /dev/null
@@ -1,559 +0,0 @@
-#include "preferences.h"
-#include "mainwindow.h"
-#include "models.h"
-#include "divelocationmodel.h"
-#include "prefs-macros.h"
-#include "qthelper.h"
-#include "subsurfacestartup.h"
-
-#include <QSettings>
-#include <QFileDialog>
-#include <QMessageBox>
-#include <QShortcut>
-#include <QNetworkProxy>
-#include <QNetworkCookieJar>
-
-#include "subsurfacewebservices.h"
-
-#if !defined(Q_OS_ANDROID) && defined(FBSUPPORT)
-#include "socialnetworks.h"
-#include <QWebView>
-#endif
-
-PreferencesDialog *PreferencesDialog::instance()
-{
-	static PreferencesDialog *dialog = new PreferencesDialog(MainWindow::instance());
-	return dialog;
-}
-
-PreferencesDialog::PreferencesDialog(QWidget *parent, Qt::WindowFlags f) : QDialog(parent, f)
-{
-	ui.setupUi(this);
-	setAttribute(Qt::WA_QuitOnClose, false);
-
-#if defined(Q_OS_ANDROID) || !defined(FBSUPPORT)
-	for (int i = 0; i < ui.listWidget->count(); i++) {
-		if (ui.listWidget->item(i)->text() == "Facebook") {
-			delete ui.listWidget->item(i);
-			QWidget *fbpage = ui.stackedWidget->widget(i);
-			ui.stackedWidget->removeWidget(fbpage);
-		}
-	}
-#endif
-
-	ui.proxyType->clear();
-	ui.proxyType->addItem(tr("No proxy"), QNetworkProxy::NoProxy);
-	ui.proxyType->addItem(tr("System proxy"), QNetworkProxy::DefaultProxy);
-	ui.proxyType->addItem(tr("HTTP proxy"), QNetworkProxy::HttpProxy);
-	ui.proxyType->addItem(tr("SOCKS proxy"), QNetworkProxy::Socks5Proxy);
-	ui.proxyType->setCurrentIndex(-1);
-
-	ui.first_item->setModel(GeoReferencingOptionsModel::instance());
-	ui.second_item->setModel(GeoReferencingOptionsModel::instance());
-	ui.third_item->setModel(GeoReferencingOptionsModel::instance());
-	// Facebook stuff:
-#if !defined(Q_OS_ANDROID) && defined(FBSUPPORT)
-	FacebookManager *fb = FacebookManager::instance();
-	facebookWebView = new QWebView(this);
-	ui.fbWebviewContainer->layout()->addWidget(facebookWebView);
-	if (fb->loggedIn()) {
-		facebookLoggedIn();
-	} else {
-		facebookDisconnect();
-	}
-	connect(facebookWebView, &QWebView::urlChanged, fb, &FacebookManager::tryLogin);
-	connect(fb, &FacebookManager::justLoggedIn, this, &PreferencesDialog::facebookLoggedIn);
-	connect(ui.fbDisconnect, &QPushButton::clicked, fb, &FacebookManager::logout);
-	connect(fb, &FacebookManager::justLoggedOut, this, &PreferencesDialog::facebookDisconnect);
-#endif
-	connect(ui.proxyType, SIGNAL(currentIndexChanged(int)), this, SLOT(proxyType_changed(int)));
-	connect(ui.buttonBox, SIGNAL(clicked(QAbstractButton *)), this, SLOT(buttonClicked(QAbstractButton *)));
-	connect(ui.gflow, SIGNAL(valueChanged(int)), this, SLOT(gflowChanged(int)));
-	connect(ui.gfhigh, SIGNAL(valueChanged(int)), this, SLOT(gfhighChanged(int)));
-	//	connect(ui.defaultSetpoint, SIGNAL(valueChanged(double)), this, SLOT(defaultSetpointChanged(double)));
-	QShortcut *close = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_W), this);
-	connect(close, SIGNAL(activated()), this, SLOT(close()));
-	QShortcut *quit = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_Q), this);
-	connect(quit, SIGNAL(activated()), parent, SLOT(close()));
-	loadSettings();
-	setUiFromPrefs();
-	rememberPrefs();
-}
-
-void PreferencesDialog::facebookLoggedIn()
-{
-#if !defined(Q_OS_ANDROID) && defined(FBSUPPORT)
-	ui.fbDisconnect->show();
-	ui.fbWebviewContainer->hide();
-	ui.fbWebviewContainer->setEnabled(false);
-	ui.FBLabel->setText(tr("To disconnect Subsurface from your Facebook account, use the button below"));
-#endif
-}
-
-void PreferencesDialog::facebookDisconnect()
-{
-#if !defined(Q_OS_ANDROID) && defined(FBSUPPORT)
-	// remove the connect/disconnect button
-	// and instead add the login view
-	ui.fbDisconnect->hide();
-	ui.fbWebviewContainer->show();
-	ui.fbWebviewContainer->setEnabled(true);
-	ui.FBLabel->setText(tr("To connect to Facebook, please log in. This enables Subsurface to publish dives to your timeline"));
-	if (facebookWebView) {
-		facebookWebView->page()->networkAccessManager()->setCookieJar(new QNetworkCookieJar());
-		facebookWebView->setUrl(FacebookManager::instance()->connectUrl());
-	}
-#endif
-}
-
-void PreferencesDialog::cloudPinNeeded()
-{
-	ui.cloud_storage_pin->setEnabled(prefs.cloud_verification_status == CS_NEED_TO_VERIFY);
-	ui.cloud_storage_pin->setVisible(prefs.cloud_verification_status == CS_NEED_TO_VERIFY);
-	ui.cloud_storage_pin_label->setEnabled(prefs.cloud_verification_status == CS_NEED_TO_VERIFY);
-	ui.cloud_storage_pin_label->setVisible(prefs.cloud_verification_status == CS_NEED_TO_VERIFY);
-	ui.cloud_storage_new_passwd->setEnabled(prefs.cloud_verification_status == CS_VERIFIED);
-	ui.cloud_storage_new_passwd->setVisible(prefs.cloud_verification_status == CS_VERIFIED);
-	ui.cloud_storage_new_passwd_label->setEnabled(prefs.cloud_verification_status == CS_VERIFIED);
-	ui.cloud_storage_new_passwd_label->setVisible(prefs.cloud_verification_status == CS_VERIFIED);
-	if (prefs.cloud_verification_status == CS_VERIFIED) {
-		ui.cloudStorageGroupBox->setTitle(tr("Subsurface cloud storage (credentials verified)"));
-		ui.cloudDefaultFile->setEnabled(true);
-	} else {
-		ui.cloudStorageGroupBox->setTitle(tr("Subsurface cloud storage"));
-		if (ui.cloudDefaultFile->isChecked())
-			ui.noDefaultFile->setChecked(true);
-		ui.cloudDefaultFile->setEnabled(false);
-	}
-	MainWindow::instance()->enableDisableCloudActions();
-}
-
-#define DANGER_GF (gf > 100) ? "* { color: red; }" : ""
-void PreferencesDialog::gflowChanged(int gf)
-{
-	ui.gflow->setStyleSheet(DANGER_GF);
-}
-void PreferencesDialog::gfhighChanged(int gf)
-{
-	ui.gfhigh->setStyleSheet(DANGER_GF);
-}
-#undef DANGER_GF
-
-void PreferencesDialog::showEvent(QShowEvent *event)
-{
-	setUiFromPrefs();
-	rememberPrefs();
-	QDialog::showEvent(event);
-}
-
-void PreferencesDialog::setUiFromPrefs()
-{
-	// graphs
-	ui.pheThreshold->setValue(prefs.pp_graphs.phe_threshold);
-	ui.po2Threshold->setValue(prefs.pp_graphs.po2_threshold);
-	ui.pn2Threshold->setValue(prefs.pp_graphs.pn2_threshold);
-	ui.maxpo2->setValue(prefs.modpO2);
-	ui.red_ceiling->setChecked(prefs.redceiling);
-	ui.units_group->setEnabled(ui.personalize->isChecked());
-
-	ui.gflow->setValue(prefs.gflow);
-	ui.gfhigh->setValue(prefs.gfhigh);
-	ui.gf_low_at_maxdepth->setChecked(prefs.gf_low_at_maxdepth);
-	ui.show_ccr_setpoint->setChecked(prefs.show_ccr_setpoint);
-	ui.show_ccr_sensors->setChecked(prefs.show_ccr_sensors);
-	ui.defaultSetpoint->setValue((double)prefs.defaultsetpoint / 1000.0);
-	ui.psro2rate->setValue(prefs.o2consumption / 1000.0);
-	ui.pscrfactor->setValue(rint(1000.0 / prefs.pscr_ratio));
-
-	// units
-	if (prefs.unit_system == METRIC)
-		ui.metric->setChecked(true);
-	else if (prefs.unit_system == IMPERIAL)
-		ui.imperial->setChecked(true);
-	else
-		ui.personalize->setChecked(true);
-	ui.gpsTraditional->setChecked(prefs.coordinates_traditional);
-	ui.gpsDecimal->setChecked(!prefs.coordinates_traditional);
-
-	ui.celsius->setChecked(prefs.units.temperature == units::CELSIUS);
-	ui.fahrenheit->setChecked(prefs.units.temperature == units::FAHRENHEIT);
-	ui.meter->setChecked(prefs.units.length == units::METERS);
-	ui.feet->setChecked(prefs.units.length == units::FEET);
-	ui.bar->setChecked(prefs.units.pressure == units::BAR);
-	ui.psi->setChecked(prefs.units.pressure == units::PSI);
-	ui.liter->setChecked(prefs.units.volume == units::LITER);
-	ui.cuft->setChecked(prefs.units.volume == units::CUFT);
-	ui.kg->setChecked(prefs.units.weight == units::KG);
-	ui.lbs->setChecked(prefs.units.weight == units::LBS);
-
-	ui.font->setCurrentFont(QString(prefs.divelist_font));
-	ui.fontsize->setValue(prefs.font_size);
-	ui.defaultfilename->setText(prefs.default_filename);
-	ui.noDefaultFile->setChecked(prefs.default_file_behavior == NO_DEFAULT_FILE);
-	ui.cloudDefaultFile->setChecked(prefs.default_file_behavior == CLOUD_DEFAULT_FILE);
-	ui.localDefaultFile->setChecked(prefs.default_file_behavior == LOCAL_DEFAULT_FILE);
-	ui.default_cylinder->clear();
-	for (int i = 0; tank_info[i].name != NULL; i++) {
-		ui.default_cylinder->addItem(tank_info[i].name);
-		if (prefs.default_cylinder && strcmp(tank_info[i].name, prefs.default_cylinder) == 0)
-			ui.default_cylinder->setCurrentIndex(i);
-	}
-	ui.displayinvalid->setChecked(prefs.display_invalid_dives);
-	ui.display_unused_tanks->setChecked(prefs.display_unused_tanks);
-	ui.show_average_depth->setChecked(prefs.show_average_depth);
-	ui.vertical_speed_minutes->setChecked(prefs.units.vertical_speed_time == units::MINUTES);
-	ui.vertical_speed_seconds->setChecked(prefs.units.vertical_speed_time == units::SECONDS);
-	ui.velocitySlider->setValue(prefs.animation_speed);
-
-	QSortFilterProxyModel *filterModel = new QSortFilterProxyModel();
-	filterModel->setSourceModel(LanguageModel::instance());
-	filterModel->setFilterCaseSensitivity(Qt::CaseInsensitive);
-	ui.languageView->setModel(filterModel);
-	filterModel->sort(0);
-	connect(ui.languageFilter, SIGNAL(textChanged(QString)), filterModel, SLOT(setFilterFixedString(QString)));
-
-	QSettings s;
-
-	ui.save_uid_local->setChecked(s.value("save_uid_local").toBool());
-	ui.default_uid->setText(s.value("subsurface_webservice_uid").toString().toUpper());
-
-	s.beginGroup("Language");
-	ui.languageSystemDefault->setChecked(s.value("UseSystemLanguage", true).toBool());
-	QAbstractItemModel *m = ui.languageView->model();
-	QModelIndexList languages = m->match(m->index(0, 0), Qt::UserRole, s.value("UiLanguage").toString());
-	if (languages.count())
-		ui.languageView->setCurrentIndex(languages.first());
-
-	s.endGroup();
-
-	ui.proxyHost->setText(prefs.proxy_host);
-	ui.proxyPort->setValue(prefs.proxy_port);
-	ui.proxyAuthRequired->setChecked(prefs.proxy_auth);
-	ui.proxyUsername->setText(prefs.proxy_user);
-	ui.proxyPassword->setText(prefs.proxy_pass);
-	ui.proxyType->setCurrentIndex(ui.proxyType->findData(prefs.proxy_type));
-	ui.btnUseDefaultFile->setChecked(prefs.use_default_file);
-
-	ui.cloud_storage_email->setText(prefs.cloud_storage_email);
-	ui.cloud_storage_password->setText(prefs.cloud_storage_password);
-	ui.save_password_local->setChecked(prefs.save_password_local);
-	cloudPinNeeded();
-	ui.cloud_background_sync->setChecked(prefs.cloud_background_sync);
-	ui.default_uid->setText(prefs.userid);
-
-	// GeoManagement
-#ifdef DISABLED
-	ui.enable_geocoding->setChecked( prefs.geocoding.enable_geocoding );
-	ui.parse_without_gps->setChecked(prefs.geocoding.parse_dive_without_gps);
-	ui.tag_existing_dives->setChecked(prefs.geocoding.tag_existing_dives);
-#endif
-	ui.first_item->setCurrentIndex(prefs.geocoding.category[0]);
-	ui.second_item->setCurrentIndex(prefs.geocoding.category[1]);
-	ui.third_item->setCurrentIndex(prefs.geocoding.category[2]);
-}
-
-void PreferencesDialog::restorePrefs()
-{
-	prefs = oldPrefs;
-	setUiFromPrefs();
-}
-
-void PreferencesDialog::rememberPrefs()
-{
-	oldPrefs = prefs;
-}
-
-void PreferencesDialog::syncSettings()
-{
-	QSettings s;
-
-	s.setValue("subsurface_webservice_uid", ui.default_uid->text().toUpper());
-	set_save_userid_local(ui.save_uid_local->checkState());
-
-	// Graph
-	s.beginGroup("TecDetails");
-	SAVE_OR_REMOVE("phethreshold", default_prefs.pp_graphs.phe_threshold, ui.pheThreshold->value());
-	SAVE_OR_REMOVE("po2threshold", default_prefs.pp_graphs.po2_threshold, ui.po2Threshold->value());
-	SAVE_OR_REMOVE("pn2threshold", default_prefs.pp_graphs.pn2_threshold, ui.pn2Threshold->value());
-	SAVE_OR_REMOVE("modpO2", default_prefs.modpO2, ui.maxpo2->value());
-	SAVE_OR_REMOVE("redceiling", default_prefs.redceiling, ui.red_ceiling->isChecked());
-	SAVE_OR_REMOVE("gflow", default_prefs.gflow, ui.gflow->value());
-	SAVE_OR_REMOVE("gfhigh", default_prefs.gfhigh, ui.gfhigh->value());
-	SAVE_OR_REMOVE("gf_low_at_maxdepth", default_prefs.gf_low_at_maxdepth, ui.gf_low_at_maxdepth->isChecked());
-	SAVE_OR_REMOVE("show_ccr_setpoint", default_prefs.show_ccr_setpoint, ui.show_ccr_setpoint->isChecked());
-	SAVE_OR_REMOVE("show_ccr_sensors", default_prefs.show_ccr_sensors, ui.show_ccr_sensors->isChecked());
-	SAVE_OR_REMOVE("display_unused_tanks", default_prefs.display_unused_tanks, ui.display_unused_tanks->isChecked());
-	SAVE_OR_REMOVE("show_average_depth", default_prefs.show_average_depth, ui.show_average_depth->isChecked());
-	s.endGroup();
-
-	// Units
-	s.beginGroup("Units");
-	QString unitSystem[] = {"metric", "imperial", "personal"};
-	short unitValue = ui.metric->isChecked() ? METRIC : (ui.imperial->isChecked() ? IMPERIAL : PERSONALIZE);
-	SAVE_OR_REMOVE_SPECIAL("unit_system", default_prefs.unit_system, unitValue, unitSystem[unitValue]);
-	s.setValue("temperature", ui.fahrenheit->isChecked() ? units::FAHRENHEIT : units::CELSIUS);
-	s.setValue("length", ui.feet->isChecked() ? units::FEET : units::METERS);
-	s.setValue("pressure", ui.psi->isChecked() ? units::PSI : units::BAR);
-	s.setValue("volume", ui.cuft->isChecked() ? units::CUFT : units::LITER);
-	s.setValue("weight", ui.lbs->isChecked() ? units::LBS : units::KG);
-	s.setValue("vertical_speed_time", ui.vertical_speed_minutes->isChecked() ? units::MINUTES : units::SECONDS);
-	s.setValue("coordinates", ui.gpsTraditional->isChecked());
-	s.endGroup();
-
-	// Defaults
-	s.beginGroup("GeneralSettings");
-	s.setValue("default_filename", ui.defaultfilename->text());
-	s.setValue("default_cylinder", ui.default_cylinder->currentText());
-	s.setValue("use_default_file", ui.btnUseDefaultFile->isChecked());
-	if (ui.noDefaultFile->isChecked())
-		s.setValue("default_file_behavior", NO_DEFAULT_FILE);
-	else if (ui.localDefaultFile->isChecked())
-		s.setValue("default_file_behavior", LOCAL_DEFAULT_FILE);
-	else if (ui.cloudDefaultFile->isChecked())
-		s.setValue("default_file_behavior", CLOUD_DEFAULT_FILE);
-	s.setValue("defaultsetpoint", rint(ui.defaultSetpoint->value() * 1000.0));
-	s.setValue("o2consumption", rint(ui.psro2rate->value() *1000.0));
-	s.setValue("pscr_ratio", rint(1000.0 / ui.pscrfactor->value()));
-	s.endGroup();
-
-	s.beginGroup("Display");
-	SAVE_OR_REMOVE_SPECIAL("divelist_font", system_divelist_default_font, ui.font->currentFont().toString(), ui.font->currentFont());
-	SAVE_OR_REMOVE("font_size", system_divelist_default_font_size, ui.fontsize->value());
-	s.setValue("displayinvalid", ui.displayinvalid->isChecked());
-	s.endGroup();
-	s.sync();
-
-	// Locale
-	QLocale loc;
-	s.beginGroup("Language");
-	bool useSystemLang = s.value("UseSystemLanguage", true).toBool();
-	if (useSystemLang != ui.languageSystemDefault->isChecked() ||
-	    (!useSystemLang && s.value("UiLanguage").toString() != ui.languageView->currentIndex().data(Qt::UserRole))) {
-		QMessageBox::warning(MainWindow::instance(), tr("Restart required"),
-				     tr("To correctly load a new language you must restart Subsurface."));
-	}
-	s.setValue("UseSystemLanguage", ui.languageSystemDefault->isChecked());
-	s.setValue("UiLanguage", ui.languageView->currentIndex().data(Qt::UserRole));
-	s.endGroup();
-
-	// Animation
-	s.beginGroup("Animations");
-	s.setValue("animation_speed", ui.velocitySlider->value());
-	s.endGroup();
-
-	s.beginGroup("Network");
-	s.setValue("proxy_type", ui.proxyType->itemData(ui.proxyType->currentIndex()).toInt());
-	s.setValue("proxy_host", ui.proxyHost->text());
-	s.setValue("proxy_port", ui.proxyPort->value());
-	SB("proxy_auth", ui.proxyAuthRequired);
-	s.setValue("proxy_user", ui.proxyUsername->text());
-	s.setValue("proxy_pass", ui.proxyPassword->text());
-	s.endGroup();
-
-	s.beginGroup("CloudStorage");
-	QString email = ui.cloud_storage_email->text();
-	QString password = ui.cloud_storage_password->text();
-	QString newpassword = ui.cloud_storage_new_passwd->text();
-	if (prefs.cloud_verification_status == CS_VERIFIED && !newpassword.isEmpty()) {
-		// deal with password change
-		if (!email.isEmpty() && !password.isEmpty()) {
-			// connect to backend server to check / create credentials
-			QRegularExpression reg("^[a-zA-Z0-9@.+_-]+$");
-			if (!reg.match(email).hasMatch() || (!password.isEmpty() && !reg.match(password).hasMatch())) {
-				report_error(qPrintable(tr("Cloud storage email and password can only consist of letters, numbers, and '.', '-', '_', and '+'.")));
-			} else {
-				CloudStorageAuthenticate *cloudAuth = new CloudStorageAuthenticate(this);
-				connect(cloudAuth, SIGNAL(finishedAuthenticate()), this, SLOT(cloudPinNeeded()));
-				connect(cloudAuth, SIGNAL(passwordChangeSuccessful()), this, SLOT(passwordUpdateSuccessfull()));
-				QNetworkReply *reply = cloudAuth->backend(email, password, "", newpassword);
-				ui.cloud_storage_new_passwd->setText("");
-				free(prefs.cloud_storage_newpassword);
-				prefs.cloud_storage_newpassword = strdup(qPrintable(newpassword));
-			}
-		}
-	} else if (prefs.cloud_verification_status == CS_UNKNOWN ||
-		   prefs.cloud_verification_status == CS_INCORRECT_USER_PASSWD ||
-		   email != prefs.cloud_storage_email ||
-		   password != prefs.cloud_storage_password) {
-
-		// different credentials - reset verification status
-		prefs.cloud_verification_status = CS_UNKNOWN;
-		if (!email.isEmpty() && !password.isEmpty()) {
-			// connect to backend server to check / create credentials
-			QRegularExpression reg("^[a-zA-Z0-9@.+_-]+$");
-			if (!reg.match(email).hasMatch() || (!password.isEmpty() && !reg.match(password).hasMatch())) {
-				report_error(qPrintable(tr("Cloud storage email and password can only consist of letters, numbers, and '.', '-', '_', and '+'.")));
-			} else {
-				CloudStorageAuthenticate *cloudAuth = new CloudStorageAuthenticate(this);
-				connect(cloudAuth, SIGNAL(finishedAuthenticate()), this, SLOT(cloudPinNeeded()));
-				QNetworkReply *reply = cloudAuth->backend(email, password);
-			}
-		}
-	} else if (prefs.cloud_verification_status == CS_NEED_TO_VERIFY) {
-		QString pin = ui.cloud_storage_pin->text();
-		if (!pin.isEmpty()) {
-			// connect to backend server to check / create credentials
-			QRegularExpression reg("^[a-zA-Z0-9@.+_-]+$");
-			if (!reg.match(email).hasMatch() || !reg.match(password).hasMatch()) {
-				report_error(qPrintable(tr("Cloud storage email and password can only consist of letters, numbers, and '.', '-', '_', and '+'.")));
-			}
-			CloudStorageAuthenticate *cloudAuth = new CloudStorageAuthenticate(this);
-			connect(cloudAuth, SIGNAL(finishedAuthenticate()), this, SLOT(cloudPinNeeded()));
-			QNetworkReply *reply = cloudAuth->backend(email, password, pin);
-		}
-	}
-	SAVE_OR_REMOVE("email", default_prefs.cloud_storage_email, email);
-	SAVE_OR_REMOVE("save_password_local", default_prefs.save_password_local, ui.save_password_local->isChecked());
-	if (ui.save_password_local->isChecked()) {
-		SAVE_OR_REMOVE("password", default_prefs.cloud_storage_password, password);
-	} else {
-		s.remove("password");
-		free(prefs.cloud_storage_password);
-		prefs.cloud_storage_password = strdup(qPrintable(password));
-	}
-	SAVE_OR_REMOVE("cloud_verification_status", default_prefs.cloud_verification_status, prefs.cloud_verification_status);
-	SAVE_OR_REMOVE("cloud_background_sync", default_prefs.cloud_background_sync, ui.cloud_background_sync->isChecked());
-
-	// at this point we intentionally do not have a UI for changing this
-	// it could go into some sort of "advanced setup" or something
-	SAVE_OR_REMOVE("cloud_base_url", default_prefs.cloud_base_url, prefs.cloud_base_url);
-	s.endGroup();
-
-	s.beginGroup("geocoding");
-#ifdef DISABLED
-	s.setValue("enable_geocoding", ui.enable_geocoding->isChecked());
-	s.setValue("parse_dive_without_gps", ui.parse_without_gps->isChecked());
-	s.setValue("tag_existing_dives", ui.tag_existing_dives->isChecked());
-#endif
-	s.setValue("cat0", ui.first_item->currentIndex());
-	s.setValue("cat1", ui.second_item->currentIndex());
-	s.setValue("cat2", ui.third_item->currentIndex());
-	s.endGroup();
-
-	loadSettings();
-	emit settingsChanged();
-}
-
-void PreferencesDialog::loadSettings()
-{
-	// This code was on the mainwindow, it should belong nowhere, but since we didn't
-	// correctly fixed this code yet ( too much stuff on the code calling preferences )
-	// force this here.
-	loadPreferences();
-	QSettings s;
-	QVariant v;
-
-	ui.save_uid_local->setChecked(s.value("save_uid_local").toBool());
-	ui.default_uid->setText(s.value("subsurface_webservice_uid").toString().toUpper());
-
-	ui.defaultfilename->setEnabled(prefs.default_file_behavior == LOCAL_DEFAULT_FILE);
-	ui.btnUseDefaultFile->setEnabled(prefs.default_file_behavior == LOCAL_DEFAULT_FILE);
-	ui.chooseFile->setEnabled(prefs.default_file_behavior == LOCAL_DEFAULT_FILE);
-}
-
-void PreferencesDialog::buttonClicked(QAbstractButton *button)
-{
-	switch (ui.buttonBox->standardButton(button)) {
-	case QDialogButtonBox::Discard:
-		restorePrefs();
-		syncSettings();
-		close();
-		break;
-	case QDialogButtonBox::Apply:
-		syncSettings();
-		break;
-	case QDialogButtonBox::FirstButton:
-		syncSettings();
-		close();
-		break;
-	default:
-		break; // ignore warnings.
-	}
-}
-#undef SB
-
-void PreferencesDialog::on_chooseFile_clicked()
-{
-	QFileInfo fi(system_default_filename());
-	QString choosenFileName = QFileDialog::getOpenFileName(this, tr("Open default log file"), fi.absolutePath(), tr("Subsurface XML files (*.ssrf *.xml *.XML)"));
-
-	if (!choosenFileName.isEmpty())
-		ui.defaultfilename->setText(choosenFileName);
-}
-
-void PreferencesDialog::on_resetSettings_clicked()
-{
-	QSettings s;
-
-	QMessageBox response(this);
-	response.setStandardButtons(QMessageBox::Ok | QMessageBox::Cancel);
-	response.setDefaultButton(QMessageBox::Cancel);
-	response.setWindowTitle(tr("Warning"));
-	response.setText(tr("If you click OK, all settings of Subsurface will be reset to their default values. This will be applied immediately."));
-	response.setWindowModality(Qt::WindowModal);
-
-	int result = response.exec();
-	if (result == QMessageBox::Ok) {
-		copy_prefs(&default_prefs, &prefs);
-		setUiFromPrefs();
-		Q_FOREACH (QString key, s.allKeys()) {
-			s.remove(key);
-		}
-		syncSettings();
-		close();
-	}
-}
-
-void PreferencesDialog::passwordUpdateSuccessfull()
-{
-	ui.cloud_storage_password->setText(prefs.cloud_storage_password);
-}
-
-void PreferencesDialog::emitSettingsChanged()
-{
-	emit settingsChanged();
-}
-
-void PreferencesDialog::proxyType_changed(int idx)
-{
-	if (idx == -1) {
-		return;
-	}
-
-	int proxyType = ui.proxyType->itemData(idx).toInt();
-	bool hpEnabled = (proxyType == QNetworkProxy::Socks5Proxy || proxyType == QNetworkProxy::HttpProxy);
-	ui.proxyHost->setEnabled(hpEnabled);
-	ui.proxyPort->setEnabled(hpEnabled);
-	ui.proxyAuthRequired->setEnabled(hpEnabled);
-	ui.proxyUsername->setEnabled(hpEnabled & ui.proxyAuthRequired->isChecked());
-	ui.proxyPassword->setEnabled(hpEnabled & ui.proxyAuthRequired->isChecked());
-	ui.proxyAuthRequired->setChecked(ui.proxyAuthRequired->isChecked());
-}
-
-void PreferencesDialog::on_btnUseDefaultFile_toggled(bool toggle)
-{
-	if (toggle) {
-		ui.defaultfilename->setText(system_default_filename());
-		ui.defaultfilename->setEnabled(false);
-	} else {
-		ui.defaultfilename->setEnabled(true);
-	}
-}
-
-void PreferencesDialog::on_noDefaultFile_toggled(bool toggle)
-{
-	prefs.default_file_behavior = NO_DEFAULT_FILE;
-}
-
-void PreferencesDialog::on_localDefaultFile_toggled(bool toggle)
-{
-	ui.defaultfilename->setEnabled(toggle);
-	ui.btnUseDefaultFile->setEnabled(toggle);
-	ui.chooseFile->setEnabled(toggle);
-	prefs.default_file_behavior = LOCAL_DEFAULT_FILE;
-}
-
-void PreferencesDialog::on_cloudDefaultFile_toggled(bool toggle)
-{
-	prefs.default_file_behavior = CLOUD_DEFAULT_FILE;
-}
diff --git a/qt-ui/preferences.h b/qt-ui/preferences.h
deleted file mode 100644
index 326b1f964..000000000
--- a/qt-ui/preferences.h
+++ /dev/null
@@ -1,54 +0,0 @@
-#ifndef PREFERENCES_H
-#define PREFERENCES_H
-
-#include <QDialog>
-#include "pref.h"
-
-#include "ui_preferences.h"
-
-#ifndef Q_OS_ANDROID
-	class QWebView;
-#endif
-
-class QAbstractButton;
-
-class PreferencesDialog : public QDialog {
-	Q_OBJECT
-public:
-	static PreferencesDialog *instance();
-	void showEvent(QShowEvent *);
-	void emitSettingsChanged();
-
-signals:
-	void settingsChanged();
-public
-slots:
-	void buttonClicked(QAbstractButton *button);
-	void on_chooseFile_clicked();
-	void on_resetSettings_clicked();
-	void syncSettings();
-	void loadSettings();
-	void restorePrefs();
-	void rememberPrefs();
-	void gflowChanged(int gf);
-	void gfhighChanged(int gf);
-	void proxyType_changed(int idx);
-	void on_btnUseDefaultFile_toggled(bool toggle);
-	void on_noDefaultFile_toggled(bool toggle);
-	void on_localDefaultFile_toggled(bool toggle);
-	void on_cloudDefaultFile_toggled(bool toggle);
-	void facebookLoggedIn();
-	void facebookDisconnect();
-	void cloudPinNeeded();
-	void passwordUpdateSuccessfull();
-private:
-	explicit PreferencesDialog(QWidget *parent = 0, Qt::WindowFlags f = 0);
-	void setUiFromPrefs();
-	Ui::PreferencesDialog ui;
-	struct preferences oldPrefs;
-    #ifndef Q_OS_ANDROID
-	QWebView *facebookWebView;
-    #endif
-};
-
-#endif // PREFERENCES_H
diff --git a/qt-ui/preferences.ui b/qt-ui/preferences.ui
deleted file mode 100644
index de2d79b91..000000000
--- a/qt-ui/preferences.ui
+++ /dev/null
@@ -1,1883 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<ui version="4.0">
- <class>PreferencesDialog</class>
- <widget class="QDialog" name="PreferencesDialog">
-  <property name="geometry">
-   <rect>
-    <x>0</x>
-    <y>0</y>
-    <width>711</width>
-    <height>662</height>
-   </rect>
-  </property>
-  <property name="windowTitle">
-   <string>Preferences</string>
-  </property>
-  <property name="windowIcon">
-   <iconset>
-    <normalon>:/subsurface-icon</normalon>
-   </iconset>
-  </property>
-  <layout class="QVBoxLayout" name="verticalLayout_2">
-   <property name="margin">
-    <number>5</number>
-   </property>
-   <item>
-    <layout class="QHBoxLayout" name="mainHorizontalLayout">
-     <item>
-      <widget class="QListWidget" name="listWidget">
-       <property name="sizePolicy">
-        <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
-         <horstretch>0</horstretch>
-         <verstretch>0</verstretch>
-        </sizepolicy>
-       </property>
-       <property name="minimumSize">
-        <size>
-         <width>120</width>
-         <height>0</height>
-        </size>
-       </property>
-       <property name="maximumSize">
-        <size>
-         <width>120</width>
-         <height>16777215</height>
-        </size>
-       </property>
-       <property name="iconSize">
-        <size>
-         <width>24</width>
-         <height>24</height>
-        </size>
-       </property>
-       <property name="textElideMode">
-        <enum>Qt::ElideNone</enum>
-       </property>
-       <property name="movement">
-        <enum>QListView::Static</enum>
-       </property>
-       <property name="isWrapping" stdset="0">
-        <bool>true</bool>
-       </property>
-       <property name="layoutMode">
-        <enum>QListView::Batched</enum>
-       </property>
-       <property name="spacing">
-        <number>0</number>
-       </property>
-       <property name="gridSize">
-        <size>
-         <width>110</width>
-         <height>40</height>
-        </size>
-       </property>
-       <property name="viewMode">
-        <enum>QListView::ListMode</enum>
-       </property>
-       <property name="uniformItemSizes">
-        <bool>true</bool>
-       </property>
-       <property name="wordWrap">
-        <bool>true</bool>
-       </property>
-       <property name="currentRow">
-        <number>-1</number>
-       </property>
-       <item>
-        <property name="text">
-         <string>Defaults</string>
-        </property>
-        <property name="icon">
-         <iconset>
-          <normalon>:/subsurface-icon</normalon>
-         </iconset>
-        </property>
-       </item>
-       <item>
-        <property name="text">
-         <string>Units</string>
-        </property>
-        <property name="icon">
-         <iconset>
-          <normalon>:/units</normalon>
-         </iconset>
-        </property>
-       </item>
-       <item>
-        <property name="text">
-         <string>Graph</string>
-        </property>
-        <property name="icon">
-         <iconset>
-          <normalon>:/graph</normalon>
-         </iconset>
-        </property>
-       </item>
-       <item>
-        <property name="text">
-         <string>Language</string>
-        </property>
-        <property name="icon">
-         <iconset>
-          <normalon>:/advanced</normalon>
-         </iconset>
-        </property>
-       </item>
-       <item>
-        <property name="text">
-         <string>Network</string>
-        </property>
-        <property name="icon">
-         <iconset>
-          <normalon>:/network</normalon>
-         </iconset>
-        </property>
-       </item>
-       <item>
-        <property name="text">
-         <string>Facebook</string>
-        </property>
-        <property name="icon">
-         <iconset>
-          <normalon>:/facebook</normalon>
-         </iconset>
-        </property>
-       </item>
-       <item>
-        <property name="text">
-         <string>Georeference</string>
-        </property>
-        <property name="icon">
-         <iconset>
-          <normalon>:/georeference</normalon>
-         </iconset>
-        </property>
-       </item>
-      </widget>
-     </item>
-     <item>
-      <widget class="QStackedWidget" name="stackedWidget">
-       <property name="sizePolicy">
-        <sizepolicy hsizetype="MinimumExpanding" vsizetype="MinimumExpanding">
-         <horstretch>0</horstretch>
-         <verstretch>0</verstretch>
-        </sizepolicy>
-       </property>
-       <property name="currentIndex">
-        <number>4</number>
-       </property>
-       <widget class="QWidget" name="defaults_page">
-        <property name="sizePolicy">
-         <sizepolicy hsizetype="Preferred" vsizetype="MinimumExpanding">
-          <horstretch>0</horstretch>
-          <verstretch>0</verstretch>
-         </sizepolicy>
-        </property>
-        <layout class="QVBoxLayout" name="verticalLayout_3">
-         <property name="spacing">
-          <number>5</number>
-         </property>
-         <property name="margin">
-          <number>5</number>
-         </property>
-         <item>
-          <widget class="QGroupBox" name="groupBox_2">
-           <property name="title">
-            <string>Lists and tables</string>
-           </property>
-           <layout class="QHBoxLayout" name="horizontalLayout_11">
-            <property name="margin">
-             <number>5</number>
-            </property>
-            <item>
-             <widget class="QLabel" name="label_7">
-              <property name="text">
-               <string>Font</string>
-              </property>
-             </widget>
-            </item>
-            <item>
-             <widget class="QFontComboBox" name="font"/>
-            </item>
-            <item>
-             <widget class="QLabel" name="label_8">
-              <property name="text">
-               <string>Font size</string>
-              </property>
-             </widget>
-            </item>
-            <item>
-             <widget class="QDoubleSpinBox" name="fontsize"/>
-            </item>
-           </layout>
-          </widget>
-         </item>
-         <item>
-          <widget class="QGroupBox" name="groupBox_3">
-           <property name="title">
-            <string>Dives</string>
-           </property>
-           <layout class="QFormLayout" name="formLayout">
-            <property name="horizontalSpacing">
-             <number>5</number>
-            </property>
-            <property name="verticalSpacing">
-             <number>5</number>
-            </property>
-            <property name="margin">
-             <number>5</number>
-            </property>
-            <item row="0" column="0">
-             <widget class="QLabel" name="defaultDiveLogFileLabel">
-              <property name="text">
-               <string>Default dive log file</string>
-              </property>
-             </widget>
-            </item>
-            <item row="0" column="1">
-             <layout class="QHBoxLayout" name="defaultFileBehaviorLayout">
-              <item>
-               <widget class="QRadioButton" name="noDefaultFile">
-                <property name="text">
-                 <string>No default file</string>
-                </property>
-                <attribute name="buttonGroup">
-                 <string notr="true">defaultFileGroup</string>
-                </attribute>
-               </widget>
-              </item>
-              <item>
-               <widget class="QRadioButton" name="localDefaultFile">
-                <property name="text">
-                 <string>&amp;Local default file</string>
-                </property>
-                <attribute name="buttonGroup">
-                 <string notr="true">defaultFileGroup</string>
-                </attribute>
-               </widget>
-              </item>
-              <item>
-               <widget class="QRadioButton" name="cloudDefaultFile">
-                <property name="text">
-                 <string>Clo&amp;ud storage default file</string>
-                </property>
-                <attribute name="buttonGroup">
-                 <string notr="true">defaultFileGroup</string>
-                </attribute>
-               </widget>
-              </item>
-             </layout>
-            </item>
-            <item row="1" column="0">
-             <widget class="QLabel" name="label_9">
-              <property name="text">
-               <string>Local dive log file</string>
-              </property>
-             </widget>
-            </item>
-            <item row="1" column="1">
-             <layout class="QHBoxLayout" name="horizontalLayout_3b">
-              <item>
-               <widget class="QLineEdit" name="defaultfilename"/>
-              </item>
-              <item>
-               <widget class="QToolButton" name="btnUseDefaultFile">
-                <property name="text">
-                 <string>Use default</string>
-                </property>
-                <property name="checkable">
-                 <bool>true</bool>
-                </property>
-               </widget>
-              </item>
-              <item>
-               <widget class="QToolButton" name="chooseFile">
-                <property name="text">
-                 <string>...</string>
-                </property>
-               </widget>
-              </item>
-             </layout>
-            </item>
-            <item row="2" column="0">
-             <widget class="QLabel" name="label_10">
-              <property name="text">
-               <string>Display invalid</string>
-              </property>
-             </widget>
-            </item>
-            <item row="2" column="1">
-             <widget class="QCheckBox" name="displayinvalid">
-              <property name="text">
-               <string/>
-              </property>
-             </widget>
-            </item>
-           </layout>
-          </widget>
-         </item>
-         <item>
-          <widget class="QGroupBox" name="groupBox_6">
-           <property name="title">
-            <string>Default cylinder</string>
-           </property>
-           <layout class="QFormLayout" name="formLayout_6">
-            <property name="horizontalSpacing">
-             <number>5</number>
-            </property>
-            <property name="verticalSpacing">
-             <number>5</number>
-            </property>
-            <property name="margin">
-             <number>5</number>
-            </property>
-            <item row="0" column="0">
-             <widget class="QLabel" name="label_11">
-              <property name="text">
-               <string>Use default cylinder</string>
-              </property>
-             </widget>
-            </item>
-            <item row="0" column="1">
-             <layout class="QHBoxLayout" name="horizontalLayout_3">
-              <item>
-               <widget class="QComboBox" name="default_cylinder"/>
-              </item>
-             </layout>
-            </item>
-           </layout>
-          </widget>
-         </item>
-         <item>
-          <widget class="QGroupBox" name="groupBox_7">
-           <property name="title">
-            <string>Animations</string>
-           </property>
-           <layout class="QHBoxLayout" name="horizontalLayout_7">
-            <property name="margin">
-             <number>5</number>
-            </property>
-            <item>
-             <widget class="QLabel" name="label_15">
-              <property name="text">
-               <string>Speed</string>
-              </property>
-             </widget>
-            </item>
-            <item>
-             <widget class="QSlider" name="velocitySlider">
-              <property name="maximum">
-               <number>500</number>
-              </property>
-              <property name="orientation">
-               <enum>Qt::Horizontal</enum>
-              </property>
-             </widget>
-            </item>
-            <item>
-             <widget class="QSpinBox" name="velocitySpinBox">
-              <property name="maximum">
-               <number>500</number>
-              </property>
-             </widget>
-            </item>
-           </layout>
-          </widget>
-         </item>
-         <item>
-          <widget class="QGroupBox" name="groupBox_9">
-           <property name="title">
-            <string>Clear all settings</string>
-           </property>
-           <layout class="QVBoxLayout" name="verticalLayout_7b">
-            <property name="spacing">
-             <number>5</number>
-            </property>
-            <property name="margin">
-             <number>5</number>
-            </property>
-            <item>
-             <widget class="QPushButton" name="resetSettings">
-              <property name="text">
-               <string>Reset all settings to their default value</string>
-              </property>
-             </widget>
-            </item>
-           </layout>
-          </widget>
-         </item>
-         <item>
-          <spacer name="verticalSpacer_2">
-           <property name="orientation">
-            <enum>Qt::Vertical</enum>
-           </property>
-           <property name="sizeHint" stdset="0">
-            <size>
-             <width>0</width>
-             <height>0</height>
-            </size>
-           </property>
-          </spacer>
-         </item>
-        </layout>
-       </widget>
-       <widget class="QWidget" name="units_page">
-        <property name="sizePolicy">
-         <sizepolicy hsizetype="Preferred" vsizetype="MinimumExpanding">
-          <horstretch>0</horstretch>
-          <verstretch>0</verstretch>
-         </sizepolicy>
-        </property>
-        <layout class="QVBoxLayout" name="verticalLayout">
-         <property name="spacing">
-          <number>5</number>
-         </property>
-         <property name="margin">
-          <number>5</number>
-         </property>
-         <item>
-          <widget class="QGroupBox" name="groupBox_units">
-           <property name="title">
-            <string>Unit system</string>
-           </property>
-           <layout class="QHBoxLayout" name="horizontalLayout">
-            <item>
-             <widget class="QLabel" name="label_6">
-              <property name="text">
-               <string>System</string>
-              </property>
-             </widget>
-            </item>
-            <item>
-             <widget class="QRadioButton" name="metric">
-              <property name="text">
-               <string>&amp;Metric</string>
-              </property>
-              <attribute name="buttonGroup">
-               <string notr="true">buttonGroup_6</string>
-              </attribute>
-             </widget>
-            </item>
-            <item>
-             <widget class="QRadioButton" name="imperial">
-              <property name="text">
-               <string>Imperial</string>
-              </property>
-              <attribute name="buttonGroup">
-               <string notr="true">buttonGroup_6</string>
-              </attribute>
-             </widget>
-            </item>
-            <item>
-             <widget class="QRadioButton" name="personalize">
-              <property name="text">
-               <string>Personali&amp;ze</string>
-              </property>
-              <attribute name="buttonGroup">
-               <string notr="true">buttonGroup_6</string>
-              </attribute>
-             </widget>
-            </item>
-           </layout>
-          </widget>
-         </item>
-         <item>
-          <widget class="QGroupBox" name="units_group">
-           <property name="title">
-            <string>Individual settings</string>
-           </property>
-           <property name="checkable">
-            <bool>false</bool>
-           </property>
-           <property name="checked">
-            <bool>false</bool>
-           </property>
-           <layout class="QGridLayout" name="gridLayout">
-            <item row="0" column="0">
-             <widget class="QLabel" name="label">
-              <property name="text">
-               <string>Depth</string>
-              </property>
-             </widget>
-            </item>
-            <item row="0" column="1">
-             <widget class="QRadioButton" name="meter">
-              <property name="text">
-               <string>meter</string>
-              </property>
-              <attribute name="buttonGroup">
-               <string notr="true">buttonGroup</string>
-              </attribute>
-             </widget>
-            </item>
-            <item row="0" column="2">
-             <widget class="QRadioButton" name="feet">
-              <property name="text">
-               <string>feet</string>
-              </property>
-              <attribute name="buttonGroup">
-               <string notr="true">buttonGroup</string>
-              </attribute>
-             </widget>
-            </item>
-            <item row="1" column="0">
-             <widget class="QLabel" name="label_2">
-              <property name="text">
-               <string>Pressure</string>
-              </property>
-             </widget>
-            </item>
-            <item row="1" column="1">
-             <widget class="QRadioButton" name="bar">
-              <property name="text">
-               <string>bar</string>
-              </property>
-              <attribute name="buttonGroup">
-               <string notr="true">buttonGroup_2</string>
-              </attribute>
-             </widget>
-            </item>
-            <item row="1" column="2">
-             <widget class="QRadioButton" name="psi">
-              <property name="text">
-               <string>psi</string>
-              </property>
-              <attribute name="buttonGroup">
-               <string notr="true">buttonGroup_2</string>
-              </attribute>
-             </widget>
-            </item>
-            <item row="2" column="0">
-             <widget class="QLabel" name="label_3">
-              <property name="text">
-               <string>Volume</string>
-              </property>
-             </widget>
-            </item>
-            <item row="2" column="1">
-             <widget class="QRadioButton" name="liter">
-              <property name="text">
-               <string>&amp;liter</string>
-              </property>
-              <attribute name="buttonGroup">
-               <string notr="true">buttonGroup_3</string>
-              </attribute>
-             </widget>
-            </item>
-            <item row="2" column="2">
-             <widget class="QRadioButton" name="cuft">
-              <property name="text">
-               <string>cu ft</string>
-              </property>
-              <attribute name="buttonGroup">
-               <string notr="true">buttonGroup_3</string>
-              </attribute>
-             </widget>
-            </item>
-            <item row="3" column="0">
-             <widget class="QLabel" name="label_4">
-              <property name="text">
-               <string>Temperature</string>
-              </property>
-             </widget>
-            </item>
-            <item row="3" column="1">
-             <widget class="QRadioButton" name="celsius">
-              <property name="text">
-               <string>celsius</string>
-              </property>
-              <attribute name="buttonGroup">
-               <string notr="true">buttonGroup_4</string>
-              </attribute>
-             </widget>
-            </item>
-            <item row="3" column="2">
-             <widget class="QRadioButton" name="fahrenheit">
-              <property name="text">
-               <string>fahrenheit</string>
-              </property>
-              <attribute name="buttonGroup">
-               <string notr="true">buttonGroup_4</string>
-              </attribute>
-             </widget>
-            </item>
-            <item row="4" column="0">
-             <widget class="QLabel" name="label_5">
-              <property name="text">
-               <string>Weight</string>
-              </property>
-             </widget>
-            </item>
-            <item row="4" column="1">
-             <widget class="QRadioButton" name="kg">
-              <property name="text">
-               <string>kg</string>
-              </property>
-              <attribute name="buttonGroup">
-               <string notr="true">buttonGroup_5</string>
-              </attribute>
-             </widget>
-            </item>
-            <item row="4" column="2">
-             <widget class="QRadioButton" name="lbs">
-              <property name="text">
-               <string>lbs</string>
-              </property>
-              <attribute name="buttonGroup">
-               <string notr="true">buttonGroup_5</string>
-              </attribute>
-             </widget>
-            </item>
-           </layout>
-          </widget>
-         </item>
-         <item>
-          <layout class="QHBoxLayout">
-           <item>
-            <widget class="QGroupBox" name="groupBox">
-             <property name="title">
-              <string>Time units</string>
-             </property>
-             <layout class="QGridLayout">
-              <item row="0" column="0">
-               <widget class="QLabel" name="label13">
-                <property name="text">
-                 <string>Ascent/descent speed denominator</string>
-                </property>
-               </widget>
-              </item>
-              <item row="0" column="1">
-               <widget class="QRadioButton" name="vertical_speed_minutes">
-                <property name="text">
-                 <string>Minutes</string>
-                </property>
-                <attribute name="buttonGroup">
-                 <string notr="true">verticalSpeed</string>
-                </attribute>
-               </widget>
-              </item>
-              <item row="0" column="2">
-               <widget class="QRadioButton" name="vertical_speed_seconds">
-                <property name="text">
-                 <string>Seconds</string>
-                </property>
-                <attribute name="buttonGroup">
-                 <string notr="true">verticalSpeed</string>
-                </attribute>
-               </widget>
-              </item>
-             </layout>
-            </widget>
-           </item>
-          </layout>
-         </item>
-         <item>
-          <widget class="QGroupBox" name="groupBox_11">
-           <property name="title">
-            <string>GPS coordinates</string>
-           </property>
-           <layout class="QHBoxLayout" name="horizontalLayout_12">
-            <item>
-             <widget class="QLabel" name="label_27">
-              <property name="text">
-               <string>Location Display</string>
-              </property>
-             </widget>
-            </item>
-            <item>
-             <widget class="QRadioButton" name="gpsTraditional">
-              <property name="text">
-               <string>traditional (dms)</string>
-              </property>
-              <attribute name="buttonGroup">
-               <string notr="true">buttonGroup_7</string>
-              </attribute>
-             </widget>
-            </item>
-            <item>
-             <widget class="QRadioButton" name="gpsDecimal">
-              <property name="text">
-               <string>decimal</string>
-              </property>
-              <attribute name="buttonGroup">
-               <string notr="true">buttonGroup_7</string>
-              </attribute>
-             </widget>
-            </item>
-           </layout>
-          </widget>
-         </item>
-         <item>
-          <spacer name="verticalSpacer">
-           <property name="orientation">
-            <enum>Qt::Vertical</enum>
-           </property>
-           <property name="sizeHint" stdset="0">
-            <size>
-             <width>0</width>
-             <height>0</height>
-            </size>
-           </property>
-          </spacer>
-         </item>
-        </layout>
-       </widget>
-       <widget class="QWidget" name="graph_page">
-        <property name="sizePolicy">
-         <sizepolicy hsizetype="Preferred" vsizetype="MinimumExpanding">
-          <horstretch>0</horstretch>
-          <verstretch>0</verstretch>
-         </sizepolicy>
-        </property>
-        <layout class="QVBoxLayout" name="verticalLayout_5">
-         <property name="spacing">
-          <number>5</number>
-         </property>
-         <property name="margin">
-          <number>5</number>
-         </property>
-         <item>
-          <widget class="QGroupBox" name="groupBox_4">
-           <property name="title">
-            <string>Show</string>
-           </property>
-           <layout class="QVBoxLayout" name="verticalLayout_4">
-            <item>
-             <layout class="QHBoxLayout" name="horizontalLayout_4">
-              <item>
-               <widget class="QLabel" name="label_12">
-                <property name="enabled">
-                 <bool>true</bool>
-                </property>
-                <property name="text">
-                 <string>Threshold when showing pO₂</string>
-                </property>
-               </widget>
-              </item>
-              <item>
-               <widget class="QDoubleSpinBox" name="po2Threshold">
-                <property name="enabled">
-                 <bool>true</bool>
-                </property>
-                <property name="singleStep">
-                 <double>0.100000000000000</double>
-                </property>
-               </widget>
-              </item>
-             </layout>
-            </item>
-            <item>
-             <layout class="QHBoxLayout" name="horizontalLayout_5">
-              <item>
-               <widget class="QLabel" name="label_13">
-                <property name="enabled">
-                 <bool>true</bool>
-                </property>
-                <property name="text">
-                 <string>Threshold when showing pN₂</string>
-                </property>
-               </widget>
-              </item>
-              <item>
-               <widget class="QDoubleSpinBox" name="pn2Threshold">
-                <property name="enabled">
-                 <bool>true</bool>
-                </property>
-                <property name="singleStep">
-                 <double>0.100000000000000</double>
-                </property>
-               </widget>
-              </item>
-             </layout>
-            </item>
-            <item>
-             <layout class="QHBoxLayout" name="horizontalLayout_8">
-              <item>
-               <widget class="QLabel" name="label_17">
-                <property name="enabled">
-                 <bool>true</bool>
-                </property>
-                <property name="text">
-                 <string>Threshold when showing pHe</string>
-                </property>
-               </widget>
-              </item>
-              <item>
-               <widget class="QDoubleSpinBox" name="pheThreshold">
-                <property name="enabled">
-                 <bool>true</bool>
-                </property>
-                <property name="singleStep">
-                 <double>0.100000000000000</double>
-                </property>
-               </widget>
-              </item>
-             </layout>
-            </item>
-            <item>
-             <layout class="QHBoxLayout" name="horizontalLayout_9">
-              <item>
-               <widget class="QLabel" name="label_18">
-                <property name="enabled">
-                 <bool>true</bool>
-                </property>
-                <property name="text">
-                 <string>Max pO₂ when showing MOD</string>
-                </property>
-               </widget>
-              </item>
-              <item>
-               <widget class="QDoubleSpinBox" name="maxpo2">
-                <property name="enabled">
-                 <bool>true</bool>
-                </property>
-                <property name="singleStep">
-                 <double>0.100000000000000</double>
-                </property>
-               </widget>
-              </item>
-             </layout>
-            </item>
-            <item>
-             <layout class="QHBoxLayout" name="horizontalLayout_10b">
-              <item>
-               <widget class="QCheckBox" name="red_ceiling">
-                <property name="enabled">
-                 <bool>true</bool>
-                </property>
-                <property name="text">
-                 <string>Draw dive computer reported ceiling red</string>
-                </property>
-               </widget>
-              </item>
-             </layout>
-            </item>
-            <item>
-             <layout class="QHBoxLayout" name="horizontalLayout_11c">
-              <item>
-               <widget class="QCheckBox" name="display_unused_tanks">
-                <property name="text">
-                 <string>Show unused cylinders in Equipment tab</string>
-                </property>
-               </widget>
-              </item>
-             </layout>
-            </item>
-            <item>
-             <layout class="QHBoxLayout" name="horizontalLayout_11d">
-              <item>
-               <widget class="QCheckBox" name="show_average_depth">
-                <property name="text">
-                 <string>Show average depth</string>
-                </property>
-               </widget>
-              </item>
-             </layout>
-            </item>
-           </layout>
-          </widget>
-         </item>
-         <item>
-          <widget class="QGroupBox" name="groupBox_5">
-           <property name="title">
-            <string>Misc</string>
-           </property>
-           <layout class="QFormLayout" name="formLayout_3">
-            <item row="1" column="0">
-             <widget class="QLabel" name="label_19">
-              <property name="text">
-               <string>GFLow</string>
-              </property>
-             </widget>
-            </item>
-            <item row="1" column="1">
-             <widget class="QSpinBox" name="gflow">
-              <property name="minimum">
-               <number>1</number>
-              </property>
-              <property name="maximum">
-               <number>150</number>
-              </property>
-             </widget>
-            </item>
-            <item row="2" column="0">
-             <widget class="QLabel" name="label_20">
-              <property name="text">
-               <string>GFHigh</string>
-              </property>
-             </widget>
-            </item>
-            <item row="2" column="1">
-             <widget class="QSpinBox" name="gfhigh">
-              <property name="minimum">
-               <number>1</number>
-              </property>
-              <property name="maximum">
-               <number>150</number>
-              </property>
-             </widget>
-            </item>
-            <item row="4" column="0" colspan="2">
-             <widget class="QCheckBox" name="gf_low_at_maxdepth">
-              <property name="text">
-               <string>GFLow at max depth</string>
-              </property>
-             </widget>
-            </item>
-            <item row="5" column="0">
-             <widget class="QCheckBox" name="show_ccr_setpoint">
-              <property name="text">
-               <string>CCR: show setpoints when viewing pO₂</string>
-              </property>
-             </widget>
-            </item>
-            <item row="6" column="0">
-             <widget class="QCheckBox" name="show_ccr_sensors">
-              <property name="text">
-               <string>CCR: show individual O₂ sensor values when viewing pO₂</string>
-              </property>
-             </widget>
-            </item>
-            <item row="7" column="0">
-             <widget class="QLabel" name="label_26">
-              <property name="text">
-               <string>Default CCR set-point for dive planning</string>
-              </property>
-             </widget>
-            </item>
-            <item row="7" column="1">
-             <widget class="QDoubleSpinBox" name="defaultSetpoint">
-              <property name="suffix">
-               <string>bar</string>
-              </property>
-              <property name="decimals">
-               <number>2</number>
-              </property>
-              <property name="maximum">
-               <double>10.000000000000000</double>
-              </property>
-              <property name="singleStep">
-               <double>0.100000000000000</double>
-              </property>
-             </widget>
-            </item>
-            <item row="8" column="0">
-             <widget class="QLabel" name="pSCR">
-              <property name="text">
-               <string>pSCR O₂ metabolism rate</string>
-              </property>
-             </widget>
-            </item>
-            <item row="9" column="0">
-             <widget class="QLabel" name="label_28">
-              <property name="text">
-               <string>pSCR ratio</string>
-              </property>
-             </widget>
-            </item>
-            <item row="8" column="1">
-             <widget class="QDoubleSpinBox" name="psro2rate">
-              <property name="suffix">
-               <string>ℓ/min</string>
-              </property>
-              <property name="decimals">
-               <number>3</number>
-              </property>
-             </widget>
-            </item>
-            <item row="9" column="1">
-             <widget class="QSpinBox" name="pscrfactor">
-              <property name="suffix">
-               <string/>
-              </property>
-              <property name="prefix">
-               <string>1:</string>
-              </property>
-             </widget>
-            </item>
-           </layout>
-          </widget>
-         </item>
-         <item>
-          <spacer name="verticalSpacer_5">
-           <property name="orientation">
-            <enum>Qt::Vertical</enum>
-           </property>
-           <property name="sizeHint" stdset="0">
-            <size>
-             <width>0</width>
-             <height>0</height>
-            </size>
-           </property>
-          </spacer>
-         </item>
-        </layout>
-       </widget>
-       <widget class="QWidget" name="language_page">
-        <property name="sizePolicy">
-         <sizepolicy hsizetype="Preferred" vsizetype="MinimumExpanding">
-          <horstretch>0</horstretch>
-          <verstretch>0</verstretch>
-         </sizepolicy>
-        </property>
-        <layout class="QVBoxLayout" name="verticalLayout_6" stretch="0,1,0">
-         <property name="spacing">
-          <number>5</number>
-         </property>
-         <property name="sizeConstraint">
-          <enum>QLayout::SetNoConstraint</enum>
-         </property>
-         <property name="margin">
-          <number>5</number>
-         </property>
-         <item>
-          <widget class="QGroupBox" name="language_group">
-           <property name="sizePolicy">
-            <sizepolicy hsizetype="MinimumExpanding" vsizetype="MinimumExpanding">
-             <horstretch>0</horstretch>
-             <verstretch>0</verstretch>
-            </sizepolicy>
-           </property>
-           <property name="title">
-            <string>UI language</string>
-           </property>
-           <layout class="QHBoxLayout" name="horizontalLayout_6">
-            <item>
-             <widget class="QCheckBox" name="languageSystemDefault">
-              <property name="text">
-               <string>System default</string>
-              </property>
-             </widget>
-            </item>
-            <item>
-             <spacer name="horizontalSpacer">
-              <property name="orientation">
-               <enum>Qt::Horizontal</enum>
-              </property>
-              <property name="sizeHint" stdset="0">
-               <size>
-                <width>40</width>
-                <height>20</height>
-               </size>
-              </property>
-             </spacer>
-            </item>
-            <item>
-             <widget class="QLabel" name="label_14">
-              <property name="text">
-               <string>Filter</string>
-              </property>
-             </widget>
-            </item>
-            <item>
-             <widget class="QLineEdit" name="languageFilter"/>
-            </item>
-           </layout>
-          </widget>
-         </item>
-         <item>
-          <widget class="QListView" name="languageView">
-           <property name="sizePolicy">
-            <sizepolicy hsizetype="MinimumExpanding" vsizetype="MinimumExpanding">
-             <horstretch>0</horstretch>
-             <verstretch>0</verstretch>
-            </sizepolicy>
-           </property>
-          </widget>
-         </item>
-         <item>
-          <spacer name="verticalSpacer_7">
-           <property name="orientation">
-            <enum>Qt::Vertical</enum>
-           </property>
-           <property name="sizeHint" stdset="0">
-            <size>
-             <width>20</width>
-             <height>0</height>
-            </size>
-           </property>
-          </spacer>
-         </item>
-        </layout>
-       </widget>
-       <widget class="QWidget" name="network_page">
-        <property name="sizePolicy">
-         <sizepolicy hsizetype="Preferred" vsizetype="MinimumExpanding">
-          <horstretch>0</horstretch>
-          <verstretch>0</verstretch>
-         </sizepolicy>
-        </property>
-        <layout class="QVBoxLayout" name="verticalLayout_15">
-         <property name="spacing">
-          <number>5</number>
-         </property>
-         <property name="margin">
-          <number>5</number>
-         </property>
-         <item>
-          <widget class="QGroupBox" name="groupBox_10">
-           <property name="title">
-            <string>Proxy</string>
-           </property>
-           <layout class="QGridLayout" name="gridLayout_2">
-            <item row="1" column="2">
-             <widget class="QLabel" name="label_23">
-              <property name="sizePolicy">
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-  <buttongroup name="buttonGroup_4"/>
-  <buttongroup name="defaultFileGroup"/>
-  <buttongroup name="buttonGroup_5"/>
-  <buttongroup name="buttonGroup_6"/>
-  <buttongroup name="buttonGroup_7"/>
-  <buttongroup name="buttonGroup"/>
- </buttongroups>
-</ui>
diff --git a/qt-gui.cpp b/subsurface-android-helper.cpp
index a4997a6fe..7b5d5df56 100644
--- a/qt-gui.cpp
+++ b/subsurface-android-helper.cpp
@@ -2,7 +2,7 @@
 /* Qt UI implementation */
 #include "dive.h"
 #include "display.h"
-#include "qt-ui/mainwindow.h"
+#include "desktop-widgets/mainwindow.h"
 #include "helpers.h"
 
 #include <QApplication>
@@ -10,10 +10,8 @@
 #include <QNetworkProxy>
 #include <QLibraryInfo>
 
-
 #include "qt-gui.h"
 
-#ifdef SUBSURFACE_MOBILE
 #include <QQuickWindow>
 #include <QQmlApplicationEngine>
 #include <QQmlContext>
@@ -21,25 +19,16 @@
 #include "qt-mobile/qmlmanager.h"
 #include "qt-models/divelistmodel.h"
 #include "qt-mobile/qmlprofile.h"
-QObject *qqWindowObject = NULL;
-#endif
 
-static MainWindow *window = NULL;
+QObject *qqWindowObject = NULL;
 
 void init_ui()
 {
 	init_qt_late();
-
-	window = new MainWindow();
-	if (existing_filename && existing_filename[0] != '\0')
-		window->setTitle(MWTF_FILENAME);
-	else
-		window->setTitle(MWTF_DEFAULT);
 }
 
 void run_ui()
 {
-#ifdef SUBSURFACE_MOBILE
 	window->hide();
 	qmlRegisterType<QMLManager>("org.subsurfacedivelog.mobile", 1, 0, "QMLManager");
 	qmlRegisterType<QMLProfile>("org.subsurfacedivelog.mobile", 1, 0, "QMLProfile");
@@ -66,15 +55,11 @@ void run_ui()
 	qml_window->setWidth(800);
 #endif
 	qml_window->show();
-#else
-	window->show();
-#endif
 	qApp->exec();
 }
 
 void exit_ui()
 {
-	delete window;
 	delete qApp;
 	free((void *)existing_filename);
 	free((void *)default_dive_computer_vendor);
@@ -87,5 +72,3 @@ double get_screen_dpi()
 	QDesktopWidget *mydesk = qApp->desktop();
 	return mydesk->physicalDpiX();
 }
-
-
diff --git a/subsurface-android-main.cpp b/subsurface-android-main.cpp
new file mode 100644
index 000000000..db974119e
--- /dev/null
+++ b/subsurface-android-main.cpp
@@ -0,0 +1,81 @@
+/* main.c */
+#include <locale.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <time.h>
+
+#include "dive.h"
+#include "qt-gui.h"
+#include "subsurfacestartup.h"
+#include "desktop-widgets/mainwindow.h"
+#include "desktop-widgets/diveplanner.h"
+#include "subsurface-core/color.h"
+#include "qthelper.h"
+
+#include <QStringList>
+#include <QApplication>
+#include <QLoggingCategory>
+#include <git2.h>
+
+QTranslator *qtTranslator, *ssrfTranslator;
+
+int main(int argc, char **argv)
+{
+	int i;
+	bool no_filenames = true;
+	QLoggingCategory::setFilterRules(QStringLiteral("qt.bluetooth* = true"));
+	QApplication *application = new QApplication(argc, argv);
+	QStringList files;
+	QStringList importedFiles;
+	QStringList arguments = QCoreApplication::arguments();
+
+	bool dedicated_console = arguments.length() > 1 &&
+				 (arguments.at(1) == QString("--win32console"));
+	subsurface_console_init(dedicated_console);
+
+	for (i = 1; i < arguments.length(); i++) {
+		QString a = arguments.at(i);
+		if (a.at(0) == '-') {
+			parse_argument(a.toLocal8Bit().data());
+			continue;
+		}
+		if (imported) {
+			importedFiles.push_back(a);
+		} else {
+			no_filenames = false;
+			files.push_back(a);
+		}
+	}
+#if !LIBGIT2_VER_MAJOR && LIBGIT2_VER_MINOR < 22
+	git_threads_init();
+#else
+	git_libgit2_init();
+#endif
+	setup_system_prefs();
+	prefs = default_prefs;
+	fill_profile_color();
+	parse_xml_init();
+	taglist_init_global();
+	init_ui();
+	if (no_filenames) {
+		if (prefs.default_file_behavior == LOCAL_DEFAULT_FILE) {
+			QString defaultFile(prefs.default_filename);
+			if (!defaultFile.isEmpty())
+				files.push_back(QString(prefs.default_filename));
+		} else if (prefs.default_file_behavior == CLOUD_DEFAULT_FILE) {
+			QString cloudURL;
+			if (getCloudURL(cloudURL) == 0)
+				files.push_back(cloudURL);
+		}
+	}
+
+	if (!quit)
+		run_ui();
+	exit_ui();
+	taglist_free(g_tag_list);
+	parse_xml_exit();
+	subsurface_console_exit();
+	free_prefs();
+	return 0;
+}
diff --git a/subsurface-core/CMakeLists.txt b/subsurface-core/CMakeLists.txt
new file mode 100644
index 000000000..e56f8bb34
--- /dev/null
+++ b/subsurface-core/CMakeLists.txt
@@ -0,0 +1,84 @@
+set(PLATFORM_SRC unknown_platform.c)
+if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
+	set(PLATFORM_SRC linux.c)
+elseif(ANDROID)
+	set(PLATFORM_SRC android.cpp)
+elseif(CMAKE_SYSTEM_NAME STREQUAL "Darwin")
+	set(PLATFORM_SRC macos.c)
+elseif(CMAKE_SYSTEM_NAME STREQUAL "Windows")
+	set(PLATFORM_SRC windows.c)
+endif()
+
+if(FTDISUPPORT)
+	set(SERIAL_FTDI serial_ftdi.c)
+endif()
+
+if(BTSUPPORT)
+	add_definitions(-DBT_SUPPORT)
+	set(BT_SRC_FILES qt-ui/btdeviceselectiondialog.cpp)
+	set(BT_CORE_SRC_FILES qtserialbluetooth.cpp)
+endif()
+
+# compile the core library, in C.
+set(SUBSURFACE_CORE_LIB_SRCS
+	cochran.c
+	datatrak.c
+	deco.c
+	device.c
+	dive.c
+	divesite.c
+	divesite.cpp
+	divelist.c
+	equipment.c
+	file.c
+	git-access.c
+	libdivecomputer.c
+	liquivision.c
+	load-git.c
+	membuffer.c
+	ostctools.c
+	parse-xml.c
+	planner.c
+	profile.c
+	gaspressures.c
+	worldmap-save.c
+	save-git.c
+	save-xml.c
+	save-html.c
+	sha1.c
+	statistics.c
+	strtod.c
+	subsurfacestartup.c
+	time.c
+	uemis.c
+	uemis-downloader.c
+	version.c
+	# gettextfrommoc should be added because we are using it on the c-code.
+	gettextfromc.cpp
+	# dirk ported some core functionality to c++.
+	qthelper.cpp
+	divecomputer.cpp
+	exif.cpp
+	subsurfacesysinfo.cpp
+	devicedetails.cpp
+	configuredivecomputer.cpp
+	configuredivecomputerthreads.cpp
+	divesitehelpers.cpp
+	taxonomy.c
+	checkcloudconnection.cpp
+	windowtitleupdate.cpp
+	divelogexportlogic.cpp
+	qt-init.cpp
+	qtserialbluetooth.cpp
+	metrics.cpp
+	color.cpp
+	pluginmanager.cpp
+	${SERIAL_FTDI}
+	${PLATFORM_SRC}
+	${BT_CORE_SRC_FILES}
+)
+source_group("Subsurface Core" FILES ${SUBSURFACE_CORE_LIB_SRCS})
+
+add_library(subsurface_corelib STATIC ${SUBSURFACE_CORE_LIB_SRCS} )
+target_link_libraries(subsurface_corelib ${QT_LIBRARIES})
+
diff --git a/android.cpp b/subsurface-core/android.cpp
index 3e14bec02..3e14bec02 100644
--- a/android.cpp
+++ b/subsurface-core/android.cpp
diff --git a/checkcloudconnection.cpp b/subsurface-core/checkcloudconnection.cpp
index be2a2fa18..be2a2fa18 100644
--- a/checkcloudconnection.cpp
+++ b/subsurface-core/checkcloudconnection.cpp
diff --git a/checkcloudconnection.h b/subsurface-core/checkcloudconnection.h
index 58a412797..58a412797 100644
--- a/checkcloudconnection.h
+++ b/subsurface-core/checkcloudconnection.h
diff --git a/cochran.c b/subsurface-core/cochran.c
index 267fe2b4a..267fe2b4a 100644
--- a/cochran.c
+++ b/subsurface-core/cochran.c
diff --git a/cochran.h b/subsurface-core/cochran.h
index 97d4361c8..97d4361c8 100644
--- a/cochran.h
+++ b/subsurface-core/cochran.h
diff --git a/qt-ui/graphicsview-common.cpp b/subsurface-core/color.cpp
index a1813ce2d..cf6f43916 100644
--- a/qt-ui/graphicsview-common.cpp
+++ b/subsurface-core/color.cpp
@@ -1,4 +1,4 @@
-#include "graphicsview-common.h"
+#include "color.h"
 
 QMap<color_indice_t, QVector<QColor> > profile_color;
 
diff --git a/color.h b/subsurface-core/color.h
index 7938e59a6..57ad77242 100644
--- a/color.h
+++ b/subsurface-core/color.h
@@ -5,6 +5,8 @@
    from http://chir.ag/projects/name-that-color */
 
 #include <QColor>
+#include <QMap>
+#include <QVector>
 
 // Greens
 #define CAMARONE1 QColor::fromRgbF(0.0, 0.4, 0.0, 1)
@@ -64,4 +66,87 @@
 // Magentas
 #define MEDIUMREDVIOLET1_HIGHER_TRANS QColor::fromRgbF(0.7, 0.2, 0.7, 0.1)
 
+#define SAC_COLORS_START_IDX SAC_1
+#define SAC_COLORS 9
+#define VELOCITY_COLORS_START_IDX VELO_STABLE
+#define VELOCITY_COLORS 5
+
+typedef enum {
+	/* SAC colors. Order is important, the SAC_COLORS_START_IDX define above. */
+	SAC_1,
+	SAC_2,
+	SAC_3,
+	SAC_4,
+	SAC_5,
+	SAC_6,
+	SAC_7,
+	SAC_8,
+	SAC_9,
+
+	/* Velocity colors.  Order is still important, ref VELOCITY_COLORS_START_IDX. */
+	VELO_STABLE,
+	VELO_SLOW,
+	VELO_MODERATE,
+	VELO_FAST,
+	VELO_CRAZY,
+
+	/* gas colors */
+	PO2,
+	PO2_ALERT,
+	PN2,
+	PN2_ALERT,
+	PHE,
+	PHE_ALERT,
+	O2SETPOINT,
+	CCRSENSOR1,
+	CCRSENSOR2,
+	CCRSENSOR3,
+	PP_LINES,
+
+	/* Other colors */
+	TEXT_BACKGROUND,
+	ALERT_BG,
+	ALERT_FG,
+	EVENTS,
+	SAMPLE_DEEP,
+	SAMPLE_SHALLOW,
+	SMOOTHED,
+	MINUTE,
+	TIME_GRID,
+	TIME_TEXT,
+	DEPTH_GRID,
+	MEAN_DEPTH,
+	HR_TEXT,
+	HR_PLOT,
+	HR_AXIS,
+	DEPTH_TOP,
+	DEPTH_BOTTOM,
+	TEMP_TEXT,
+	TEMP_PLOT,
+	SAC_DEFAULT,
+	BOUNDING_BOX,
+	PRESSURE_TEXT,
+	BACKGROUND,
+	BACKGROUND_TRANS,
+	CEILING_SHALLOW,
+	CEILING_DEEP,
+	CALC_CEILING_SHALLOW,
+	CALC_CEILING_DEEP,
+	TISSUE_PERCENTAGE,
+	GF_LINE,
+	AMB_PRESSURE_LINE
+} color_indice_t;
+
+extern QMap<color_indice_t, QVector<QColor> > profile_color;
+void fill_profile_color();
+QColor getColor(const color_indice_t i, bool isGrayscale = false);
+QColor getSacColor(int sac, int diveSac);
+struct text_render_options {
+	double size;
+	color_indice_t color;
+	double hpos, vpos;
+};
+
+typedef text_render_options text_render_options_t;
+
 #endif // COLOR_H
diff --git a/configuredivecomputer.cpp b/subsurface-core/configuredivecomputer.cpp
index 2457ffe82..2457ffe82 100644
--- a/configuredivecomputer.cpp
+++ b/subsurface-core/configuredivecomputer.cpp
diff --git a/configuredivecomputer.h b/subsurface-core/configuredivecomputer.h
index f14eeeca3..f14eeeca3 100644
--- a/configuredivecomputer.h
+++ b/subsurface-core/configuredivecomputer.h
diff --git a/configuredivecomputerthreads.cpp b/subsurface-core/configuredivecomputerthreads.cpp
index 78edcb37c..78edcb37c 100644
--- a/configuredivecomputerthreads.cpp
+++ b/subsurface-core/configuredivecomputerthreads.cpp
diff --git a/configuredivecomputerthreads.h b/subsurface-core/configuredivecomputerthreads.h
index 1d7a36f9b..1d7a36f9b 100644
--- a/configuredivecomputerthreads.h
+++ b/subsurface-core/configuredivecomputerthreads.h
diff --git a/datatrak.c b/subsurface-core/datatrak.c
index 03fa71a50..03fa71a50 100644
--- a/datatrak.c
+++ b/subsurface-core/datatrak.c
diff --git a/datatrak.h b/subsurface-core/datatrak.h
index 3a37e0465..3a37e0465 100644
--- a/datatrak.h
+++ b/subsurface-core/datatrak.h
diff --git a/deco.c b/subsurface-core/deco.c
index 506d8b58f..506d8b58f 100644
--- a/deco.c
+++ b/subsurface-core/deco.c
diff --git a/deco.h b/subsurface-core/deco.h
index 08ff93422..08ff93422 100644
--- a/deco.h
+++ b/subsurface-core/deco.h
diff --git a/device.c b/subsurface-core/device.c
index c952c84be..c952c84be 100644
--- a/device.c
+++ b/subsurface-core/device.c
diff --git a/device.h b/subsurface-core/device.h
index 9ff2ce23a..9ff2ce23a 100644
--- a/device.h
+++ b/subsurface-core/device.h
diff --git a/devicedetails.cpp b/subsurface-core/devicedetails.cpp
index 1ac56375d..1ac56375d 100644
--- a/devicedetails.cpp
+++ b/subsurface-core/devicedetails.cpp
diff --git a/devicedetails.h b/subsurface-core/devicedetails.h
index 1ed9914ef..1ed9914ef 100644
--- a/devicedetails.h
+++ b/subsurface-core/devicedetails.h
diff --git a/display.h b/subsurface-core/display.h
index 9e3e1d159..9e3e1d159 100644
--- a/display.h
+++ b/subsurface-core/display.h
diff --git a/dive.c b/subsurface-core/dive.c
index 2ae84ca1e..2ae84ca1e 100644
--- a/dive.c
+++ b/subsurface-core/dive.c
diff --git a/dive.h b/subsurface-core/dive.h
index cef1106fd..cef1106fd 100644
--- a/dive.h
+++ b/subsurface-core/dive.h
diff --git a/divecomputer.cpp b/subsurface-core/divecomputer.cpp
index e4081e1cd..e4081e1cd 100644
--- a/divecomputer.cpp
+++ b/subsurface-core/divecomputer.cpp
diff --git a/divecomputer.h b/subsurface-core/divecomputer.h
index 98d12ab8b..98d12ab8b 100644
--- a/divecomputer.h
+++ b/subsurface-core/divecomputer.h
diff --git a/divelist.c b/subsurface-core/divelist.c
index a14fabf88..a14fabf88 100644
--- a/divelist.c
+++ b/subsurface-core/divelist.c
diff --git a/divelist.h b/subsurface-core/divelist.h
index 5bae09cff..5bae09cff 100644
--- a/divelist.h
+++ b/subsurface-core/divelist.h
diff --git a/divelogexportlogic.cpp b/subsurface-core/divelogexportlogic.cpp
index af5157f4a..af5157f4a 100644
--- a/divelogexportlogic.cpp
+++ b/subsurface-core/divelogexportlogic.cpp
diff --git a/divelogexportlogic.h b/subsurface-core/divelogexportlogic.h
index 84f09c362..84f09c362 100644
--- a/divelogexportlogic.h
+++ b/subsurface-core/divelogexportlogic.h
diff --git a/divesite.c b/subsurface-core/divesite.c
index e9eed2a07..e9eed2a07 100644
--- a/divesite.c
+++ b/subsurface-core/divesite.c
diff --git a/divesite.cpp b/subsurface-core/divesite.cpp
index ae102a14b..ae102a14b 100644
--- a/divesite.cpp
+++ b/subsurface-core/divesite.cpp
diff --git a/divesite.h b/subsurface-core/divesite.h
index f18b2e8e8..f18b2e8e8 100644
--- a/divesite.h
+++ b/subsurface-core/divesite.h
diff --git a/divesitehelpers.cpp b/subsurface-core/divesitehelpers.cpp
index 3542f96fa..3542f96fa 100644
--- a/divesitehelpers.cpp
+++ b/subsurface-core/divesitehelpers.cpp
diff --git a/divesitehelpers.h b/subsurface-core/divesitehelpers.h
index a08069bc0..a08069bc0 100644
--- a/divesitehelpers.h
+++ b/subsurface-core/divesitehelpers.h
diff --git a/equipment.c b/subsurface-core/equipment.c
index 47c439735..47c439735 100644
--- a/equipment.c
+++ b/subsurface-core/equipment.c
diff --git a/exif.cpp b/subsurface-core/exif.cpp
index 0b1cda2bc..0b1cda2bc 100644
--- a/exif.cpp
+++ b/subsurface-core/exif.cpp
diff --git a/exif.h b/subsurface-core/exif.h
index 0fb3a7d4a..0fb3a7d4a 100644
--- a/exif.h
+++ b/subsurface-core/exif.h
diff --git a/file.c b/subsurface-core/file.c
index 0263da457..0263da457 100644
--- a/file.c
+++ b/subsurface-core/file.c
diff --git a/file.h b/subsurface-core/file.h
index 855109960..855109960 100644
--- a/file.h
+++ b/subsurface-core/file.h
diff --git a/gaspressures.c b/subsurface-core/gaspressures.c
index 5f46d6080..5f46d6080 100644
--- a/gaspressures.c
+++ b/subsurface-core/gaspressures.c
diff --git a/gaspressures.h b/subsurface-core/gaspressures.h
index 420c117a2..420c117a2 100644
--- a/gaspressures.h
+++ b/subsurface-core/gaspressures.h
diff --git a/gettext.h b/subsurface-core/gettext.h
index 43ff023c7..43ff023c7 100644
--- a/gettext.h
+++ b/subsurface-core/gettext.h
diff --git a/gettextfromc.cpp b/subsurface-core/gettextfromc.cpp
index c579e3c3c..c579e3c3c 100644
--- a/gettextfromc.cpp
+++ b/subsurface-core/gettextfromc.cpp
diff --git a/gettextfromc.h b/subsurface-core/gettextfromc.h
index 53df18365..53df18365 100644
--- a/gettextfromc.h
+++ b/subsurface-core/gettextfromc.h
diff --git a/git-access.c b/subsurface-core/git-access.c
index 607789f98..607789f98 100644
--- a/git-access.c
+++ b/subsurface-core/git-access.c
diff --git a/git-access.h b/subsurface-core/git-access.h
index a2a9ba3ae..a2a9ba3ae 100644
--- a/git-access.h
+++ b/subsurface-core/git-access.h
diff --git a/helpers.h b/subsurface-core/helpers.h
index 5f2f2f2c5..b5c119870 100644
--- a/helpers.h
+++ b/subsurface-core/helpers.h
@@ -40,7 +40,6 @@ bool is_same_day (timestamp_t trip_when, timestamp_t dive_when);
 QString get_trip_date_string(timestamp_t when, int nr, bool getday);
 QString uiLanguage(QLocale *callerLoc);
 QLocale getLocale();
-QString getDateFormat();
 void selectedDivesGasUsed(QVector<QPair<QString, int> > &gasUsed);
 QString getUserAgent();
 
diff --git a/subsurface-core/isocialnetworkintegration.h b/subsurface-core/isocialnetworkintegration.h
new file mode 100644
index 000000000..778a171b3
--- /dev/null
+++ b/subsurface-core/isocialnetworkintegration.h
@@ -0,0 +1,72 @@
+#ifndef ISOCIALNETWORKINTEGRATION_H
+#define ISOCIALNETWORKINTEGRATION_H
+
+#include <QtPlugin>
+
+/* This Interface represents a Plugin for Social Network integration,
+ * with it you may be able to create plugins for facebook, instagram,
+ * twitpic, google plus and any other thing you may imagine.
+ *
+ * We bundle facebook integration as an example.
+ */
+
+class ISocialNetworkIntegration {
+public:
+	/*!
+	 * @name socialNetworkName
+	 * @brief The name of this social network
+	 * @return The name of this social network
+	 *
+	 * The name of this social network will be used to populate the Menu to toggle states
+	 * between connected/disconnected, and also submit stuff to it.
+	 */
+	virtual QString socialNetworkName() const = 0;
+
+	/*!
+	 * @name socialNetworkIcon
+	 * @brief The icon of this social network
+	 * @return The icon of this social network
+	 *
+	 * The icon of this social network will be used to populate the menu, and can also be
+	 * used on a toolbar if requested.
+	 */
+	virtual QString socialNetworkIcon() const = 0;
+
+	/*!
+	 * @name isConnected
+	 * @brief returns true if connected to this social network, false otherwise
+	 * @return true if connected to this social network, false otherwise
+	 */
+	virtual bool isConnected() = 0;
+
+	/*!
+	 * @name requestLogin
+	 * @brief try to login on this social network.
+	 *
+	 * Try to login on this social network. All widget implementation that
+	 * manages login should be done inside this function.
+	 */
+	virtual void requestLogin() = 0;
+
+	/*!
+	 * @name requestLogoff
+	 * @brief tries to logoff from this social network
+	 *
+	 * Try to logoff from this social network.
+	 */
+	virtual void requestLogoff() = 0;
+
+	/*!
+	 * @name uploadCurrentDive
+	 * @brief send the current dive info to the Social Network
+	 *
+	 * Should format all the options and pixmaps from the current dive
+	 * to update to the social network. All widget stuff related to sendint
+	 * dive information should be executed inside this function.
+	 */
+	virtual void uploadCurrentDive() = 0;
+};
+
+Q_DECLARE_INTERFACE(ISocialNetworkIntegration, "org.subsurface.ISocialNetworkIntegration.v1")
+Q_DECLARE_METATYPE(ISocialNetworkIntegration*);
+#endif
\ No newline at end of file
diff --git a/libdivecomputer.c b/subsurface-core/libdivecomputer.c
index ca8378379..ca8378379 100644
--- a/libdivecomputer.c
+++ b/subsurface-core/libdivecomputer.c
diff --git a/libdivecomputer.h b/subsurface-core/libdivecomputer.h
index 79817e509..79817e509 100644
--- a/libdivecomputer.h
+++ b/subsurface-core/libdivecomputer.h
diff --git a/linux.c b/subsurface-core/linux.c
index d4131c7ea..d4131c7ea 100644
--- a/linux.c
+++ b/subsurface-core/linux.c
diff --git a/liquivision.c b/subsurface-core/liquivision.c
index 295287c15..295287c15 100644
--- a/liquivision.c
+++ b/subsurface-core/liquivision.c
diff --git a/load-git.c b/subsurface-core/load-git.c
index 39dab4367..39dab4367 100644
--- a/load-git.c
+++ b/subsurface-core/load-git.c
diff --git a/macos.c b/subsurface-core/macos.c
index aa2be4b3b..aa2be4b3b 100644
--- a/macos.c
+++ b/subsurface-core/macos.c
diff --git a/membuffer.c b/subsurface-core/membuffer.c
index 2889a0cdc..2889a0cdc 100644
--- a/membuffer.c
+++ b/subsurface-core/membuffer.c
diff --git a/membuffer.h b/subsurface-core/membuffer.h
index 434b34c71..434b34c71 100644
--- a/membuffer.h
+++ b/subsurface-core/membuffer.h
diff --git a/qt-ui/metrics.cpp b/subsurface-core/metrics.cpp
index 203c2e5e2..203c2e5e2 100644
--- a/qt-ui/metrics.cpp
+++ b/subsurface-core/metrics.cpp
diff --git a/qt-ui/metrics.h b/subsurface-core/metrics.h
index 30295a3d8..30295a3d8 100644
--- a/qt-ui/metrics.h
+++ b/subsurface-core/metrics.h
diff --git a/ostctools.c b/subsurface-core/ostctools.c
index 4b4cff241..4b4cff241 100644
--- a/ostctools.c
+++ b/subsurface-core/ostctools.c
diff --git a/parse-xml.c b/subsurface-core/parse-xml.c
index 93ce74305..93ce74305 100644
--- a/parse-xml.c
+++ b/subsurface-core/parse-xml.c
diff --git a/planner.c b/subsurface-core/planner.c
index 22d37165a..22d37165a 100644
--- a/planner.c
+++ b/subsurface-core/planner.c
diff --git a/planner.h b/subsurface-core/planner.h
index a675989e0..a675989e0 100644
--- a/planner.h
+++ b/subsurface-core/planner.h
diff --git a/subsurface-core/pluginmanager.cpp b/subsurface-core/pluginmanager.cpp
new file mode 100644
index 000000000..5c0f22525
--- /dev/null
+++ b/subsurface-core/pluginmanager.cpp
@@ -0,0 +1,51 @@
+#include "pluginmanager.h"
+
+#include <QApplication>
+#include <QDir>
+#include <QPluginLoader>
+#include <QDebug>
+
+static QList<ISocialNetworkIntegration*> _socialNetworks;
+
+PluginManager& PluginManager::instance()
+{
+	static PluginManager self;
+	return self;
+}
+
+PluginManager::PluginManager()
+{
+}
+
+void PluginManager::loadPlugins()
+{
+	QDir pluginsDir(qApp->applicationDirPath());
+
+#if defined(Q_OS_WIN)
+	if (pluginsDir.dirName().toLower() == "debug" || pluginsDir.dirName().toLower() == "release")
+		pluginsDir.cdUp();
+#elif defined(Q_OS_MAC)
+	if (pluginsDir.dirName() == "MacOS") {
+		pluginsDir.cdUp();
+		pluginsDir.cdUp();
+		pluginsDir.cdUp();
+	}
+#endif
+	pluginsDir.cd("plugins");
+
+	qDebug() << "Plugins Directory: " << pluginsDir;
+	foreach (const QString& fileName, pluginsDir.entryList(QDir::Files)) {
+		QPluginLoader loader(pluginsDir.absoluteFilePath(fileName));
+		QObject *plugin = loader.instance();
+		if(!plugin)
+			continue;
+
+		if (ISocialNetworkIntegration *social = qobject_cast<ISocialNetworkIntegration*>(plugin))
+			_socialNetworks.push_back(social);
+	}
+}
+
+QList<ISocialNetworkIntegration*> PluginManager::socialNetworkIntegrationPlugins() const
+{
+	return _socialNetworks;
+}
diff --git a/subsurface-core/pluginmanager.h b/subsurface-core/pluginmanager.h
new file mode 100644
index 000000000..c4943895c
--- /dev/null
+++ b/subsurface-core/pluginmanager.h
@@ -0,0 +1,19 @@
+#ifndef PLUGINMANAGER_H
+#define PLUGINMANAGER_H
+
+#include <QObject>
+
+#include "isocialnetworkintegration.h"
+
+class PluginManager {
+public:
+	static PluginManager& instance();
+	void loadPlugins();
+	QList<ISocialNetworkIntegration*> socialNetworkIntegrationPlugins() const;
+private:
+	PluginManager();
+	PluginManager(const PluginManager&) = delete;
+	PluginManager& operator=(const PluginManager&) = delete;
+};
+
+#endif
\ No newline at end of file
diff --git a/pref.h b/subsurface-core/pref.h
index 84975aaaa..9f5f587e2 100644
--- a/pref.h
+++ b/subsurface-core/pref.h
@@ -44,6 +44,11 @@ struct preferences {
 	const char *default_cylinder;
 	const char *cloud_base_url;
 	const char *cloud_git_url;
+	const char *time_format;
+	const char *date_format;
+	const char *date_format_short;
+	bool time_format_override;
+	bool date_format_override;
 	double font_size;
 	partial_pressure_graphs_t pp_graphs;
 	short mod;
diff --git a/prefs-macros.h b/subsurface-core/prefs-macros.h
index fe459d3da..fe459d3da 100644
--- a/prefs-macros.h
+++ b/subsurface-core/prefs-macros.h
diff --git a/profile.c b/subsurface-core/profile.c
index edba51ebd..edba51ebd 100644
--- a/profile.c
+++ b/subsurface-core/profile.c
diff --git a/profile.h b/subsurface-core/profile.h
index a6dbfcf5f..a6dbfcf5f 100644
--- a/profile.h
+++ b/subsurface-core/profile.h
diff --git a/qt-gui.h b/subsurface-core/qt-gui.h
index ca038b145..ca038b145 100644
--- a/qt-gui.h
+++ b/subsurface-core/qt-gui.h
diff --git a/qt-init.cpp b/subsurface-core/qt-init.cpp
index b52dfd970..b52dfd970 100644
--- a/qt-init.cpp
+++ b/subsurface-core/qt-init.cpp
diff --git a/qthelper.cpp b/subsurface-core/qthelper.cpp
index a12d25333..40c507a7e 100644
--- a/qthelper.cpp
+++ b/subsurface-core/qthelper.cpp
@@ -33,9 +33,6 @@
 #include <libxslt/documents.h>
 
 const char *existing_filename;
-static QString shortDateFormat;
-static QString dateFormat;
-static QString timeFormat;
 static QLocale loc;
 
 #define translate(_context, arg) trGettext(arg)
@@ -168,8 +165,8 @@ void Dive::put_date_time()
 {
 	QDateTime localTime = QDateTime::fromTime_t(dive->when - gettimezoneoffset(displayed_dive.when));
 	localTime.setTimeSpec(Qt::UTC);
-	m_date = localTime.date().toString(dateFormat);
-	m_time = localTime.time().toString(timeFormat);
+	m_date = localTime.date().toString(prefs.date_format);
+	m_time = localTime.time().toString(prefs.time_format);
 }
 
 void Dive::put_timestamp()
@@ -721,7 +718,11 @@ QString getUserAgent()
 
 QString uiLanguage(QLocale *callerLoc)
 {
+	QString shortDateFormat;
+	QString dateFormat;
+	QString timeFormat;
 	QSettings s;
+	QVariant v;
 	s.beginGroup("Language");
 
 	if (!s.value("UseSystemLanguage", true).toBool()) {
@@ -731,6 +732,11 @@ QString uiLanguage(QLocale *callerLoc)
 	}
 
 	QString uiLang = loc.uiLanguages().first();
+	GET_BOOL("time_format_override", time_format_override);
+	GET_BOOL("date_format_override", date_format_override);
+	GET_TXT("time_format", time_format);
+	GET_TXT("date_format", date_format);
+	GET_TXT("date_format_short", date_format_short);
 	s.endGroup();
 
 	// there's a stupid Qt bug on MacOS where uiLanguages doesn't give us the country info
@@ -742,18 +748,33 @@ QString uiLanguage(QLocale *callerLoc)
 	if (callerLoc)
 		*callerLoc = loc;
 
-	// the short format is fine
-	// the long format uses long weekday and month names, so replace those with the short ones
-	// for time we don't want the time zone designator and don't want leading zeroes on the hours
-	shortDateFormat = loc.dateFormat(QLocale::ShortFormat);
-	dateFormat = loc.dateFormat(QLocale::LongFormat);
-	dateFormat.replace("dddd,", "ddd").replace("dddd", "ddd").replace("MMMM", "MMM");
-	// special hack for Swedish as our switching from long weekday names to short weekday names
-	// messes things up there
-	dateFormat.replace("'en' 'den' d:'e'", " d");
-	timeFormat = loc.timeFormat();
-	timeFormat.replace("(t)", "").replace(" t", "").replace("t", "").replace("hh", "h").replace("HH", "H").replace("'kl'.", "");
-	timeFormat.replace(".ss", "").replace(":ss", "").replace("ss", "");
+	if (!prefs.date_format_override || same_string(prefs.date_format_short, "") || same_string(prefs.date_format, "")) {
+		// derive our standard date format from what the locale gives us
+		// the short format is fine
+		// the long format uses long weekday and month names, so replace those with the short ones
+		// for time we don't want the time zone designator and don't want leading zeroes on the hours
+		shortDateFormat = loc.dateFormat(QLocale::ShortFormat);
+		dateFormat = loc.dateFormat(QLocale::LongFormat);
+		dateFormat.replace("dddd,", "ddd").replace("dddd", "ddd").replace("MMMM", "MMM");
+		// special hack for Swedish as our switching from long weekday names to short weekday names
+		// messes things up there
+		dateFormat.replace("'en' 'den' d:'e'", " d");
+		if (!prefs.date_format_override || same_string(prefs.date_format, "")) {
+			free((void*)prefs.date_format);
+			prefs.date_format = strdup(qPrintable(dateFormat));
+		}
+		if (!prefs.date_format_override || same_string(prefs.date_format_short, "")) {
+			free((void*)prefs.date_format_short);
+			prefs.date_format_short = strdup(qPrintable(shortDateFormat));
+		}
+	}
+	if (!prefs.time_format_override || same_string(prefs.time_format, "")) {
+		timeFormat = loc.timeFormat();
+		timeFormat.replace("(t)", "").replace(" t", "").replace("t", "").replace("hh", "h").replace("HH", "H").replace("'kl'.", "");
+		timeFormat.replace(".ss", "").replace(":ss", "").replace("ss", "");
+		free((void*)prefs.time_format);
+		prefs.time_format = strdup(qPrintable(timeFormat));
+	}
 	return uiLang;
 }
 
@@ -762,10 +783,6 @@ QLocale getLocale()
 	return loc;
 }
 
-QString getDateFormat()
-{
-	return dateFormat;
-}
 void set_filename(const char *filename, bool force)
 {
 	if (!force && existing_filename)
@@ -1034,14 +1051,14 @@ QString get_dive_date_string(timestamp_t when)
 {
 	QDateTime ts;
 	ts.setMSecsSinceEpoch(when * 1000L);
-	return loc.toString(ts.toUTC(), dateFormat + " " + timeFormat);
+	return loc.toString(ts.toUTC(), QString(prefs.date_format) + " " + prefs.time_format);
 }
 
 QString get_short_dive_date_string(timestamp_t when)
 {
 	QDateTime ts;
 	ts.setMSecsSinceEpoch(when * 1000L);
-	return loc.toString(ts.toUTC(), shortDateFormat + " " + timeFormat);
+	return loc.toString(ts.toUTC(), QString(prefs.date_format_short) + " " + prefs.time_format);
 }
 
 const char *get_dive_date_c_string(timestamp_t when)
@@ -1076,7 +1093,7 @@ QString get_trip_date_string(timestamp_t when, int nr, bool getday)
 
 	QString suffix = " " + QObject::tr("(%n dive(s))", "", nr);
 	if (getday) {
-		ret = localTime.date().toString(dateFormat) + suffix;
+		ret = localTime.date().toString(prefs.date_format) + suffix;
 	} else {
 		ret = localTime.date().toString("MMM yy") + suffix;
 	}
diff --git a/qthelper.h b/subsurface-core/qthelper.h
index a2b7b6c39..a2b7b6c39 100644
--- a/qthelper.h
+++ b/subsurface-core/qthelper.h
diff --git a/qthelperfromc.h b/subsurface-core/qthelperfromc.h
index d2e80144c..d2e80144c 100644
--- a/qthelperfromc.h
+++ b/subsurface-core/qthelperfromc.h
diff --git a/qtserialbluetooth.cpp b/subsurface-core/qtserialbluetooth.cpp
index 025ab8c34..025ab8c34 100644
--- a/qtserialbluetooth.cpp
+++ b/subsurface-core/qtserialbluetooth.cpp
diff --git a/save-git.c b/subsurface-core/save-git.c
index 69ad0726d..69ad0726d 100644
--- a/save-git.c
+++ b/subsurface-core/save-git.c
diff --git a/save-html.c b/subsurface-core/save-html.c
index 64ce94f66..64ce94f66 100644
--- a/save-html.c
+++ b/subsurface-core/save-html.c
diff --git a/save-html.h b/subsurface-core/save-html.h
index 20743e90a..20743e90a 100644
--- a/save-html.h
+++ b/subsurface-core/save-html.h
diff --git a/save-xml.c b/subsurface-core/save-xml.c
index 166885861..166885861 100644
--- a/save-xml.c
+++ b/subsurface-core/save-xml.c
diff --git a/serial_ftdi.c b/subsurface-core/serial_ftdi.c
index cbac026cf..cbac026cf 100644
--- a/serial_ftdi.c
+++ b/subsurface-core/serial_ftdi.c
diff --git a/sha1.c b/subsurface-core/sha1.c
index acf8c5d9f..acf8c5d9f 100644
--- a/sha1.c
+++ b/subsurface-core/sha1.c
diff --git a/sha1.h b/subsurface-core/sha1.h
index cab6ff77d..cab6ff77d 100644
--- a/sha1.h
+++ b/subsurface-core/sha1.h
diff --git a/statistics.c b/subsurface-core/statistics.c
index 19fd350eb..19fd350eb 100644
--- a/statistics.c
+++ b/subsurface-core/statistics.c
diff --git a/statistics.h b/subsurface-core/statistics.h
index dbab25761..dbab25761 100644
--- a/statistics.h
+++ b/subsurface-core/statistics.h
diff --git a/strndup.h b/subsurface-core/strndup.h
index 84e18b60f..84e18b60f 100644
--- a/strndup.h
+++ b/subsurface-core/strndup.h
diff --git a/strtod.c b/subsurface-core/strtod.c
index 81e5d42d1..81e5d42d1 100644
--- a/strtod.c
+++ b/subsurface-core/strtod.c
diff --git a/subsurfacestartup.c b/subsurface-core/subsurfacestartup.c
index 1286885ee..0bde2a070 100644
--- a/subsurfacestartup.c
+++ b/subsurface-core/subsurfacestartup.c
@@ -291,6 +291,9 @@ void copy_prefs(struct preferences *src, struct preferences *dest)
 	dest->proxy_host = copy_string(src->proxy_host);
 	dest->proxy_user = copy_string(src->proxy_user);
 	dest->proxy_pass = copy_string(src->proxy_pass);
+	dest->time_format = copy_string(src->time_format);
+	dest->date_format = copy_string(src->date_format);
+	dest->date_format_short = copy_string(src->date_format_short);
 	dest->cloud_storage_password = copy_string(src->cloud_storage_password);
 	dest->cloud_storage_newpassword = copy_string(src->cloud_storage_newpassword);
 	dest->cloud_storage_email = copy_string(src->cloud_storage_email);
diff --git a/subsurfacestartup.h b/subsurface-core/subsurfacestartup.h
index 3ccc24aa4..3ccc24aa4 100644
--- a/subsurfacestartup.h
+++ b/subsurface-core/subsurfacestartup.h
diff --git a/subsurfacesysinfo.cpp b/subsurface-core/subsurfacesysinfo.cpp
index a7173b169..a7173b169 100644
--- a/subsurfacesysinfo.cpp
+++ b/subsurface-core/subsurfacesysinfo.cpp
diff --git a/subsurfacesysinfo.h b/subsurface-core/subsurfacesysinfo.h
index b2c267b83..b2c267b83 100644
--- a/subsurfacesysinfo.h
+++ b/subsurface-core/subsurfacesysinfo.h
diff --git a/taxonomy.c b/subsurface-core/taxonomy.c
index 670d85ad0..670d85ad0 100644
--- a/taxonomy.c
+++ b/subsurface-core/taxonomy.c
diff --git a/taxonomy.h b/subsurface-core/taxonomy.h
index 51245d562..51245d562 100644
--- a/taxonomy.h
+++ b/subsurface-core/taxonomy.h
diff --git a/time.c b/subsurface-core/time.c
index b658954bc..b658954bc 100644
--- a/time.c
+++ b/subsurface-core/time.c
diff --git a/uemis-downloader.c b/subsurface-core/uemis-downloader.c
index 2a6e5178c..2a6e5178c 100644
--- a/uemis-downloader.c
+++ b/subsurface-core/uemis-downloader.c
diff --git a/uemis.c b/subsurface-core/uemis.c
index 4135e0cfe..4135e0cfe 100644
--- a/uemis.c
+++ b/subsurface-core/uemis.c
diff --git a/uemis.h b/subsurface-core/uemis.h
index 5f32fe76c..5f32fe76c 100644
--- a/uemis.h
+++ b/subsurface-core/uemis.h
diff --git a/units.h b/subsurface-core/units.h
index 1273bd9bb..1273bd9bb 100644
--- a/units.h
+++ b/subsurface-core/units.h
diff --git a/version.c b/subsurface-core/version.c
index 5b54bf4c7..5b54bf4c7 100644
--- a/version.c
+++ b/subsurface-core/version.c
diff --git a/version.h b/subsurface-core/version.h
index bc0aac00d..bc0aac00d 100644
--- a/version.h
+++ b/subsurface-core/version.h
diff --git a/webservice.h b/subsurface-core/webservice.h
index 052b8aae7..052b8aae7 100644
--- a/webservice.h
+++ b/subsurface-core/webservice.h
diff --git a/windows.c b/subsurface-core/windows.c
index a2386fd83..a2386fd83 100644
--- a/windows.c
+++ b/subsurface-core/windows.c
diff --git a/windowtitleupdate.cpp b/subsurface-core/windowtitleupdate.cpp
index eec324c68..eec324c68 100644
--- a/windowtitleupdate.cpp
+++ b/subsurface-core/windowtitleupdate.cpp
diff --git a/windowtitleupdate.h b/subsurface-core/windowtitleupdate.h
index 8650e5868..8650e5868 100644
--- a/windowtitleupdate.h
+++ b/subsurface-core/windowtitleupdate.h
diff --git a/worldmap-options.h b/subsurface-core/worldmap-options.h
index 177443563..177443563 100644
--- a/worldmap-options.h
+++ b/subsurface-core/worldmap-options.h
diff --git a/worldmap-save.c b/subsurface-core/worldmap-save.c
index 25c5ee33f..25c5ee33f 100644
--- a/worldmap-save.c
+++ b/subsurface-core/worldmap-save.c
diff --git a/worldmap-save.h b/subsurface-core/worldmap-save.h
index 102ea40e5..102ea40e5 100644
--- a/worldmap-save.h
+++ b/subsurface-core/worldmap-save.h
diff --git a/subsurface-desktop-helper.cpp b/subsurface-desktop-helper.cpp
new file mode 100644
index 000000000..420f75249
--- /dev/null
+++ b/subsurface-desktop-helper.cpp
@@ -0,0 +1,65 @@
+/* qt-gui.cpp */
+/* Qt UI implementation */
+#include "dive.h"
+#include "display.h"
+#include "desktop-widgets/mainwindow.h"
+#include "helpers.h"
+#include "pluginmanager.h"
+
+#include <QApplication>
+#include <QDesktopWidget>
+#include <QNetworkProxy>
+#include <QLibraryInfo>
+
+
+#include "qt-gui.h"
+
+#ifdef SUBSURFACE_MOBILE
+#include <QQuickWindow>
+#include <QQmlApplicationEngine>
+#include <QQmlContext>
+#include <QSortFilterProxyModel>
+#include "qt-mobile/qmlmanager.h"
+#include "qt-models/divelistmodel.h"
+#include "qt-mobile/qmlprofile.h"
+QObject *qqWindowObject = NULL;
+#endif
+
+static MainWindow *window = NULL;
+
+void init_ui()
+{
+	init_qt_late();
+
+	PluginManager::instance().loadPlugins();
+
+	window = new MainWindow();
+	if (existing_filename && existing_filename[0] != '\0')
+		window->setTitle(MWTF_FILENAME);
+	else
+		window->setTitle(MWTF_DEFAULT);
+}
+
+void run_ui()
+{
+	window->show();
+	qApp->exec();
+}
+
+void exit_ui()
+{
+	delete window;
+	delete qApp;
+	free((void *)existing_filename);
+	free((void *)default_dive_computer_vendor);
+	free((void *)default_dive_computer_product);
+	free((void *)default_dive_computer_device);
+}
+
+double get_screen_dpi()
+{
+	QDesktopWidget *mydesk = qApp->desktop();
+	return mydesk->physicalDpiX();
+}
+
+
diff --git a/main.cpp b/subsurface-desktop-main.cpp
index 171876abf..e7259c3f3 100644
--- a/main.cpp
+++ b/subsurface-desktop-main.cpp
@@ -8,9 +8,9 @@
 #include "dive.h"
 #include "qt-gui.h"
 #include "subsurfacestartup.h"
-#include "qt-ui/mainwindow.h"
-#include "qt-ui/diveplanner.h"
-#include "qt-ui/graphicsview-common.h"
+#include "desktop-widgets/mainwindow.h"
+#include "desktop-widgets/diveplanner.h"
+#include "subsurface-core/color.h"
 #include "qthelper.h"
 
 #include <QStringList>
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
new file mode 100644
index 000000000..23642fb3c
--- /dev/null
+++ b/tests/CMakeLists.txt
@@ -0,0 +1,28 @@
+# QTest based tests
+macro(TEST NAME FILE)
+	add_executable(${NAME} ${FILE} )
+	target_link_libraries(${NAME} subsurface_corelib ${QT_TEST_LIBRARIES} ${SUBSURFACE_LINK_LIBRARIES})
+	add_test(NAME ${NAME} COMMAND  $<TARGET_FILE:${NAME}>)
+endmacro()
+
+enable_testing()
+add_definitions(-g)
+TEST(TestUnitConversion testunitconversion.cpp)
+TEST(TestProfile testprofile.cpp)
+TEST(TestGpsCoords testgpscoords.cpp)
+TEST(TestParse testparse.cpp)
+TEST(TestPlan testplan.cpp)
+TEST(TestDiveSiteDuplication testdivesiteduplication.cpp)
+TEST(TestRenumber testrenumber.cpp)
+TEST(TestGitStorage testgitstorage.cpp)
+
+add_custom_target(check COMMAND ${CMAKE_CTEST_COMMAND}
+	DEPENDS
+	TestUnitConversion
+	TestProfile
+	TestGpsCoords
+	TestParse
+	TestGitStorage
+	TestPlan
+	TestDiveSiteDuplication
+)
\ No newline at end of file