Creating a Notification widget in the Main Window.

The main error message bar can be used to show exporting information and
other notification.

So a new Notification handler object is created in the main window
<NotificationWidget> that inherits <KMessageWidget> that shows different
type of notifications, ex. (Warning, Error and information)

Also this class contains a QFutureWatcher object that is set to handle
the QFuture variable returned from the exporting thread. this will allow
the UI to be updated when the thread finishes execution.

Signed-off-by: Gehad elrobey <gehadelrobey@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

7 files changed, 88 insertions, 12 deletions

diff --git a/qt-ui/divelogexportdialog.cpp b/qt-ui/divelogexportdialog.cpp
index 43c41550f..ff8317062 100644
--- a/qt-ui/divelogexportdialog.cpp
+++ b/qt-ui/divelogexportdialog.cpp
@@ -9,6 +9,7 @@
 #include "subsurfacewebservices.h"
 #include "worldmap-save.h"
 #include "save-html.h"
+#include "mainwindow.h"
 
 #define GET_UNIT(name, field, f, t)                   \
 	v = settings.value(QString(name));            \
@@ -312,8 +313,11 @@ void DiveLogExportDialog::on_buttonBox_accepted()
 		settings.setValue("LastDir", fileInfo.dir().path());
 		settings.endGroup();
 		// the non XSLT exports are called directly above, the XSLT based ons are called here
-		if (!stylesheet.isEmpty())
+		if (!stylesheet.isEmpty()) {
 			future = QtConcurrent::run(export_dives_xslt, filename.toUtf8(), ui->exportSelected->isChecked(), ui->CSVUnits_2->currentIndex(), stylesheet.toUtf8());
+			MainWindow::instance()->getNotificationWidget()->showNotification("Exporting...", KMessageWidget::Information);
+			MainWindow::instance()->getNotificationWidget()->setFuture(future);
+		}
 	}
 }
 
diff --git a/qt-ui/mainwindow.cpp b/qt-ui/mainwindow.cpp
index 8dcb59c90..de98eb08f 100644
--- a/qt-ui/mainwindow.cpp
+++ b/qt-ui/mainwindow.cpp
@@ -1308,12 +1308,12 @@ int MainWindow::file_save(void)
 
 void MainWindow::showError(QString message)
 {
-	if (message.isEmpty())
-		return;
-	ui.mainErrorMessage->setText(message);
-	ui.mainErrorMessage->setCloseButtonVisible(true);
-	ui.mainErrorMessage->setMessageType(KMessageWidget::Error);
-	ui.mainErrorMessage->animatedShow();
+	ui.mainErrorMessage->showNotification(message, KMessageWidget::Error);
+}
+
+NotificationWidget *MainWindow::getNotificationWidget()
+{
+	return ui.mainErrorMessage;
 }
 
 void MainWindow::setTitle(enum MainWindowTitleFormat format)
diff --git a/qt-ui/mainwindow.h b/qt-ui/mainwindow.h
index 7514a0938..06b180a39 100644
--- a/qt-ui/mainwindow.h
+++ b/qt-ui/mainwindow.h
@@ -13,6 +13,7 @@
 #include <QUuid>
 
 #include "ui_mainwindow.h"
+#include "notificationwidget.h"
 
 struct DiveList;
 class QSortFilterProxyModel;
@@ -92,6 +93,7 @@ public:
 	void setApplicationState(const QByteArray& state);
 	void showV2Dialog();
 	QUndoStack *undoStack;
+	NotificationWidget *getNotificationWidget();
 private
 slots:
 	/* file menu action */
diff --git a/qt-ui/mainwindow.ui b/qt-ui/mainwindow.ui
index 41a85bf8a..82f7bcd7f 100644
--- a/qt-ui/mainwindow.ui
+++ b/qt-ui/mainwindow.ui
@@ -40,7 +40,7 @@
      </widget>
     </item>
     <item>
-     <widget class="KMessageWidget" name="mainErrorMessage" native="true"/>
+     <widget class="NotificationWidget" name="mainErrorMessage" native="true"/>
     </item>
    </layout>
   </widget>
@@ -699,9 +699,9 @@
  </widget>
  <customwidgets>
   <customwidget>
-   <class>KMessageWidget</class>
+   <class>NotificationWidget</class>
    <extends>QWidget</extends>
-   <header>kmessagewidget.h</header>
+   <header>notificationwidget.h</header>
    <container>1</container>
   </customwidget>
   <customwidget>
diff --git a/qt-ui/notificationwidget.cpp b/qt-ui/notificationwidget.cpp
new file mode 100644
index 000000000..44e2eed1b
--- /dev/null
+++ b/qt-ui/notificationwidget.cpp
@@ -0,0 +1,37 @@
+#include "notificationwidget.h"
+
+NotificationWidget::NotificationWidget(QWidget *parent) : KMessageWidget(parent)
+{
+	future_watcher = new QFutureWatcher<void>();
+	connect(future_watcher, SIGNAL(finished()), this, SLOT(finish()));
+}
+
+void NotificationWidget::showNotification(QString message, KMessageWidget::MessageType type)
+{
+	if (message.isEmpty())
+		return;
+	setText(message);
+	setCloseButtonVisible(true);
+	setMessageType(type);
+	animatedShow();
+}
+
+void NotificationWidget::hideNotification()
+{
+	animatedHide();
+}
+
+void NotificationWidget::setFuture(const QFuture<void> &future)
+{
+	future_watcher->setFuture(future);
+}
+
+void NotificationWidget::finish()
+{
+	hideNotification();
+}
+
+NotificationWidget::~NotificationWidget()
+{
+	delete future_watcher;
+}
diff --git a/qt-ui/notificationwidget.h b/qt-ui/notificationwidget.h
new file mode 100644
index 000000000..7a3f93b4d
--- /dev/null
+++ b/qt-ui/notificationwidget.h
@@ -0,0 +1,31 @@
+#ifndef NOTIFICATIONWIDGET_H
+#define NOTIFICATIONWIDGET_H
+
+#include <QWidget>
+#include <QFutureWatcher>
+
+#include <kmessagewidget.h>
+
+namespace Ui {
+	class NotificationWidget;
+}
+
+class NotificationWidget : public KMessageWidget {
+	Q_OBJECT
+
+public:
+	explicit NotificationWidget(QWidget *parent = 0);
+	void setFuture(const QFuture<void> &future);
+	void showNotification(QString message, KMessageWidget::MessageType type);
+	void hideNotification();
+	~NotificationWidget();
+
+private:
+	QFutureWatcher<void> *future_watcher;
+
+private
+slots:
+	void finish();
+};
+
+#endif // NOTIFICATIONWIDGET_H
diff --git a/subsurface.pro b/subsurface.pro
index a9afae426..639fff647 100644
--- a/subsurface.pro
+++ b/subsurface.pro
@@ -111,7 +111,8 @@ HEADERS = \
 	qt-ui/statistics/yearstatistics.h \
 	qt-ui/diveshareexportdialog.h \
 	qt-ui/filtermodels.h \
-	qt-ui/undocommands.h
+	qt-ui/undocommands.h \
+	qt-ui/notificationwidget.h
 
 android: HEADERS -= \
 	qt-ui/usermanual.h \
@@ -209,7 +210,8 @@ SOURCES =  \
 	qt-ui/statistics/monthstatistics.cpp \
 	qt-ui/diveshareexportdialog.cpp \
 	qt-ui/filtermodels.cpp \
-	qt-ui/undocommands.cpp
+	qt-ui/undocommands.cpp \
+	qt-ui/notificationwidget.cpp
 
 android: SOURCES += android.cpp
 else: win32: SOURCES += windows.c