core: add qPref.h_and qPrefprivate.h

add 2 header files and 1 cpp file (qPrefPrivate does not have an implementation)

The rewrite/consoliadation of SettingsObjectWrapper, qmlmanager, qmlpref and planner
needs a place to put common private parts (qPrefPrivate) and 1 common class (qPref).

Signed-off-by: Jan Iversen <jani@apache.org>

4 files changed, 118 insertions, 0 deletions

diff --git a/core/CMakeLists.txt b/core/CMakeLists.txt
index de9f9edae..694108b1c 100644
--- a/core/CMakeLists.txt
+++ b/core/CMakeLists.txt
@@ -98,6 +98,9 @@ set(SUBSURFACE_CORE_LIB_SRCS
 	windowtitleupdate.cpp
 	worldmap-save.c
 
+	# classes to manage struct preferences for QWidget and QML
+	settings/qPref.cpp
+
 	#Subsurface Qt have the Subsurface structs QObjectified for easy access via QML.
 	subsurface-qt/DiveObjectHelper.cpp
 	subsurface-qt/CylinderObjectHelper.cpp
diff --git a/core/settings/qPref.cpp b/core/settings/qPref.cpp
new file mode 100644
index 000000000..b703c1fcb
--- /dev/null
+++ b/core/settings/qPref.cpp
@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "qPref_private.h"
+#include "qPref.h"
+
+
+qPref *qPref::m_instance = NULL;
+qPref *qPref::instance()
+{
+	if (!m_instance)
+		m_instance = new qPref;
+	return m_instance;
+}
+
+
+
+void qPref::loadSync(bool doSync)
+{
+}
diff --git a/core/settings/qPref.h b/core/settings/qPref.h
new file mode 100644
index 000000000..4170e5e64
--- /dev/null
+++ b/core/settings/qPref.h
@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: GPL-2.0
+#ifndef QPREF_H
+#define QPREF_H
+
+#include <QObject>
+#include "core/pref.h"
+
+class qPref : public QObject {
+	Q_OBJECT
+
+public:
+	qPref(QObject *parent = NULL) : QObject(parent) {};
+	~qPref() {};
+	static qPref *instance();
+
+	// Load/Sync local settings (disk) and struct preference
+	void loadSync(bool doSync);
+
+public:
+
+private:
+	static qPref *m_instance;
+};
+
+#endif
diff --git a/core/settings/qPref_private.h b/core/settings/qPref_private.h
new file mode 100644
index 000000000..96a3b1e5e
--- /dev/null
+++ b/core/settings/qPref_private.h
@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: GPL-2.0
+#ifndef QPREFPRIVATE_H
+#define QPREFPRIVATE_H
+
+// Header used by all qPref<class> implementations to avoid duplicating code
+
+#include <QObject>
+#include <QSettings>
+#include <QVariant>
+#include "core/qthelper.h"
+
+#define COPY_TXT(name, string) \
+{ \
+	free((void *)prefs.name); \
+	prefs.name = copy_qstring(string); \
+}
+
+#define LOADSYNC_INT(name, field) \
+{ \
+	QSettings s; \
+	if (doSync) \
+		s.setValue(group + name, prefs.field); \
+	else \
+		prefs.field = s.value(group + name, default_prefs.field).toInt(); \
+}
+
+#define LOADSYNC_INT_DEF(name, field, defval) \
+{ \
+	QSettings s; \
+	if (doSync)	\
+		s.setValue(group + name, prefs.field); \
+	else \
+		prefs.field = s.value(group + name, defval).toInt(); \
+}
+
+#define LOADSYNC_ENUM(name, type, field) \
+{ \
+	QSettings s; \
+	if (doSync)	\
+		s.setValue(group + name, prefs.field); \
+	else \
+		prefs.field = (enum type)s.value(group + name, default_prefs.field).toInt(); \
+}
+
+#define LOADSYNC_BOOL(name, field) \
+{ \
+	QSettings s; \
+	if (doSync)	\
+		s.setValue(group + name, prefs.field); \
+	else \
+		prefs.field = s.value(group + name, default_prefs.field).toBool(); \
+}
+
+#define LOADSYNC_DOUBLE(name, field) \
+{ \
+	QSettings s; \
+	if (doSync)	\
+		s.setValue(group + name, prefs.field); \
+	else \
+		prefs.field = s.value(group + name, default_prefs.field).toDouble(); \
+}
+
+#define LOADSYNC_TXT(name, field) \
+{ \
+	QSettings s; \
+	if (doSync)	\
+		s.setValue(group + name, prefs.field); \
+	else \
+		prefs.field = copy_qstring(s.value(group + name, default_prefs.field).toString()); \
+}
+
+#endif