Preferences: start to port preferences to a more sane design

Our preferences dialog right now is a rather huge dialog
with more than 9 subpages, and all of those pages are programmed
inside of the same class, same methods and all that - which means
that if I change something on the dialog I can break any
other thing quite easily.

The idea of this patch series is to make it harder to break
user settings and the settings dialog.

Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

desktop-widgets/CMakeLists.txt

@@ -13,6 +13,8 @@ include_directories(.
 	${CMAKE_BINARY_DIR}
 )
 
+add_subdirectory(preferences)
+
 # the interface, in C++
 set(SUBSURFACE_INTERFACE
 	updatemanager.cpp

desktop-widgets/preferences/CMakeLists.txt

@@ -0,0 +1,9 @@
+# the profile widget
+set(SUBSURFACE_PREFERENCES_LIB_SRCS
+	abstractpreferenceswidget.cpp
+)
+
+source_group("Subsurface Preferences" FILES ${SUBSURFACE_PREFERENCES_LIB_SRCS})
+
+add_library(subsurface_desktop_preferences STATIC ${SUBSURFACE_PREFERENCES_LIB_SRCS})
+target_link_libraries(subsurface_desktop_preferences ${QT_LIBRARIES})

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;
+}

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