core: copy Animations from SettingsObjectWrapper to qPref as its own class

Update set/get functions to follow common name scheme:
- get function have same name as in struct preferences
- set function have set_<name in struct preferences>
- signal function have <name in struct preferences>_changed

one class one .h/.cpp is the C++ idiom. Having load/sync of each
variable in 1 functions (in contrast to the distributed way SettingsObjectWrapper
handles it) secures the same storage name is used. Having the set/get/load/sync
functions grouped together makes it easier to get an overview.

REMARK: this commit only defines the class, it is not active in production
Signed-off-by: Jan Iversen <jani@apache.org>

core/CMakeLists.txt

@@ -100,6 +100,7 @@ set(SUBSURFACE_CORE_LIB_SRCS
 
 	# classes to manage struct preferences for QWidget and QML
 	settings/qPref.cpp
+	settings/qPrefAnimations.cpp
 	settings/qPrefDisplay.cpp
 
 	#Subsurface Qt have the Subsurface structs QObjectified for easy access via QML.

core/settings/qPref.h

@@ -6,6 +6,7 @@
 #include <QSettings>
 #include "core/pref.h"
 
+#include "qPrefAnimations.h"
 #include "qPrefDisplay.h"
 
 class qPref : public QObject {
@@ -34,8 +35,6 @@ public:
 
 	const QString canonical_version() const;
 	const QString mobile_version() const;
-
-private:
 };
 
 #endif

core/settings/qPrefAnimations.cpp

@@ -0,0 +1,20 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "qPref.h"
+#include "qPref_private.h"
+#include "qPrefAnimations.h"
+
+qPrefAnimations::qPrefAnimations(QObject *parent) : QObject(parent)
+{
+}
+qPrefAnimations *qPrefAnimations::instance()
+{
+	static qPrefAnimations *self = new qPrefAnimations;
+	return self;
+}
+
+void qPrefAnimations::loadSync(bool doSync)
+{
+	disk_animation_speed(doSync);
+}
+
+HANDLE_PREFERENCE_INT(Animations, "/animation_speed", animation_speed);

core/settings/qPrefAnimations.h

@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: GPL-2.0
+#ifndef QPREFANIMATIONS_H
+#define QPREFANIMATIONS_H
+
+#include <QObject>
+#include <QSettings>
+
+class qPrefAnimations : public QObject {
+	Q_OBJECT
+	Q_PROPERTY(int animation_speed READ animation_speed WRITE set_animation_speed NOTIFY animation_speed_changed);
+
+public:
+	qPrefAnimations(QObject *parent = NULL);
+	static qPrefAnimations *instance();
+
+	// Load/Sync local settings (disk) and struct preference
+	void loadSync(bool doSync);
+	void load() { loadSync(false); }
+	void sync() { loadSync(true); }
+
+public:
+	int animation_speed() const;
+
+public slots:
+	void set_animation_speed(int value);
+
+signals:
+	void animation_speed_changed(int value);
+
+private:
+	const QString group = QStringLiteral("Animations");
+	QSettings setting;
+
+	// functions to load/sync variable with disk
+	void disk_animation_speed(bool doSync);
+};
+
+#endif