Make QGraphicsSystemScreen a QObject

This has several advantages:

We already see the various screen drivers making QObject-based helper
classes for timers, socketNotifiers etc

Also, this gives us more introspection from applications that now can
query things from the screen.

Reviewed-by: TrustMe

2 files changed, 7 insertions, 1 deletions

diff --git a/src/gui/painting/qgraphicssystem.cpp b/src/gui/painting/qgraphicssystem.cpp
index 777b93d..1565c45 100644
--- a/src/gui/painting/qgraphicssystem.cpp
+++ b/src/gui/painting/qgraphicssystem.cpp
@@ -89,6 +89,10 @@ QList<QGraphicsSystemScreen *> QGraphicsSystem::screens() const
     return QList<QGraphicsSystemScreen *>();
 }
 
+QGraphicsSystemScreen::QGraphicsSystemScreen(QObject *parent)
+  : QObject(parent)
+{}
+
 QGraphicsSystemScreen::~QGraphicsSystemScreen()
 {
 }
diff --git a/src/gui/painting/qgraphicssystem_p.h b/src/gui/painting/qgraphicssystem_p.h
index ea1031f..a2d03f0 100644
--- a/src/gui/painting/qgraphicssystem_p.h
+++ b/src/gui/painting/qgraphicssystem_p.h
@@ -60,9 +60,11 @@ QT_BEGIN_NAMESPACE
 
 class QPixmapFilter;
 
-class Q_GUI_EXPORT QGraphicsSystemScreen
+class Q_GUI_EXPORT QGraphicsSystemScreen : public QObject
 {
+    Q_OBJECT
 public:
+    QGraphicsSystemScreen(QObject *parent = 0);
     virtual ~QGraphicsSystemScreen();
 
     virtual QRect geometry() const = 0;