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

1 files changed, 4 insertions, 0 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()
 {
 }