Added QScreen::refreshRate() to get the vertical refresh rate.

To give applications that want it the option to use a fixed timestep for
animations, and to avoid having values of 60 hard-coded (we have a
couple of those in qtdeclarative/src/quick already), we need to know the
refresh rates of the screens we are rendering to.

Change-Id: Ife49162e830440ad7eab563a27e8aebbbafc5fc5
Reviewed-by: Girish Ramakrishnan <girish.1.ramakrishnan@nokia.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/src/gui/kernel/qscreen.h b/src/gui/kernel/qscreen.h
index f69e04a595..17f3cd3d43 100644
--- a/src/gui/kernel/qscreen.h
+++ b/src/gui/kernel/qscreen.h
@@ -83,6 +83,7 @@ class Q_GUI_EXPORT QScreen : public QObject
     Q_PROPERTY(QRect availableGeometry READ availableGeometry NOTIFY availableGeometryChanged)
     Q_PROPERTY(Qt::ScreenOrientation primaryOrientation READ orientation NOTIFY primaryOrientationChanged)
     Q_PROPERTY(Qt::ScreenOrientation orientation READ orientation NOTIFY orientationChanged)
+    Q_PROPERTY(qreal refreshRate READ refreshRate NOTIFY refreshRateChanged)
 
 public:
     QPlatformScreen *handle() const;
@@ -127,6 +128,8 @@ public:
 
     QPixmap grabWindow(WId window, int x, int y, int w, int h);
 
+    qreal refreshRate() const;
+
 Q_SIGNALS:
     void sizeChanged(const QSize &size);
     void geometryChanged(const QRect &geometry);
@@ -140,6 +143,7 @@ Q_SIGNALS:
     void availableGeometryChanged(const QRect &rect);
     void primaryOrientationChanged(Qt::ScreenOrientation orientation);
     void orientationChanged(Qt::ScreenOrientation orientation);
+    void refreshRateChanged(qreal refreshRate);
 
 private:
     explicit QScreen(QPlatformScreen *screen);