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, 9 insertions, 0 deletions

diff --git a/src/gui/kernel/qwindowsysteminterface_qpa_p.h b/src/gui/kernel/qwindowsysteminterface_qpa_p.h
index d7be7699e9..c7ad197b3c 100644
--- a/src/gui/kernel/qwindowsysteminterface_qpa_p.h
+++ b/src/gui/kernel/qwindowsysteminterface_qpa_p.h
@@ -66,6 +66,7 @@ public:
         ScreenGeometry,
         ScreenAvailableGeometry,
         ScreenLogicalDotsPerInch,
+        ScreenRefreshRate,
         ThemeChange,
         Expose
     };
@@ -233,6 +234,14 @@ public:
         qreal dpiY;
     };
 
+    class ScreenRefreshRateEvent : public WindowSystemEvent {
+    public:
+        ScreenRefreshRateEvent(QScreen *s, qreal r)
+            : WindowSystemEvent(ScreenRefreshRate), screen(s), rate(r) { }
+        QWeakPointer<QScreen> screen;
+        qreal rate;
+    };
+
     class ThemeChangeEvent : public WindowSystemEvent {
     public:
         explicit ThemeChangeEvent(QWindow * w)