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, 7 insertions, 0 deletions

diff --git a/src/gui/kernel/qwindowsysteminterface_qpa.cpp b/src/gui/kernel/qwindowsysteminterface_qpa.cpp
index 83cf8c338c..c3136b0b0a 100644
--- a/src/gui/kernel/qwindowsysteminterface_qpa.cpp
+++ b/src/gui/kernel/qwindowsysteminterface_qpa.cpp
@@ -434,6 +434,13 @@ void QWindowSystemInterface::handleScreenLogicalDotsPerInchChange(QScreen *scree
     QWindowSystemInterfacePrivate::queueWindowSystemEvent(e);
 }
 
+void QWindowSystemInterface::handleScreenRefreshRateChange(QScreen *screen, qreal newRefreshRate)
+{
+    QWindowSystemInterfacePrivate::ScreenRefreshRateEvent *e =
+            new QWindowSystemInterfacePrivate::ScreenRefreshRateEvent(screen, newRefreshRate);
+    QWindowSystemInterfacePrivate::queueWindowSystemEvent(e);
+}
+
 void QWindowSystemInterface::handleThemeChange(QWindow *tlw)
 {
     QWindowSystemInterfacePrivate::ThemeChangeEvent *e = new QWindowSystemInterfacePrivate::ThemeChangeEvent(tlw);