Make QWindow update its screen when moved to a different one

Also implements the Cocoa backend for that.

Change-Id: I32977e12a04e1cf48b12333442482746c69ce133
Reviewed-by: Samuel Rødal <samuel.rodal@digia.com>
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>

1 files changed, 12 insertions, 1 deletions

diff --git a/src/gui/kernel/qwindowsysteminterface_p.h b/src/gui/kernel/qwindowsysteminterface_p.h
index a6ea15c5f2..c4968f8ca6 100644
--- a/src/gui/kernel/qwindowsysteminterface_p.h
+++ b/src/gui/kernel/qwindowsysteminterface_p.h
@@ -91,7 +91,8 @@ public:
         PlatformPanel = UserInputEvent | 0x17,
         ContextMenu = UserInputEvent | 0x18,
         ApplicationStateChanged = 0x19,
-        FlushEvents = 0x20
+        FlushEvents = 0x20,
+        WindowScreenChanged = 0x21
     };
 
     class WindowSystemEvent {
@@ -158,6 +159,16 @@ public:
         Qt::WindowState newState;
     };
 
+    class WindowScreenChangedEvent : public WindowSystemEvent {
+    public:
+        WindowScreenChangedEvent(QWindow *w, QScreen *s)
+            : WindowSystemEvent(WindowScreenChanged), window(w), screen(s)
+        { }
+
+        QPointer<QWindow> window;
+        QPointer<QScreen> screen;
+    };
+
     class ApplicationStateChangedEvent : public WindowSystemEvent {
     public:
         ApplicationStateChangedEvent(Qt::ApplicationState newState)