QCursor: Associate cursor with screen.

- Introduce cursor() accessor to QPlatformScreen.
- Remove screen member of QPlatformCursor (a
  cursor can be shared by multiple screens
  of a virtual desktop).
- Add QCursor::pos()/ QCursor::setPos() taking
  a QScreen-parameter, use primaryScreen() for
  old overloads.  QCursor::pos() can then query
  the platform cursor for the position and return
  the position even if the mouse position is outside
  the windows owned by the Qt application.
- Fix tests

Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>

Task-number: QTBUG-22457
Task-number: QTBUG-22565
Task-number: QTBUG-20753
Change-Id: Ia69f37343f95772e934eab1cd806bd54cbdbbe51
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/gui/kernel/qplatformscreen_qpa.h b/src/gui/kernel/qplatformscreen_qpa.h
index 7d74698074..b6eb91f9b2 100644
--- a/src/gui/kernel/qplatformscreen_qpa.h
+++ b/src/gui/kernel/qplatformscreen_qpa.h
@@ -63,6 +63,7 @@ class QPlatformBackingStore;
 class QPlatformOpenGLContext;
 class QPlatformScreenPrivate;
 class QPlatformWindow;
+class QPlatformCursor;
 class QPlatformScreenPageFlipper;
 class QScreen;
 class QSurfaceFormat;
@@ -103,6 +104,7 @@ public:
     virtual QString name() const { return QString(); }
 
     virtual QPlatformScreenPageFlipper *pageFlipper() const;
+    virtual QPlatformCursor *cursor() const;
 
 protected:
     QScopedPointer<QPlatformScreenPrivate> d_ptr;