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, 11 insertions, 0 deletions

diff --git a/src/gui/kernel/qplatformscreen_qpa.cpp b/src/gui/kernel/qplatformscreen_qpa.cpp
index c832d853f4..022f198073 100644
--- a/src/gui/kernel/qplatformscreen_qpa.cpp
+++ b/src/gui/kernel/qplatformscreen_qpa.cpp
@@ -41,6 +41,7 @@
 
 #include "qplatformscreen_qpa.h"
 #include <QtGui/qguiapplication.h>
+#include <QtGui/qplatformcursor_qpa.h>
 #include <QtGui/private/qguiapplication_p.h>
 #include <QtGui/private/qplatformscreen_qpa_p.h>
 #include <QtGui/qplatformintegration_qpa.h>
@@ -250,4 +251,14 @@ QPlatformScreenPageFlipper *QPlatformScreen::pageFlipper() const
     return 0;
 }
 
+/*!
+    Reimplement this function in subclass to return the cursor of the screen.
+
+    The default implementation returns 0.
+*/
+QPlatformCursor *QPlatformScreen::cursor() const
+{
+    return 0;
+}
+
 QT_END_NAMESPACE