Windows QPA: Reimplement calculation of window frames

Instead of relying on AdjustWindowRectEx() and dirty-handling,
capture the rectangles before and after the processing of
WM_NCCALCSIZE and calculate the frame from that. This allows
for changing window frames by handling WM_NCCALCSIZE and
monitor-dependent window frames when using High DPI scaling.

Task-number: QTBUG-53255
Task-number: QTBUG-40578
Task-number: QTBUG-56591
Change-Id: If8364a5440a6324ea5d470bf5b74e68942285abe
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/plugins/platforms/windows/qwindowswindow.h b/src/plugins/platforms/windows/qwindowswindow.h
index 90b0940813..dd433a3ca8 100644
--- a/src/plugins/platforms/windows/qwindowswindow.h
+++ b/src/plugins/platforms/windows/qwindowswindow.h
@@ -189,7 +189,6 @@ public:
     {
         AutoMouseCapture = 0x1, //! Automatic mouse capture on button press.
         WithinSetParent = 0x2,
-        FrameDirty = 0x4,            //! Frame outdated by setStyle, recalculate in next query.
         OpenGLSurface = 0x10,
         OpenGL_ES2 = 0x20,
         OpenGLDoubleBuffered = 0x40,
@@ -244,6 +243,7 @@ public:
     static bool handleGeometryChangingMessage(MSG *message, const QWindow *qWindow, const QMargins &marginsDp);
     bool handleGeometryChanging(MSG *message) const;
     QMargins frameMargins() const Q_DECL_OVERRIDE;
+    void setFrameMargins(const QMargins &newMargins);
 
     void setOpacity(qreal level) Q_DECL_OVERRIDE;
     void setMask(const QRegion &region) Q_DECL_OVERRIDE;