1 files changed, 42 insertions, 14 deletions

diff --git a/src/plugins/platforms/windows/qwindowswindow.h b/src/plugins/platforms/windows/qwindowswindow.h
index 958564aa86..1f8800272b 100644
--- a/src/plugins/platforms/windows/qwindowswindow.h
+++ b/src/plugins/platforms/windows/qwindowswindow.h
@@ -66,9 +66,12 @@ struct QWindowsGeometryHint
     static QMargins frame(const QWindow *w, const QRect &geometry,
                           DWORD style, DWORD exStyle);
     static bool handleCalculateSize(const QMargins &customMargins, const MSG &msg, LRESULT *result);
+    static void applyToMinMaxInfo(const QWindow *w, const QScreen *screen,
+                                  const QMargins &margins, MINMAXINFO *mmi);
     static void applyToMinMaxInfo(const QWindow *w, const QMargins &margins,
                                   MINMAXINFO *mmi);
-    static void frameSizeConstraints(const QWindow *w, const QMargins &margins,
+    static void frameSizeConstraints(const QWindow *w, const QScreen *screen,
+                                     const QMargins &margins,
                                      QSize *minimumSize, QSize *maximumSize);
     static inline QPoint mapToGlobal(HWND hwnd, const QPoint &);
     static inline QPoint mapToGlobal(const QWindow *w, const QPoint &);
@@ -80,16 +83,20 @@ struct QWindowsGeometryHint
 
 struct QWindowCreationContext
 {
-    explicit QWindowCreationContext(const QWindow *w,
+    explicit QWindowCreationContext(const QWindow *w, const QScreen *s,
                                     const QRect &geometryIn, const QRect &geometry,
                                     const QMargins &customMargins,
                                     DWORD style, DWORD exStyle);
     void applyToMinMaxInfo(MINMAXINFO *mmi) const;
 
     const QWindow *window;
+    // The screen to use to scale size constraints, etc. Might differ from the
+    // screen of the window after QPlatformWindow::initialGeometry() (QTBUG-77307).
+    const QScreen *screen;
     QRect requestedGeometryIn; // QWindow scaled
     QRect requestedGeometry; // after QPlatformWindow::initialGeometry()
-    QRect obtainedGeometry;
+    QPoint obtainedPos;
+    QSize obtainedSize;
     QMargins margins;
     QMargins customMargins;  // User-defined, additional frame for WM_NCCALCSIZE
     int frameX = CW_USEDEFAULT; // Passed on to CreateWindowEx(), including frame.
@@ -105,7 +112,7 @@ struct QWindowsWindowData
     QRect geometry;
     QMargins fullFrameMargins; // Do not use directly for windows, see FrameDirty.
     QMargins customMargins;    // User-defined, additional frame for NCCALCSIZE
-    HWND hwnd = 0;
+    HWND hwnd = nullptr;
     bool embedded = false;
     bool hasFrame = false;
 
@@ -116,7 +123,7 @@ struct QWindowsWindowData
 
 class QWindowsBaseWindow : public QPlatformWindow
 {
-    Q_DISABLE_COPY(QWindowsBaseWindow)
+    Q_DISABLE_COPY_MOVE(QWindowsBaseWindow)
 public:
     explicit QWindowsBaseWindow(QWindow *window) : QPlatformWindow(window) {}
 
@@ -134,6 +141,7 @@ public:
 
     unsigned style() const   { return GetWindowLongPtr(handle(), GWL_STYLE); }
     unsigned exStyle() const { return GetWindowLongPtr(handle(), GWL_EXSTYLE); }
+    static bool isRtlLayout(HWND hwnd);
 
     static QWindowsBaseWindow *baseWindowOf(const QWindow *w);
     static HWND handleOf(const QWindow *w);
@@ -355,7 +363,7 @@ private:
     inline void setParent_sys(const QPlatformWindow *parent);
     inline void updateTransientParent() const;
     void destroyWindow();
-    inline bool isDropSiteEnabled() const { return m_dropTarget != 0; }
+    inline bool isDropSiteEnabled() const { return m_dropTarget != nullptr; }
     void setDropSiteEnabled(bool enabled);
     void updateDropSite(bool topLevel);
     void handleGeometryChange();
@@ -366,7 +374,7 @@ private:
     mutable QWindowsWindowData m_data;
     QPointer<QWindowsMenuBar> m_menuBar;
     mutable unsigned m_flags = WithinCreate;
-    HDC m_hdc = 0;
+    HDC m_hdc = nullptr;
     Qt::WindowStates m_windowState = Qt::WindowNoState;
     qreal m_opacity = 1;
 #ifndef QT_NO_CURSOR
@@ -376,15 +384,15 @@ private:
     unsigned m_savedStyle = 0;
     QRect m_savedFrameGeometry;
     const QSurfaceFormat m_format;
-    HICON m_iconSmall = 0;
-    HICON m_iconBig = 0;
+    HICON m_iconSmall = nullptr;
+    HICON m_iconBig = nullptr;
     void *m_surface = nullptr;
 
     static bool m_screenForGLInitialized;
 
 #if QT_CONFIG(vulkan)
     // note: intentionally not using void * in order to avoid breaking x86
-    VkSurfaceKHR m_vkSurface = 0;
+    VkSurfaceKHR m_vkSurface = VK_NULL_HANDLE;
 #endif
     static bool m_borderInFullScreenDefault;
 };
@@ -399,18 +407,38 @@ QDebug operator<<(QDebug d, const WINDOWPOS &);
 QDebug operator<<(QDebug d, const GUID &guid);
 #endif // !QT_NO_DEBUG_STREAM
 
+static inline void clientToScreen(HWND hwnd, POINT *wP)
+{
+    if (QWindowsBaseWindow::isRtlLayout(hwnd)) {
+        RECT clientArea;
+        GetClientRect(hwnd, &clientArea);
+        wP->x = clientArea.right - wP->x;
+    }
+    ClientToScreen(hwnd, wP);
+}
+
+static inline void screenToClient(HWND hwnd, POINT *wP)
+{
+    ScreenToClient(hwnd, wP);
+    if (QWindowsBaseWindow::isRtlLayout(hwnd)) {
+        RECT clientArea;
+        GetClientRect(hwnd, &clientArea);
+        wP->x = clientArea.right - wP->x;
+    }
+}
+
 // ---------- QWindowsGeometryHint inline functions.
 QPoint QWindowsGeometryHint::mapToGlobal(HWND hwnd, const QPoint &qp)
 {
     POINT p = { qp.x(), qp.y() };
-    ClientToScreen(hwnd, &p);
+    clientToScreen(hwnd, &p);
     return QPoint(p.x, p.y);
 }
 
 QPoint QWindowsGeometryHint::mapFromGlobal(const HWND hwnd, const QPoint &qp)
 {
     POINT p = { qp.x(), qp.y() };
-    ScreenToClient(hwnd, &p);
+    screenToClient(hwnd, &p);
     return QPoint(p.x, p.y);
 }
 
@@ -449,11 +477,11 @@ inline void QWindowsWindow::destroyIcon()
 {
     if (m_iconBig) {
         DestroyIcon(m_iconBig);
-        m_iconBig = 0;
+        m_iconBig = nullptr;
     }
     if (m_iconSmall) {
         DestroyIcon(m_iconSmall);
-        m_iconSmall = 0;
+        m_iconSmall = nullptr;
     }
 }