Merge remote-tracking branch 'origin/5.9' into 5.10

 Conflicts:
	src/corelib/global/qconfig-bootstrapped.h
	src/corelib/global/qglobal.h
	src/corelib/tools/qcryptographichash.cpp
	src/corelib/tools/qcryptographichash.h
	src/corelib/tools/qmessageauthenticationcode.cpp
	src/plugins/platforms/windows/qwindowswindow.h
	tests/auto/gui/kernel/qwindow/BLACKLIST
	tests/auto/widgets/itemviews/qitemdelegate/BLACKLIST

Change-Id: Ib68112de985a3d714c2071f47c10e907e4f0229a

7 files changed, 60 insertions, 13 deletions

diff --git a/src/plugins/platforms/windows/qtwindowsglobal.h b/src/plugins/platforms/windows/qtwindowsglobal.h
index d9c342be27..c8bdc1c93e 100644
--- a/src/plugins/platforms/windows/qtwindowsglobal.h
+++ b/src/plugins/platforms/windows/qtwindowsglobal.h
@@ -101,6 +101,8 @@ enum WindowsEventType // Simplify event types
     FocusOutEvent = WindowEventFlag + 18,
     WhatsThisEvent = WindowEventFlag + 19,
     DpiChangedEvent = WindowEventFlag + 21,
+    EnterSizeMoveEvent = WindowEventFlag + 22,
+    ExitSizeMoveEvent = WindowEventFlag + 23,
     MouseEvent = MouseEventFlag + 1,
     MouseWheelEvent = MouseEventFlag + 2,
     CursorEvent = MouseEventFlag + 3,
@@ -282,6 +284,10 @@ inline QtWindows::WindowsEventType windowsEventType(UINT message, WPARAM wParamI
         return HIWORD(wParamIn) ? QtWindows::AcceleratorCommandEvent : QtWindows::MenuCommandEvent;
     case WM_DPICHANGED:
         return QtWindows::DpiChangedEvent;
+    case WM_ENTERSIZEMOVE:
+        return QtWindows::EnterSizeMoveEvent;
+    case WM_EXITSIZEMOVE:
+        return QtWindows::ExitSizeMoveEvent;
     default:
         break;
     }
diff --git a/src/plugins/platforms/windows/qwindowscontext.cpp b/src/plugins/platforms/windows/qwindowscontext.cpp
index 7683f0da4d..289a61336f 100644
--- a/src/plugins/platforms/windows/qwindowscontext.cpp
+++ b/src/plugins/platforms/windows/qwindowscontext.cpp
@@ -1081,6 +1081,13 @@ bool QWindowsContext::windowsProc(HWND hwnd, UINT message,
         if (platformWindow->frameStrutEventsEnabled())
             return sessionManagerInteractionBlocked() || d->m_mouseHandler.translateMouseEvent(platformWindow->window(), hwnd, et, msg, result);
         break;
+    case QtWindows::EnterSizeMoveEvent:
+        platformWindow->setFlag(QWindowsWindow::ResizeMoveActive);
+        return true;
+    case QtWindows::ExitSizeMoveEvent:
+        platformWindow->clearFlag(QWindowsWindow::ResizeMoveActive);
+        platformWindow->checkForScreenChanged();
+        return true;
     case QtWindows::ScrollEvent:
         return sessionManagerInteractionBlocked() || d->m_mouseHandler.translateScrollEvent(platformWindow->window(), hwnd, msg, result);
     case QtWindows::MouseWheelEvent:
diff --git a/src/plugins/platforms/windows/qwindowsmousehandler.cpp b/src/plugins/platforms/windows/qwindowsmousehandler.cpp
index af4304cb19..2b14edc804 100644
--- a/src/plugins/platforms/windows/qwindowsmousehandler.cpp
+++ b/src/plugins/platforms/windows/qwindowsmousehandler.cpp
@@ -233,6 +233,7 @@ bool QWindowsMouseHandler::translateMouseEvent(QWindow *window, HWND hwnd,
     // Check for events synthesized from touch. Lower 7 bits are touch/pen index, bit 8 indicates touch.
     // However, when tablet support is active, extraInfo is a packet serial number. This is not a problem
     // since we do not want to ignore mouse events coming from a tablet.
+    // See https://msdn.microsoft.com/en-us/library/windows/desktop/ms703320.aspx
     const quint64 extraInfo = quint64(GetMessageExtraInfo());
     if ((extraInfo & signatureMask) == miWpSignature) {
         if (extraInfo & 0x80) { // Bit 7 indicates touch event, else tablet pen.
diff --git a/src/plugins/platforms/windows/qwindowsscreen.cpp b/src/plugins/platforms/windows/qwindowsscreen.cpp
index 3a4793efcd..cfddb3cc71 100644
--- a/src/plugins/platforms/windows/qwindowsscreen.cpp
+++ b/src/plugins/platforms/windows/qwindowsscreen.cpp
@@ -566,4 +566,19 @@ const QWindowsScreen *QWindowsScreenManager::screenAtDp(const QPoint &p) const
     return Q_NULLPTR;
 }
 
+const QWindowsScreen *QWindowsScreenManager::screenForHwnd(HWND hwnd) const
+{
+    HMONITOR hMonitor = MonitorFromWindow(hwnd, MONITOR_DEFAULTTONULL);
+    if (hMonitor == NULL)
+        return nullptr;
+    const auto it =
+        std::find_if(m_screens.cbegin(), m_screens.cend(),
+                     [hMonitor](const QWindowsScreen *s)
+                     {
+                         return s->data().hMonitor == hMonitor
+                             && (s->data().flags & QWindowsScreenData::VirtualDesktop) != 0;
+                     });
+    return it != m_screens.cend() ? *it : nullptr;
+}
+
 QT_END_NAMESPACE
diff --git a/src/plugins/platforms/windows/qwindowsscreen.h b/src/plugins/platforms/windows/qwindowsscreen.h
index 9a8997326b..7cf73f03af 100644
--- a/src/plugins/platforms/windows/qwindowsscreen.h
+++ b/src/plugins/platforms/windows/qwindowsscreen.h
@@ -134,6 +134,7 @@ public:
     const WindowsScreenList &screens() const { return m_screens; }
 
     const QWindowsScreen *screenAtDp(const QPoint &p) const;
+    const QWindowsScreen *screenForHwnd(HWND hwnd) const;
 
 private:
     void removeScreen(int index);
diff --git a/src/plugins/platforms/windows/qwindowswindow.cpp b/src/plugins/platforms/windows/qwindowswindow.cpp
index 3f417fde27..312ff9065f 100644
--- a/src/plugins/platforms/windows/qwindowswindow.cpp
+++ b/src/plugins/platforms/windows/qwindowswindow.cpp
@@ -896,7 +896,9 @@ void QWindowsBaseWindow::hide_sys() // Normal hide, do not activate other window
 void QWindowsBaseWindow::raise_sys()
 {
     qCDebug(lcQpaWindows) << __FUNCTION__ << this << window();
-    if (window()->type() == Qt::Popup
+    const Qt::WindowType type = window()->type();
+    if (type == Qt::Popup
+        || type == Qt::SubWindow // Special case for QTBUG-63121: MDI subwindows with WindowStaysOnTopHint
         || (window()->flags() & (Qt::WindowStaysOnTopHint | Qt::WindowStaysOnBottomHint)) == 0) {
         SetWindowPos(handle(), HWND_TOP, 0, 0, 0, 0, SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOSIZE);
     }
@@ -1629,6 +1631,26 @@ void QWindowsWindow::handleResized(int wParam)
     }
 }
 
+void QWindowsWindow::checkForScreenChanged()
+{
+    if (parent())
+        return;
+
+    QPlatformScreen *currentScreen = screen();
+    const auto &screenManager = QWindowsContext::instance()->screenManager();
+    // QTBUG-62971: When dragging a window by its border, detect by mouse position
+    // to prevent it from oscillating between screens when it resizes
+    const QWindowsScreen *newScreen = testFlag(ResizeMoveActive)
+        ? screenManager.screenAtDp(QWindowsCursor::mousePosition())
+        : screenManager.screenForHwnd(m_data.hwnd);
+    if (newScreen != nullptr && newScreen != currentScreen) {
+        qCDebug(lcQpaWindows).noquote().nospace() << __FUNCTION__
+            << ' ' << window() << " \"" << currentScreen->name()
+            << "\"->\"" << newScreen->name() << '"';
+        QWindowSystemInterface::handleWindowScreenChanged(window(), newScreen->screen());
+    }
+}
+
 void QWindowsWindow::handleGeometryChange()
 {
     const QRect previousGeometry = m_data.geometry;
@@ -1642,17 +1664,9 @@ void QWindowsWindow::handleGeometryChange()
         && !(m_data.geometry.width() > previousGeometry.width() || m_data.geometry.height() > previousGeometry.height())) {
         fireExpose(QRect(QPoint(0, 0), m_data.geometry.size()), true);
     }
-    if (!parent() && previousGeometry.topLeft() != m_data.geometry.topLeft()) {
-        HMONITOR hMonitor = MonitorFromWindow(m_data.hwnd, MONITOR_DEFAULTTONULL);
-        QPlatformScreen *currentScreen = screen();
-        const auto screens = QWindowsContext::instance()->screenManager().screens();
-        auto newScreenIt = std::find_if(screens.begin(), screens.end(), [&](QWindowsScreen *s) {
-            return s->data().hMonitor == hMonitor
-                && s->data().flags & QWindowsScreenData::VirtualDesktop;
-        });
-        if (newScreenIt != screens.end() && *newScreenIt != currentScreen)
-            QWindowSystemInterface::handleWindowScreenChanged(window(), (*newScreenIt)->screen());
-    }
+
+    checkForScreenChanged();
+
     if (testFlag(SynchronousGeometryChangeEvent))
         QWindowSystemInterface::flushWindowSystemEvents(QEventLoop::ExcludeUserInputEvents);
 
diff --git a/src/plugins/platforms/windows/qwindowswindow.h b/src/plugins/platforms/windows/qwindowswindow.h
index f0789e5167..414d4a92f8 100644
--- a/src/plugins/platforms/windows/qwindowswindow.h
+++ b/src/plugins/platforms/windows/qwindowswindow.h
@@ -217,7 +217,8 @@ public:
         Compositing = 0x200000,
         HasBorderInFullScreen = 0x400000,
         WithinDpiChanged = 0x800000,
-        VulkanSurface = 0x1000000
+        VulkanSurface = 0x1000000,
+        ResizeMoveActive = 0x2000000
     };
 
     QWindowsWindow(QWindow *window, const QWindowsWindowData &data);
@@ -328,6 +329,8 @@ public:
     void alertWindow(int durationMs = 0);
     void stopAlertWindow();
 
+    void checkForScreenChanged();
+
     static void setTouchWindowTouchTypeStatic(QWindow *window, QWindowsWindowFunctions::TouchWindowTouchTypes touchTypes);
     void registerTouchWindow(QWindowsWindowFunctions::TouchWindowTouchTypes touchTypes = QWindowsWindowFunctions::NormalTouch);
     static void setHasBorderInFullScreenStatic(QWindow *window, bool border);