winrt: Fix input grabbing

Beside its usage in widgets, mouse grabs are required for QML menus to
work.

Task-number: QTBUG-57079
Change-Id: I306cb68624186da69725470e147bc7b979dac8e4
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>

1 files changed, 23 insertions, 0 deletions

diff --git a/src/plugins/platforms/winrt/qwinrtwindow.cpp b/src/plugins/platforms/winrt/qwinrtwindow.cpp
index 297e6618d1..8f3b86ff3b 100644
--- a/src/plugins/platforms/winrt/qwinrtwindow.cpp
+++ b/src/plugins/platforms/winrt/qwinrtwindow.cpp
@@ -191,6 +191,11 @@ QWinRTWindow::~QWinRTWindow()
     });
     RETURN_VOID_IF_FAILED("Failed to completely destroy window resources, likely because the application is shutting down");
 
+    if (d->screen->mouseGrabWindow() == this)
+        d->screen->setMouseGrabWindow(this, false);
+    if (d->screen->keyboardGrabWindow() == this)
+        d->screen->setKeyboardGrabWindow(this, false);
+
     d->screen->removeWindow(window());
 
     if (!d->surface)
@@ -384,6 +389,24 @@ void QWinRTWindow::setWindowState(Qt::WindowState state)
     d->state = state;
 }
 
+bool QWinRTWindow::setMouseGrabEnabled(bool grab)
+{
+    Q_D(QWinRTWindow);
+    if (!isActive() && grab) {
+        qWarning("%s: Not setting mouse grab for invisible window %s/'%s'",
+                 __FUNCTION__, window()->metaObject()->className(),
+                 qPrintable(window()->objectName()));
+        return false;
+    }
+    return d->screen->setMouseGrabWindow(this, grab);
+}
+
+bool QWinRTWindow::setKeyboardGrabEnabled(bool grab)
+{
+    Q_D(QWinRTWindow);
+    return d->screen->setKeyboardGrabWindow(this, grab);
+}
+
 EGLSurface QWinRTWindow::eglSurface() const
 {
     Q_D(const QWinRTWindow);