winrt: only update window title for top level widgets

Previously we always updated the window title, independently whether the
window was visible / the toplevel one. This can also cause troubles when
setting the title during initialization.

Change-Id: I02ec0f0e385fa490f641ce83a6cb27717a31620f
Reviewed-by: Maurice Kalinowski <maurice.kalinowski@qt.io>

1 files changed, 2 insertions, 6 deletions

diff --git a/src/plugins/platforms/winrt/qwinrtscreen.cpp b/src/plugins/platforms/winrt/qwinrtscreen.cpp
index 77185f1bb9..dd2ebee3d5 100644
--- a/src/plugins/platforms/winrt/qwinrtscreen.cpp
+++ b/src/plugins/platforms/winrt/qwinrtscreen.cpp
@@ -764,6 +764,7 @@ void QWinRTScreen::addWindow(QWindow *window)
         return;
 
     d->visibleWindows.prepend(window);
+    updateWindowTitle(window->title());
     QWindowSystemInterface::handleWindowActivated(window, Qt::OtherFocusReason);
     handleExpose();
     QWindowSystemInterface::flushWindowSystemEvents();
@@ -813,15 +814,10 @@ void QWinRTScreen::lower(QWindow *window)
     handleExpose();
 }
 
-void QWinRTScreen::updateWindowTitle()
+void QWinRTScreen::updateWindowTitle(const QString &title)
 {
     Q_D(QWinRTScreen);
 
-    QWindow *window = topWindow();
-    if (!window)
-        return;
-
-    const QString title = window->title();
     HStringReference titleRef(reinterpret_cast<LPCWSTR>(title.utf16()), title.length());
     HRESULT hr = d->view->put_Title(titleRef.Get());
     RETURN_VOID_IF_FAILED("Unable to set window title");