QNX: Cleanup some issues in QPA

* Avoided crash, if root window is reparented
* Corrected video window name
* Made parent window member private again

Change-Id: Icef9fad5495413e0de87c4366f25dad6c4fd5775
Reviewed-by: Rafael Roquetto <rafael.roquetto@kdab.com>
Reviewed-by: Kevin Krammer <kevin.krammer@kdab.com>
Reviewed-by: Fabian Bumberger <fbumberger@rim.com>

src/plugins/platforms/qnx/qqnxrasterwindow.cpp

@@ -166,7 +166,7 @@ void QQnxRasterWindow::adjustBufferSize()
 {
     // When having a raster window we don't need any buffers, since
     // Qt will draw to the parent TLW backing store.
-    const QSize windowSize = m_parentWindow ? QSize(1,1) : window()->size();
+    const QSize windowSize = window()->parent() ? QSize(1,1) : window()->size();
     if (windowSize != bufferSize())
         setBufferSize(windowSize);
 }

src/plugins/platforms/qnx/qqnxscreen.cpp

@@ -670,7 +670,7 @@ void QQnxScreen::newWindowCreated(void *window)
         // Otherwise, assume that if a foreign window already has a Z-Order both negative and
         // less than the default Z-Order installed by mmrender on windows it creates,
         // the windows should be treated as an underlay. Otherwise, we treat it as an overlay.
-        if (!windowName.isEmpty() && windowName.startsWith("BbVideoWindowControl")) {
+        if (!windowName.isEmpty() && windowName.startsWith("MmRendererVideoWindowControl")) {
             addMultimediaWindow(windowName, windowHandle);
         } else if (!findWindow(windowHandle)) {
             if (zorder <= MAX_UNDERLAY_ZORDER)

src/plugins/platforms/qnx/qqnxwindow.cpp

@@ -75,9 +75,9 @@ QT_BEGIN_NAMESPACE
 QQnxWindow::QQnxWindow(QWindow *window, screen_context_t context, bool needRootWindow)
     : QPlatformWindow(window),
       m_screenContext(context),
-      m_parentWindow(0),
       m_window(0),
       m_screen(0),
+      m_parentWindow(0),
       m_visible(false),
       m_exposed(true),
       m_windowState(Qt::WindowNoState),
@@ -380,6 +380,11 @@ void QQnxWindow::setParent(const QPlatformWindow *window)
     if (newParent == m_parentWindow)
         return;
 
+    if (screen()->rootWindow() == this) {
+        qWarning() << "Application window cannot be reparented";
+        return;
+    }
+
     removeFromParent();
     m_parentWindow = newParent;
 

src/plugins/platforms/qnx/qqnxwindow.h

@@ -122,8 +122,6 @@ protected:
     screen_context_t m_screenContext;
     QScopedPointer<QQnxAbstractCover> m_cover;
 
-    QQnxWindow *m_parentWindow;
-
 private:
     void createWindowGroup();
     void setGeometryHelper(const QRect &rect);
@@ -137,6 +135,7 @@ private:
     QSize m_bufferSize;
 
     QQnxScreen *m_screen;
+    QQnxWindow *m_parentWindow;
     QList<QQnxWindow*> m_childWindows;
     bool m_visible;
     bool m_exposed;