title: QQuickWindow transparent
body: <p>im using QQmlApplicationEngine with QQuickWindow for an application and i can't
  transparent main window. i want to set a splash before application pops up and i use Window component for it and it should be transparent but it's not, my main.cpp is</p>
  
  <pre><code>int main(int argc, char *argv[])
  {
  Application app(argc, argv);
  
  QShookaClient shooka_client;
  QQmlApplicationEngine engine;
  engine.rootContext()-&gt;setContextProperty("shooka", &amp;shooka_client);
  engine.load(QUrl("qrc:///shooka/shooka.qml"));
  
  QObject *topLevel = engine.rootObjects().value(0);
  QQuickWindow *window = qobject_cast&lt;QQuickWindow *&gt;(topLevel);
  
  window-&gt;show();
  window-&gt;setFlags(Qt::FramelessWindowHint);
  window-&gt;setColor(Qt::transparent);
  
  return app.exec();
  }
  </code></pre>
  
  <p>but setColor doesn't work in win7. i know there is way for QDeclarativeView or even i found solution for QQuickview and it kinda should work for QQuickWindow but no, can anyone help me please..</p>