title: Transparent Background in QWebEnginePage
body: <p>We are trying to port some application from Qt 4 to Qt 5.4. The Qt 5.4 has a new web engine. We used to make the background of <code>QWebView</code> and <code>QWebPage</code> to be transparent:</p>
  
  <pre><code>view = new QWebView(this);
  QPalette palette = view-&gt;palette();
  palette.setBrush(QPalette::Base, Qt::transparent);
  view-&gt;page()-&gt;setPalette(palette);
  view-&gt;setAttribute(Qt::WA_OpaquePaintEvent, false);
  </code></pre>
  
  <p>But this code doesn't work for <code>QWebEngineView</code> and <code>QWebEnginePage</code>. The point is that <code>QWebEnginePage</code> doesn't have such an API like <code>setPalette</code>.</p>
  
  <p>Can anyone find a way to solve this?</p>