title: Qt: resizable and movable main window without title bar
body: <p>I need draw a Qt-window without the title bar. Generally this can be easy by just setting the <code>CustomizeWindowHint</code> window attribute. But then window has fixed size and position.</p>
  
  <p>I need a <strong>movable</strong> and <strong>resizable</strong> window. <a href="https://stackoverflow.com/questions/5513060/qt-4-move-window-without-title-bar">This</a> post shows how to move the window manually so I wonder whether there is a way to at least keep the borders resizable.</p>
  
  <p>Of course I can also resize the window manually but I expect jumping windows and many sorts of weird behavior so I hope there is a way to use the existing functionality</p>