title: (Py)GTK: How can I force my window to be repainted / call expose-event?
body: <p>Currently I'm drawing some things in a subclass of DrawingArea, where I get a cairo context inside an expose-event and call a draw method from there. (according to some PyGTK tutorial I found)</p>
  
  <p>I'm used to doing a repaint() with java, but how can I get the same effect here?</p>