I'd like to override my QGraphicsView's behavior when the QGraphicsScene inside it isn't in a certain state. I want to do this to prevent graphic items that have the ItemIsSelectable flag enabled from being selected.

This is what I tried.

Qt Code: 
  1. void MyCustomGraphicsViewImplementation::mousePressEvent(QMouseEvent *event) {
  2.     MyCustomGraphicsSceneImplementation* theScene = dynamic_cast<MyCustomGraphicsSceneImplementation*>(this->scene());
  3.  
  4.     if (theScene) {
  5.         /* Is our scene in Select mode? Then we'll follow the default implementation
  6.          * of mousePressEvent. */
  7.         if (theScene->getSceneMode() == MyCustomGraphicsSceneImplementation::Select) {
  8.             QGraphicsView::mousePressEvent(event);
  9.         }
  10.         /* If we're in another scene mode, just send out the mouse event to the graphics scene without selecting anything */
  11.         else {
  12.             QMouseEvent gsEvent(QEvent::MouseButtonPress, event->pos(), Qt::LeftButton, Qt::LeftButton, Qt::NoModifier);
  13.             QApplication::sendEvent(theScene, &gsEvent);
  14.         }
  15.     }
  16. }
To copy to clipboard, switch view to plain text mode 

This code compiles, but the mouse press event doesn't register correctly with the scene. How can I redirect the mouse event to the graphics scene without executing QGraphicsView::mousePressEvent?