comparison widgets/Pane.cpp @ 14:aa37f84ab70a

* Add play-selection and looping modes.  Looping seems to work OK, but
  the plain play-selection is miscalculating current frame number to
  feed back to the GUI.
* Cache selection rectanges wherever possible in View::paintEvent.

 	
 	if (!m_manager || !m_manager->isPlaying()) {
 	    int offset = mouseFrame - getStartFrame();
 	    int available = getEndFrame() - getStartFrame();
 	    if (offset >= available * 0.9) {
-		setCentreFrame(m_centreFrame + int(offset - available * 0.9) + 1);
+		int move = int(offset - available * 0.9) + 1;
+		setCentreFrame(m_centreFrame + move);
 	    } else if (offset <= available * 0.15) {
-		setCentreFrame(m_centreFrame - int(available * 0.15 - offset) - 1);
+		int move = int(available * 0.15 - offset) + 1;
+		if (m_centreFrame > move) {
+		    setCentreFrame(m_centreFrame - move);
+		} else {
+		    setCentreFrame(0);
+		}
 	    }
 	}
 
 	update();
     }