final JPanel topPane = GUIUtil.createGradientPanel();
Box box;
internalFrames = app.getWindowHandler().usesInternalFrames();
timeTB = new TimelineToolBar( doc );
transTB = new TransportToolBar( doc );
wavePanel = new ComponentHost();
timeAxis = new TimelineAxis( doc, wavePanel );
markAxis = new MarkerAxis( doc, wavePanel );