);
aLeftViewSplitPane.setDividerLocation (300);
aLeftViewSplitPane.setContinuousLayout (true);
// Canvas.
maCanvas = new Canvas ();
maCanvas.SetTree (maTree);
JScrollPane aScrolledCanvas = new JScrollPane(maCanvas,
JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
aScrolledCanvas.getViewport().setBackground (java.awt.Color.RED);