public static void scribbleTab() {
TabItem tab = new TabItem(folder, SWT.CLOSE);
tab.setText("Scribble");
tab.setToolTipText("Simple graphics: drawing");
final Canvas canvas = new Canvas(folder, SWT.NONE);
ScribbleMouseListener sml = new ScribbleMouseListener();
canvas.addMouseListener(sml);
canvas.addMouseMoveListener(sml);
tab.setControl(canvas);
}
