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); }