protected JToolBar initInputToolbar() {
		JToolBar toolbar = new JToolBar();
		toolbar.add(startAction);
		myPreviousAction = new AbstractAction("Previous") {
			public void actionPerformed(ActionEvent e) {
				previous();
			}
		};
		myPreviousAction.setEnabled(false);
		toolbar.add(myPreviousAction);
		stepAction.setEnabled(false);
		toolbar.add(stepAction);
		
		// Set up the view customizer controls.
		toolbar.addSeparator();

		final JComboBox box = new JComboBox(getViewChoices());
		box.setSelectedIndex(0);
		ActionListener listener = new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				changeView((String) box.getSelectedItem());
			}
		};
		box.addActionListener(listener);
		toolbar.add(box);
		return toolbar;
	}