快速爲view的工具條中加個下拉列表

1.設置view的工具條

	 MyView extends ViewPart{
		ToolBar toolBar;
		Menu start;
		MenuItem aaa;
		MenuItem bbb; 

		callAction = new CallAction(this);

		initTool(){
	              toolBar = new ToolBar(composite, SWT.NONE);
		      toolBar.setLayoutData(new GridData(SWT.LEFT, SWT.FILL, false, false));
		      ToolBarManager toolBarManager = new ToolBarManager(toolBar);
		      toolBarManager.add(refreshAction); 

		      start = new Menu(toolBar.getShell(),SWT.DOWN); 
		      aaa = new MenuItem(startShowmenu, SWT.PUSH);
		      aaa.setText("1s");
		      bbb = new MenuItem(startShowmenu, SWT.PUSH);
		      bbb.setText("2s");

		      aaa.addSelectionListener(new SelectionAdapter(){widgetSelect});
		      //****
		      toolBarManager.add(callAction);
		      toolBarManager.update(true); 

		}	

		public void showMenu(){
		 Rectangle rect = toolBar.getItem(1).getBounds();
		 Point point = new Point(rect.x,rect.y+rect.height); 
		 point = toolBar.toDisplay(point);
		 startShowmenu.setLocation(point);  
		 startShowmenu.setVisible(true); 

		 oneItem.setEnabled(true);
		 twoItem.setEnabled(true); 
		 }	

	}

2.對應的action加操作

 class CallAction extends Action{
    	private MyView myView; 
		public CallAction(MyView view) {
			super("xxx", ImageUtil.getInstance().getImageDescriptor("xxx"));
			this.myView = view;

			setMenuCreator(new IMenuCreator() {
				@Override
				public Menu getMenu(Menu parent) {
					return null;
				}

				@Override
				public Menu getMenu(Control parent) {
					return null;
				}

				@Override
				public void dispose() {
				}
			});
			setToolTipText("-----------"); 
 			setText("********");
		}
    	@Override
    	public void run() {
    		myView.showMenu();
    	}

    	@Override
    	public void runWithEvent(Event event) {
    		if (event.detail == SWT.ARROW) {
    			//選擇箭頭時展開菜單
    			statisticsView.showMenu();
    		}else{  
    			setToolTipText("DDDDDD");
    			。。。。。。 
    		} 
    	} 
    }