快速为view的工具条中加个下拉列表-优快云博客

本文介绍如何在Eclipse中为自定义视图MyView设置工具栏，并通过CallAction类实现工具栏按钮的功能，包括展示下拉菜单及响应用户交互。

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1.设置view的工具条


	 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.对应的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) {
    			//选择箭头时展开菜单
    			statisticsView.showMenu();
    		}else{  
    			setToolTipText("DDDDDD");
    			。。。。。。 
    		} 
    	} 
    }