gxt的笔记1

gxt的笔记1

1、gxt用boeder布局时，看不见界面时，可能是要用子控件要用fitlayout布局。

 

2、grid列自动缩放：            

     grid.setStripeRows ( true ); grid.setAutoExpandColumn ( " info " ); 
    grid.setAutoExpandMin ( 80 ); 
    grid.getView ().setForceFit ( true ); 

 

3、对于tab页面，要想grid列宽度自适应的话还要加一下条件：

     messagePanel.setLayoutData ( new  FitLayout()); 
    loggerTab  =   new  TabItem ( " 系统日志 " );
    loggerTab.setLayoutData ( new  FitLayout()); 
    loggerTab.setLayoutOnChange ( true ); 
    loggerTab.add (getLoggerPanel ()); 
    messagePanel.add (loggerTab); 

         而且不能设置为自动宽度。

 

4、布局不起作用，可能是setLayout写成了setLayoutData；

 

5、gxt里面尽量用boederlayout布局，那样自适应较强；

 

6、所有远程对象继承下面类，可以和spring集成；

 1 public   abstract   class  BaseAction  extends  RemoteServiceServlet  implements
 2         Controller, ServletContextAware, ServletConfigAware, BeanNameAware  {
 3    private ServletContext servletContext;
 4    private String controllerName;
 5
 6    /** *//** * Gets ServletContext. */
 7    @Override
 8    public ServletContext getServletContext() {
 9        return servletContext;
10    }
11
12    /**//* 
13     * * (non-Javadoc) * * @see *
14     * org.springframework.beans.factory.BeanNameAware#setBeanName (java.lang *
15     * .String)
16     */
17    @Override
18    public void setBeanName(String controllerName) {
19        this.controllerName = controllerName;
20    }
21
22    /** *//** * Implementation of ServletContextAware. */
23    public void setServletContext(ServletContext servletContext) {
24        this.servletContext = servletContext;
25    }
26
27    public String getServletName() {
28        return "DispatcherServlet name is "
29                + this.servletConfig.getServletName()
30                + ", GwtController name is:" + controllerName;
31    }
32
33    private ServletConfig servletConfig;
34
35    @Override
36    public void setServletConfig(ServletConfig servletConfig) {
37        this.servletConfig = servletConfig;
38    }
39
40    /** *//**
41     * * Handles request and delegates to GWT's *
42     * RemoteServiceServlet.doPost(request, response).
43     * */
44    public ModelAndView handleRequest(HttpServletRequest request,
45            HttpServletResponse response) throws Exception {
46        try {
47            doPost(request, response);
48            return null;
49        } catch (Exception e) {
50            return null;
51        }
52    }
53
54}

7、servlet里面推数据至gxt前台：
后台：
    

1 RemoteEventServiceServlet ress  =   new  RemoteEventServiceServlet ()  { } ; 
2 UploadEvent event  =   new  UploadEvent (source);
3  ress.addEvent (UploadEvent.FILEREADING_SERVER_DOMAIN_MESSAGE, event); 
4

 RemoteEventServiceServlet ress = new RemoteEventServiceServlet () { }; UploadEvent event = new UploadEvent (source); ress.addEvent (UploadEvent.FILEREADING_SERVER_DOMAIN_MESSAGE, event);
前台：
 // 启动监听器

 1 RemoteEventService theRemoteEventService  =  RemoteEventServiceFactory.getInstance ().getRemoteEventService (); 
 2     theRemoteEventService.addListener (UploadEvent.UPLOAD_SERVER_DOMAIN_INBOUND, 
 3              new  RemoteEventListener () 
 4      { 
 5        public void apply (de.novanic.eventservice.client.event.Event anEvent)
 6        { 
 7            if (anEvent instanceof UploadEvent) 
 8            { 
 9                UploadEvent te = (UploadEvent) anEvent; 
10                sourceTemplate = te.getSource ();
11                fileText.setValue (te.getResultMessage ());
12                } 
13            } 
14    } );