gxt的笔记1

liuliang — Thu, 03 May 2012 10:05:00 GMT

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；

1public 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：

1RemoteEventServiceServlet ress = new RemoteEventServiceServlet () { };
2UploadEvent 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

1RemoteEventService 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    });

liuliang 2012-05-03 18:05 发表评论

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gxt的笔记1