我如何用另一个文本替换TabPanel的选项卡。

在下面的代码中,我想替换选项卡一中的text4。

换句话说,当选项卡显示的是一个小部件(例如text1)时,如何更改另一个小部件(例如text4)的内容

    public void onModuleLoad() {
    String text1 = "1111111111111111111111111111 ...";
    String text2 = "2222222222222222222222222222...";
    String text3 = "3333333333333333333333333333...";
    String text4 = "4444444444444444444444444444...";

    TabPanel panel = new TabPanel();

    FlowPanel flowpanel;

    flowpanel = new FlowPanel();
    flowpanel.add(new Label(text1));
    panel.add(flowpanel, "One");

    flowpanel = new FlowPanel();
    flowpanel.add(new Label(text2));
    panel.add(flowpanel, "Two");

    flowpanel = new FlowPanel();
    flowpanel.add(new Label(text3));
    panel.add(flowpanel, "Three");

    panel.selectTab(0);

    /* in this line exactlly , How can i raplace text4 in tab(one) */

    panel.setSize("500px", "250px");
    panel.addStyleName("table-center");
    RootPanel.get("demo").add(panel);
}

最佳答案

简单的方法是保留label1并随时更改值

 Label label1 = new Label(text1)
 flowpanel.add(label1);
 ...
 label1.setText(text4);


如果您不这样做,则可以这样:

FlowPanel f =  (FlowPanel) panel.getWidget(0); // first added Widget (flowpanel)
Label l = (Label) f.getWidget(0); // first added widget to panel (label)
l.setText(text4); // change the text

09-04 14:36