VerticalSplitPanel在GWT中不显示小部件

我刚刚尝试了你的代码(用一个小的调整来修正编译错误),它同时显示了两个小部件。我在GWT 2.0中试过这个。

这是我使用的有效代码。注意构造函数名称的不同。

public class MyView extends Composite
{
    private VerticalSplitPanel mainPanel=new VerticalSplitPanel();

    public MyView()
    {                           

        mainPanel.setSize("100%", "100%");
        mainPanel.setSplitPosition("50%");
        // Add some content
        String randomText = "This is some text to show how the contents on either "
            + "side of the splitter flow.   "
            + "This is some text to show how the contents on either "
            + "side of the splitter flow.   "
            + "This is some text to show how the contents on either "
            + "side of the splitter flow.   ";
        mainPanel.setTopWidget(new HTML(randomText));
        mainPanel.setBottomWidget(new HTML(randomText));
        initWidget(mainPanel);
    }
} 

public void onModuleLoad() {
    RootPanel.get().add(new MyView());
}