GWT RootLayoutPanel用法

GWT RootLayoutPanel允许我们选择布局面板的起点。在此面板中, 在创建时或调整窗口大小时都会调用RequiresResize.onResize()方法。

GWT RootLayoutPanel类声明

让我们看看com.google.gwt.user.client.ui.RootLayoutPanel的声明

public class RootLayoutPanel extends LayoutPanel

GWT RootLayoutPanel方法

GWT RootLayoutPanel示例

import com.google.gwt.event.logical.shared.ResizeEvent;
import com.google.gwt.event.logical.shared.ResizeHandler;
import com.google.gwt.user.client.Window;

/* This is the entry point method. */ 

public void onModuleLoad() {

// Attach two child widgets to a LayoutPanel, laying them out horizontally, splitting at 50%. Widget 

childOne = new HTML("left");
Widget childTwo = new HTML("right");
LayoutPanel p = new LayoutPanel();
p.add(childOne);
p.add(childTwo);
p.setWidgetLeftWidth(childOne, 0, Unit.PCT, 50, Unit.PCT);
p.setWidgetRightWidth(childTwo, 0, Unit.PCT, 50, Unit.PCT);

// Attach the LayoutPanel to the RootLayoutPanel
RootLayoutPanel.get().add(p);
 }

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