?? toppanel.java
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// Copyright 2006 Google Inc. All Rights Reserved.package com.google.gwt.sample.mail.client;import com.google.gwt.user.client.Window;import com.google.gwt.user.client.ui.ClickListener;import com.google.gwt.user.client.ui.Composite;import com.google.gwt.user.client.ui.HTML;import com.google.gwt.user.client.ui.HorizontalPanel;import com.google.gwt.user.client.ui.VerticalPanel;import com.google.gwt.user.client.ui.Widget;/** * The top panel, which contains the 'welcome' message and various links. */public class TopPanel extends Composite implements ClickListener { private HTML signOutLink = new HTML("<a href='javascript:;'>Sign Out</a>"); private HTML aboutLink = new HTML("<a href='javascript:;'>About</a>"); public TopPanel() { HorizontalPanel outer = new HorizontalPanel(); VerticalPanel inner = new VerticalPanel(); outer.setHorizontalAlignment(HorizontalPanel.ALIGN_RIGHT); inner.setHorizontalAlignment(HorizontalPanel.ALIGN_RIGHT); HorizontalPanel links = new HorizontalPanel(); links.setSpacing(4); links.add(signOutLink); links.add(aboutLink); outer.add(inner); inner.add(new HTML("<b>Welcome back, foo@example.com</b>")); inner.add(links); signOutLink.addClickListener(this); aboutLink.addClickListener(this); setWidget(outer); inner.setStyleName("mail-TopPanel"); links.setStyleName("mail-TopPanelLinks"); } public void onClick(Widget sender) { if (sender == signOutLink) { Window.alert("If this were implemented, you would be signed out now."); } else if (sender == aboutLink) { // When the 'About' item is selected, show the AboutDialog. // Note that showing a dialog box does not block -- execution continues // normally, and the dialog fires an event when it is closed. AboutDialog dlg = new AboutDialog(); // Position it roughly in the middle of the screen. int left = (Window.getClientWidth() - 512) / 2; int top = (Window.getClientHeight() - 256) / 2; dlg.setPopupPosition(left, top); dlg.show(); } }}
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