?? mailboxes.java
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/* * Copyright 2006 Google Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); you may not * use this file except in compliance with the License. You may obtain a copy of * the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations under * the License. */package com.google.gwt.sample.mail.client;import com.google.gwt.user.client.ui.Composite;import com.google.gwt.user.client.ui.Tree;import com.google.gwt.user.client.ui.TreeItem;/** * A tree displaying a set of email folders. */public class Mailboxes extends Composite { private Tree tree = new Tree(); public Mailboxes() { TreeItem root = new TreeItem(imageItemHTML("home.gif", "foo@example.com")); tree.addItem(root); addImageItem(root, "Inbox"); addImageItem(root, "Drafts"); addImageItem(root, "Templates"); addImageItem(root, "Sent"); addImageItem(root, "Trash"); root.setState(true); initWidget(tree); } /** * A helper method to simplify adding tree items that have attached images. * {@link #addImageItem(TreeItem, String) code} * * @param root the tree item to which the new item will be added. * @param title the text associated with this item. */ private TreeItem addImageItem(TreeItem root, String title) { TreeItem item = new TreeItem(imageItemHTML(title + ".gif", title)); root.addItem(item); return item; } /** * Generates HTML for a tree item with an attached icon. * * @param imageUrl the url of the icon image * @param title the title of the item * @return the resultant HTML */ private String imageItemHTML(String imageUrl, String title) { return "<span><img style='margin-right:4px' src='" + imageUrl.toLowerCase() + "'>" + title + "</span>"; }}
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