| /* |
| * Copyright 2007 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.kitchensink.client; |
| |
| import com.google.gwt.user.client.ui.AbstractImagePrototype; |
| import com.google.gwt.user.client.ui.Composite; |
| import com.google.gwt.user.client.ui.ImageBundle; |
| import com.google.gwt.user.client.ui.TreeImages; |
| |
| /** |
| * A 'sink' is a single panel of the kitchen sink. They are meant to be lazily |
| * instantiated so that the application doesn't pay for all of them on startup. |
| */ |
| public abstract class Sink extends Composite { |
| |
| /** |
| * An image provider to make available images to Sinks. |
| */ |
| public interface Images extends ImageBundle, TreeImages { |
| AbstractImagePrototype gwtLogo(); |
| } |
| |
| /** |
| * Encapsulated information about a sink. Each sink is expected to have a |
| * static <code>init()</code> method that will be called by the kitchen sink |
| * on startup. |
| */ |
| public abstract static class SinkInfo { |
| private Sink instance; |
| private String name, description; |
| |
| public SinkInfo(String name, String desc) { |
| this.name = name; |
| description = desc; |
| } |
| |
| public abstract Sink createInstance(); |
| |
| public String getColor() { |
| return "#2a8ebf"; |
| } |
| |
| public String getDescription() { |
| return description; |
| } |
| |
| public final Sink getInstance() { |
| if (instance != null) { |
| return instance; |
| } |
| return (instance = createInstance()); |
| } |
| |
| public String getName() { |
| return name; |
| } |
| } |
| |
| /** |
| * Called just before this sink is hidden. |
| */ |
| public void onHide() { |
| } |
| |
| /** |
| * Called just after this sink is shown. |
| */ |
| public void onShow() { |
| } |
| } |