1 /*
2  * Copyright 2008 Google Inc.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not
5  * use this file except in compliance with the License. You may obtain a copy of
6  * the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13  * License for the specific language governing permissions and limitations under
14  * the License.
15  */
16 package com.google.gwt.sample.showcase.client.content.widgets;
17 
18 import com.google.gwt.core.client.GWT;
19 import com.google.gwt.core.client.RunAsyncCallback;
20 import com.google.gwt.i18n.client.Constants;
21 import com.google.gwt.sample.showcase.client.ContentWidget;
22 import com.google.gwt.sample.showcase.client.Showcase;
23 import com.google.gwt.sample.showcase.client.ShowcaseAnnotations.ShowcaseData;
24 import com.google.gwt.sample.showcase.client.ShowcaseAnnotations.ShowcaseSource;
25 import com.google.gwt.sample.showcase.client.ShowcaseAnnotations.ShowcaseStyle;
26 import com.google.gwt.sample.showcase.client.ShowcaseConstants;
27 import com.google.gwt.user.client.rpc.AsyncCallback;
28 import com.google.gwt.user.client.ui.HTML;
29 import com.google.gwt.user.client.ui.Hyperlink;
30 import com.google.gwt.user.client.ui.VerticalPanel;
31 import com.google.gwt.user.client.ui.Widget;
32 
33 /**
34  * Example file.
35  */
36 @ShowcaseStyle(".gwt-Hyperlink")
37 public class CwHyperlink extends ContentWidget {
38   /**
39    * The constants used in this Content Widget.
40    */
41   @ShowcaseSource
42   public static interface CwConstants extends Constants {
cwHyperlinkChoose()43     String cwHyperlinkChoose();
44 
cwHyperlinkDescription()45     String cwHyperlinkDescription();
46 
cwHyperlinkName()47     String cwHyperlinkName();
48   }
49 
50   /**
51    * An instance of the constants.
52    */
53   @ShowcaseData
54   private final CwConstants constants;
55 
56   /**
57    * Constructor.
58    *
59    * @param constants the constants
60    */
CwHyperlink(CwConstants constants)61   public CwHyperlink(CwConstants constants) {
62     super(
63         constants.cwHyperlinkName(), constants.cwHyperlinkDescription(), true);
64     this.constants = constants;
65   }
66 
67   /**
68    * Initialize this example.
69    */
70   @ShowcaseSource
71   @Override
onInitialize()72   public Widget onInitialize() {
73     // Add a label
74     VerticalPanel vPanel = new VerticalPanel();
75     vPanel.add(new HTML(constants.cwHyperlinkChoose()));
76     vPanel.setSpacing(5);
77 
78     // Add a hyper link to each section in the Widgets category
79     ShowcaseConstants allConstants = (ShowcaseConstants) constants;
80     vPanel.add(getHyperlink(CwCheckBox.class, allConstants.cwCheckBoxName()));
81     vPanel.add(
82         getHyperlink(CwRadioButton.class, allConstants.cwRadioButtonName()));
83     vPanel.add(
84         getHyperlink(CwBasicButton.class, allConstants.cwBasicButtonName()));
85     vPanel.add(
86         getHyperlink(CwCustomButton.class, allConstants.cwCustomButtonName()));
87     vPanel.add(
88         getHyperlink(CwFileUpload.class, allConstants.cwFileUploadName()));
89     vPanel.add(
90         getHyperlink(CwDatePicker.class, allConstants.cwDatePickerName()));
91 
92     // Return the panel
93     return vPanel;
94   }
95 
96   @Override
asyncOnInitialize(final AsyncCallback<Widget> callback)97   protected void asyncOnInitialize(final AsyncCallback<Widget> callback) {
98     GWT.runAsync(CwHyperlink.class, new RunAsyncCallback() {
99 
100       public void onFailure(Throwable caught) {
101         callback.onFailure(caught);
102       }
103 
104       public void onSuccess() {
105         callback.onSuccess(onInitialize());
106       }
107     });
108   }
109 
110   /**
111    * Get a {@link Hyperlink} to a section based on the name of the
112    * {@link ContentWidget} example.
113    *
114    * @param cwClass the {@link ContentWidget} class
115    * @param name the name to display for the link
116    * @return a {@link Hyperlink}
117    */
118   @ShowcaseSource
getHyperlink( Class<C> cwClass, String name)119   private <C extends ContentWidget> Hyperlink getHyperlink(
120       Class<C> cwClass, String name) {
121     Hyperlink link = new Hyperlink(
122         name, Showcase.getContentWidgetToken(cwClass));
123     link.ensureDebugId("cwHyperlink-" + cwClass.getName());
124     return link;
125   }
126 }
127