I18N


1   /*
2    * Copyright 2007 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.i18n.client;
17  
18  import com.google.gwt.core.client.EntryPoint;
19  import com.google.gwt.core.client.GWT;
20  import com.google.gwt.i18n.client.Dictionary;
21  import com.google.gwt.user.client.DOM;
22  import com.google.gwt.user.client.Element;
23  import com.google.gwt.user.client.ui.FlexTable;
24  import com.google.gwt.user.client.ui.ListBox;
25  import com.google.gwt.user.client.ui.RootPanel;
26  import com.google.gwt.user.client.ui.TextBox;
27  import com.google.gwt.user.client.ui.Widget;
28  
29  import java.util.Iterator  ;
30  import java.util.NoSuchElementException  ;
31  
32  /**
33   * A sample module that demonstrates how to localize text resources.
34   */
35  public class I18N implements EntryPoint {
36  
37    /**
38     * Attaches logical controllers to various elements on the page. Note that
39     * this module is logic only; it assumes the HTML handles all layout and
40     * styling.
41     * 
42     * @see com.google.gwt.core.client.EntryPoint#onModuleLoad()
43     */
44    public void onModuleLoad() {
45      // An example that demonstrates NumberFormat.
46      NumberFormatExampleConstants numberFormatConstants = (NumberFormatExampleConstants) GWT.create(NumberFormatExampleConstants.class);
47      NumberFormatExampleController numberFormatController = new NumberFormatExampleController(
48          numberFormatConstants);
49      initNumberFormatExample(numberFormatController);
50  
51      // An example that demonstrates DateTimeFormat.
52      DateTimeFormatExampleConstants dateTimeFormatConstants = (DateTimeFormatExampleConstants) GWT.create(DateTimeFormatExampleConstants.class);
53      DateTimeFormatExampleController dateTimeFormatController = new DateTimeFormatExampleController(
54          dateTimeFormatConstants);
55      initDateTimeFormatExample(dateTimeFormatController);
56  
57      // An example that demonstrates Constants.
58      initConstantsExample();
59  
60      // An example that demonstrates ConstantsWithLookup.
61      ConstantsWithLookupExampleConstants constantsWithLookupConstants = (ConstantsWithLookupExampleConstants) GWT.create(ConstantsWithLookupExampleConstants.class);
62      ConstantsWithLookupExampleController constantsWithLookupController = new ConstantsWithLookupExampleController(
63          constantsWithLookupConstants);
64      initConstantsWithLookupExample(constantsWithLookupController);
65  
66      // An example that demonstrates Messages.
67      MessagesExampleConstants messagesExampleConstants = (MessagesExampleConstants) GWT.create(MessagesExampleConstants.class);
68      MessagesExampleController messagesController = new MessagesExampleController(
69          messagesExampleConstants);
70      initMessagesExample(messagesController);
71  
72      // An example that demonstrates Dictionary.
73      initDictionaryExample();
74  
75      TextBox initiallyFocusedTextBox = numberFormatController.txtInput;
76      initiallyFocusedTextBox.setFocus(true);
77      initiallyFocusedTextBox.selectAll();
78    }
79  
80    private void bindElement(String   id, String   text) {
81      Element elem = DOM.getElementById(id);
82      if (elem == null) {
83        throw new NoSuchElementException  (id);
84      }
85      DOM.setInnerText(elem, text);
86    }
87  
88    private void bindElement(String   id, Widget widget) {
89      RootPanel rp = RootPanel.get(id);
90      if (rp == null) {
91        throw new NoSuchElementException  (id);
92      }
93      rp.clear();
94      rp.add(widget);
95    }
96  
97    private void initConstantsExample() {
98      ConstantsExampleConstants constants = (ConstantsExampleConstants) GWT.create(ConstantsExampleConstants.class);
99      ListBox colorChoices = new ListBox();
100 
101     for (Iterator   iter = constants.colorMap().values().iterator(); iter.hasNext();) {
102       String   color = (String  ) iter.next();
103       colorChoices.addItem(color);
104     }
105 
106     TextBox txtFirstName = new TextBox();
107     TextBox txtLastName = new TextBox();
108 
109     bindElement("constantsFirstNameCaption", constants.firstName());
110     bindElement("constantsFirstNameText", txtFirstName);
111     bindElement("constantsLastNameCaption", constants.lastName());
112     bindElement("constantsLastNameText", txtLastName);
113     bindElement("constantsFavoriteColorCaption", constants.favoriteColor());
114     bindElement("constantsFavoriteColorList", colorChoices);
115 
116     txtFirstName.setText("Amelie");
117     txtLastName.setText("Crutcher");
118   }
119 
120   private void initConstantsWithLookupExample(
121       ConstantsWithLookupExampleController controller) {
122     ConstantsWithLookupExampleConstants constants = controller.getConstants();
123     bindElement("constantsWithLookupInputCaption", constants.input());
124     bindElement("constantsWithLookupInputText", controller.txtInput);
125     bindElement("constantsWithLookupResultsCaption", constants.result());
126     bindElement("constantsWithLookupResultsText", controller.txtResult);
127   }
128 
129   private void initDateTimeFormatExample(
130       DateTimeFormatExampleController controller) {
131     DateTimeFormatExampleConstants constants = controller.getConstants();
132     bindElement("dateTimeFormatPatternCaption", constants.pattern());
133     bindElement("dateTimeFormatPatternList", controller.lstSamplePatterns);
134     bindElement("dateTimeFormatPatternText", controller.txtCurrentPattern);
135     bindElement("dateTimeFormatPatternError", controller.lblPatternError);
136     bindElement("dateTimeFormatInputCaption", constants.inputValue());
137     bindElement("dateTimeFormatInputText", controller.txtInput);
138     bindElement("dateTimeFormatInputError", controller.lblParseError);
139     bindElement("dateTimeFormatOutputCaption", constants.formattedOutput());
140     bindElement("dateTimeFormatOutputText", controller.lblFormattedOutput);
141   }
142 
143   private void initDictionaryExample() {
144     FlexTable t = new FlexTable();
145     t.setStyleName("i18n-dictionary");
146     bindElement("dictionaryExample", t);
147 
148     Dictionary userInfo = Dictionary.getDictionary("userInfo");
149     Iterator   s = userInfo.keySet().iterator();
150     for (int i = 0; s.hasNext(); i++) {
151       String   key = (String  ) s.next();
152       t.setText(0, i, key);
153       t.setText(1, i, userInfo.get(key));
154     }
155     t.getRowFormatter().setStyleName(0, "i18n-dictionary-header-row");
156   }
157 
158   private void initMessagesExample(MessagesExampleController controller) {
159     MessagesExampleConstants constants = controller.getConstants();
160     bindElement("messagesTemplateCaption", constants.messageTemplate());
161     bindElement("messagesTemplateText", controller.lblMessageTemplate);
162     bindElement("messagesArg1Caption", constants.arg1());
163     bindElement("messagesArg1Text", controller.txtArg1);
164     bindElement("messagesArg2Caption", constants.arg2());
165     bindElement("messagesArg2Text", controller.txtArg2);
166     bindElement("messagesArg3Caption", constants.arg3());
167     bindElement("messagesArg3Text", controller.txtArg3);
168     bindElement("messagesFormattedOutputCaption", constants.formattedMessage());
169     bindElement("messagesFormattedOutputText", controller.lblFormattedMessage);
170   }
171 
172   private void initNumberFormatExample(NumberFormatExampleController controller) {
173     NumberFormatExampleConstants constants = controller.getConstants();
174     bindElement("numberFormatPatternCaption", constants.pattern());
175     bindElement("numberFormatPatternList", controller.lstSamplePatterns);
176     bindElement("numberFormatPatternText", controller.txtCurrentPattern);
177     bindElement("numberFormatPatternError", controller.lblPatternError);
178     bindElement("numberFormatInputCaption", constants.inputValue());
179     bindElement("numberFormatInputText", controller.txtInput);
180     bindElement("numberFormatInputError", controller.lblParseError);
181     bindElement("numberFormatOutputCaption", constants.formattedOutput());
182     bindElement("numberFormatOutputText", controller.lblFormattedOutput);
183   }
184 }
185
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