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annotate org.eclipse.jface.examples.databinding/src/org/eclipse/jface/examples/databinding/snippets/Snippet031JFaceObservable.d @ 100:e884642ad36e

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more work on examples
author Frank Benoit <benoit@tionex.de>
date Thu, 23 Apr 2009 00:02:38 +0200
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1 /*******************************************************************************
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2 * Copyright (c) 2008 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 ******************************************************************************/
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11
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12 module org.eclipse.jface.examples.databinding.snippets.Snippet031JFaceObservable;
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13
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14 import java.lang.all;
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16 import org.eclipse.core.commands.common.EventManager;
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17 import org.eclipse.core.databinding.DataBindingContext;
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18 import org.eclipse.core.databinding.observable.Realm;
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19 import org.eclipse.core.databinding.property.value.IValueProperty;
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20 import org.eclipse.jface.databinding.swt.SWTObservables;
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21 import org.eclipse.jface.databinding.util.JFaceProperties;
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22 import org.eclipse.jface.util.IPropertyChangeListener;
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23 import org.eclipse.jface.util.PropertyChangeEvent;
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24 import org.eclipse.swt.SWT;
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25 import org.eclipse.swt.layout.RowLayout;
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26 import org.eclipse.swt.widgets.Display;
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27 import org.eclipse.swt.widgets.Label;
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28 import org.eclipse.swt.widgets.Shell;
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29 import org.eclipse.swt.widgets.Text;
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30
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31 public class Snippet031JFaceObservable {
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32
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33 public static final String NAME_PROPERTY = "name_property";
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35 public static void main(String[] args) {
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36 Display display = new Display();
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37 final ViewModel viewModel = new ViewModel();
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39 Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() {
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40 public void run() {
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41 final Shell shell = new View(viewModel).createShell();
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42 // The SWT event loop
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43 Display display = Display.getCurrent();
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44 while (!shell.isDisposed()) {
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45 if (!display.readAndDispatch()) {
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46 display.sleep();
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47 }
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48 }
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49 }
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50 });
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51 // Print the results
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52 System.out.println("person.getName() = "
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53 + viewModel.getPerson().getName());
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54 }
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56 // The data model class. This is normally a persistent class of some sort.
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57 //
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58 // In this example, we extend the EventManager class
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59 // to manage our listeners and we fire a property change
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60 // event when the object state changes.
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61 public static class Person : EventManager {
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62 // A property...
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63 String name = "HelloWorld";
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65 public String getName() {
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66 return name;
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67 }
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69 public void setName(String name) {
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70 fireChange(new PropertyChangeEvent(this, NAME_PROPERTY, this.name,
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71 this.name = name));
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72 }
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74 public void addPropertyChangeListener(IPropertyChangeListener listener) {
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75 addListenerObject(listener);
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76 }
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78 public void removePropertyChangeListener(
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79 IPropertyChangeListener listener) {
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80 removeListenerObject(listener);
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81 }
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83 private void fireChange(PropertyChangeEvent event) {
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84 final Object[] list = getListeners();
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85 for (int i = 0; i < list.length; ++i) {
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86 ((IPropertyChangeListener) list[i]).propertyChange(event);
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87 }
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88 }
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90 }
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92 // The View's model--the root of our Model graph for this particular GUI.
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93 //
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94 // Typically each View class has a corresponding ViewModel class.
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95 // The ViewModel is responsible for getting the objects to edit from the
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96 // DAO. Since this snippet doesn't have any persistent objects to
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97 // retrieve, this ViewModel just instantiates a model object to edit.
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98 static class ViewModel {
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99 // The model to bind
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100 private Person person = new Person();
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102 public Person getPerson() {
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103 return person;
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104 }
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105 }
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107 // The GUI view
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108 static class View {
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109 private ViewModel viewModel;
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110 private Text name;
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112 public View(ViewModel viewModel) {
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113 this.viewModel = viewModel;
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114 }
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116 public Shell createShell() {
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117 // Build a UI
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118 Display display = Display.getDefault();
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119 Shell shell = new Shell(display);
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120 shell.setLayout(new RowLayout(SWT.VERTICAL));
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121 name = new Text(shell, SWT.BORDER);
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123 // Bind it
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124 DataBindingContext bindingContext = new DataBindingContext();
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125 Person person = viewModel.getPerson();
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127 IValueProperty nameProperty = JFaceProperties.value(Person.class,
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128 "name", NAME_PROPERTY);
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130 bindingContext.bindValue(SWTObservables.observeText(name,
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131 SWT.Modify), nameProperty.observe(person), null, null);
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133 Label label = new Label(shell, SWT.NONE);
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134 bindingContext.bindValue(SWTObservables.observeText(label),
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135 nameProperty.observe(person), null, null);
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137 // Open and return the Shell
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138 shell.pack();
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139 shell.open();
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140 return shell;
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141 }
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142 }
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144 }
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145 void main( String[] args ){
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146 Snippet031JFaceObservable.main(args);
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147 }