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comparison org.eclipse.jface.examples.databinding/src/org/eclipse/jface/examples/databinding/snippets/Snippet031JFaceObservable.d @ 90:6086085e153d

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Added databinding snippets. unmodified java sources.
author Frank Benoit <benoit@tionex.de>
date Sun, 19 Apr 2009 11:33:55 +0200
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89:0ca1aee7decf 90:6086085e153d
1 /*******************************************************************************
2 * Copyright (c) 2008 IBM Corporation and others.
3 * All rights reserved. This program and the accompanying materials
4 * are made available under the terms of the Eclipse Public License v1.0
5 * which accompanies this distribution, and is available at
6 * http://www.eclipse.org/legal/epl-v10.html
7 *
8 * Contributors:
9 * IBM Corporation - initial API and implementation
10 ******************************************************************************/
11
12 package org.eclipse.jface.examples.databinding.snippets;
13
14 import org.eclipse.core.commands.common.EventManager;
15 import org.eclipse.core.databinding.DataBindingContext;
16 import org.eclipse.core.databinding.observable.Realm;
17 import org.eclipse.core.databinding.property.value.IValueProperty;
18 import org.eclipse.jface.databinding.swt.SWTObservables;
19 import org.eclipse.jface.databinding.util.JFaceProperties;
20 import org.eclipse.jface.util.IPropertyChangeListener;
21 import org.eclipse.jface.util.PropertyChangeEvent;
22 import org.eclipse.swt.SWT;
23 import org.eclipse.swt.layout.RowLayout;
24 import org.eclipse.swt.widgets.Display;
25 import org.eclipse.swt.widgets.Label;
26 import org.eclipse.swt.widgets.Shell;
27 import org.eclipse.swt.widgets.Text;
28
29 public class Snippet031JFaceObservable {
30
31 public static final String NAME_PROPERTY = "name_property";
32
33 public static void main(String[] args) {
34 Display display = new Display();
35 final ViewModel viewModel = new ViewModel();
36
37 Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() {
38 public void run() {
39 final Shell shell = new View(viewModel).createShell();
40 // The SWT event loop
41 Display display = Display.getCurrent();
42 while (!shell.isDisposed()) {
43 if (!display.readAndDispatch()) {
44 display.sleep();
45 }
46 }
47 }
48 });
49 // Print the results
50 System.out.println("person.getName() = "
51 + viewModel.getPerson().getName());
52 }
53
54 // The data model class. This is normally a persistent class of some sort.
55 //
56 // In this example, we extend the EventManager class
57 // to manage our listeners and we fire a property change
58 // event when the object state changes.
59 public static class Person extends EventManager {
60 // A property...
61 String name = "HelloWorld";
62
63 public String getName() {
64 return name;
65 }
66
67 public void setName(String name) {
68 fireChange(new PropertyChangeEvent(this, NAME_PROPERTY, this.name,
69 this.name = name));
70 }
71
72 public void addPropertyChangeListener(IPropertyChangeListener listener) {
73 addListenerObject(listener);
74 }
75
76 public void removePropertyChangeListener(
77 IPropertyChangeListener listener) {
78 removeListenerObject(listener);
79 }
80
81 private void fireChange(PropertyChangeEvent event) {
82 final Object[] list = getListeners();
83 for (int i = 0; i < list.length; ++i) {
84 ((IPropertyChangeListener) list[i]).propertyChange(event);
85 }
86 }
87
88 }
89
90 // The View's model--the root of our Model graph for this particular GUI.
91 //
92 // Typically each View class has a corresponding ViewModel class.
93 // The ViewModel is responsible for getting the objects to edit from the
94 // DAO. Since this snippet doesn't have any persistent objects to
95 // retrieve, this ViewModel just instantiates a model object to edit.
96 static class ViewModel {
97 // The model to bind
98 private Person person = new Person();
99
100 public Person getPerson() {
101 return person;
102 }
103 }
104
105 // The GUI view
106 static class View {
107 private ViewModel viewModel;
108 private Text name;
109
110 public View(ViewModel viewModel) {
111 this.viewModel = viewModel;
112 }
113
114 public Shell createShell() {
115 // Build a UI
116 Display display = Display.getDefault();
117 Shell shell = new Shell(display);
118 shell.setLayout(new RowLayout(SWT.VERTICAL));
119 name = new Text(shell, SWT.BORDER);
120
121 // Bind it
122 DataBindingContext bindingContext = new DataBindingContext();
123 Person person = viewModel.getPerson();
124
125 IValueProperty nameProperty = JFaceProperties.value(Person.class,
126 "name", NAME_PROPERTY);
127
128 bindingContext.bindValue(SWTObservables.observeText(name,
129 SWT.Modify), nameProperty.observe(person), null, null);
130
131 Label label = new Label(shell, SWT.NONE);
132 bindingContext.bindValue(SWTObservables.observeText(label),
133 nameProperty.observe(person), null, null);
134
135 // Open and return the Shell
136 shell.pack();
137 shell.open();
138 return shell;
139 }
140 }
141
142 }