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comparison org.eclipse.jface.examples.databinding/src/org/eclipse/jface/examples/databinding/snippets/Snippet022ComputedListCombo.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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children 5d5bd660917f
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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 java.util.ArrayList;
15 import java.util.Iterator;
16 import java.util.List;
17
18 import org.eclipse.core.databinding.observable.Realm;
19 import org.eclipse.core.databinding.observable.list.ComputedList;
20 import org.eclipse.core.databinding.observable.list.IObservableList;
21 import org.eclipse.core.databinding.observable.list.WritableList;
22 import org.eclipse.core.databinding.observable.value.IObservableValue;
23 import org.eclipse.jface.databinding.swt.SWTObservables;
24 import org.eclipse.jface.databinding.viewers.ObservableListContentProvider;
25 import org.eclipse.jface.layout.GridDataFactory;
26 import org.eclipse.jface.layout.GridLayoutFactory;
27 import org.eclipse.jface.viewers.ComboViewer;
28 import org.eclipse.swt.SWT;
29 import org.eclipse.swt.layout.GridLayout;
30 import org.eclipse.swt.widgets.Button;
31 import org.eclipse.swt.widgets.Combo;
32 import org.eclipse.swt.widgets.Composite;
33 import org.eclipse.swt.widgets.Display;
34 import org.eclipse.swt.widgets.Group;
35 import org.eclipse.swt.widgets.Shell;
36
37 /**
38 * @since 3.2
39 *
40 */
41 public class Snippet022ComputedListCombo {
42 private static WritableList model;
43
44 public static void main(String[] args) {
45 Display display = new Display();
46 final Shell shell = new Shell(display);
47 shell.setLayout(new GridLayout(1, false));
48
49 Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() {
50 public void run() {
51 Snippet022ComputedListCombo snippet = new Snippet022ComputedListCombo();
52 snippet.createModel();
53 snippet.createControls(shell);
54 }
55 });
56
57 shell.pack();
58 shell.open();
59 while (!shell.isDisposed()) {
60 if (!display.readAndDispatch())
61 display.sleep();
62 }
63 display.dispose();
64 }
65
66 /**
67 *
68 */
69 protected void createModel() {
70 model = new WritableList();
71 model.add(new Thing("Alice", true, false));
72 model.add(new Thing("Beth", true, false));
73 model.add(new Thing("Cathy", true, false));
74 model.add(new Thing("Arthur", false, true));
75 model.add(new Thing("Bob", false, true));
76 model.add(new Thing("Curtis", false, true));
77 model.add(new Thing("Snail", true, true));
78 model.add(new Thing("Nail", false, false));
79 }
80
81 /**
82 * @param shell
83 */
84 protected void createControls(Shell shell) {
85 Composite composite = new Composite(shell, SWT.NONE);
86 Group group = new Group(composite, SWT.NONE);
87 group.setText("Filter");
88 Button male = new Button(group, SWT.CHECK);
89 male.setText("Male");
90 Button female = new Button(group, SWT.CHECK);
91 female.setText("Female");
92 final IObservableValue femaleObservable = SWTObservables
93 .observeSelection(female);
94 final IObservableValue maleObservable = SWTObservables
95 .observeSelection(male);
96 Combo combo = new Combo(composite, SWT.DROP_DOWN | SWT.READ_ONLY);
97 GridDataFactory.defaultsFor(combo).align(SWT.BEGINNING, SWT.BEGINNING)
98 .applyTo(combo);
99 ComboViewer viewer = new ComboViewer(combo);
100 viewer.setContentProvider(new ObservableListContentProvider());
101 // We should really have an out-of-the box filtered list...
102 IObservableList filteredList = new ComputedList() {
103 protected List calculate() {
104 ArrayList result = new ArrayList();
105 for (Iterator it = model.iterator(); it.hasNext();) {
106 Thing thing = (Thing) it.next();
107 if (((Boolean) femaleObservable.getValue()).booleanValue()
108 && !thing.female)
109 continue;
110 if (((Boolean) maleObservable.getValue()).booleanValue()
111 && !thing.male)
112 continue;
113 result.add(thing);
114 }
115 return result;
116 }
117 };
118 viewer.setInput(filteredList);
119 GridLayoutFactory.swtDefaults().applyTo(group);
120 GridLayoutFactory.swtDefaults().applyTo(composite);
121 }
122
123 static class Thing {
124 String name;
125 boolean male;
126 boolean female;
127
128 public Thing(String name, boolean female, boolean male) {
129 this.name = name;
130 this.female = female;
131 this.male = male;
132 }
133
134 public String toString() {
135 return name;
136 }
137 }
138 }