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annotate 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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6086085e153d Added databinding snippets. unmodified java sources.
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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 package org.eclipse.jface.examples.databinding.snippets;
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13
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14 import java.util.ArrayList;
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15 import java.util.Iterator;
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16 import java.util.List;
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17
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18 import org.eclipse.core.databinding.observable.Realm;
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19 import org.eclipse.core.databinding.observable.list.ComputedList;
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20 import org.eclipse.core.databinding.observable.list.IObservableList;
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21 import org.eclipse.core.databinding.observable.list.WritableList;
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22 import org.eclipse.core.databinding.observable.value.IObservableValue;
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23 import org.eclipse.jface.databinding.swt.SWTObservables;
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24 import org.eclipse.jface.databinding.viewers.ObservableListContentProvider;
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25 import org.eclipse.jface.layout.GridDataFactory;
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26 import org.eclipse.jface.layout.GridLayoutFactory;
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27 import org.eclipse.jface.viewers.ComboViewer;
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28 import org.eclipse.swt.SWT;
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29 import org.eclipse.swt.layout.GridLayout;
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30 import org.eclipse.swt.widgets.Button;
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31 import org.eclipse.swt.widgets.Combo;
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32 import org.eclipse.swt.widgets.Composite;
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33 import org.eclipse.swt.widgets.Display;
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34 import org.eclipse.swt.widgets.Group;
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35 import org.eclipse.swt.widgets.Shell;
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36
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37 /**
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38 * @since 3.2
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39 *
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40 */
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41 public class Snippet022ComputedListCombo {
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42 private static WritableList model;
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43
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44 public static void main(String[] args) {
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45 Display display = new Display();
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46 final Shell shell = new Shell(display);
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47 shell.setLayout(new GridLayout(1, false));
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48
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49 Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() {
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50 public void run() {
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51 Snippet022ComputedListCombo snippet = new Snippet022ComputedListCombo();
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52 snippet.createModel();
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53 snippet.createControls(shell);
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54 }
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55 });
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56
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57 shell.pack();
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58 shell.open();
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59 while (!shell.isDisposed()) {
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60 if (!display.readAndDispatch())
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61 display.sleep();
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62 }
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63 display.dispose();
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64 }
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65
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66 /**
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67 *
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68 */
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69 protected void createModel() {
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70 model = new WritableList();
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71 model.add(new Thing("Alice", true, false));
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72 model.add(new Thing("Beth", true, false));
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73 model.add(new Thing("Cathy", true, false));
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74 model.add(new Thing("Arthur", false, true));
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75 model.add(new Thing("Bob", false, true));
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76 model.add(new Thing("Curtis", false, true));
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77 model.add(new Thing("Snail", true, true));
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78 model.add(new Thing("Nail", false, false));
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79 }
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80
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81 /**
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82 * @param shell
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83 */
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84 protected void createControls(Shell shell) {
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85 Composite composite = new Composite(shell, SWT.NONE);
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86 Group group = new Group(composite, SWT.NONE);
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87 group.setText("Filter");
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88 Button male = new Button(group, SWT.CHECK);
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89 male.setText("Male");
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90 Button female = new Button(group, SWT.CHECK);
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91 female.setText("Female");
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92 final IObservableValue femaleObservable = SWTObservables
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93 .observeSelection(female);
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94 final IObservableValue maleObservable = SWTObservables
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95 .observeSelection(male);
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96 Combo combo = new Combo(composite, SWT.DROP_DOWN | SWT.READ_ONLY);
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97 GridDataFactory.defaultsFor(combo).align(SWT.BEGINNING, SWT.BEGINNING)
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98 .applyTo(combo);
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99 ComboViewer viewer = new ComboViewer(combo);
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100 viewer.setContentProvider(new ObservableListContentProvider());
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101 // We should really have an out-of-the box filtered list...
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102 IObservableList filteredList = new ComputedList() {
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103 protected List calculate() {
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104 ArrayList result = new ArrayList();
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105 for (Iterator it = model.iterator(); it.hasNext();) {
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106 Thing thing = (Thing) it.next();
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107 if (((Boolean) femaleObservable.getValue()).booleanValue()
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108 && !thing.female)
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109 continue;
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110 if (((Boolean) maleObservable.getValue()).booleanValue()
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111 && !thing.male)
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112 continue;
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113 result.add(thing);
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114 }
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115 return result;
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116 }
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117 };
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118 viewer.setInput(filteredList);
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119 GridLayoutFactory.swtDefaults().applyTo(group);
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120 GridLayoutFactory.swtDefaults().applyTo(composite);
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121 }
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122
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123 static class Thing {
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124 String name;
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125 boolean male;
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126 boolean female;
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127
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128 public Thing(String name, boolean female, boolean male) {
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129 this.name = name;
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130 this.female = female;
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131 this.male = male;
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132 }
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133
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134 public String toString() {
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135 return name;
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136 }
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137 }
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138 }