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annotate org.eclipse.jface.examples.databinding/src/org/eclipse/jface/examples/databinding/snippets/Snippet015DelayTextModifyEvents.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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1 /************************************************************************************************************
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2 * Copyright (c) 2007 Matthew Hall and others. All rights reserved. This program and the
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3 * accompanying materials are made available under the terms of the Eclipse Public License v1.0 which
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4 * accompanies this distribution, and is available at http://www.eclipse.org/legal/epl-v10.html
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5 *
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6 * Contributors:
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7 * Matthew Hall - initial API and implementation (bug 180746)
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8 * Boris Bokowski, IBM - initial API and implementation
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9 * Matthew Hall - bugs 260329, 264286
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10 ***********************************************************************************************************/
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11 package org.eclipse.jface.examples.databinding.snippets;
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12
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13 import org.eclipse.core.databinding.DataBindingContext;
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14 import org.eclipse.core.databinding.observable.Observables;
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15 import org.eclipse.core.databinding.observable.Realm;
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16 import org.eclipse.core.databinding.observable.value.IObservableValue;
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17 import org.eclipse.jface.databinding.swt.ISWTObservableValue;
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18 import org.eclipse.jface.databinding.swt.SWTObservables;
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19 import org.eclipse.jface.databinding.swt.WidgetProperties;
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20 import org.eclipse.jface.internal.databinding.provisional.swt.ControlUpdater;
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21 import org.eclipse.jface.layout.GridDataFactory;
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22 import org.eclipse.jface.resource.FontDescriptor;
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23 import org.eclipse.jface.resource.JFaceResources;
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24 import org.eclipse.jface.resource.LocalResourceManager;
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25 import org.eclipse.jface.resource.ResourceManager;
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26 import org.eclipse.swt.SWT;
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27 import org.eclipse.swt.graphics.Font;
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28 import org.eclipse.swt.layout.GridLayout;
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29 import org.eclipse.swt.widgets.Composite;
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30 import org.eclipse.swt.widgets.Display;
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31 import org.eclipse.swt.widgets.Label;
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32 import org.eclipse.swt.widgets.Shell;
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33 import org.eclipse.swt.widgets.Text;
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34
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35 public class Snippet015DelayTextModifyEvents {
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36
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37 private static void createControls(Shell shell) {
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38 final Label field1 = createLabel(shell, SWT.NONE, "Field 1 ");
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39
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40 Text text1 = new Text(shell, SWT.BORDER);
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41 GridDataFactory.fillDefaults().grab(true, false).hint(200, SWT.DEFAULT)
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42 .applyTo(text1);
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43 createLabel(shell, SWT.NONE, "200ms delay");
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44
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45 final Label field2 = createLabel(shell, SWT.NONE, "Field 2 ");
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46
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47 Text text2 = new Text(shell, SWT.BORDER);
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48 GridDataFactory.fillDefaults().grab(true, false).hint(200, SWT.DEFAULT)
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49 .applyTo(text2);
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50
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51 createLabel(shell, SWT.NONE, "1000ms delay");
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52
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53 final ISWTObservableValue delayed1 = WidgetProperties.text(SWT.Modify)
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54 .observeDelayed(200, text1);
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55 final ISWTObservableValue delayed2 = WidgetProperties.text(SWT.Modify)
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56 .observeDelayed(1000, text2);
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57
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58 // (In a real application,you would want to dispose the resource manager
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59 // when you are done with it)
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60 ResourceManager resourceManager = new LocalResourceManager(
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61 JFaceResources.getResources());
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62 final Font shellFont = shell.getFont();
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63 final Font italicFont = resourceManager.createFont(FontDescriptor
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64 .createFrom(shellFont).setStyle(SWT.ITALIC));
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65
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66 final IObservableValue stale1 = Observables.observeStale(delayed1);
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67 new ControlUpdater(field2) {
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68 protected void updateControl() {
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69 boolean stale = ((Boolean) stale1.getValue()).booleanValue();
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70 field2.setFont(stale ? italicFont : shellFont);
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71 }
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72 };
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73
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74 final IObservableValue stale2 = Observables.observeStale(delayed2);
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75 new ControlUpdater(field1) {
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76 protected void updateControl() {
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77 boolean stale = ((Boolean) stale2.getValue()).booleanValue();
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78 field1.setFont(stale ? italicFont : shellFont);
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79 }
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80 };
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81
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82 String info = "Pending changes are applied immediately if the observed control loses focus";
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83 GridDataFactory.fillDefaults().span(3, 1).applyTo(
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84 createLabel(shell, SWT.WRAP, info));
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85
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86 DataBindingContext dbc = new DataBindingContext();
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87
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88 dbc.bindValue(delayed1, delayed2);
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89 }
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90
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91 private static Label createLabel(Composite parent, int style, String text) {
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92 Label label = new Label(parent, style);
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93 label.setText(text);
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94 return label;
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95 }
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96
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97 public static void main(String[] args) {
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98 final Display display = new Display();
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99
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100 Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() {
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101 public void run() {
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102 Shell shell = new Shell();
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103 shell.setLayout(new GridLayout(3, false));
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104
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105 createControls(shell);
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106
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107 shell.pack();
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108 shell.open();
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109 while (!shell.isDisposed())
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110 if (!display.readAndDispatch())
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111 display.sleep();
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112 }
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113
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114 });
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115
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116 display.dispose();
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117 }
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118
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119 }