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annotate org.eclipse.jface.examples.databinding/src/org/eclipse/jface/examples/databinding/snippets/Snippet012CompositeUpdater.d @ 99:5d5bd660917f

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build some databind snippets
author Frank Benoit <benoit@tionex.de>
date Wed, 22 Apr 2009 18:59:26 +0200
parents 6086085e153d
children e884642ad36e
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1 /*******************************************************************************
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2 * Copyright (c) 2007 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.Snippet012CompositeUpdater;
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13
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14 import java.lang.all;
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15
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16 import java.util.Timer;
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17 import java.util.TimerTask;
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18
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19 import org.eclipse.core.databinding.observable.Realm;
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20 import org.eclipse.core.databinding.observable.list.WritableList;
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21 import org.eclipse.core.databinding.observable.value.WritableValue;
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22 import org.eclipse.jface.databinding.swt.SWTObservables;
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23 import org.eclipse.jface.internal.databinding.provisional.swt.CompositeUpdater;
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24 import org.eclipse.jface.layout.GridDataFactory;
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25 import org.eclipse.jface.layout.GridLayoutFactory;
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26 import org.eclipse.swt.SWT;
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27 import org.eclipse.swt.events.SelectionAdapter;
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28 import org.eclipse.swt.widgets.Button;
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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.Widget;
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34
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35 /**
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36 * @since 3.2
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37 *
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38 */
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39 public class Snippet012CompositeUpdater {
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41 public static void main(String[] args) {
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42 final Display display = new Display();
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43 Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() {
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44 public void run() {
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45 Shell shell = new Shell(display);
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46
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47 final WritableList list = new WritableList();
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49 Button button = new Button(shell, SWT.PUSH);
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50 button.setText("add");
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51 button.addSelectionListener(new SelectionAdapter() {
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52 public void widgetSelected(
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53 org.eclipse.swt.events.SelectionEvent e) {
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54 list.add(0, new Counter());
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55 }
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56 });
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58 final Composite composite = new Composite(shell, SWT.None);
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60 new CompositeUpdater(composite, list) {
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61 protected Widget createWidget(int index) {
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62 Label label = new Label(composite, SWT.BORDER);
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63 //requestLayout(label);
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64 return label;
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65 }
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67 protected void updateWidget(Widget widget, Object element) {
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68 ((Label) widget).setText(((Counter) element).getValue()
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69 + "");
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70 requestLayout((Label)widget);
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71 }
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72 };
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73 GridLayoutFactory.fillDefaults().numColumns(10).generateLayout(composite);
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75 GridDataFactory.fillDefaults().grab(true, true).applyTo(
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76 composite);
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78 GridLayoutFactory.fillDefaults().generateLayout(shell);
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79 shell.pack();
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80 shell.open();
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81 while (!shell.isDisposed()) {
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82 if (!display.readAndDispatch())
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83 display.sleep();
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84 }
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85 }
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86 });
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87 display.dispose();
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88 }
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90 static Timer timer = new Timer(true);
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91
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92 static class Counter extends WritableValue {
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93 Counter() {
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94 super(new Integer(0), Integer.class);
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95 scheduleIncrementTask();
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96 }
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98 private void scheduleIncrementTask() {
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99 timer.schedule(new TimerTask() {
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100 public void run() {
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101 // we have to get onto the realm (UI thread) to perform the
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102 // increment
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103 getRealm().asyncExec(new Runnable() {
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104 public void run() {
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105 Integer currentVal = (Integer) getValue();
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106 setValue(new Integer(currentVal.intValue() + 1));
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107 }
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108 });
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109 scheduleIncrementTask();
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110 }
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111 }, 1000);
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112 }
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113 }
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114 }
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115 void main( String[] args ){
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116 Snippet012CompositeUpdater.main(args);
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117 }