Mercurial > projects > dwt2

comparison org.eclipse.jface.examples.databinding/src/org/eclipse/jface/examples/databinding/snippets/Snippet012CompositeUpdater.d @ 90:6086085e153d

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Added databinding snippets. unmodified java sources.
author Frank Benoit <benoit@tionex.de>
date Sun, 19 Apr 2009 11:33:55 +0200
parents
children 5d5bd660917f
comparison
equal deleted inserted replaced
89:0ca1aee7decf 90:6086085e153d
1 /*******************************************************************************
2 * Copyright (c) 2007 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.Timer;
15 import java.util.TimerTask;
16
17 import org.eclipse.core.databinding.observable.Realm;
18 import org.eclipse.core.databinding.observable.list.WritableList;
19 import org.eclipse.core.databinding.observable.value.WritableValue;
20 import org.eclipse.jface.databinding.swt.SWTObservables;
21 import org.eclipse.jface.internal.databinding.provisional.swt.CompositeUpdater;
22 import org.eclipse.jface.layout.GridDataFactory;
23 import org.eclipse.jface.layout.GridLayoutFactory;
24 import org.eclipse.swt.SWT;
25 import org.eclipse.swt.events.SelectionAdapter;
26 import org.eclipse.swt.widgets.Button;
27 import org.eclipse.swt.widgets.Composite;
28 import org.eclipse.swt.widgets.Display;
29 import org.eclipse.swt.widgets.Label;
30 import org.eclipse.swt.widgets.Shell;
31 import org.eclipse.swt.widgets.Widget;
32
33 /**
34 * @since 3.2
35 *
36 */
37 public class Snippet012CompositeUpdater {
38
39 public static void main(String[] args) {
40 final Display display = new Display();
41 Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() {
42 public void run() {
43 Shell shell = new Shell(display);
44
45 final WritableList list = new WritableList();
46
47 Button button = new Button(shell, SWT.PUSH);
48 button.setText("add");
49 button.addSelectionListener(new SelectionAdapter() {
50 public void widgetSelected(
51 org.eclipse.swt.events.SelectionEvent e) {
52 list.add(0, new Counter());
53 }
54 });
55
56 final Composite composite = new Composite(shell, SWT.None);
57
58 new CompositeUpdater(composite, list) {
59 protected Widget createWidget(int index) {
60 Label label = new Label(composite, SWT.BORDER);
61 //requestLayout(label);
62 return label;
63 }
64
65 protected void updateWidget(Widget widget, Object element) {
66 ((Label) widget).setText(((Counter) element).getValue()
67 + "");
68 requestLayout((Label)widget);
69 }
70 };
71 GridLayoutFactory.fillDefaults().numColumns(10).generateLayout(composite);
72
73 GridDataFactory.fillDefaults().grab(true, true).applyTo(
74 composite);
75
76 GridLayoutFactory.fillDefaults().generateLayout(shell);
77 shell.pack();
78 shell.open();
79 while (!shell.isDisposed()) {
80 if (!display.readAndDispatch())
81 display.sleep();
82 }
83 }
84 });
85 display.dispose();
86 }
87
88 static Timer timer = new Timer(true);
89
90 static class Counter extends WritableValue {
91 Counter() {
92 super(new Integer(0), Integer.class);
93 scheduleIncrementTask();
94 }
95
96 private void scheduleIncrementTask() {
97 timer.schedule(new TimerTask() {
98 public void run() {
99 // we have to get onto the realm (UI thread) to perform the
100 // increment
101 getRealm().asyncExec(new Runnable() {
102 public void run() {
103 Integer currentVal = (Integer) getValue();
104 setValue(new Integer(currentVal.intValue() + 1));
105 }
106 });
107 scheduleIncrementTask();
108 }
109 }, 1000);
110 }
111 }
112 }