Mercurial > projects > dwt2

comparison org.eclipse.jface.examples.databinding/src/org/eclipse/jface/examples/databinding/snippets/Snippet033CrossValidationControlDecoration.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) 2009 Matthew Hall 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 * Matthew Hall - initial API and implementation (bug 268472)
10 ******************************************************************************/
11
12 package org.eclipse.jface.examples.databinding.snippets;
13
14 import java.util.Date;
15
16 import org.eclipse.core.databinding.observable.Observables;
17 import org.eclipse.core.databinding.observable.Realm;
18 import org.eclipse.core.databinding.observable.value.IObservableValue;
19 import org.eclipse.core.databinding.validation.MultiValidator;
20 import org.eclipse.core.databinding.validation.ValidationStatus;
21 import org.eclipse.core.runtime.IStatus;
22 import org.eclipse.jface.databinding.swt.SWTObservables;
23 import org.eclipse.jface.databinding.swt.WidgetProperties;
24 import org.eclipse.jface.internal.databinding.provisional.fieldassist.ControlDecorationSupport;
25 import org.eclipse.jface.internal.databinding.provisional.fieldassist.ControlDecorationUpdater;
26 import org.eclipse.swt.SWT;
27 import org.eclipse.swt.graphics.Image;
28 import org.eclipse.swt.layout.GridData;
29 import org.eclipse.swt.layout.GridLayout;
30 import org.eclipse.swt.widgets.Composite;
31 import org.eclipse.swt.widgets.DateTime;
32 import org.eclipse.swt.widgets.Display;
33 import org.eclipse.swt.widgets.Label;
34 import org.eclipse.swt.widgets.Shell;
35
36 /**
37 * @since 3.2
38 *
39 */
40 public class Snippet033CrossValidationControlDecoration {
41 protected Shell shell;
42 private DateTime startDate;
43 private DateTime endDate;
44
45 /**
46 * Launch the application
47 *
48 * @param args
49 */
50 public static void main(String[] args) {
51 try {
52 Snippet033CrossValidationControlDecoration window = new Snippet033CrossValidationControlDecoration();
53 window.open();
54 } catch (Exception e) {
55 e.printStackTrace();
56 }
57 }
58
59 /**
60 * Open the window
61 */
62 public void open() {
63 final Display display = Display.getDefault();
64 Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() {
65 public void run() {
66 createContents();
67 shell.pack();
68 shell.open();
69 while (!shell.isDisposed()) {
70 if (!display.readAndDispatch())
71 display.sleep();
72 }
73 }
74 });
75 }
76
77 protected void createContents() {
78 shell = new Shell();
79 GridLayout layout = new GridLayout();
80 layout.numColumns = 4;
81 shell.setLayout(layout);
82 shell.setText("Snippet033CrossValidationControlDecoration.java");
83
84 final Label label = new Label(shell, SWT.NONE);
85 label.setLayoutData(new GridData());
86 label.setText("Start date");
87 startDate = new DateTime(shell, SWT.CALENDAR);
88 final GridData gd_startDate = new GridData();
89 gd_startDate.horizontalIndent = 10;
90 startDate.setLayoutData(gd_startDate);
91
92 final Label startDateLabel = new Label(shell, SWT.NONE);
93 startDateLabel.setLayoutData(new GridData());
94 startDateLabel.setText("End date");
95 endDate = new DateTime(shell, SWT.CALENDAR);
96 final GridData gd_endDate = new GridData();
97 gd_endDate.horizontalIndent = 10;
98 endDate.setLayoutData(gd_endDate);
99
100 bindUI();
101 }
102
103 private void bindUI() {
104 IObservableValue startDateObservable = WidgetProperties.selection()
105 .observe(startDate);
106 IObservableValue endDateObservable = WidgetProperties.selection()
107 .observe(endDate);
108
109 ControlDecorationSupport.create(new DateRangeValidator(
110 startDateObservable, endDateObservable,
111 "Start date must be on or before end date"), SWT.LEFT
112 | SWT.CENTER);
113
114 // Customize the decoration's description text and image
115 ControlDecorationUpdater decorationUpdater = new ControlDecorationUpdater() {
116 protected String getDescriptionText(IStatus status) {
117 return "ERROR: " + super.getDescriptionText(status);
118 }
119
120 protected Image getImage(IStatus status) {
121 return status.isOK() ? null : Display.getCurrent()
122 .getSystemImage(SWT.ICON_ERROR);
123 }
124 };
125 ControlDecorationSupport.create(new DateRangeValidator(Observables
126 .constantObservableValue(new Date()), startDateObservable,
127 "Choose a starting date later than today"), SWT.LEFT | SWT.TOP,
128 (Composite) null, decorationUpdater);
129 }
130
131 private static class DateRangeValidator extends MultiValidator {
132 private final IObservableValue start;
133 private final IObservableValue end;
134 private final String errorMessage;
135
136 public DateRangeValidator(IObservableValue start, IObservableValue end,
137 String errorMessage) {
138 this.start = start;
139 this.end = end;
140 this.errorMessage = errorMessage;
141 }
142
143 protected IStatus validate() {
144 Date startDate = (Date) start.getValue();
145 Date endDate = (Date) end.getValue();
146 if (startDate.compareTo(endDate) > 0)
147 return ValidationStatus.error(errorMessage);
148 return ValidationStatus.ok();
149 }
150 }
151 }