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Java > Open Source Codes > org > objectstyle > cayenne > swing > TextBinding


1 /* ====================================================================
2  *
3  * The ObjectStyle Group Software License, version 1.1
4  * ObjectStyle Group - http://objectstyle.org/
5  *
6  * Copyright (c) 2002-2005, Andrei (Andrus) Adamchik and individual authors
7  * of the software. All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  *
13  * 1. Redistributions of source code must retain the above copyright
14  * notice, this list of conditions and the following disclaimer.
15  *
16  * 2. Redistributions in binary form must reproduce the above copyright
17  * notice, this list of conditions and the following disclaimer in
18  * the documentation and/or other materials provided with the
19  * distribution.
20  *
21  * 3. The end-user documentation included with the redistribution, if any,
22  * must include the following acknowlegement:
23  * "This product includes software developed by independent contributors
24  * and hosted on ObjectStyle Group web site (http://objectstyle.org/)."
25  * Alternately, this acknowlegement may appear in the software itself,
26  * if and wherever such third-party acknowlegements normally appear.
27  *
28  * 4. The names "ObjectStyle Group" and "Cayenne" must not be used to endorse
29  * or promote products derived from this software without prior written
30  * permission. For written permission, email
31  * "andrus at objectstyle dot org".
32  *
33  * 5. Products derived from this software may not be called "ObjectStyle"
34  * or "Cayenne", nor may "ObjectStyle" or "Cayenne" appear in their
35  * names without prior written permission.
36  *
37  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
38  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
39  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
40  * DISCLAIMED. IN NO EVENT SHALL THE OBJECTSTYLE GROUP OR
41  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
43  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
44  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
45  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
46  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
47  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48  * SUCH DAMAGE.
49  * ====================================================================
50  *
51  * This software consists of voluntary contributions made by many
52  * individuals and hosted on ObjectStyle Group web site. For more
53  * information on the ObjectStyle Group, please see
54  * <http://objectstyle.org/>.
55  */
package org.objectstyle.cayenne.swing;
56
57 import java.awt.Color JavaDoc;
58 import java.awt.Component JavaDoc;
59 import java.awt.event.ActionEvent JavaDoc;
60 import java.awt.event.ActionListener JavaDoc;
61
62 import javax.swing.InputVerifier JavaDoc;
63 import javax.swing.JComponent JavaDoc;
64 import javax.swing.JTextArea JavaDoc;
65 import javax.swing.JTextField JavaDoc;
66 import javax.swing.event.DocumentEvent JavaDoc;
67 import javax.swing.event.DocumentListener JavaDoc;
68 import javax.swing.text.JTextComponent JavaDoc;
69
70 import org.objectstyle.cayenne.modeler.dialog.validator.ValidatorDialog;
71 import org.objectstyle.cayenne.validation.ValidationException;
72
73 /**
74  * A generic text adapter that is bound to a bean property.
75  *
76  * @author Andrei Adamchik
77  */

78 public class TextBinding extends BindingBase {
79
80     protected JTextComponent JavaDoc textComponent;
81
82     protected Color JavaDoc defaultBGColor;
83     protected Color JavaDoc errorColor;
84     protected String JavaDoc defaultToolTip;
85
86     public TextBinding(JTextField JavaDoc textField, String JavaDoc expression) {
87         super(expression);
88         this.textComponent = textField;
89         initComponentDefaults();
90
91         textField.addActionListener(new ActionListener JavaDoc() {
92
93             public void actionPerformed(ActionEvent JavaDoc e) {
94                 updateModel();
95             }
96         });
97
98         textComponent.setInputVerifier(new InputVerifier JavaDoc() {
99
100             public boolean verify(JComponent JavaDoc c) {
101                 updateModel();
102                 // release focus after coloring the field...
103
return true;
104             }
105         });
106
107     }
108
109     public TextBinding(JTextArea JavaDoc textArea, String JavaDoc property) {
110         super(property);
111         this.textComponent = textArea;
112         initComponentDefaults();
113
114         textComponent.getDocument().addDocumentListener(new DocumentListener JavaDoc() {
115
116             public void insertUpdate(DocumentEvent JavaDoc e) {
117                 verifyTextChange(e);
118             }
119
120             public void changedUpdate(DocumentEvent JavaDoc e) {
121                 verifyTextChange(e);
122             }
123
124             public void removeUpdate(DocumentEvent JavaDoc e) {
125                 verifyTextChange(e);
126             }
127
128             void verifyTextChange(DocumentEvent JavaDoc e) {
129                 if (!modelUpdateDisabled) {
130                     updateModel();
131                 }
132             }
133         });
134     }
135
136     protected void initComponentDefaults() {
137         this.errorColor = ValidatorDialog.WARNING_COLOR;
138         this.defaultBGColor = textComponent.getBackground();
139         this.defaultToolTip = textComponent.getToolTipText();
140     }
141
142     public void updateView() {
143         Object JavaDoc value = getValue();
144         String JavaDoc text = (value != null) ? value.toString() : null;
145
146         modelUpdateDisabled = true;
147         try {
148             clear();
149             textComponent.setText(text);
150         }
151         finally {
152             modelUpdateDisabled = false;
153         }
154     }
155
156     /**
157      * Returns internal text component.
158      */

159     public Component JavaDoc getView() {
160         return textComponent;
161     }
162
163     protected void updateModel() {
164         try {
165             setValue(textComponent.getText());
166             clear();
167         }
168         catch (ValidationException vex) {
169             textComponent.setBackground(errorColor);
170             textComponent.setToolTipText(vex.getUnlabeledMessage());
171         }
172     }
173
174     protected void clear() {
175         textComponent.setBackground(defaultBGColor);
176         textComponent.setToolTipText(defaultToolTip);
177     }
178 }
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