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Java > Open Source Codes > org > objectstyle > cayenne > modeler > dialog > UnsavedChangesDialog


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:
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13  * 1. Redistributions of source code must retain the above copyright
14  * notice, this list of conditions and the following disclaimer.
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16  * 2. Redistributions in binary form must reproduce the above copyright
17  * notice, this list of conditions and the following disclaimer in
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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.
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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
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41  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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43  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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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  */

56 package org.objectstyle.cayenne.modeler.dialog;
57
58 import java.awt.Component JavaDoc;
59
60 import javax.swing.JDialog JavaDoc;
61 import javax.swing.JOptionPane JavaDoc;
62
63 /**
64  * @author Andrei Adamchik
65  */

66 public class UnsavedChangesDialog {
67
68     private static final String JavaDoc SAVE_AND_CLOSE = "Save Changes";
69     private static final String JavaDoc CLOSE_WITHOUT_SAVE = "Ignore Changes";
70     private static final String JavaDoc CANCEL = "Cancel";
71
72     private static final String JavaDoc[] OPTIONS = new String JavaDoc[] {
73             SAVE_AND_CLOSE, CLOSE_WITHOUT_SAVE, CANCEL
74     };
75
76     protected Component JavaDoc parent;
77     protected String JavaDoc result = CANCEL;
78
79     public UnsavedChangesDialog(Component JavaDoc parent) {
80         this.parent = parent;
81     }
82
83     public void show() {
84         JOptionPane JavaDoc pane = new JOptionPane JavaDoc(
85                 "You have unsaved changes. Do you want to save them?",
86                 JOptionPane.QUESTION_MESSAGE);
87         pane.setOptions(OPTIONS);
88
89         JDialog JavaDoc dialog = pane.createDialog(parent, "Unsaved Changes");
90         dialog.setVisible(true);
91
92         Object JavaDoc selectedValue = pane.getValue();
93         // need to do an if..else chain, since
94
// sometimes values are unexpected
95
if (SAVE_AND_CLOSE.equals(selectedValue)) {
96             result = SAVE_AND_CLOSE;
97         }
98         else if (CLOSE_WITHOUT_SAVE.equals(selectedValue)) {
99             result = CLOSE_WITHOUT_SAVE;
100         }
101         else {
102             result = CANCEL;
103         }
104     }
105
106     public boolean shouldSave() {
107         return SAVE_AND_CLOSE.equals(result);
108     }
109
110     public boolean shouldNotSave() {
111         return CLOSE_WITHOUT_SAVE.equals(result);
112     }
113
114     public boolean shouldCancel() {
115         return result == null || CANCEL.equals(result);
116     }
117 }
118
119
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