Source code: org/lucane/common/ListBox.java
1 /*
2 * Lucane - a collaborative platform
3 * Copyright (C) 2002 Gautier Ringeisen <gautier_ringeisen@hotmail.com>
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19 package org.lucane.common;
20
21 import java.awt.*;
22 import java.awt.event.*;
23 import java.util.Vector;
24 import javax.swing.*;
25
26
27 /**
28 * A ListBox dialog to select an element in a list
29 */
30 class ListBox
31 extends JDialog
32 implements ActionListener
33 {
34 private Vector list;
35 private JButton btOK;
36 private JButton btCancel;
37 private JList lstSelection;
38 private JPanel pnlButton;
39 private JPanel pnlEast;
40 private JScrollPane pnlScroll;
41 private boolean accept;
42
43 /**
44 * Creates a new ListBox object.
45 *
46 * @param owner the base JFrame (can be null)
47 * @param title the title of the dialog box
48 * @param message th emessage of the dialog box
49 * @param list a Vector of items
50 */
51 public ListBox(JFrame owner, String title, String message, Vector list)
52 {
53 super(owner, title, true);
54 this.list = list;
55 btOK = new JButton("OK");
56 btCancel = new JButton("Cancel");
57 lstSelection = new JList(list);
58 pnlEast = new JPanel(new BorderLayout());
59 pnlButton = new JPanel(new GridLayout(2, 0));
60 pnlScroll = new JScrollPane(lstSelection);
61 pnlButton.add(btOK);
62 pnlButton.add(btCancel);
63 pnlEast.add(pnlButton, BorderLayout.NORTH);
64 btOK.addActionListener(this);
65 btCancel.addActionListener(this);
66 lstSelection.getSelectionModel().setSelectionMode(0);
67 this.setSize(400, 200);
68 this.getContentPane().setLayout(new BorderLayout(3, 3));
69 this.getContentPane().add(new JLabel(message), BorderLayout.NORTH);
70 this.getContentPane().add(pnlScroll, BorderLayout.CENTER);
71 this.getContentPane().add(pnlEast, BorderLayout.EAST);
72 }
73
74 /**
75 * Get the selected item index
76 *
77 * @return the selected index
78 */
79 public int selectItemByIndex()
80 {
81 if(list.size() == 0)
82 return -1;
83
84 this.show();
85
86 if(accept)
87 return lstSelection.getSelectedIndex();
88 else
89 return -1;
90 }
91
92 /**
93 * A button has been clicked (oh my god!)
94 *
95 * @param ev yet another event...
96 */
97 public void actionPerformed(ActionEvent ev)
98 {
99 if(ev.getSource() == btOK)
100 accept = true;
101 else
102 accept = false;
103
104 this.hide();
105 }
106 }