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Java > Open Source Codes > org > jfree > ui > Spinner


1 /* ========================================================================
2  * JCommon : a free general purpose class library for the Java(tm) platform
3  * ========================================================================
4  *
5  * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
6  *
7  * Project Info: http://www.jfree.org/jcommon/index.html
8  *
9  * This library is free software; you can redistribute it and/or modify it
10  * under the terms of the GNU Lesser General Public License as published by
11  * the Free Software Foundation; either version 2.1 of the License, or
12  * (at your option) any later version.
13  *
14  * This library is distributed in the hope that it will be useful, but
15  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
17  * License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with this library; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
22  * USA.
23  *
24  * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
25  * in the United States and other countries.]
26  *
27  * ------------
28  * Spinner.java
29  * ------------
30  * (C) Copyright 2002-2004, by Object Refinery Limited.
31  *
32  * Original Author: David Gilbert (for Object Refinery Limited);
33  * Contributor(s): -;
34  *
35  * $Id $
36  *
37  * Changes
38  * -------
39  * 14-Oct-2002 : Version 1 (DG);
40  *
41  */
42
43 package org.jfree.ui;
44
45 import java.awt.BorderLayout JavaDoc;
46 import java.awt.GridLayout JavaDoc;
47 import java.awt.event.MouseEvent JavaDoc;
48 import java.awt.event.MouseListener JavaDoc;
49
50 import javax.swing.JPanel JavaDoc;
51 import javax.swing.JTextField JavaDoc;
52 import javax.swing.SwingConstants JavaDoc;
53
54 /**
55  * A very basic spinner component, used for demo purposes only.
56  *
57  * @author David Gilbert
58  */
59 public class Spinner extends JPanel JavaDoc implements MouseListener JavaDoc {
60
61     /** The current value. */
62     private int value;
63
64     /** The text field displaying the value. */
65     private JTextField JavaDoc textField;
66
67     /** The arrow button panel. */
68     private JPanel JavaDoc buttonPanel;
69
70     /** The up button. */
71     private ArrowPanel upButton;
72
73     /** The down button. */
74     private ArrowPanel downButton;
75
76     /**
77      * Creates a new spinner.
78      *
79      * @param value the initial value.
80      */
81     public Spinner(final int value) {
82         super(new BorderLayout JavaDoc());
83         this.value = value;
84         this.textField = new JTextField JavaDoc(Integer.toString(this.value));
85         this.textField.setHorizontalAlignment(SwingConstants.RIGHT);
86         add(this.textField);
87         this.buttonPanel = new JPanel JavaDoc(new GridLayout JavaDoc(2, 1, 0, 1));
88         this.upButton = new ArrowPanel(ArrowPanel.UP);
89         this.upButton.addMouseListener(this);
90         this.downButton = new ArrowPanel(ArrowPanel.DOWN);
91         this.downButton.addMouseListener(this);
92         this.buttonPanel.add(this.upButton);
93         this.buttonPanel.add(this.downButton);
94         add(this.buttonPanel, BorderLayout.EAST);
95     }
96
97     /**
98      * Returns the current value.
99      *
100      * @return the current value.
101      */
102     public int getValue() {
103         return this.value;
104     }
105
106     /**
107      * Receives notification of mouse clicks.
108      *
109      * @param e the mouse event.
110      */
111     public void mouseClicked(final MouseEvent JavaDoc e) {
112         if (e.getSource() == this.upButton) {
113             this.value++;
114             this.textField.setText(Integer.toString(this.value));
115             firePropertyChange("value", this.value - 1, this.value);
116         }
117         else if (e.getSource() == this.downButton) {
118             this.value--;
119             this.textField.setText(Integer.toString(this.value));
120             firePropertyChange("value", this.value + 1, this.value);
121         }
122     }
123
124     /**
125      * Receives notification of mouse events.
126      *
127      * @param e the mouse event.
128      */
129     public void mouseEntered(final MouseEvent JavaDoc e) {
130         // ignored
131 }
132
133     /**
134      * Receives notification of mouse events.
135      *
136      * @param e the mouse event.
137      */
138     public void mouseExited(final MouseEvent JavaDoc e) {
139         // ignored
140 }
141
142     /**
143      * Receives notification of mouse events.
144      *
145      * @param e the mouse event.
146      */
147     public void mousePressed(final MouseEvent JavaDoc e) {
148         // ignored
149 }
150
151     /**
152      * Receives notification of mouse events.
153      *
154      * @param e the mouse event.
155      */
156     public void mouseReleased(final MouseEvent JavaDoc e) {
157         // ignored
158 }
159
160 }
161
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