001 /* MetalCheckBoxIcon.java -- An icon for JCheckBoxes in the Metal L&F
002 Copyright (C) 2005, 2006 Free Software Foundation, Inc.
003
004 This file is part of GNU Classpath.
005
006 GNU Classpath is free software; you can redistribute it and/or modify
007 it under the terms of the GNU General Public License as published by
008 the Free Software Foundation; either version 2, or (at your option)
009 any later version.
010
011 GNU Classpath is distributed in the hope that it will be useful, but
012 WITHOUT ANY WARRANTY; without even the implied warranty of
013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014 General Public License for more details.
015
016 You should have received a copy of the GNU General Public License
017 along with GNU Classpath; see the file COPYING. If not, write to the
018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019 02110-1301 USA.
020
021 Linking this library statically or dynamically with other modules is
022 making a combined work based on this library. Thus, the terms and
023 conditions of the GNU General Public License cover the whole
024 combination.
025
026 As a special exception, the copyright holders of this library give you
027 permission to link this library with independent modules to produce an
028 executable, regardless of the license terms of these independent
029 modules, and to copy and distribute the resulting executable under
030 terms of your choice, provided that you also meet, for each linked
031 independent module, the terms and conditions of the license of that
032 module. An independent module is a module which is not derived from
033 or based on this library. If you modify this library, you may extend
034 this exception to your version of the library, but you are not
035 obligated to do so. If you do not wish to do so, delete this
036 exception statement from your version. */
037
038
039 package javax.swing.plaf.metal;
040
041 import java.awt.Component;
042 import java.awt.Graphics;
043 import java.io.Serializable;
044
045 import javax.swing.AbstractButton;
046 import javax.swing.Icon;
047 import javax.swing.SwingConstants;
048 import javax.swing.UIManager;
049 import javax.swing.plaf.UIResource;
050
051 /**
052 * An {@link Icon} used by the {@link MetalCheckBoxUI} class.
053 *
054 * @author Roman Kennke (roman@kennke.org)
055 */
056 public class MetalCheckBoxIcon
057 implements Icon, UIResource, Serializable
058 {
059
060 /** Used to paint the border of the icon. */
061 MetalBorders.ButtonBorder border;
062
063 /**
064 * Creates a new MetalCheckBoxIcon instance.
065 */
066 public MetalCheckBoxIcon()
067 {
068 border = new MetalBorders.ButtonBorder();
069 }
070
071 /**
072 * Draws the check in the CheckBox.
073 *
074 * @param c the component to draw on
075 * @param g the Graphics context to draw with
076 * @param x the X position
077 * @param y the Y position
078 */
079 protected void drawCheck(Component c, Graphics g, int x, int y)
080 {
081 if (c.isEnabled())
082 g.setColor(MetalLookAndFeel.getBlack());
083 else
084 g.setColor(MetalLookAndFeel.getControlDisabled());
085 g.drawLine(3 + x, 5 + y, 3 + x, 9 + y);
086 g.drawLine(4 + x, 5 + y, 4 + x, 9 + y);
087 g.drawLine(5 + x, 7 + y, 9 + x, 3 + y);
088 g.drawLine(5 + x, 8 + y, 9 + x, 4 + y);
089 }
090
091 /**
092 * Returns the size (both X and Y) of the checkbox icon.
093 *
094 * @return the size of the checkbox icon
095 */
096 protected int getControlSize()
097 {
098 return 13;
099 }
100
101 /**
102 * Returns the width of the icon in pixels.
103 *
104 * @return the width of the icon in pixels
105 */
106 public int getIconWidth()
107 {
108 return getControlSize();
109 }
110
111 /**
112 * Returns the height of the icon in pixels.
113 *
114 * @return the height of the icon in pixels
115 */
116 public int getIconHeight()
117 {
118 return getControlSize();
119 }
120
121 /**
122 * Paints the icon. This first paints the border of the CheckBox and
123 * if the CheckBox is selected it calls {@link #drawCheck} to draw
124 * the check.
125 *
126 * @param c the Component to draw on (gets casted to JCheckBox)
127 * @param g the Graphics context to draw with
128 * @param x the X position
129 * @param y the Y position
130 */
131 public void paintIcon(Component c, Graphics g, int x, int y)
132 {
133 if (UIManager.get("CheckBox.gradient") != null)
134 MetalUtils.paintGradient(g, x, y, getIconWidth(), getIconHeight(),
135 SwingConstants.VERTICAL, "CheckBox.gradient");
136 border.paintBorder(c, g, x, y, getIconWidth(), getIconHeight());
137
138 AbstractButton b = (AbstractButton) c;
139 if (b.isSelected())
140 drawCheck(b, g, x, y);
141 }
142 }