2 Copyright (C) 2005 Free Software Foundation, Inc.
4 This file is part of GNU Classpath.
6 GNU Classpath is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU Classpath is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Classpath; see the file COPYING. If not, write to the
18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 Linking this library statically or dynamically with other modules is
22 making a combined work based on this library. Thus, the terms and
23 conditions of the GNU General Public License cover the whole
26 As a special exception, the copyright holders of this library give you
27 permission to link this library with independent modules to produce an
28 executable, regardless of the license terms of these independent
29 modules, and to copy and distribute the resulting executable under
30 terms of your choice, provided that you also meet, for each linked
31 independent module, the terms and conditions of the license of that
32 module. An independent module is a module which is not derived from
33 or based on this library. If you modify this library, you may extend
34 this exception to your version of the library, but you are not
35 obligated to do so. If you do not wish to do so, delete this
36 exception statement from your version. */
39 package javax.swing.plaf.metal;
41 import java.awt.Color;
43 import java.awt.FontMetrics;
44 import java.awt.Graphics;
45 import java.awt.Rectangle;
47 import javax.swing.AbstractButton;
48 import javax.swing.ButtonModel;
49 import javax.swing.JButton;
50 import javax.swing.JComponent;
51 import javax.swing.SwingConstants;
52 import javax.swing.UIManager;
53 import javax.swing.plaf.ComponentUI;
54 import javax.swing.plaf.UIResource;
55 import javax.swing.plaf.basic.BasicButtonListener;
56 import javax.swing.plaf.basic.BasicButtonUI;
59 * A UI delegate for the {@link JButton} component.
61 * @author Roman Kennke (roman@kennke.org)
63 public class MetalButtonUI
67 /** The color used to draw the focus rectangle around the text and/or icon. */
68 protected Color focusColor;
70 /** The background color for the button when it is pressed. */
71 protected Color selectColor;
73 /** The color for disabled button labels. */
74 protected Color disabledTextColor;
77 * Creates a new instance.
79 public MetalButtonUI()
82 focusColor = UIManager.getColor(getPropertyPrefix() + "focus");
83 selectColor = UIManager.getColor(getPropertyPrefix() + "select");
84 disabledTextColor = UIManager.getColor(getPropertyPrefix() + "disabledText");
88 * Returns the color for the focus border.
90 * @return the color for the focus border
92 protected Color getFocusColor()
98 * Returns the color that indicates a selected button.
100 * @return the color that indicates a selected button
102 protected Color getSelectColor()
108 * Returns the color for the text label of disabled buttons.
110 * @return the color for the text label of disabled buttons
112 protected Color getDisabledTextColor()
114 return disabledTextColor;
118 * Returns a UI delegate for the specified component.
120 * @param c the component (should be a subclass of {@link AbstractButton}).
122 * @return A new instance of <code>MetalButtonUI</code>.
124 public static ComponentUI createUI(JComponent c) {
125 return new MetalButtonUI();
129 * Installs the default settings for the specified button.
131 * @param button the button.
133 * @see #uninstallDefaults(AbstractButton)
135 public void installDefaults(AbstractButton button)
137 super.installDefaults(button);
138 button.setRolloverEnabled(UIManager.getBoolean(
139 getPropertyPrefix() + "rollover"));
143 * Removes the defaults added by {@link #installDefaults(AbstractButton)}.
145 public void uninstallDefaults(AbstractButton button)
147 super.uninstallDefaults(button);
148 button.setRolloverEnabled(false);
152 * Returns a button listener for the specified button.
154 * @param button the button.
156 * @return A button listener.
158 protected BasicButtonListener createButtonListener(AbstractButton button)
160 return new MetalButtonListener(button);
164 * Paints the background of the button to indicate that it is in the
167 * @param g the graphics context.
168 * @param b the button.
170 protected void paintButtonPressed(Graphics g, AbstractButton b)
172 if (b.isContentAreaFilled())
174 Rectangle area = b.getVisibleRect();
175 g.setColor(selectColor);
176 g.fillRect(area.x, area.y, area.width, area.height);
181 * Paints the focus rectangle around the button text and/or icon.
183 * @param g the graphics context.
184 * @param b the button.
185 * @param viewRect the button bounds.
186 * @param textRect the text bounds.
187 * @param iconRect the icon bounds.
189 protected void paintFocus(Graphics g, AbstractButton b, Rectangle viewRect,
190 Rectangle textRect, Rectangle iconRect) {
191 if (b.isEnabled() && b.hasFocus() && b.isFocusPainted())
193 Color savedColor = g.getColor();
194 g.setColor(getFocusColor());
195 Rectangle focusRect = iconRect.union(textRect);
196 g.drawRect(focusRect.x - 1, focusRect.y,
197 focusRect.width + 1, focusRect.height);
198 g.setColor(savedColor);
203 * Paints the button text.
205 * @param g the graphics context.
206 * @param c the button.
207 * @param textRect the text bounds.
208 * @param text the text to display.
210 protected void paintText(Graphics g, JComponent c, Rectangle textRect,
213 AbstractButton b = (AbstractButton) c;
214 Font f = b.getFont();
216 FontMetrics fm = g.getFontMetrics(f);
220 g.setColor(b.getForeground());
221 g.drawString(text, textRect.x, textRect.y + fm.getAscent());
225 g.setColor(getDisabledTextColor());
226 g.drawString(text, textRect.x, textRect.y + fm.getAscent());
231 * If the property <code>Button.gradient</code> is set, then a gradient is
232 * painted as background, otherwise the normal superclass behaviour is
235 public void update(Graphics g, JComponent c)
237 AbstractButton b = (AbstractButton) c;
238 ButtonModel m = b.getModel();
239 if (b.isContentAreaFilled()
240 && (UIManager.get(getPropertyPrefix() + "gradient") != null)
241 && ! m.isPressed() && ! m.isArmed()
243 && (b.getBackground() instanceof UIResource))
245 MetalUtils.paintGradient(g, 0, 0, c.getWidth(), c.getHeight(),
246 SwingConstants.VERTICAL,
247 getPropertyPrefix() + "gradient");