J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1998-2001 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package javax.swing.colorchooser; |
| 27 | |
| 28 | import java.awt.*; |
| 29 | import java.io.Serializable; |
| 30 | import javax.swing.*; |
| 31 | import javax.swing.event.*; |
| 32 | |
| 33 | /** |
| 34 | * This is the abstract superclass for color choosers. If you want to add |
| 35 | * a new color chooser panel into a <code>JColorChooser</code>, subclass |
| 36 | * this class. |
| 37 | * <p> |
| 38 | * <strong>Warning:</strong> |
| 39 | * Serialized objects of this class will not be compatible with |
| 40 | * future Swing releases. The current serialization support is |
| 41 | * appropriate for short term storage or RMI between applications running |
| 42 | * the same version of Swing. As of 1.4, support for long term storage |
| 43 | * of all JavaBeans<sup><font size="-2">TM</font></sup> |
| 44 | * has been added to the <code>java.beans</code> package. |
| 45 | * Please see {@link java.beans.XMLEncoder}. |
| 46 | * |
| 47 | * @author Tom Santos |
| 48 | * @author Steve Wilson |
| 49 | */ |
| 50 | public abstract class AbstractColorChooserPanel extends JPanel { |
| 51 | |
| 52 | /** |
| 53 | * |
| 54 | */ |
| 55 | private JColorChooser chooser; |
| 56 | |
| 57 | /** |
| 58 | * |
| 59 | */ |
| 60 | private ChangeListener colorListener; |
| 61 | |
| 62 | /** |
| 63 | * |
| 64 | */ |
| 65 | private boolean dirty = true; |
| 66 | |
| 67 | |
| 68 | /** |
| 69 | * Invoked automatically when the model's state changes. |
| 70 | * It is also called by <code>installChooserPanel</code> to allow |
| 71 | * you to set up the initial state of your chooser. |
| 72 | * Override this method to update your <code>ChooserPanel</code>. |
| 73 | */ |
| 74 | public abstract void updateChooser(); |
| 75 | |
| 76 | /** |
| 77 | * Builds a new chooser panel. |
| 78 | */ |
| 79 | protected abstract void buildChooser(); |
| 80 | |
| 81 | /** |
| 82 | * Returns a string containing the display name of the panel. |
| 83 | * @return the name of the display panel |
| 84 | */ |
| 85 | public abstract String getDisplayName(); |
| 86 | |
| 87 | /** |
| 88 | * Provides a hint to the look and feel as to the |
| 89 | * <code>KeyEvent.VK</code> constant that can be used as a mnemonic to |
| 90 | * access the panel. A return value <= 0 indicates there is no mnemonic. |
| 91 | * <p> |
| 92 | * The return value here is a hint, it is ultimately up to the look |
| 93 | * and feel to honor the return value in some meaningful way. |
| 94 | * <p> |
| 95 | * This implementation returns 0, indicating the |
| 96 | * <code>AbstractColorChooserPanel</code> does not support a mnemonic, |
| 97 | * subclasses wishing a mnemonic will need to override this. |
| 98 | * |
| 99 | * @return KeyEvent.VK constant identifying the mnemonic; <= 0 for no |
| 100 | * mnemonic |
| 101 | * @see #getDisplayedMnemonicIndex |
| 102 | * @since 1.4 |
| 103 | */ |
| 104 | public int getMnemonic() { |
| 105 | return 0; |
| 106 | } |
| 107 | |
| 108 | /** |
| 109 | * Provides a hint to the look and feel as to the index of the character in |
| 110 | * <code>getDisplayName</code> that should be visually identified as the |
| 111 | * mnemonic. The look and feel should only use this if |
| 112 | * <code>getMnemonic</code> returns a value > 0. |
| 113 | * <p> |
| 114 | * The return value here is a hint, it is ultimately up to the look |
| 115 | * and feel to honor the return value in some meaningful way. For example, |
| 116 | * a look and feel may wish to render each |
| 117 | * <code>AbstractColorChooserPanel</code> in a <code>JTabbedPane</code>, |
| 118 | * and further use this return value to underline a character in |
| 119 | * the <code>getDisplayName</code>. |
| 120 | * <p> |
| 121 | * This implementation returns -1, indicating the |
| 122 | * <code>AbstractColorChooserPanel</code> does not support a mnemonic, |
| 123 | * subclasses wishing a mnemonic will need to override this. |
| 124 | * |
| 125 | * @return Character index to render mnemonic for; -1 to provide no |
| 126 | * visual identifier for this panel. |
| 127 | * @see #getMnemonic |
| 128 | * @since 1.4 |
| 129 | */ |
| 130 | public int getDisplayedMnemonicIndex() { |
| 131 | return -1; |
| 132 | } |
| 133 | |
| 134 | /** |
| 135 | * Returns the small display icon for the panel. |
| 136 | * @return the small display icon |
| 137 | */ |
| 138 | public abstract Icon getSmallDisplayIcon(); |
| 139 | |
| 140 | /** |
| 141 | * Returns the large display icon for the panel. |
| 142 | * @return the large display icon |
| 143 | */ |
| 144 | public abstract Icon getLargeDisplayIcon(); |
| 145 | |
| 146 | /** |
| 147 | * Invoked when the panel is added to the chooser. |
| 148 | * If you override this, be sure to call <code>super</code>. |
| 149 | * @param enclosingChooser the panel to be added |
| 150 | * @exception RuntimeException if the chooser panel has already been |
| 151 | * installed |
| 152 | */ |
| 153 | public void installChooserPanel(JColorChooser enclosingChooser) { |
| 154 | if (chooser != null) { |
| 155 | throw new RuntimeException ("This chooser panel is already installed"); |
| 156 | } |
| 157 | chooser = enclosingChooser; |
| 158 | buildChooser(); |
| 159 | updateChooser(); |
| 160 | colorListener = new ModelListener(); |
| 161 | getColorSelectionModel().addChangeListener(colorListener); |
| 162 | } |
| 163 | |
| 164 | /** |
| 165 | * Invoked when the panel is removed from the chooser. |
| 166 | * If override this, be sure to call <code>super</code>. |
| 167 | */ |
| 168 | public void uninstallChooserPanel(JColorChooser enclosingChooser) { |
| 169 | getColorSelectionModel().removeChangeListener(colorListener); |
| 170 | chooser = null; |
| 171 | } |
| 172 | |
| 173 | /** |
| 174 | * Returns the model that the chooser panel is editing. |
| 175 | * @return the <code>ColorSelectionModel</code> model this panel |
| 176 | * is editing |
| 177 | */ |
| 178 | public ColorSelectionModel getColorSelectionModel() { |
| 179 | return chooser.getSelectionModel(); |
| 180 | } |
| 181 | |
| 182 | /** |
| 183 | * Returns the color that is currently selected. |
| 184 | * @return the <code>Color</code> that is selected |
| 185 | */ |
| 186 | protected Color getColorFromModel() { |
| 187 | return getColorSelectionModel().getSelectedColor(); |
| 188 | } |
| 189 | |
| 190 | /** |
| 191 | * Draws the panel. |
| 192 | * @param g the <code>Graphics</code> object |
| 193 | */ |
| 194 | public void paint(Graphics g) { |
| 195 | if (dirty) { |
| 196 | updateChooser(); |
| 197 | dirty = false; |
| 198 | } |
| 199 | super.paint(g); |
| 200 | } |
| 201 | |
| 202 | /** |
| 203 | * Returns an integer from the defaults table. If <code>key</code> does |
| 204 | * not map to a valid <code>Integer</code>, <code>default</code> is |
| 205 | * returned. |
| 206 | * |
| 207 | * @param key an <code>Object</code> specifying the int |
| 208 | * @param defaultValue Returned value if <code>key</code> is not available, |
| 209 | * or is not an Integer |
| 210 | * @return the int |
| 211 | */ |
| 212 | int getInt(Object key, int defaultValue) { |
| 213 | Object value = UIManager.get(key, getLocale()); |
| 214 | |
| 215 | if (value instanceof Integer) { |
| 216 | return ((Integer)value).intValue(); |
| 217 | } |
| 218 | if (value instanceof String) { |
| 219 | try { |
| 220 | return Integer.parseInt((String)value); |
| 221 | } catch (NumberFormatException nfe) {} |
| 222 | } |
| 223 | return defaultValue; |
| 224 | } |
| 225 | |
| 226 | /** |
| 227 | * |
| 228 | */ |
| 229 | class ModelListener implements ChangeListener, Serializable { |
| 230 | public void stateChanged(ChangeEvent e) { |
| 231 | if (isShowing()) { // isVisible |
| 232 | updateChooser(); |
| 233 | dirty = false; |
| 234 | } else { |
| 235 | dirty = true; |
| 236 | } |
| 237 | } |
| 238 | } |
| 239 | } |