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1: /* MetalComboBoxButton.java 2: Copyright (C) 2005 Free Software Foundation, Inc. 3: 4: This file is part of GNU Classpath. 5: 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) 9: any later version. 10: 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. 15: 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 19: 02110-1301 USA. 20: 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 24: combination. 25: 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. */ 37: 38: 39: package javax.swing.plaf.metal; 40: 41: import java.awt.Component; 42: import java.awt.Graphics; 43: import java.awt.Insets; 44: import java.awt.Rectangle; 45: 46: import javax.swing.CellRendererPane; 47: import javax.swing.Icon; 48: import javax.swing.JButton; 49: import javax.swing.JComboBox; 50: import javax.swing.JList; 51: import javax.swing.SwingUtilities; 52: 53: /** 54: * A button used by the {@link MetalComboBoxUI} class. 55: */ 56: public class MetalComboBoxButton extends JButton { 57: 58: /** A reference to the JComboBox that the button belongs to. */ 59: protected JComboBox comboBox; 60: 61: /** A reference to the JList. */ 62: protected JList listBox; 63: 64: /** ??? */ 65: protected CellRendererPane rendererPane; 66: 67: /** The button icon. */ 68: protected Icon comboIcon; 69: 70: /** Display just the icon, or the icon plus the label. */ 71: protected boolean iconOnly; 72: 73: /** 74: * Creates a new button. 75: * 76: * @param cb the combo that the button is used for (<code>null</code> not 77: * permitted). 78: * @param i the icon displayed on the button. 79: * @param pane the rendering pane. 80: * @param list the list. 81: */ 82: public MetalComboBoxButton(JComboBox cb, Icon i, CellRendererPane pane, 83: JList list) 84: { 85: this(cb, i, cb.isEditable(), pane, list); 86: } 87: 88: /** 89: * Creates a new button. 90: * 91: * @param cb the combo that the button is used for (<code>null</code> not 92: * permitted). 93: * @param i the icon displayed on the button. 94: * @parma onlyIcon a flag that specifies whether the button displays only an 95: * icon, or text as well. 96: * @param pane the rendering pane. 97: * @param list the list. 98: */ 99: public MetalComboBoxButton(JComboBox cb, Icon i, boolean onlyIcon, 100: CellRendererPane pane, JList list) 101: { 102: super(); 103: if (cb == null) 104: throw new NullPointerException("Null 'cb' argument"); 105: comboBox = cb; 106: comboIcon = i; 107: iconOnly = onlyIcon; 108: listBox = list; 109: rendererPane = pane; 110: } 111: 112: /** 113: * Returns the combo box that the button is used with. 114: * 115: * @return The combo box. 116: */ 117: public final JComboBox getComboBox() 118: { 119: return comboBox; 120: } 121: 122: /** 123: * Sets the combo box that the button is used with. 124: * 125: * @param cb the combo box. 126: */ 127: public final void setComboBox(JComboBox cb) 128: { 129: comboBox = cb; 130: } 131: 132: /** 133: * Returns the icon displayed by the button. By default, this will be an 134: * instance of {@link MetalComboBoxIcon}. 135: * 136: * @return The icon displayed by the button. 137: */ 138: public final Icon getComboIcon() 139: { 140: return comboIcon; 141: } 142: 143: /** 144: * Sets the icon displayed by the button. 145: * 146: * @param i the icon. 147: */ 148: public final void setComboIcon(Icon i) 149: { 150: comboIcon = i; 151: } 152: 153: /** 154: * Returns a flag that controls whether the button displays an icon only, 155: * or text as well. 156: * 157: * @return A boolean. 158: */ 159: public final boolean isIconOnly() 160: { 161: return iconOnly; 162: } 163: 164: /** 165: * Sets the flag that controls whether the button displays an icon only, 166: * or text as well. 167: * 168: * @param isIconOnly the flag. 169: */ 170: public final void setIconOnly(boolean isIconOnly) 171: { 172: iconOnly = isIconOnly; 173: } 174: 175: /** 176: * Returns <code>false</code>, to indicate that this component is not part 177: * of the focus traversal group. 178: * 179: * @return <code>false</code> 180: */ 181: public boolean isFocusTraversable() 182: { 183: return false; 184: } 185: 186: /** 187: * Enables or disables the button. 188: * 189: * @param enabled the new status. 190: */ 191: public void setEnabled(boolean enabled) 192: { 193: super.setEnabled(enabled); 194: // TODO: figure out what this might need to be used for 195: // perhaps it has something to do with the button's icon and/or border? 196: } 197: 198: /** 199: * Paints the component. 200: * 201: * @param g the graphics device. 202: */ 203: public void paintComponent(Graphics g) 204: { 205: super.paintComponent(g); 206: if (iconOnly) 207: { 208: Rectangle bounds = getBounds(); 209: int x = (bounds.width - comboIcon.getIconWidth()) / 2; 210: int y = (bounds.height - comboIcon.getIconHeight()) / 2; 211: comboIcon.paintIcon(comboBox, g, x, y); 212: } 213: else 214: { 215: Object selected = comboBox.getModel().getSelectedItem(); 216: if (selected == null) 217: selected = ""; 218: Rectangle bounds = comboBox.getBounds(); 219: Rectangle innerArea = SwingUtilities.calculateInnerArea(this, null); 220: Insets insets = comboBox.getInsets(); 221: Rectangle renderArea = new Rectangle(innerArea.x, innerArea.y, 222: innerArea.width - comboIcon.getIconWidth() - 4, innerArea.height); 223: Component cellRenderer 224: = comboBox.getRenderer().getListCellRendererComponent(this.listBox, 225: selected, comboBox.getSelectedIndex(), false, false); 226: cellRenderer.setBackground(comboBox.getBackground()); 227: cellRenderer.setEnabled(comboBox.isEnabled()); 228: rendererPane.paintComponent(g, cellRenderer, this, renderArea); 229: if (comboBox.hasFocus()) 230: { 231: g.setColor(MetalLookAndFeel.getFocusColor()); 232: g.drawRect(innerArea.x, innerArea.y - 1, innerArea.width - 1, 233: innerArea.height); 234: } 235: int iconX = bounds.width - insets.right - comboIcon.getIconWidth() - 7; 236: int iconY = insets.top 237: + (bounds.height - comboIcon.getIconHeight()) / 2; 238: comboIcon.paintIcon(comboBox, g, iconX, iconY); 239: } 240: } 241: }
GNU Classpath (0.20) |