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1: /* DefaultTableCellRenderer.java -- 2: Copyright (C) 2002, 2004, 2005, 2006, 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.table; 40: 41: import java.awt.Color; 42: import java.awt.Component; 43: import java.awt.Rectangle; 44: import java.io.Serializable; 45: 46: import javax.swing.JLabel; 47: import javax.swing.JTable; 48: import javax.swing.UIManager; 49: import javax.swing.border.Border; 50: import javax.swing.border.EmptyBorder; 51: 52: /** 53: * Class to display every cells. 54: */ 55: public class DefaultTableCellRenderer extends JLabel 56: implements TableCellRenderer, Serializable 57: { 58: static final long serialVersionUID = 7878911414715528324L; 59: 60: protected static Border noFocusBorder = new EmptyBorder(1, 1, 1, 1); 61: 62: public static class UIResource extends DefaultTableCellRenderer 63: implements javax.swing.plaf.UIResource 64: { 65: public UIResource() 66: { 67: super(); 68: } 69: } 70: 71: /** 72: * Stores the color set by setForeground(). 73: */ 74: Color foreground; 75: 76: /** 77: * Stores the color set by setBackground(). 78: */ 79: Color background; 80: 81: /** 82: * Creates a default table cell renderer with an empty border. 83: */ 84: public DefaultTableCellRenderer() 85: { 86: super(); 87: } 88: 89: /** 90: * Assign the unselected-foreground. 91: * 92: * @param c the color to assign 93: */ 94: public void setForeground(Color c) 95: { 96: super.setForeground(c); 97: foreground = c; 98: } 99: 100: /** 101: * Assign the unselected-background. 102: * 103: * @param c the color to assign 104: */ 105: public void setBackground(Color c) 106: { 107: super.setBackground(c); 108: background = c; 109: } 110: 111: /** 112: * Look and feel has changed. 113: * 114: * <p>Replaces the current UI object with the latest version from 115: * the UIManager.</p> 116: */ 117: public void updateUI() 118: { 119: super.updateUI(); 120: background = null; 121: foreground = null; 122: } 123: 124: /** 125: * Get the string value of the object and pass it to setText(). 126: * 127: * @param table the JTable 128: * @param value the value of the object. For the text content, 129: * null is rendered as an empty cell. 130: * @param isSelected is the cell selected? 131: * @param hasFocus has the cell the focus? 132: * @param row the row to render 133: * @param column the cell to render 134: * 135: * @return this component (the default table cell renderer) 136: */ 137: public Component getTableCellRendererComponent(JTable table, Object value, 138: boolean isSelected, 139: boolean hasFocus, 140: int row, int column) 141: { 142: setValue(value); 143: setOpaque(true); 144: 145: if (table == null) 146: return this; 147: 148: if (isSelected) 149: { 150: super.setBackground(table.getSelectionBackground()); 151: super.setForeground(table.getSelectionForeground()); 152: } 153: else 154: { 155: if (background != null) 156: super.setBackground(background); 157: else 158: super.setBackground(table.getBackground()); 159: if (foreground != null) 160: super.setForeground(foreground); 161: else 162: super.setForeground(table.getForeground()); 163: } 164: 165: Border b = null; 166: if (hasFocus) 167: { 168: if (isSelected) 169: b = UIManager.getBorder("Table.focusSelectedCellHighlightBorder"); 170: if (b == null) 171: b = UIManager.getBorder("Table.focusCellHighlightBorder"); 172: } 173: else 174: b = noFocusBorder; 175: setBorder(b); 176: 177: setFont(table.getFont()); 178: 179: // If the current background is equal to the table's background, then we 180: // can avoid filling the background by setting the renderer opaque. 181: Color back = getBackground(); 182: setOpaque(back != null && back.equals(table.getBackground())); 183: 184: return this; 185: } 186: 187: /** 188: * Overriden for performance. 189: * 190: * <p>This method needs to be overridden in a subclass to actually 191: * do something.</p> 192: * 193: * @return always true 194: */ 195: public boolean isOpaque() 196: { 197: return true; 198: } 199: 200: /** 201: * Overriden for performance. 202: * 203: * <p>This method needs to be overridden in a subclass to actually 204: * do something.</p> 205: */ 206: public void validate() 207: { 208: // Does nothing. 209: } 210: 211: public void revalidate() 212: { 213: // Does nothing. 214: } 215: 216: /** 217: * Overriden for performance. 218: * 219: * <p>This method needs to be overridden in a subclass to actually 220: * do something.</p> 221: */ 222: public void repaint(long tm, int x, int y, int width, int height) 223: { 224: // Does nothing. 225: } 226: 227: /** 228: * Overriden for performance. 229: * 230: * <p>This method needs to be overridden in a subclass to actually 231: * do something.</p> 232: */ 233: public void repaint(Rectangle r) 234: { 235: // Does nothing. 236: } 237: 238: /** 239: * Overriden for performance. 240: * 241: * <p>This method needs to be overridden in a subclass to actually 242: * do something.</p> 243: */ 244: protected void firePropertyChange(String propertyName, Object oldValue, 245: Object newValue) 246: { 247: // Does nothing. 248: } 249: 250: /** 251: * Overriden for performance. 252: * 253: * <p>This method needs to be overridden in a subclass to actually 254: * do something.</p> 255: */ 256: public void firePropertyChange(String propertyName, boolean oldValue, 257: boolean newValue) 258: { 259: // Does nothing. 260: } 261: 262: /** 263: * Sets the String for this cell. 264: * 265: * @param value the string value for this cell; if value is null it 266: * sets the text value to an empty string 267: */ 268: protected void setValue(Object value) 269: { 270: if (value != null) 271: setText(value.toString()); 272: else 273: // null is rendered as an empty cell. 274: setText(""); 275: } 276: }