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1: /* CellRendererPane.java -- 2: Copyright (C) 2002, 2004 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; 40: 41: import java.awt.Component; 42: import java.awt.Container; 43: import java.awt.Graphics; 44: import java.awt.Rectangle; 45: 46: import javax.accessibility.Accessible; 47: import javax.accessibility.AccessibleContext; 48: import javax.accessibility.AccessibleRole; 49: 50: /** 51: * The CellRendererPane's purpose is to paint the cells of JList, JTable and 52: * JTree. It intercepts the usual paint tree, so that we don't walk up and 53: * repaint everything. 54: * 55: * @author Andrew Selkirk 56: * @version 1.0 57: */ 58: public class CellRendererPane 59: extends Container 60: implements Accessible 61: { 62: private static final long serialVersionUID = -7642183829532984273L; 63: 64: /** 65: * AccessibleCellRendererPane 66: */ 67: protected class AccessibleCellRendererPane extends AccessibleAWTContainer 68: { 69: private static final long serialVersionUID = -8981090083147391074L; 70: 71: /** 72: * Constructor AccessibleCellRendererPane 73: * @param component TODO 74: */ 75: protected AccessibleCellRendererPane() 76: { 77: } 78: 79: /** 80: * getAccessibleRole 81: * @returns AccessibleRole 82: */ 83: public AccessibleRole getAccessibleRole() 84: { 85: return AccessibleRole.PANEL; 86: } 87: } 88: 89: /** 90: * accessibleContext 91: */ 92: protected AccessibleContext accessibleContext = null; 93: 94: 95: //------------------------------------------------------------- 96: // Initialization --------------------------------------------- 97: //------------------------------------------------------------- 98: 99: /** 100: * Constructs a new CellRendererPane. 101: */ 102: public CellRendererPane() 103: { 104: } // CellRendererPane() 105: 106: 107: //------------------------------------------------------------- 108: // Methods ---------------------------------------------------- 109: //------------------------------------------------------------- 110: 111: /** 112: * Should not be called. 113: * 114: * @param graphics not used here 115: */ 116: public void update(Graphics graphics) 117: { 118: } // update() 119: 120: /** 121: * Despite normal behaviour this does <em>not</em> cause the container 122: * to be invalidated. This prevents propagating up the paint tree. 123: */ 124: public void invalidate() 125: { 126: } // invalidate() 127: 128: /** 129: * Should not be called. 130: * 131: * @param graphics not used here 132: */ 133: public void paint(Graphics graphics) 134: { 135: } 136: 137: /** 138: * Overridden to check if a component is already a child of this Container. 139: * If it's already a child, nothing is done. Otherwise we pass this to 140: * <code>super.addImpl()</code>. 141: * 142: * @param c the component to add 143: * @param constraints not used here 144: * @param index not used here 145: */ 146: protected void addImpl(Component c, Object constraints, int index) 147: { 148: if (!isAncestorOf(c)) 149: { 150: super.addImpl(c, constraints, index); 151: } 152: } // addImpl() 153: 154: /** 155: * Paints the specified component <code>c</code> on the {@link Graphics} 156: * context <code>graphics</code>. The Graphics context is tranlated to 157: * (x,y) and the components bounds are set to (w,h). If 158: * <code>shouldValidate</code> 159: * is set to true, then the component is validated before painting. 160: * 161: * @param graphics the graphics context to paint on 162: * @param c the component to be painted 163: * @param p the parent of the component 164: * @param x the X coordinate of the upper left corner where c should 165: be painted 166: * @param y the Y coordinate of the upper left corner where c should 167: be painted 168: * @param w the width of the components drawing area 169: * @param h the height of the components drawing area 170: * @param shouldValidate if <code>c</code> should be validated before 171: * painting 172: */ 173: public void paintComponent(Graphics graphics, Component c, 174: Container p, int x, int y, int w, int h, 175: boolean shouldValidate) 176: { 177: // reparent c 178: addImpl(c, null, 0); 179: 180: // translate to (x,y) 181: graphics.translate(x, y); 182: 183: // set bounds of c 184: c.setBounds(0, 0, w, h); 185: 186: // validate if necessary 187: if (shouldValidate) 188: { 189: c.validate(); 190: } 191: 192: // paint component 193: c.paint(graphics); 194: 195: // untranslate g 196: graphics.translate(-x, -y); 197: 198: } // paintComponent() 199: 200: /** 201: * Paints the specified component <code>c</code> on the {@link Graphics} 202: * context <code>graphics</code>. The Graphics context is tranlated to (x,y) 203: * and the components bounds are set to (w,h). The component is <em>not</em> 204: * validated before painting. 205: * 206: * @param graphics the graphics context to paint on 207: * @param c the component to be painted 208: * @param p the parent of the component 209: * @param x the X coordinate of the upper left corner where c should 210: be painted 211: * @param y the Y coordinate of the upper left corner where c should 212: be painted 213: * @param w the width of the components drawing area 214: * @param h the height of the components drawing area 215: */ 216: public void paintComponent(Graphics graphics, Component c, 217: Container p, int x, int y, int w, int h) 218: { 219: paintComponent(graphics, c, p, x, y, w, h, false); 220: } // paintComponent() 221: 222: /** 223: * Paints the specified component <code>c</code> on the {@link Graphics} 224: * context <code>g</code>. The Graphics context is tranlated to (r.x,r.y) and 225: * the components bounds are set to (r.width,r.height). 226: * The component is <em>not</em> 227: * validated before painting. 228: * 229: * @param graphics the graphics context to paint on 230: * @param c the component to be painted 231: * @param p the component on which we paint 232: * @param r the bounding rectangle of c 233: */ 234: public void paintComponent(Graphics graphics, Component c, 235: Container p, Rectangle r) 236: { 237: paintComponent(graphics, c, p, r.x, r.y, r.width, r.height); 238: } // paintComponent() 239: 240: /** 241: * getAccessibleContext <em>TODO</em> 242: * @return AccessibleContext 243: */ 244: public AccessibleContext getAccessibleContext() 245: { 246: if (accessibleContext == null) 247: accessibleContext = new AccessibleCellRendererPane(); 248: 249: return accessibleContext; 250: } 251: }
GNU Classpath (0.17) |