| /* CellRendererPane.java -- |
| Copyright (C) 2002, 2004, 2006, Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package javax.swing; |
| |
| import java.awt.Component; |
| import java.awt.Container; |
| import java.awt.Graphics; |
| import java.awt.Rectangle; |
| |
| import javax.accessibility.Accessible; |
| import javax.accessibility.AccessibleContext; |
| import javax.accessibility.AccessibleRole; |
| |
| /** |
| * Paints the cells of JList, JTable and JTree. |
| * It intercepts the usual paint tree, so that we don't walk up and |
| * repaint everything. |
| * |
| * @author Andrew Selkirk |
| */ |
| public class CellRendererPane extends Container implements Accessible |
| { |
| private static final long serialVersionUID = -7642183829532984273L; |
| |
| /** |
| * Provides accessibility support for CellRendererPanes. |
| */ |
| protected class AccessibleCellRendererPane extends AccessibleAWTContainer |
| { |
| private static final long serialVersionUID = -8981090083147391074L; |
| |
| /** |
| * Constructor AccessibleCellRendererPane |
| */ |
| protected AccessibleCellRendererPane() |
| { |
| // Nothing to do here. |
| } |
| |
| /** |
| * getAccessibleRole |
| * @return AccessibleRole |
| */ |
| public AccessibleRole getAccessibleRole() |
| { |
| return AccessibleRole.PANEL; |
| } |
| } |
| |
| /** |
| * accessibleContext |
| */ |
| protected AccessibleContext accessibleContext = null; |
| |
| /** |
| * Constructs a new CellRendererPane. |
| */ |
| public CellRendererPane() |
| { |
| setVisible(false); |
| } |
| |
| /** |
| * Should not be called. |
| * |
| * @param graphics not used here |
| */ |
| public void update(Graphics graphics) |
| { |
| //Nothing to do here. |
| } |
| |
| /** |
| * Despite normal behaviour this does <em>not</em> cause the container |
| * to be invalidated. This prevents propagating up the paint tree. |
| */ |
| public void invalidate() |
| { |
| // Overridden to do nothing. |
| } |
| |
| /** |
| * Should not be called. |
| * |
| * @param graphics not used here |
| */ |
| public void paint(Graphics graphics) |
| { |
| // Overridden to do nothing. |
| } |
| |
| /** |
| * Overridden to check if a component is already a child of this Container. |
| * If it's already a child, nothing is done. Otherwise we pass this to |
| * <code>super.addImpl()</code>. |
| * |
| * @param c the component to add |
| * @param constraints not used here |
| * @param index not used here |
| */ |
| protected void addImpl(Component c, Object constraints, int index) |
| { |
| if (!isAncestorOf(c)) |
| { |
| super.addImpl(c, constraints, index); |
| } |
| } |
| |
| /** |
| * Paints the specified component <code>c</code> on the {@link Graphics} |
| * context <code>graphics</code>. The Graphics context is tranlated to |
| * (x,y) and the components bounds are set to (w,h). If |
| * <code>shouldValidate</code> |
| * is set to true, then the component is validated before painting. |
| * |
| * @param graphics the graphics context to paint on |
| * @param c the component to be painted |
| * @param p the parent of the component |
| * @param x the X coordinate of the upper left corner where c should |
| be painted |
| * @param y the Y coordinate of the upper left corner where c should |
| be painted |
| * @param w the width of the components drawing area |
| * @param h the height of the components drawing area |
| * @param shouldValidate if <code>c</code> should be validated before |
| * painting |
| */ |
| public void paintComponent(Graphics graphics, Component c, |
| Container p, int x, int y, int w, int h, |
| boolean shouldValidate) |
| { |
| // reparent c |
| addImpl(c, null, 0); |
| |
| Rectangle oldClip = graphics.getClipBounds(); |
| boolean translated = false; |
| try |
| { |
| // translate to (x,y) |
| graphics.translate(x, y); |
| translated = true; |
| graphics.clipRect(0, 0, w, h); |
| // set bounds of c |
| c.setBounds(0, 0, w, h); |
| |
| // validate if necessary |
| if (shouldValidate) |
| { |
| c.validate(); |
| } |
| |
| // paint component |
| c.paint(graphics); |
| } |
| finally |
| { |
| // untranslate g |
| if (translated) |
| graphics.translate(-x, -y); |
| graphics.setClip(oldClip); |
| } |
| } |
| |
| /** |
| * Paints the specified component <code>c</code> on the {@link Graphics} |
| * context <code>graphics</code>. The Graphics context is tranlated to (x,y) |
| * and the components bounds are set to (w,h). The component is <em>not</em> |
| * validated before painting. |
| * |
| * @param graphics the graphics context to paint on |
| * @param c the component to be painted |
| * @param p the parent of the component |
| * @param x the X coordinate of the upper left corner where c should |
| be painted |
| * @param y the Y coordinate of the upper left corner where c should |
| be painted |
| * @param w the width of the components drawing area |
| * @param h the height of the components drawing area |
| */ |
| public void paintComponent(Graphics graphics, Component c, |
| Container p, int x, int y, int w, int h) |
| { |
| paintComponent(graphics, c, p, x, y, w, h, false); |
| } |
| |
| /** |
| * Paints the specified component <code>c</code> on the {@link Graphics} |
| * context <code>g</code>. The Graphics context is tranlated to (r.x,r.y) and |
| * the components bounds are set to (r.width,r.height). |
| * The component is <em>not</em> |
| * validated before painting. |
| * |
| * @param graphics the graphics context to paint on |
| * @param c the component to be painted |
| * @param p the component on which we paint |
| * @param r the bounding rectangle of c |
| */ |
| public void paintComponent(Graphics graphics, Component c, |
| Container p, Rectangle r) |
| { |
| paintComponent(graphics, c, p, r.x, r.y, r.width, r.height); |
| } |
| |
| /** |
| * getAccessibleContext <em>TODO</em> |
| * @return AccessibleContext |
| */ |
| public AccessibleContext getAccessibleContext() |
| { |
| if (accessibleContext == null) |
| accessibleContext = new AccessibleCellRendererPane(); |
| |
| return accessibleContext; |
| } |
| } |