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