/* * Copyright (c) 1997, 2003, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code 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 * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */package javax.swing; import java.awt.*;import java.awt.event.*;import java.io.*;import java.beans.PropertyChangeListener;import java.util.Locale;import java.util.Vector; import javax.accessibility.*; /** * This class is inserted in between cell renderers and the components that * use them. It just exists to thwart the repaint() and invalidate() methods * which would otherwise propagate up the tree when the renderer was configured. * It's used by the implementations of JTable, JTree, and JList. For example, * here's how CellRendererPane is used in the code the paints each row * in a JList: * <pre> * cellRendererPane = new CellRendererPane(); * ... * Component rendererComponent = renderer.getListCellRendererComponent(); * renderer.configureListCellRenderer(dataModel.getElementAt(row), row); * cellRendererPane.paintComponent(g, rendererComponent, this, x, y, w, h); * </pre> * <p> * A renderer component must override isShowing() and unconditionally return * true to work correctly because the Swing paint does nothing for components * with isShowing false. * <p> * <strong>Warning:</strong> * Serialized objects of this class will not be compatible with * future Swing releases. The current serialization support is * appropriate for short term storage or RMI between applications running * the same version of Swing. As of 1.4, support for long term storage * of all JavaBeans<sup><font size="-2">TM</font></sup> * has been added to the <code>java.beans</code> package. * Please see {@link java.beans.XMLEncoder}. * * @author Hans Muller */public class CellRendererPane extends Container implements Accessible{ /** * Construct a CellRendererPane object. */ public CellRendererPane() { super(); setLayout(null); setVisible(false); } /** * Overridden to avoid propagating a invalidate up the tree when the * cell renderer child is configured. */ public void invalidate() { } /** * Shouldn't be called. */ public void paint(Graphics g) { } /** * Shouldn't be called. */ public void update(Graphics g) { } /** * If the specified component is already a child of this then we don't * bother doing anything - stacking order doesn't matter for cell * renderer components (CellRendererPane doesn't paint anyway).< */ protected void addImpl(Component x, Object constraints, int index) { if (x.getParent() == this) { return; } else { super.addImpl(x, constraints, index); } } /** * Paint a cell renderer component c on graphics object g. Before the component * is drawn it's reparented to this (if that's necessary), it's bounds * are set to w,h and the graphics object is (effectively) translated to x,y. * If it's a JComponent, double buffering is temporarily turned off. After * the component is painted it's bounds are reset to -w, -h, 0, 0 so that, if * it's the last renderer component painted, it will not start consuming input. * The Container p is the component we're actually drawing on, typically it's * equal to this.getParent(). If shouldValidate is true the component c will be * validated before painted. */ public void paintComponent(Graphics g, Component c, Container p, int x, int y, int w, int h, boolean shouldValidate) { if (c == null) { if (p != null) { Color oldColor = g.getColor(); g.setColor(p.getBackground()); g.fillRect(x, y, w, h); g.setColor(oldColor); } return; } if (c.getParent() != this) { this.add(c); } c.setBounds(x, y, w, h); if(shouldValidate) { c.validate(); } boolean wasDoubleBuffered = false; if ((c instanceof JComponent) && ((JComponent)c).isDoubleBuffered()) { wasDoubleBuffered = true; ((JComponent)c).setDoubleBuffered(false); } Graphics cg = g.create(x, y, w, h); try { c.paint(cg); } finally { cg.dispose(); } if (wasDoubleBuffered && (c instanceof JComponent)) { ((JComponent)c).setDoubleBuffered(true); } c.setBounds(-w, -h, 0, 0); } /** * Calls this.paintComponent(g, c, p, x, y, w, h, false). */ public void paintComponent(Graphics g, Component c, Container p, int x, int y, int w, int h) { paintComponent(g, c, p, x, y, w, h, false); } /** * Calls this.paintComponent() with the rectangles x,y,width,height fields. */ public void paintComponent(Graphics g, Component c, Container p, Rectangle r) { paintComponent(g, c, p, r.x, r.y, r.width, r.height); } private void writeObject(ObjectOutputStream s) throws IOException { removeAll(); s.defaultWriteObject(); } /////////////////// Accessibility support//////////////// protected AccessibleContext accessibleContext = null; /** * Gets the AccessibleContext associated with this CellRendererPane. * For CellRendererPanes, the AccessibleContext takes the form of an * AccessibleCellRendererPane. * A new AccessibleCellRendererPane instance is created if necessary. * * @return an AccessibleCellRendererPane that serves as the * AccessibleContext of this CellRendererPane */ public AccessibleContext getAccessibleContext() { if (accessibleContext == null) { accessibleContext = new AccessibleCellRendererPane(); } return accessibleContext; } /** * This class implements accessibility support for the * <code>CellRendererPane</code> class. */ protected class AccessibleCellRendererPane extends AccessibleAWTContainer { // AccessibleContext methods // /** * Get the role of this object. * * @return an instance of AccessibleRole describing the role of the * object * @see AccessibleRole */ public AccessibleRole getAccessibleRole() { return AccessibleRole.PANEL; } } // inner class AccessibleCellRendererPane}
/*
* Copyright (c) 1997, 2003, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package javax.swing;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.beans.PropertyChangeListener;
import java.util.Locale;
import java.util.Vector;
import javax.accessibility.*;
/**
* This class is inserted in between cell renderers and the components that
* use them. It just exists to thwart the repaint() and invalidate() methods
* which would otherwise propagate up the tree when the renderer was configured.
* It's used by the implementations of JTable, JTree, and JList. For example,
* here's how CellRendererPane is used in the code the paints each row
* in a JList:
* <pre>
* cellRendererPane = new CellRendererPane();
* ...
* Component rendererComponent = renderer.getListCellRendererComponent();
* renderer.configureListCellRenderer(dataModel.getElementAt(row), row);
* cellRendererPane.paintComponent(g, rendererComponent, this, x, y, w, h);
* </pre>
* <p>
* A renderer component must override isShowing() and unconditionally return
* true to work correctly because the Swing paint does nothing for components
* with isShowing false.
* <p>
* <strong>Warning:</strong>
* Serialized objects of this class will not be compatible with
* future Swing releases. The current serialization support is
* appropriate for short term storage or RMI between applications running
* the same version of Swing. As of 1.4, support for long term storage
* of all JavaBeans<sup><font size="-2">TM</font></sup>
* has been added to the <code>java.beans</code> package.
* Please see {@link java.beans.XMLEncoder}.
*
* @author Hans Muller
*/
public class CellRendererPane extends Container implements Accessible
{
/**
* Construct a CellRendererPane object.
*/
public CellRendererPane() {
super();
setLayout(null);
setVisible(false);
}
/**
* Overridden to avoid propagating a invalidate up the tree when the
* cell renderer child is configured.
*/
public void invalidate() { }
/**
* Shouldn't be called.
*/
public void paint(Graphics g) { }
/**
* Shouldn't be called.
*/
public void update(Graphics g) { }
/**
* If the specified component is already a child of this then we don't
* bother doing anything - stacking order doesn't matter for cell
* renderer components (CellRendererPane doesn't paint anyway).<
*/
protected void addImpl(Component x, Object constraints, int index) {
if (x.getParent() == this) {
return;
}
else {
super.addImpl(x, constraints, index);
}
}
/**
* Paint a cell renderer component c on graphics object g. Before the component
* is drawn it's reparented to this (if that's necessary), it's bounds
* are set to w,h and the graphics object is (effectively) translated to x,y.
* If it's a JComponent, double buffering is temporarily turned off. After
* the component is painted it's bounds are reset to -w, -h, 0, 0 so that, if
* it's the last renderer component painted, it will not start consuming input.
* The Container p is the component we're actually drawing on, typically it's
* equal to this.getParent(). If shouldValidate is true the component c will be
* validated before painted.
*/
public void paintComponent(Graphics g, Component c, Container p, int x, int y, int w, int h, boolean shouldValidate) {
if (c == null) {
if (p != null) {
Color oldColor = g.getColor();
g.setColor(p.getBackground());
g.fillRect(x, y, w, h);
g.setColor(oldColor);
}
return;
}
if (c.getParent() != this) {
this.add(c);
}
c.setBounds(x, y, w, h);
if(shouldValidate) {
c.validate();
}
boolean wasDoubleBuffered = false;
if ((c instanceof JComponent) && ((JComponent)c).isDoubleBuffered()) {
wasDoubleBuffered = true;
((JComponent)c).setDoubleBuffered(false);
}
Graphics cg = g.create(x, y, w, h);
try {
c.paint(cg);
}
finally {
cg.dispose();
}
if (wasDoubleBuffered && (c instanceof JComponent)) {
((JComponent)c).setDoubleBuffered(true);
}
c.setBounds(-w, -h, 0, 0);
}
/**
* Calls this.paintComponent(g, c, p, x, y, w, h, false).
*/
public void paintComponent(Graphics g, Component c, Container p, int x, int y, int w, int h) {
paintComponent(g, c, p, x, y, w, h, false);
}
/**
* Calls this.paintComponent() with the rectangles x,y,width,height fields.
*/
public void paintComponent(Graphics g, Component c, Container p, Rectangle r) {
paintComponent(g, c, p, r.x, r.y, r.width, r.height);
}
private void writeObject(ObjectOutputStream s) throws IOException {
removeAll();
s.defaultWriteObject();
}
/////////////////
// Accessibility support
////////////////
protected AccessibleContext accessibleContext = null;
/**
* Gets the AccessibleContext associated with this CellRendererPane.
* For CellRendererPanes, the AccessibleContext takes the form of an
* AccessibleCellRendererPane.
* A new AccessibleCellRendererPane instance is created if necessary.
*
* @return an AccessibleCellRendererPane that serves as the
* AccessibleContext of this CellRendererPane
*/
public AccessibleContext getAccessibleContext() {
if (accessibleContext == null) {
accessibleContext = new AccessibleCellRendererPane();
}
return accessibleContext;
}
/**
* This class implements accessibility support for the
* <code>CellRendererPane</code> class.
*/
protected class AccessibleCellRendererPane extends AccessibleAWTContainer {
// AccessibleContext methods
//
/**
* Get the role of this object.
*
* @return an instance of AccessibleRole describing the role of the
* object
* @see AccessibleRole
*/
public AccessibleRole getAccessibleRole() {
return AccessibleRole.PANEL;
}
} // inner class AccessibleCellRendererPane
}