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/* ========================================================================
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* JCommon : a free general purpose class library for the Java(tm) platform
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* ========================================================================
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* (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
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* Project Info: http://www.jfree.org/jcommon/index.html
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* This library is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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* License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
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* in the United States and other countries.]
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* (C)opyright 2002-2004, by Thomas Morgner and Contributors.
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* Original Author: Thomas Morgner;
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* Contributor(s): David Gilbert (for Object Refinery Limited);
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* $Id: ActionButton.java,v 1.5 2005/10/18 13:22:13 mungady Exp $
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* 30-Aug-2002 : Initial version
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* 01-Sep-2002 : Documentation
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* 10-Dec-2002 : Minor Javadoc updates (DG);
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* 07-Jun-2004 : Corrected source headers (DG);
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package org.jfree.ui.action;
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import java.beans.PropertyChangeEvent;
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import java.beans.PropertyChangeListener;
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import javax.swing.Action;
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import javax.swing.Icon;
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import javax.swing.JButton;
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import javax.swing.KeyStroke;
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import org.jfree.util.Log;
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* The ActionButton is used to connect an Action and its properties to a Button. This functionality
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* is already implemented in JDK 1.3 but needed for JDK 1.2.2 compatibility.
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* @author Thomas Morgner
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public class ActionButton extends JButton {
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private Action action;
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* The property change handler.
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private ActionEnablePropertyChangeHandler propertyChangeHandler;
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* Helperclass to handle the property change event raised by the action. Changed properties in
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* the action will affect the button.
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private class ActionEnablePropertyChangeHandler implements PropertyChangeListener {
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* Default constructor.
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public ActionEnablePropertyChangeHandler() {
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* Receives notification of a property change event.
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* @param event the property change event.
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public void propertyChange(final PropertyChangeEvent event) {
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if (event.getPropertyName().equals("enabled")) {
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setEnabled(getAction().isEnabled());
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else if (event.getPropertyName().equals(Action.SMALL_ICON)) {
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setIcon((Icon) getAction().getValue(Action.SMALL_ICON));
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else if (event.getPropertyName().equals(Action.NAME)) {
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setText((String) getAction().getValue
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else if (event.getPropertyName().equals(Action.SHORT_DESCRIPTION)) {
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ActionButton.this.setToolTipText((String)
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getAction().getValue(Action.SHORT_DESCRIPTION));
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final Action ac = getAction();
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if (event.getPropertyName().equals(ActionDowngrade.ACCELERATOR_KEY)) {
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final KeyStroke oldVal = (KeyStroke) event.getOldValue();
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if (oldVal != null) {
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unregisterKeyboardAction
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final Object o = ac.getValue(ActionDowngrade.ACCELERATOR_KEY);
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if (o instanceof KeyStroke) {
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final KeyStroke k = (KeyStroke) o;
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registerKeyboardAction(ac, k, WHEN_IN_FOCUSED_WINDOW);
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else if (event.getPropertyName().equals(ActionDowngrade.MNEMONIC_KEY)) {
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final Object o = ac.getValue(ActionDowngrade.MNEMONIC_KEY);
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if (o instanceof Character) {
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final Character c = (Character) o;
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setMnemonic(c.charValue());
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else if (o instanceof Integer) {
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final Integer c = (Integer) o;
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setMnemonic(c.intValue());
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catch (Exception e) {
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Log.warn("Error on PropertyChange in ActionButton: ", e);
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* Creates a Button without any text and without an assigned Action.
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public ActionButton() {
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* Creates a Button and set the given text as label.
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* @param text the label for the new button.
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public ActionButton(final String text) {
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* Creates an ActionButton and sets the given text and icon on the button.
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* @param text the label for the new button.
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* @param icon the icon for the button.
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public ActionButton(final String text, final Icon icon) {
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* Creates an ActionButton and sets the given icon on the button.
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* @param icon the icon for the button.
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public ActionButton(final Icon icon) {
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* Nreates an ActionButton and assigns the given action with the button.
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* @param action the action.
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public ActionButton(final Action action) {
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* Returns the assigned action or null if no action has been assigned.
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* @return the action (possibly null).
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public Action getAction() {
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* Returns and initializes the PropertyChangehandler for this ActionButton.
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* The PropertyChangeHandler monitors the action and updates the button if necessary.
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* @return the property change handler.
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private ActionEnablePropertyChangeHandler getPropertyChangeHandler() {
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if (this.propertyChangeHandler == null) {
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this.propertyChangeHandler = new ActionEnablePropertyChangeHandler();
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return this.propertyChangeHandler;
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* Enables and disables this button and if an action is assigned to this button the
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* propertychange is forwarded to the assigned action.
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* @param b the new enable-state of this button
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public void setEnabled(final boolean b) {
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if (getAction() != null) {
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getAction().setEnabled(b);
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* Assigns the given action to this button. The properties of the action will be assigned to
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* the button. If an previous action was set, the old action is unregistered.
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* <li>NAME - specifies the button text
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* <li>SMALL_ICON - specifies the buttons icon
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* <li>MNEMONIC_KEY - specifies the buttons mnemonic key
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* <li>ACCELERATOR_KEY - specifies the buttons accelerator
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* @param newAction the new action
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public void setAction(final Action newAction) {
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final Action oldAction = getAction();
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if (oldAction != null) {
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removeActionListener(oldAction);
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oldAction.removePropertyChangeListener(getPropertyChangeHandler());
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final Object o = oldAction.getValue(ActionDowngrade.ACCELERATOR_KEY);
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if (o instanceof KeyStroke) {
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final KeyStroke k = (KeyStroke) o;
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unregisterKeyboardAction(k);
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this.action = newAction;
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if (this.action != null) {
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addActionListener(newAction);
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newAction.addPropertyChangeListener(getPropertyChangeHandler());
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setText((String) (newAction.getValue(Action.NAME)));
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setToolTipText((String) (newAction.getValue(Action.SHORT_DESCRIPTION)));
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setIcon((Icon) newAction.getValue(Action.SMALL_ICON));
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setEnabled(this.action.isEnabled());
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Object o = newAction.getValue(ActionDowngrade.MNEMONIC_KEY);
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if (o instanceof Character) {
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final Character c = (Character) o;
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setMnemonic(c.charValue());
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else if (o instanceof Integer) {
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final Integer c = (Integer) o;
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setMnemonic(c.intValue());
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o = newAction.getValue(ActionDowngrade.ACCELERATOR_KEY);
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if (o instanceof KeyStroke) {
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final KeyStroke k = (KeyStroke) o;
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registerKeyboardAction(newAction, k, WHEN_IN_FOCUSED_WINDOW);