toggleactionpropertychangelistener.java

sun公司的petstore,一个J2ee的示例应用程序.

/*
 * Copyright 2002 Sun Microsystems, Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 *
 * - Redistributions of source code must retain the above copyright
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 * Neither the name of Sun Microsystems, Inc. or the names of
 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any
 * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
 * EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES
 * SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
 * DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN
 * OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR
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 * LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE SOFTWARE,
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 */
package com.sun.j2ee.blueprints.admin.client;

import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeEvent;

import javax.swing.AbstractButton;

/**
 * Added to the Toggle type buttons and menu items so that various components
 * which have been created from a single AbstractItemAction can be in synch
 *
 * @author  Mark Davidson
 */
public class ToggleActionPropertyChangeListener implements
        PropertyChangeListener {

    // Should be a WeakRef since it's unreachable.
    private AbstractButton button;

    public ToggleActionPropertyChangeListener(AbstractButton button) {
        this.button = button;
    }

    public void propertyChange(PropertyChangeEvent evt) {
        String propertyName = evt.getPropertyName();

        if (propertyName.equals("selected")) {
            Boolean selected = (Boolean)evt.getNewValue();
            button.setSelected(selected.booleanValue());
        }

    }
}