contextmenusource.java

来自「java实现浏览器等本地桌面的功能」· Java 代码 · 共 120 行

/*
 * $Id: ContextMenuSource.java,v 1.4 2005/10/13 08:59:57 kleopatra Exp $
 *
 * Copyright 2004 Sun Microsystems, Inc., 4150 Network Circle,
 * Santa Clara, California 95054, U.S.A. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
package org.jdesktop.swingx.plaf;

import java.awt.event.ActionEvent;
import java.util.HashMap;
import java.util.Map;

import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.ActionMap;
import javax.swing.JComponent;
import javax.swing.UIManager;


/**
 * @author Jeanette Winzenburg
 */
public abstract class ContextMenuSource {

    private Map<String, String> names;

    public abstract String[] getKeys();

    public String getName(String actionKey) {
        return getNames().get(actionKey);
    }

    public abstract void updateActionEnabled(JComponent component, ActionMap map);

    /**
     * returns an ActionMap for usage in default context menues.
     * @param component
     * @return
     */
    public ActionMap createActionMap(JComponent component) {
        ActionMap map = new ActionMap();
        String[] keys = getKeys();
        for (int i = 0; i < keys.length; i++) {
            if (keys[i] != null) {
                Action action = createDelegateAction(component, keys[i]);
                if (action != null) {
                    map.put(keys[i], action);
                }
            }
        }
        return map;
    }

    protected Map<String, String> getNames() {
        if (names == null) {
            names = new HashMap<String, String>();
            initNames(names);
        }
        return names;
    }

    protected String getValue(String key, String defaultValue) {
        String value = UIManager.getString(getResourcePrefix() + key);
        return value != null ? value : defaultValue;
    }

    protected abstract void initNames(Map<String, String> names);
    
    protected abstract String getResourcePrefix();

 
    protected Action createDelegateAction(JComponent component,
            String actionKey) {
        Action action = component.getActionMap().get(actionKey);
        if (action != null) {
         return new DelegateAction(getName(actionKey),
                action, component);
        }
        return null;
    }

    public static class DelegateAction extends AbstractAction {

        private Action delegatee;
        private JComponent target;

        public DelegateAction(String name, Action delegatee, JComponent target) {
            super(name);
            this.delegatee = delegatee;
            this.target = target;
        }

        public void actionPerformed(ActionEvent e) {
            delegatee.actionPerformed(createActionEvent(e));
        }

        private ActionEvent createActionEvent(ActionEvent e) {
            if (target != null) {
                return new ActionEvent(target, e.getID(), e.getActionCommand(), e.getWhen(), e.getModifiers());
            }
            return e;
        }
    }

}