textutilitiespopupmenu.java

eq跨平台查询工具源码 eq跨平台查询工具源码

/*
 * TextUtilitiesPopUpMenu.java
 *
 * Copyright (C) 2002, 2003, 2004, 2005, 2006 Takis Diakoumis
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or any later version.
 *
 * This program 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */


package org.executequery.gui.text;

import java.awt.event.ActionEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.Action;

import javax.swing.JMenuItem;
import javax.swing.JPopupMenu;
import javax.swing.KeyStroke;
import javax.swing.text.JTextComponent;

import org.underworldlabs.swing.actions.ActionBuilder;
import org.underworldlabs.swing.actions.ReflectiveAction;

/* ----------------------------------------------------------
 * CVS NOTE: Changes to the CVS repository prior to the 
 *           release of version 3.0.0beta1 has meant a 
 *           resetting of CVS revision numbers.
 * ----------------------------------------------------------
 */

/** 
 * The text utilities popup menu function
 *
 * @author   Takis Diakoumis
 * @version  $Revision: 1.4 $
 * @date     $Date: 2006/05/14 06:56:52 $
 */
public class TextUtilitiesPopUpMenu extends JPopupMenu {
    
    /** the action listener */
    private ReflectiveAction reflectiveAction;

    /** the text component this popup belongs to */
    private JTextComponent textComponent;
    
    public TextUtilitiesPopUpMenu() {
        
        // create the listener
        reflectiveAction = new ReflectiveAction(this);

        // the menu label text
        String[] menuLabels = {"Cut", "Copy", "Paste"};
        
        // cached actions from which to retrieve common accels and mnemonics
        String[] actionNames = {"cut-command", "copy-command", "paste-command"};
        
        // action command settings to map to method names in this class
        String[] actionCommands = {"cut", "copy", "paste"};
        
        for (int i = 0; i < menuLabels.length; i++) {
            add(createMenuItem(menuLabels[i], actionNames[i], actionCommands[i]));
        }

    }
    
    /**
     * Executes the cut action on the registered text component.
     */
    public void cut(ActionEvent e) {
        textComponent.cut();
    }

    /**
     * Executes the copy action on the registered text component.
     */
    public void copy(ActionEvent e) {
        textComponent.copy();
    }

    /**
     * Executes the paste action on the registered text component.
     */
    public void paste(ActionEvent e) {
        textComponent.paste();
    }

    private JMenuItem createMenuItem(String text, 
                                     String actionName, 
                                     String actionCommand) {
        JMenuItem menuItem = new JMenuItem(text);
        Action action = ActionBuilder.get(actionName);
        Object object = action.getValue(Action.ACCELERATOR_KEY);
        if (object != null) {
            menuItem.setAccelerator((KeyStroke)object);
        }
        object = action.getValue(Action.MNEMONIC_KEY);
        if (object != null) {
            menuItem.setMnemonic(((Integer)object).intValue());
        }
        menuItem.setActionCommand(actionCommand);
        menuItem.addActionListener(reflectiveAction);
        return menuItem;
    }
    
    public void registerTextComponent(JTextComponent textComponent) {
        this.textComponent = textComponent;
        textComponent.addMouseListener(new PopupListener(this));
    }
    
    class PopupListener extends MouseAdapter {
        
        private JPopupMenu popup;
        
        public PopupListener(JPopupMenu popup) {
            this.popup = popup;
        }
        
        public void mousePressed(MouseEvent e) {
            maybeShowPopup(e);
        }
        
        public void mouseReleased(MouseEvent e) {
            maybeShowPopup(e);
        }
        
        private void maybeShowPopup(MouseEvent e) {
            if (e.isPopupTrigger()) {
                popup.show(e.getComponent(), e.getX(), e.getY());
            }
        }
        
    } // class PopupListener
    
}