/*
 *    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
 *    (at your option) 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/*
 * Created on 2005/7/27
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
package eti.bi.alphaminer.jhelpcomponent;

import java.awt.Cursor;
import java.awt.LayoutManager;
import java.awt.event.MouseListener;
import java.awt.event.MouseEvent;

import javax.swing.JPanel;

import eti.bi.alphaminer.core.observer.HelpObserver;
import eti.bi.alphaminer.core.observer.HelpObserveSubject;

/**
 * @author tyleung
 *
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Style - Code Templates
 */

public class JHelpPanel extends JPanel implements MouseListener, HelpObserver {
    /**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	private boolean m_HelpState;
    
    public JHelpPanel() {
        setHelpState(false);
        addMouseListener(this);
        HelpObserveSubject.registerInterest(this);
    }
    
    public JHelpPanel(LayoutManager layout) {
        super(layout);
        setHelpState(false);
        addMouseListener(this);
    }
    
	public void Update(boolean a_HelpState) {
        setHelpMode(a_HelpState);
	}
	
	private void setHelpMode(boolean a_HelpState) {
	    HelpCursor helpCursor = new HelpCursor();
	    
	    if ( a_HelpState )
	        setCursor(helpCursor.getCursor());
	    else
	        setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
	    
	    setHelpState(a_HelpState);
	}
	
	private void setHelpState(boolean a_HelpState) {
	    m_HelpState = a_HelpState;
	}
	
	private boolean isHelpMode() {
	    return m_HelpState;
	}
    
	/**
	 * @see java.awt.event.MouseListener#mouseEntered(MouseEvent)
	 */
	public void mouseEntered(MouseEvent e) {
	}
	
	/**
	 * @see java.awt.event.MouseListener#mouseExited(MouseEvent)
	 */
	public void mouseExited(MouseEvent e) {
	}
	
	/**
	 * @see java.awt.event.MouseListener#mousePressed(MouseEvent)
	 */
	public void mousePressed(MouseEvent e) {
	    if ( isHelpMode() ) {
	        setHelpMode(false);
	        HelpObserveSubject.sendNotify(false);
	    }
	}
	
	/**
	 * @see java.awt.event.MouseListener#mouseReleased(MouseEvent)
	 */
	public void mouseReleased(MouseEvent e) {
	}
	
	/**
	 * @see java.awt.event.MouseListener#mouseClicked(MouseEvent)
	 */
	public void mouseClicked(MouseEvent e) {
	}
}