/*
 *  RapidMiner
 *
 *  Copyright (C) 2001-2011 by Rapid-I and the contributors
 *
 *  Complete list of developers available at our web site:
 *
 *       http://rapid-i.com
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, either version 3 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 Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see http://www.gnu.org/licenses/.
 */
package com.rapidminer.gui.tools;

import java.awt.EventQueue;
import java.awt.event.ActionEvent;

import javax.swing.Action;
import javax.swing.JComponent;
import javax.swing.JSlider;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

/**
 * This class handles the tool tips for JSliders.
 * 
 * @author Santhosh Kumar, Ingo Mierswa
 */
public class ExtendedJSliderToolTips { 

	public static void enableSliderToolTips(final JSlider slider){ 
		slider.addChangeListener(new ChangeListener() { 
			private boolean adjusting = false; 
			private String oldTooltip; 
			public void stateChanged(ChangeEvent e){ 
				if(slider.getModel().getValueIsAdjusting()){ 
					if(!adjusting){ 
						oldTooltip = slider.getToolTipText(); 
						adjusting = true; 
					} 
					slider.setToolTipText(String.valueOf(slider.getValue())); 
					hideToolTip(slider); 
					postToolTip(slider); 
				}else{ 
					hideToolTip(slider); 
					slider.setToolTipText(oldTooltip); 
					adjusting = false; 
					oldTooltip = null; 
				} 
			} 
		}); 
	}
	
    public static void postToolTip(JComponent comp){ 
        Action action = comp.getActionMap().get("postTip"); 
        if (action == null) // no tooltip 
            return; 
        ActionEvent ae = new ActionEvent(comp, ActionEvent.ACTION_PERFORMED, "postTip", EventQueue.getMostRecentEventTime(), 0); 
        action.actionPerformed(ae); 
    } 
 
    public static void hideToolTip(JComponent comp){ 
        Action action = comp.getActionMap().get("hideTip"); 
        if (action == null) // no tooltip 
            return; 
        ActionEvent ae = new ActionEvent(comp, ActionEvent.ACTION_PERFORMED, "hideTip", EventQueue.getMostRecentEventTime(), 0); 
        action.actionPerformed(ae); 
    } 
}