/*
 *  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.Color;
import java.awt.Component;

import javax.swing.DefaultListCellRenderer;
import javax.swing.JLabel;
import javax.swing.JList;

import com.rapidminer.operator.Operator;
import com.rapidminer.operator.OperatorCreationException;
import com.rapidminer.operator.OperatorDescription;
import com.rapidminer.tools.LogService;

/**
 * A renderer for operator list cells that displays the operator's icon and name.
 *
 * @author Helge Homburg, Ingo Mierswa
 */
public class OperatorListCellRenderer extends DefaultListCellRenderer {   

	private static final long serialVersionUID = -4236587258844548010L;
	
    private boolean coloredBackground;
    
    public OperatorListCellRenderer(boolean coloredBackground) {
        this.coloredBackground = coloredBackground;
    }
    
	@Override
	public Component getListCellRendererComponent(JList list,
                                                  Object value,
                                                  int index,
                                                  boolean isSelected,
                                                  boolean cellHasFocus) {
		OperatorDescription operatorDescription	= (OperatorDescription)value;
		Component component = super.getListCellRendererComponent(list, operatorDescription.getName(), index, isSelected, cellHasFocus);
		JLabel label = (JLabel)component;
		try {
			label.setIcon(operatorDescription.getSmallIcon());
		} catch (Exception e) {
			// error --> no icon	
		}
        if (coloredBackground && (!isSelected) && (index % 2 != 0)) {
            label.setBackground(SwingTools.LIGHTEST_BLUE);
        }
//        label.setBorder(BorderFactory.createEmptyBorder(4, 4, 4, 4));
        
        Operator operator = null;
        try {
        	operator = operatorDescription.createOperatorInstance();
        } catch (OperatorCreationException e) {
            // tries to create operator
            LogService.getGlobal().log("Problem during creation of operator instance: " + e.getMessage(), LogService.WARNING);
        }
        String descriptionString = operatorDescription.getLongDescriptionHTML();
        if (descriptionString == null)
        	descriptionString = operatorDescription.getShortDescription();
        StringBuffer toolTipText = new StringBuffer("<b>Description:</b> " + descriptionString);
        label.setToolTipText(SwingTools.transformToolTipText(toolTipText.toString()));
        
        if ((operatorDescription.getDeprecationInfo() != null) || ((operator != null) && (operator.getOperatorDescription().getDeprecationInfo() != null))) {
        	label.setForeground(Color.LIGHT_GRAY);
        }
		return label;     
    }
}