SiLeBAT/FSK-Lab

/*******************************************************************************
 * Copyright (c) 2015 Federal Institute for Risk Assessment (BfR), Germany
 *
 * 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 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Contributors:
 *     Department Biological Safety - BfR
 *******************************************************************************/
package de.bund.bfr.knime.foodprocess.view;

import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JLabel;
import javax.swing.SwingConstants;

public class ProcessLegendElement extends JLabel implements ActionListener {

    /**
     * 
     */
    private static final long serialVersionUID = -160476636400024276L;
    private ViewUi vui;
    
    public ProcessLegendElement(String processName, Color color, ViewUi vui) {
        this.vui = vui;
        this.setOpaque(true);
        //this.setSelected(true);
        this.setBackground(color);
        this.setForeground(getForeGroundColorBasedOnBGBrightness(color));
        this.setText(processName);
        this.setHorizontalAlignment(SwingConstants.LEFT);
        //this.addActionListener(this);
    }

    @Override
    public void actionPerformed(ActionEvent arg0) {
        if (vui != null) {
            vui.checkBoxChecked(null);
        }
    }
    
    private Color getForeGroundColorBasedOnBGBrightness(Color color) {
        if (color == null) return Color.BLACK;
        if (getBrightness(color) < 130) return Color.WHITE;
        else return Color.BLACK;
    }    
    private int getBrightness(Color c) {
        return (int) Math.sqrt(
          c.getRed() * c.getRed() * .241 +
          c.getGreen() * c.getGreen() * .691 +
          c.getBlue() * c.getBlue() * .068);
    }
}