toleranceslider.java

eclispse下运行 模拟退火算法的java源代码

package org.theblueplanet.annealing.ui;

import javax.swing.JSlider;

import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

import org.apache.log4j.Logger;

import org.theblueplanet.annealing.AnnealingScheme;

/**
 *  Description of the Class
 *
 * @author     Charles M間nin
 * @since    October 29, 2001
 * @version    1.0
 */
public class ToleranceSlider extends JSlider {
    private AnnealingScheme scheme;
    private AnnealingPanel parent;
    private final static int minValue  = -20;
    private final static int maxValue  = -1;
    private static Logger logger = Logger.getLogger("org.theblueplanet.annealing");

    /**
     *  Constructor for the ToleranceSlider object
     *
     * @param  parent  The AnnealingPanel that instantiated the ToleranceSlider
     * @param  scheme  The Object that encapsulates the annealing parameters
     */
    public ToleranceSlider(AnnealingPanel parent, AnnealingScheme scheme) {
        super(JSlider.HORIZONTAL, minValue, maxValue, (int) Math.round(Math.log(scheme.getTolerance()) / Math.log(10)));
        logger.debug("Instantiating " + this.getClass().getName());
        this.scheme = scheme;
        this.parent = parent;
        init();
    }

    /**
     *  Sets parameters and adds Listener
     */
    private void init() {
        this.setMajorTickSpacing(2);
        this.setPaintTicks(true);
        this.setPaintLabels(true);
        this.addChangeListener(new SliderListener());
        this.setToolTipText("Log10 of convergence criterion (-20: lowest tolerance/slow | -1: highest tolerance/fast)");
    }

    /**
     *  Listens to the slider.
     */
    private class SliderListener implements ChangeListener {
        public void stateChanged(ChangeEvent e) {
            JSlider source  = (JSlider) e.getSource();
            if (!source.getValueIsAdjusting()) {
                double value  = (double) source.getValue();
                scheme.setTolerance(Math.pow(10, value));
                parent.updateSummaryPanel(scheme);
            }
        }
    }

}