statusbar.java

一个很好的LIBSVM的JAVA源码。对于要研究和改进SVM算法的学者。可以参考。来自数据挖掘工具YALE工具包。

/*
 *  YALE - Yet Another Learning Environment
 *  Copyright (C) 2001-2004
 *      Simon Fischer, Ralf Klinkenberg, Ingo Mierswa, 
 *          Katharina Morik, Oliver Ritthoff
 *      Artificial Intelligence Unit
 *      Computer Science Department
 *      University of Dortmund
 *      44221 Dortmund,  Germany
 *  email: [e-mail]
 *  web:   http://yale.cs.uni-dortmund.de/
 *
 *  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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 *  USA.
 */
package edu.udo.cs.yale.gui;

import edu.udo.cs.yale.Yale;
import edu.udo.cs.yale.Experiment;
import edu.udo.cs.yale.ExperimentListener;
import edu.udo.cs.yale.operator.ExperimentOperator;
import edu.udo.cs.yale.operator.Operator;

import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.border.Border;
import java.awt.Font;
import java.awt.FlowLayout;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Insets;
import java.awt.Color;


public class StatusBar extends Box implements ExperimentListener {

    private JLabel clock    = createLabel(getTime(), true);
    private JLabel operator = createLabel("                         ", true);
    private Operator currentOperator = null;

    public StatusBar() {
	super(BoxLayout.X_AXIS);

	operator.setPreferredSize(new java.awt.Dimension(500,8));
	add(operator);
	add(createHorizontalGlue());
	add(clock);

	new Thread() {
		public void run() {
		    setPriority(MIN_PRIORITY);
		    while (true) {
			try {
			    clock.setText(getTime());
			    if (currentOperator != null) {
				long execTime = System.currentTimeMillis() - currentOperator.getStartTime();
				if (execTime > 1000) {
				    operator.setText("["+currentOperator.getApplyCount() + "] "+
						     currentOperator.getName()+"  "+(execTime/1000)+" s");
				}
			    }
			    sleep(1000);
			} catch (InterruptedException e) {
			    e.printStackTrace();
			    return;
			}
		    }
		}
	    }.start();
    }

    private static Border createBorder() {
	return new Border() {
		public void paintBorder(Component c, Graphics g, int x, int y, int w, int h) {
		    Color highlight = c.getBackground().brighter().brighter();
		    Color shadow    = c.getBackground().darker().darker();
		    Color oldColor = g.getColor();
		    g.translate(x, y);
		    g.setColor(shadow);
		    g.drawLine(3,   0,   3,   h-2);
		    g.drawLine(3,   0,   w-3, 0);
		    g.setColor(highlight);
		    g.drawLine(3,   h-2, w-3, h-2);
		    g.drawLine(w-3, 1,   w-3, h-2);
		    g.translate(-x, -y);
		    g.setColor(oldColor);
		}
		public Insets getBorderInsets(Component c) { return new Insets(1, 4, 2, 3); }
		public boolean isBorderOpaque() { return false; }
	    };
    }
    
    private static JLabel createLabel(String text, boolean border) {
	JLabel label = new JLabel(text);
	if (border) {
	    label.setBorder(createBorder());
	}
	label.setFont(label.getFont().deriveFont(Font.PLAIN));
	return label;
    }
    
    private static String getTime() {
	return java.text.DateFormat.getTimeInstance().format(new java.util.Date());
    }
    
    public void experimentStep(ExperimentOperator op) {
	currentOperator = op.getExperiment().getCurrentOperator();
	operator.setText("["+currentOperator.getApplyCount() + "] " + currentOperator.getName());
    }
    
    public void experimentEnded() {
	operator.setText(" ");
	currentOperator = null;
    }
}