experimentrenderer.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.operator.Operator;
import edu.udo.cs.yale.operator.OperatorChain;
import edu.udo.cs.yale.operator.ExperimentOperator;
import edu.udo.cs.yale.operator.SimpleOperatorChain;

import java.awt.*;
import java.awt.geom.*;
import javax.swing.*;

/** A pure renderer that cannot (yet) edit the experiment. Can be used for printing. */
public class ExperimentRenderer extends JPanel implements ExperimentEditor {

    private Operator operator;

    private static OperatorRenderer leafRenderer = new LeafRenderer();
    private static OperatorRenderer chainRenderer = new SimpleChainRenderer();
    private static OperatorRenderer wrapperRenderer = new WrapperRenderer();

    public ExperimentRenderer() {
    }

    public void experimentChanged(Operator operator) {
	setOperator(operator);
    }

    public void setOperator(Operator operator) {
	this.operator = operator;
	repaint();
    }

    public void paint(Graphics g) {
	if (operator == null) {
	    return;
	}	
	g.clearRect(0,0,getWidth(), getHeight());

	Graphics2D g2d = (Graphics2D)g;

	Dimension size = getRenderer(operator).getSize(operator, g2d);
	Dimension dimension = new Dimension((int)size.getWidth()+20, (int)size.getHeight()+20);
	setMinimumSize(dimension);
	setPreferredSize(dimension);
	//setMaximumSize(dimension);

	g2d.translate(getWidth()/2 - size.getWidth()/2,10);
	getRenderer(operator).drawOperator(operator, g2d);
    }

    public void print(Graphics g) {
	if (operator == null) {
	    return;
	}	
	Graphics2D g2d = (Graphics2D)g;
	getRenderer(operator).drawOperator(operator, g2d);
    }
 
    public static OperatorRenderer getRenderer(Operator op) {
	if (op instanceof OperatorChain) {
	    if ((op instanceof SimpleOperatorChain) ||
		(op instanceof ExperimentOperator))
		return chainRenderer;
	    else 
		return wrapperRenderer;
	}
	else return leafRenderer;
    }

    public Component getMainComponent() {
	return this;
    }

    public void validateExperiment() {}
}