chainrenderer.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.tools.LogService;
import edu.udo.cs.yale.tools.Tools;

import java.awt.*;
import java.awt.geom.*;

public abstract class ChainRenderer extends OperatorRenderer {

    private static final int BORDER = 10;

    public abstract Paint getBackground(Dimension d);

    public void drawOperator(Operator op, Graphics2D g) {
	Dimension d = getSize(op,g);
	g.setPaint(getBackground(d));
	g.fillRect(0, 0, (int)d.getWidth(), (int)d.getHeight());
	g.setPaint(Color.black);
	g.setStroke(new BasicStroke(3));
	g.drawRect(0, 0, (int)d.getWidth(), (int)d.getHeight());
	Graphics2D g2 = (Graphics2D)g.create();
	g2.translate(BORDER, BORDER);
	drawName(op, g2);
	g2.dispose();

	double width = d.getWidth();
	double y = 2 * BORDER + getNameSize(op, g).getHeight();

	OperatorChain chain = (OperatorChain)op;	
	for (int i = 0; i < chain.getNumberOfOperators(); i++) {
	    Operator innerOp = chain.getOperator(i);
	    OperatorRenderer renderer = ExperimentRenderer.getRenderer(innerOp);

	    Dimension innerSize = renderer.getSize(innerOp, g);
	    Graphics2D gn = (Graphics2D)g.create((int)(width/2 - innerSize.getWidth()/2), 
						 (int)y, 
						 (int)innerSize.getWidth(), 
						 (int)innerSize.getHeight());
	    renderer.drawOperator(innerOp, gn);
	    gn.dispose();
	    y += innerSize.getHeight() + BORDER;
	}

    }

    public Dimension getSize(Operator operator, Graphics2D g) {
	Dimension d = getNameSize(operator, g);

	OperatorChain chain = (OperatorChain)operator;
	double width  = d.getWidth();
	double height = d.getHeight() + BORDER;
	for (int i = 0; i < chain.getNumberOfOperators(); i++) {
	    Operator innerOp = chain.getOperator(i);
	    OperatorRenderer renderer = ExperimentRenderer.getRenderer(innerOp);
	    Dimension innerSize = renderer.getSize(innerOp, g);
	    width  = Math.max(width, innerSize.getWidth());
	    height += innerSize.getHeight() + BORDER;
	}

	return new Dimension((int)width+2*BORDER, (int)height+BORDER);
    }

}