stripchart.java

wekaUT是 university texas austin 开发的基于weka的半指导学习(semi supervised learning)的分类器

/*
 *    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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/*
 *    StripChart.java
 *    Copyright (C) 2002 Mark Hall
 *
 */

package weka.gui.beans;

import javax.swing.JPanel;
import java.awt.Image;
import java.awt.Graphics;
import java.awt.BorderLayout;
import java.awt.Color;
import java.util.Random;
import java.awt.image.CropImageFilter;
import java.awt.image.FilteredImageSource;
import javax.swing.JFrame;
import java.util.Vector;
import java.awt.Font;
import java.awt.FontMetrics;
import javax.swing.JLabel;
import java.awt.Dimension;
import javax.swing.BorderFactory;
import javax.swing.border.TitledBorder;
import javax.swing.border.EtchedBorder;
import java.util.LinkedList;
import java.io.ObjectInputStream;
import java.io.IOException;
import java.util.Enumeration;
import java.io.Serializable;

import weka.core.Queue;

/**
 * Bean that can display a horizontally scrolling strip chart. Can
 * display multiple plots simultaneously
 *
 * @author <a href="mailto:[e-mail]">Mark Hall</a>
 * @version $Revision: 1.1.1.1 $
 */
public class StripChart 
  extends JPanel 
  implements ChartListener, Visible, 
	     BeanCommon, UserRequestAcceptor, 
	     Serializable {
  
  /** default colours for colouring lines */
  protected Color [] m_colorList = {Color.green,
				    Color.red,
				    Color.blue,
				    Color.cyan,
				    Color.pink,
				    new Color(255, 0, 255),
				    Color.orange,
				    new Color(255, 0, 0),
				    new Color(0, 255, 0),
				    Color.white};

  // Class providing a panel for the plot
  private class StripPlotter extends JPanel {
    public void paintComponent(Graphics g) {
      super.paintComponent(g);
      if (m_osi != null) {
	g.drawImage(m_osi,0,0,this);
      }
    }
  }

  private transient JFrame m_outputFrame = null;
  private transient StripPlotter m_plotPanel = null;

  /**
   * The off screen image for rendering to
   */
  private transient Image m_osi = null;
  
  /**
   * Width and height of the off screen image
   */
  private int m_iheight;
  private int m_iwidth;

  /**
   * Max value for the y axis
   */
  private double m_max = 1;

  /**
   * Min value for the y axis
   */
  private double m_min = 0;

  /**
   * Scale update requested
   */
  private boolean m_yScaleUpdate = false;
  private double m_oldMax;
  private double m_oldMin;

  private Font m_labelFont = new Font("Monospaced", Font.PLAIN, 10);
  private FontMetrics m_labelMetrics;

  //  private int m_plotCount = 0;

  private Vector m_legendText = new Vector();

  /**
   * Class providing a panel for displaying the y axis
   */
  private JPanel m_scalePanel = new JPanel() {
      public void paintComponent(Graphics gx) {
	super.paintComponent(gx);
	if (m_labelMetrics == null) {
	  m_labelMetrics = gx.getFontMetrics(m_labelFont);
	}
	gx.setFont(m_labelFont);
	int hf = m_labelMetrics.getAscent();
	String temp = ""+m_max;
	gx.setColor(m_colorList[m_colorList.length-1]);
	gx.drawString(temp, 1, hf-2);
	temp = ""+(m_min + ((m_max - m_min)/2.0));
	gx.drawString(temp, 1, (this.getHeight() / 2)+(hf / 2));
	temp = ""+m_min;
	gx.drawString(temp, 1, this.getHeight()-1);
      }
    };

  /**
   * Class providing a panel for the legend
   */
  private JPanel m_legendPanel = new JPanel() {
      public void paintComponent(Graphics gx) {
	super.paintComponent(gx);

	if (m_labelMetrics == null) {
	  m_labelMetrics = gx.getFontMetrics(m_labelFont);
	}
	int hf = m_labelMetrics.getAscent();
	int x = 10; int y = hf+15;
	gx.setFont(m_labelFont);
	for (int i = 0; i < m_legendText.size(); i++) {
	  String temp = (String)m_legendText.elementAt(i);
	  gx.setColor(m_colorList[(i % m_colorList.length)]);
	  gx.drawString(temp,x,y);
	  y+=hf;
	}
	StripChart.this.revalidate();
      }
    };

  /**
   * Holds the data to be plotted. Entries in the list are arrays of
   * y points.
   */
  private LinkedList m_dataList = new LinkedList();
  //  private double [] m_dataPoint = new double[1];
  private double [] m_previousY = new double[1];

  private transient Thread m_updateHandler;

  protected BeanVisual m_visual = 
    new BeanVisual("StripChart", 
		   BeanVisual.ICON_PATH+"StripChart.gif",
		   BeanVisual.ICON_PATH+"StripChart_animated.gif");

  private Object m_listenee = null;
  private transient weka.gui.Logger m_log = null;

  /**
   * Print x axis labels every m_xValFreq points
   */
  private int m_xValFreq = 500;
  private int m_xCount = 0;

  /**
   * Shift the plot by this many pixels every time a point is plotted
   */
  private int m_refreshWidth = 1;

  /**
   * Plot every m_refreshFrequency'th point
   */
  private int m_refreshFrequency = 5;

  public StripChart() {

    //    m_plotPanel.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));

    setLayout(new BorderLayout());
    add(m_visual, BorderLayout.CENTER);

    // start a thread to handle plot updates
    initPlot();
  }

  /**
   * GUI Tip text
   *
   * @return a <code>String</code> value
   */
  public String xLabelFreqTipText() {
    return "Show x axis labels this often";
  }

  /**
   * Set the frequency for printing x label values
   *
   * @param freq an <code>int</code> value
   */
  public void setXLabelFreq(int freq) {
    m_xValFreq = freq;
    setRefreshWidth();
  }

  /**
   * Get the frequency by which x axis values are printed
   *
   * @return an <code>int</code> value
   */
  public int getXLabelFreq() {
    return m_xValFreq;
  }

  /**
   * GUI Tip text
   *
   * @return a <code>String</code> value
   */
  public String refreshFreqTipText() {
    return "Plot every x'th data point";
  }

  /**
   * Set how often (in x axis points) to refresh the display
   *
   * @param freq an <code>int</code> value
   */
  public void setRefreshFreq(int freq) {
    m_refreshFrequency = freq;
    setRefreshWidth();
  }

  /**
   * Get the refresh frequency
   *
   * @return an <code>int</code> value
   */
  public int getRefreshFreq() {
    return m_refreshFrequency;
  }

  private void setRefreshWidth() {
    m_refreshWidth = 1;
    if (m_labelMetrics == null) {
      getGraphics().setFont(m_labelFont);
      m_labelMetrics = getGraphics().getFontMetrics(m_labelFont);
    }

    int refWidth = m_labelMetrics.stringWidth("99000");
    // compute how often x label will be rendered
    int z = (getXLabelFreq() / getRefreshFreq());
    if (z < 1) {
      z = 1;
    }
    
    if (z * m_refreshWidth < refWidth+5) {
      m_refreshWidth *= (((refWidth+5) / z) + 1) ;
    }
  }

  /**
   * Provide some necessary initialization after object has
   * been deserialized.
   *
   * @param ois an <code>ObjectInputStream</code> value
   * @exception IOException if an error occurs
   * @exception ClassNotFoundException if an error occurs
   */
  private void readObject(ObjectInputStream ois)
    throws IOException, ClassNotFoundException {
    try {
      ois.defaultReadObject();
      initPlot();
      //      startHandler();
    } catch (Exception ex) {
      ex.printStackTrace();
    }
  }

  private void initPlot() {
    m_plotPanel = new StripPlotter();
    m_plotPanel.setBackground(Color.black);
    m_scalePanel.setBackground(Color.black);
    m_legendPanel.setBackground(Color.black);
    m_xCount = 0;
  }

  private void startHandler() {
    if (m_updateHandler == null) {
      m_updateHandler = new Thread() {
	  private double [] dataPoint;
	  public void run() {
	    while (true) {
	      if (m_outputFrame != null) {
		synchronized(m_dataList) {
		  while(m_dataList.isEmpty()) {
		  //		  while (m_dataList.empty()) {
		    try {
		      m_dataList.wait();
		    } catch (InterruptedException ex) {
		      return;
		    }
		  }
		  dataPoint = (double [])m_dataList.remove(0);
		  //dataPoint  = (double [])m_dataList.pop();
		}
		if (m_outputFrame != null) {
		  StripChart.this.updateChart(dataPoint);
		}
	      }
	    }
	  }
	};
      //      m_updateHandler.setPriority(Thread.MIN_PRIORITY);
      m_updateHandler.start();
    }
  }

  /**
   * Popup the chart panel
   */
  public void showChart() {
    if (m_outputFrame == null) {      
      m_outputFrame = new JFrame("Strip Chart");
      m_outputFrame.getContentPane().setLayout(new BorderLayout());
      m_outputFrame.getContentPane().add(m_legendPanel, BorderLayout.WEST);
      m_outputFrame.getContentPane().add(m_plotPanel, BorderLayout.CENTER);
      m_outputFrame.getContentPane().add(m_scalePanel, BorderLayout.EAST);
      m_legendPanel.setMinimumSize(new Dimension(100,getHeight()));
      m_legendPanel.setPreferredSize(new Dimension(100,getHeight()));
      m_scalePanel.setMinimumSize(new Dimension(30, getHeight()));
      m_scalePanel.setPreferredSize(new Dimension(30, getHeight()));
      Font lf = new Font("Monospaced", Font.PLAIN, 12);
      m_legendPanel.setBorder(BorderFactory.
			      createTitledBorder(BorderFactory.
				    createEtchedBorder(Color.gray,
						       Color.darkGray),
				    "Legend" ,
				    TitledBorder.CENTER,
				    TitledBorder.DEFAULT_POSITION, lf, 
				    Color.blue));
      m_outputFrame.addWindowListener(new java.awt.event.WindowAdapter() {
	  public void windowClosing(java.awt.event.WindowEvent e) {
	    if (m_updateHandler != null) {