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The Waikato Environment for Knowledge Analysis (WEKA), a machine learning workbench. This is the stable version. Apart from bugfixes, this version does not receive any other updates.
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/*
 *    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.
 */

/*
 *    LegendPanel.java
 *    Copyright (C) 2000 University of Waikato, Hamilton, New Zealand
 *
 */

package weka.gui.visualize;

import weka.core.FastVector;
import weka.core.Instances;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JColorChooser;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;

/**
 * This panel displays legends for a list of plots. If a given plot
 * has a custom colour defined then this panel allows the colour to
 * be changed.
 *
 * @author Mark Hall ([email protected])
 * @version $Revision: 7059 $
 */
public class LegendPanel
  extends JScrollPane {

  /** for serialization */
  private static final long serialVersionUID = -1262384440543001505L;

  /** the list of plot elements */
  protected FastVector m_plots;

  /** the panel that contains the legend entries */
  protected JPanel m_span=null;

  /** a list of components that need to be repainted when a colour is
      changed */
  protected FastVector m_Repainters = new FastVector();

  /**
   * Inner class for handling legend entries
   */
  protected class LegendEntry
    extends JPanel {

    /** for serialization */
    private static final long serialVersionUID = 3879990289042935670L;

    /** the data for this legend entry */
    private PlotData2D m_plotData=null;

    /** the index (in the list of plots) of the data for this legend---
	used to draw the correct shape for this data */
    private int m_dataIndex;

    /** the text part of this legend */
    private JLabel m_legendText;

    /** displays the point shape associated with this legend entry */
    private JPanel m_pointShape;

    public LegendEntry(PlotData2D data, int dataIndex) {
      javax.swing.ToolTipManager.sharedInstance().setDismissDelay(5000);
      m_plotData = data;
      m_dataIndex = dataIndex;
      //      this.setBackground(Color.black);
      /*      this.setPreferredSize(new Dimension(0, 20));
	      this.setMinimumSize(new Dimension(0, 20)); */

      if (m_plotData.m_useCustomColour) {
	this.addMouseListener(new MouseAdapter() {
	    public void mouseClicked(MouseEvent e) {
	      
	      if ((e.getModifiers() & e.BUTTON1_MASK) == e.BUTTON1_MASK) {
		Color tmp = JColorChooser.showDialog
		  (LegendPanel.this, Messages.getInstance().getString("LegendPanel_Main_JColorChooserShowDialog_Text"), 
		   m_plotData.m_customColour);
		
		if (tmp != null) {
		  m_plotData.m_customColour = tmp;
		  m_legendText.setForeground(tmp);

		  if (m_Repainters.size() > 0) {
		    for (int i=0;i").length;
     for (int i=0;i 0) {
         constraints.gridheight = (numLines + 2);
       } */
       m_span.add(tmp, constraints);
     }
  }

  /**
   * Main method for testing this class
   * @param args a list of arff files
   */
  public static void main(String [] args) {
    try {
      if (args.length < 1) {
	System.err.println(Messages.getInstance().getString("LegendPanel_Main_Error_Text_First"));
	System.exit(1);
      }

      final javax.swing.JFrame jf = 
	new javax.swing.JFrame(Messages.getInstance().getString("LegendPanel_Main_JFrame_Text"));
      jf.setSize(100,100);
      jf.getContentPane().setLayout(new BorderLayout());
      final LegendPanel p2 = new LegendPanel();
      jf.getContentPane().add(p2, BorderLayout.CENTER);
      jf.addWindowListener(new java.awt.event.WindowAdapter() {
	public void windowClosing(java.awt.event.WindowEvent e) {
	  jf.dispose();
	  System.exit(0);
	}
      });

      FastVector plotList = new FastVector();
      for (int j=0;j