content: /*
   *    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.
   */
  
  /*
   *    InstancesSummaryPanel.java
   *    Copyright (C) 1999 University of Waikato, Hamilton, New Zealand
   *
   */
  
  package weka.gui;
  
  import weka.core.Instances;
  import weka.core.Utils;
  
  import java.awt.BorderLayout;
  import java.awt.GridBagConstraints;
  import java.awt.GridBagLayout;
  
  import javax.swing.BorderFactory;
  import javax.swing.JLabel;
  import javax.swing.JPanel;
  import javax.swing.SwingConstants;
  
  /** 
   * This panel just displays relation name, number of instances, and number of
   * attributes.
   *
   * @author Len Trigg (trigg@cs.waikato.ac.nz)
   * @version $Revision: 7229 $
   */
  public class InstancesSummaryPanel
    extends JPanel {
  
    /** for serialization */
    private static final long serialVersionUID = -5243579535296681063L;
  
    /** Message shown when no instances have been loaded */
    protected static final String NO_SOURCE = "None";
  
    /** Displays the name of the relation */
    protected JLabel m_RelationNameLab = new JLabel(NO_SOURCE);
    
    /** Displays the number of instances */
    protected JLabel m_NumInstancesLab = new JLabel(NO_SOURCE);
    
    /** Displays the number of attributes */
    protected JLabel m_NumAttributesLab = new JLabel(NO_SOURCE);
    
    /** Displays the sum of instance weights */
    protected JLabel m_sumOfWeightsLab = new JLabel(NO_SOURCE);
      
    /** The instances we're playing with */
    protected Instances m_Instances;
    
    /** 
     * Whether to display 0 or ? for the number of instances
     * in cases where a dataset has only structure. Depending
     * on where this panel is used from, the user may have
     * loaded a dataset with no instances or a Loader that
     * can read incrementally may be being used (in which case
     * we don't know how many instances are in the dataset... 
     * yet).
     */
    protected boolean m_showZeroInstancesAsUnknown = false;
  
    /**
     * Creates the instances panel with no initial instances.
     */
    public InstancesSummaryPanel() {
  
      GridBagLayout gbLayout = new GridBagLayout();
      setLayout(gbLayout);
      JLabel lab = new JLabel("Relation:", SwingConstants.RIGHT);
      lab.setBorder(BorderFactory.createEmptyBorder(0, 10, 0, 0));
      GridBagConstraints gbConstraints = new GridBagConstraints();
      gbConstraints.anchor = GridBagConstraints.EAST;
      gbConstraints.fill = GridBagConstraints.HORIZONTAL;
      gbConstraints.gridy = 0;     gbConstraints.gridx = 0;
      gbLayout.setConstraints(lab, gbConstraints);
      add(lab);
      gbConstraints = new GridBagConstraints();
      gbConstraints.anchor = GridBagConstraints.WEST;
      gbConstraints.fill = GridBagConstraints.HORIZONTAL;
      gbConstraints.gridy = 0;     gbConstraints.gridx = 1;
      gbConstraints.weightx = 100; //gbConstraints.gridwidth = GridBagConstraints.RELATIVE;
      gbLayout.setConstraints(m_RelationNameLab, gbConstraints);
      add(m_RelationNameLab);
      m_RelationNameLab.setBorder(BorderFactory.createEmptyBorder(0, 5, 0, 10));
      
      lab = new JLabel("Instances:", SwingConstants.RIGHT);
      lab.setBorder(BorderFactory.createEmptyBorder(0, 10, 0, 0));
      gbConstraints = new GridBagConstraints();
      gbConstraints.anchor = GridBagConstraints.EAST;
      gbConstraints.fill = GridBagConstraints.HORIZONTAL;
      gbConstraints.gridy = 1;     gbConstraints.gridx = 0;
      gbLayout.setConstraints(lab, gbConstraints);
      add(lab);
      gbConstraints = new GridBagConstraints();
      gbConstraints.anchor = GridBagConstraints.WEST;
      gbConstraints.fill = GridBagConstraints.HORIZONTAL;
      gbConstraints.gridy = 1;     gbConstraints.gridx = 1;
      gbConstraints.weightx = 100;
      gbLayout.setConstraints(m_NumInstancesLab, gbConstraints);
      add(m_NumInstancesLab);
      m_NumInstancesLab.setBorder(BorderFactory.createEmptyBorder(0, 5, 0, 10));
  
      lab = new JLabel("Attributes:", SwingConstants.RIGHT);
      lab.setBorder(BorderFactory.createEmptyBorder(0, 10, 0, 0));
      gbConstraints = new GridBagConstraints();
      gbConstraints.anchor = GridBagConstraints.EAST;
      gbConstraints.fill = GridBagConstraints.HORIZONTAL;
      gbConstraints.gridy = 0;     gbConstraints.gridx = 2;
      gbLayout.setConstraints(lab, gbConstraints);
      add(lab);
      gbConstraints = new GridBagConstraints();
      gbConstraints.anchor = GridBagConstraints.WEST;
      gbConstraints.fill = GridBagConstraints.HORIZONTAL;
      gbConstraints.gridy = 0;     gbConstraints.gridx = 3;
      //gbConstraints.weightx = 100;
      gbLayout.setConstraints(m_NumAttributesLab, gbConstraints);
      add(m_NumAttributesLab);
      m_NumAttributesLab.setBorder(BorderFactory.createEmptyBorder(0, 5,
  								 0, 10));
      
      lab = new JLabel("Sum of weights:", SwingConstants.RIGHT);
      lab.setBorder(BorderFactory.createEmptyBorder(0, 10, 0, 0));
      gbConstraints = new GridBagConstraints();
      gbConstraints.anchor = GridBagConstraints.EAST;
      gbConstraints.fill = GridBagConstraints.HORIZONTAL;
      gbConstraints.gridy = 1;     gbConstraints.gridx = 2;
      gbLayout.setConstraints(lab, gbConstraints);
      add(lab);
      gbConstraints = new GridBagConstraints();
      gbConstraints.anchor = GridBagConstraints.WEST;
      gbConstraints.fill = GridBagConstraints.HORIZONTAL;
      gbConstraints.gridy = 1;     gbConstraints.gridx = 3;
      //gbConstraints.weightx = 100;
      gbLayout.setConstraints(m_sumOfWeightsLab, gbConstraints);
      add(m_sumOfWeightsLab);
      m_sumOfWeightsLab.setBorder(BorderFactory.createEmptyBorder(0, 5,
                                                                   0, 10));
      
    }
    
    public void setShowZeroInstancesAsUnknown(boolean zeroAsUnknown) {
      m_showZeroInstancesAsUnknown = zeroAsUnknown;
    }
    
    public boolean getShowZeroInstancesAsUnknown() {
      return m_showZeroInstancesAsUnknown;
    }
  
    /**
     * Tells the panel to use a new set of instances.
     *
     * @param inst a set of Instances
     */
    public void setInstances(Instances inst) {
      m_Instances = inst;
      m_RelationNameLab.setText(m_Instances.relationName());
      m_RelationNameLab.setToolTipText(m_Instances.relationName());
      m_NumInstancesLab.setText("" + 
          ((m_showZeroInstancesAsUnknown && m_Instances.numInstances() == 0) 
              ? "?" 
              : "" + m_Instances.numInstances()));
      m_NumAttributesLab.setText("" + m_Instances.numAttributes());
      m_sumOfWeightsLab.setText("" + 
          ((m_showZeroInstancesAsUnknown && m_Instances.numInstances() == 0) 
              ? "?" 
              : "" + Utils.doubleToString(m_Instances.sumOfWeights(), 3)));
    }
  
    /**
     * Tests out the instance summary panel from the command line.
     *
     * @param args optional name of dataset to load
     */
    public static void main(String [] args) {
  
      try {
        final javax.swing.JFrame jf = new javax.swing.JFrame("Instances Panel");
        jf.getContentPane().setLayout(new BorderLayout());
        final InstancesSummaryPanel p = new InstancesSummaryPanel();
        p.setBorder(BorderFactory.createTitledBorder("Relation"));
        jf.getContentPane().add(p, BorderLayout.CENTER);
        jf.addWindowListener(new java.awt.event.WindowAdapter() {
  	public void windowClosing(java.awt.event.WindowEvent e) {
  	  jf.dispose();
  	  System.exit(0);
  	}
        });
        jf.pack();
        jf.setVisible(true);
        if (args.length == 1) {
  	java.io.Reader r = new java.io.BufferedReader(
  			   new java.io.FileReader(args[0]));
  	Instances i = new Instances(r);
  	p.setInstances(i);
        }
      } catch (Exception ex) {
        ex.printStackTrace();
        System.err.println(ex.getMessage());
      }
    }
    
  }
  