/*
* 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.
*/
/*
* AttributeListPanel.java
* Copyright (C) 2002 University of Waikato, Hamilton, New Zealand
*
*/
package weka.gui;
import weka.core.Instances;
import java.awt.BorderLayout;
import java.awt.Dimension;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.ListSelectionModel;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableColumnModel;
/**
* Creates a panel that displays the attributes contained in a set of
* instances, letting the user select a single attribute for inspection.
*
* @author Richard Kirkby (rkirkby@cs.waikato.ac.nz)
* @author Len Trigg (trigg@cs.waikato.ac.nz)
* @version $Revision: 1.3 $
*/
public class AttributeListPanel
extends JPanel {
/** for serialization */
private static final long serialVersionUID = -2030706987910400362L;
/**
* A table model that looks at the names of attributes.
*/
class AttributeTableModel
extends AbstractTableModel {
/** for serialization */
private static final long serialVersionUID = -7345701953670327707L;
/** The instances who's attribute structure we are reporting */
protected Instances m_Instances;
/**
* Creates the tablemodel with the given set of instances.
*
* @param instances the initial set of Instances
*/
public AttributeTableModel(Instances instances) {
setInstances(instances);
}
/**
* Sets the tablemodel to look at a new set of instances.
*
* @param instances the new set of Instances.
*/
public void setInstances(Instances instances) {
m_Instances = instances;
}
/**
* Gets the number of attributes.
*
* @return the number of attributes.
*/
public int getRowCount() {
return m_Instances.numAttributes();
}
/**
* Gets the number of columns: 2
*
* @return 2
*/
public int getColumnCount() {
return 2;
}
/**
* Gets a table cell
*
* @param row the row index
* @param column the column index
* @return the value at row, column
*/
public Object getValueAt(int row, int column) {
switch (column) {
case 0:
return new Integer(row + 1);
case 1:
return m_Instances.attribute(row).name();
default:
return null;
}
}
/**
* Gets the name for a column.
*
* @param column the column index.
* @return the name of the column.
*/
public String getColumnName(int column) {
switch (column) {
case 0:
return new String("No.");
case 1:
return new String("Name");
default:
return null;
}
}
/**
* Gets the class of elements in a column.
*
* @param col the column index.
* @return the class of elements in the column.
*/
public Class getColumnClass(int col) {
return getValueAt(0, col).getClass();
}
/**
* Returns false
*
* @param row ignored
* @param col ignored
* @return false
*/
public boolean isCellEditable(int row, int col) {
return false;
}
}
/** The table displaying attribute names */
protected JTable m_Table = new JTable();
/** The table model containing attribute names */
protected AttributeTableModel m_Model;
/**
* Creates the attribute selection panel with no initial instances.
*/
public AttributeListPanel() {
m_Table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
m_Table.setColumnSelectionAllowed(false);
m_Table.setPreferredScrollableViewportSize(new Dimension(250, 150));
setLayout(new BorderLayout());
add(new JScrollPane(m_Table), BorderLayout.CENTER);
}
/**
* Sets the instances who's attribute names will be displayed.
*
* @param newInstances the new set of instances
*/
public void setInstances(Instances newInstances) {
if (m_Model == null) {
m_Model = new AttributeTableModel(newInstances);
m_Table.setModel(m_Model);
TableColumnModel tcm = m_Table.getColumnModel();
tcm.getColumn(0).setMaxWidth(60);
tcm.getColumn(1).setMinWidth(100);
} else {
m_Model.setInstances(newInstances);
}
m_Table.sizeColumnsToFit(-1);
m_Table.revalidate();
m_Table.repaint();
}
/**
* Gets the selection model used by the table.
*
* @return a value of type 'ListSelectionModel'
*/
public ListSelectionModel getSelectionModel() {
return m_Table.getSelectionModel();
}
/**
* Tests the attribute list panel from the command line.
*
* @param args must contain the name of an arff file to load.
*/
public static void main(String[] args) {
try {
if (args.length == 0) {
throw new Exception("supply the name of an arff file");
}
Instances i = new Instances(new java.io.BufferedReader(
new java.io.FileReader(args[0])));
AttributeListPanel asp = new AttributeListPanel();
final javax.swing.JFrame jf =
new javax.swing.JFrame("Attribute List Panel");
jf.getContentPane().setLayout(new BorderLayout());
jf.getContentPane().add(asp, 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);
asp.setInstances(i);
} catch (Exception ex) {
ex.printStackTrace();
System.err.println(ex.getMessage());
}
}
} // AttributeListPanel