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.
   */
  
  /*
   *    ClassAssignerCustomizer.java
   *    Copyright (C) 2002 University of Waikato, Hamilton, New Zealand
   *
   */
  
  package weka.gui.beans;
  
  import weka.core.Attribute;
  import weka.core.Instances;
  import weka.gui.PropertySheetPanel;
  
  import java.awt.BorderLayout;
  import java.awt.GridLayout;
  import java.awt.Window;
  import java.awt.event.ActionEvent;
  import java.awt.event.ActionListener;
  import java.beans.Customizer;
  import java.beans.PropertyChangeListener;
  import java.beans.PropertyChangeSupport;
  
  import javax.swing.BorderFactory;
  import javax.swing.DefaultComboBoxModel;
  import javax.swing.JButton;
  import javax.swing.JComboBox;
  import javax.swing.JPanel;
  
  /**
   * GUI customizer for the class assigner bean
   *
   * @author <a href="mailto:mhall@cs.waikato.ac.nz">Mark Hall</a>
   * @version $Revision: 7443 $
   */
  public class ClassAssignerCustomizer
    extends JPanel
    implements BeanCustomizer, CustomizerClosingListener, 
    CustomizerCloseRequester, DataFormatListener {
  
    /** for serialization */
    private static final long serialVersionUID = 476539385765301907L;
  
    private boolean m_displayColNames = false;
  
    private transient ClassAssigner m_classAssigner;
  
    private transient PropertyChangeSupport m_pcSupport = 
      new PropertyChangeSupport(this);
  
    private transient PropertySheetPanel m_caEditor = 
      new PropertySheetPanel();
  
    private transient JComboBox m_ClassCombo = new JComboBox();
    private transient JPanel m_holderP = new JPanel();
    
    private transient ModifyListener m_modifyListener;
    
    private transient Window m_parent;
    
    private transient String m_backup;
  
    public ClassAssignerCustomizer() {
      setBorder(javax.swing.BorderFactory.createEmptyBorder(0, 5, 5, 5));
  
      setLayout(new BorderLayout());
      add(new javax.swing.JLabel("ClassAssignerCustomizer"), 
  	BorderLayout.NORTH);
      m_holderP.setLayout(new BorderLayout());
      m_holderP.setBorder(BorderFactory.createTitledBorder("Choose class attribute"));
      m_holderP.add(m_ClassCombo, BorderLayout.CENTER);
      m_ClassCombo.addActionListener(new ActionListener() {
  	public void actionPerformed(ActionEvent e) {
  	  if (m_classAssigner != null && m_displayColNames == true) {
  	    m_classAssigner.setClassColumn(""+(m_ClassCombo.getSelectedIndex()));
  	  }
  	}
        });
      add(m_caEditor, BorderLayout.CENTER);
      addButtons();
    }
    
    private void addButtons() {
      JButton okBut = new JButton("OK");
      JButton cancelBut = new JButton("Cancel");
      
      JPanel butHolder = new JPanel();
      butHolder.setLayout(new GridLayout(1, 2));
      butHolder.add(okBut); butHolder.add(cancelBut);
      add(butHolder, BorderLayout.SOUTH);
      
      okBut.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
          m_modifyListener.setModifiedStatus(ClassAssignerCustomizer.this, true);
          if (m_parent != null) {
            m_parent.dispose();
          }
        }
      });
      
      cancelBut.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
          customizerClosing();
          if (m_parent != null) {
            m_parent.dispose();
          }
        }
      });
    }
  
    private void setUpStandardSelection() {
      if (m_displayColNames == true) {
        remove(m_holderP);
        m_caEditor.setTarget(m_classAssigner);
        add(m_caEditor, BorderLayout.CENTER);
        m_displayColNames = false;
      }
      validate(); repaint();
    }
    
    private void setUpColumnSelection(Instances format) {
      if (m_displayColNames == false) {
        remove(m_caEditor);
      }
  
      int existingClassCol = 0;
      
      String classColString = m_classAssigner.getClassColumn();
      if (classColString.trim().toLowerCase().compareTo("last") == 0 ||
          classColString.equalsIgnoreCase("/last")) {
        existingClassCol = format.numAttributes() - 1;
      } else if (classColString.trim().toLowerCase().compareTo("first") == 0 ||
          classColString.equalsIgnoreCase("/first")) {
        // nothing to do
      } else {
        // try to look up class attribute as a label
        Attribute classAtt = format.attribute(classColString);
        if (classAtt != null) {
          existingClassCol = classAtt.index();
        } else {
          // parse it as a number
          existingClassCol = Integer.parseInt(classColString);
          if (existingClassCol < 0) {
            existingClassCol = -1; // no class
          } else if (existingClassCol > format.numAttributes() - 1) {
            existingClassCol = format.numAttributes() - 1;
          } else {
            existingClassCol--; // make it zero-based (rather than 1-based)
          }
        }
      }
      
      //int existingClassCol = format.classIndex();
  
  /*    if (existingClassCol < 0) {
        existingClassCol = 0;
      } */
      String [] attribNames = new String [format.numAttributes()+1];
      attribNames[0] = "NO CLASS";
      for (int i = 1; i < attribNames.length; i++) {
        String type = "(" + Attribute.typeToStringShort(format.attribute(i-1)) + ") ";
        attribNames[i] = type + format.attribute(i-1).name();
      }
      m_ClassCombo.setModel(new DefaultComboBoxModel(attribNames));
      if (attribNames.length > 0) {
        m_ClassCombo.setSelectedIndex(existingClassCol+1);
      }
      if (m_displayColNames == false) {
        add(m_holderP, BorderLayout.CENTER);
        m_displayColNames = true;
      }
      validate(); repaint();
    }
  
    /**
     * Set the bean to be edited
     *
     * @param object an <code>Object</code> value
     */
    public void setObject(Object object) {
      if (m_classAssigner != (ClassAssigner)object) {
        m_classAssigner = (ClassAssigner)object;
        // remove ourselves as a listener from the old ClassAssigner (if necessary)
  /*      if (m_classAssigner != null) {
  	m_classAssigner.removeDataFormatListener(this);
        }
  
        // add ourselves as a data format listener
        m_classAssigner.addDataFormatListener(this); */
        m_caEditor.setTarget(m_classAssigner);
        if (m_classAssigner.getConnectedFormat() != null) {
  	setUpColumnSelection(m_classAssigner.getConnectedFormat());
        }
        m_backup = m_classAssigner.getClassColumn();
      }
    }
  
    public void customizerClosing() {
      // remove ourselves as a listener from the ClassAssigner (if necessary)
      if (m_classAssigner != null) {
        //System.out.println("Customizer deregistering with class assigner");
        m_classAssigner.removeDataFormatListener(this);
      }
      
      if (m_backup != null) {
        m_classAssigner.setClassColumn(m_backup);
      }
    }
  
    public void newDataFormat(DataSetEvent dse) {
      if (dse.getDataSet() != null) {
        //      System.err.println("Setting up column selection.........");
        setUpColumnSelection(m_classAssigner.getConnectedFormat());
      } else {
        setUpStandardSelection();
      }
    }
  
    /**
     * Add a property change listener
     *
     * @param pcl a <code>PropertyChangeListener</code> value
     */
    public void addPropertyChangeListener(PropertyChangeListener pcl) {
      m_pcSupport.addPropertyChangeListener(pcl);
    }
    
    /**
     * Remove a property change listener
     *
     * @param pcl a <code>PropertyChangeListener</code> value
     */
    public void removePropertyChangeListener(PropertyChangeListener pcl) {
      m_pcSupport.removePropertyChangeListener(pcl);
    }
  
    @Override
    public void setModifiedListener(ModifyListener l) {
      m_modifyListener = l;
    }
  
    @Override
    public void setParentWindow(Window parent) {
      m_parent = parent;
    }
  }
  