propertysheetpanel.java

一个数据挖掘软件ALPHAMINERR的整个过程的JAVA版源代码

/*
 *    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.
 */

/*
 *    PropertySheet.java
 *    Copyright (C) 1999 Len Trigg
 *
 */


package weka.gui;

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.beans.BeanInfo;
import java.beans.Beans;
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.MethodDescriptor;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.beans.PropertyDescriptor;
import java.beans.PropertyEditor;
import java.beans.PropertyEditorManager;
import java.beans.PropertyVetoException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.SwingConstants;


/** 
 * Displays a property sheet where (supported) properties of the target
 * object may be edited.
 *
 * @author Len Trigg ([e-mail])
 * @version $Revision$
 */
public class PropertySheetPanel extends JPanel
  implements PropertyChangeListener {

  /** The target object being edited */
  private Object m_Target;

  /** Holds properties of the target */
  private PropertyDescriptor m_Properties[];

  /** Holds the methods of the target */
  private MethodDescriptor m_Methods[];

  /** Holds property editors of the object */
  private PropertyEditor m_Editors[];

  /** Holds current object values for each property */
  private Object m_Values[];

  /** Stores GUI components containing each editing component */
  private JComponent m_Views[];

  /** The labels for each property */
  private JLabel m_Labels[];

  /** The tool tip text for each property */
  private String m_TipTexts[];

  /** StringBuffer containing help text for the object being edited */
  private StringBuffer m_HelpText;

  /** Help frame */
  private JFrame m_HelpFrame;

  /** Button to pop up the full help text in a separate frame */
  private JButton m_HelpBut;

  /** A count of the number of properties we have an editor for */
  private int m_NumEditable = 0;

  /** The panel holding global info and help, if provided by
      the object being editied */
  private JPanel m_aboutPanel;

  /**
   * Creates the property sheet panel.
   */
  public PropertySheetPanel() {

    //    setBorder(BorderFactory.createLineBorder(Color.red));
    setBorder(BorderFactory.createEmptyBorder(0, 0, 10, 0));
  }

  /**
   * Return the panel containing global info and help for
   * the object being edited. May return null if the edited
   * object provides no global info or tip text.
   *
   * @return the about panel.
   */
  public JPanel getAboutPanel() {
    return m_aboutPanel;
  }

  /** A support object for handling property change listeners */ 
  private PropertyChangeSupport support = new PropertyChangeSupport(this);

  /**
   * Updates the property sheet panel with a changed property and also passed
   * the event along.
   *
   * @param evt a value of type 'PropertyChangeEvent'
   */
  public void propertyChange(PropertyChangeEvent evt) {
    wasModified(evt); // Let our panel update before guys downstream
    support.firePropertyChange("", null, null);
  }

  /**
   * Adds a PropertyChangeListener.
   *
   * @param l a value of type 'PropertyChangeListener'
   */
  public void addPropertyChangeListener(PropertyChangeListener l) {
    support.addPropertyChangeListener(l);
  }

  /**
   * Removes a PropertyChangeListener.
   *
   * @param l a value of type 'PropertyChangeListener'
   */
  public void removePropertyChangeListener(PropertyChangeListener l) {
    support.removePropertyChangeListener(l);
  }

  /**
   * Sets a new target object for customisation.
   *
   * @param targ a value of type 'Object'
   */
  public synchronized void setTarget(Object targ) {

    // used to offset the components for the properties of targ
    // if there happens to be globalInfo available in targ
    int componentOffset = 0;

    // Close any child windows at this point
    removeAll();
    
    GridBagLayout gbLayout = new GridBagLayout();

    setLayout(gbLayout);
    setVisible(false);
    m_NumEditable = 0;
    m_Target = targ;
    try {
      BeanInfo bi = Introspector.getBeanInfo(m_Target.getClass());
      m_Properties = bi.getPropertyDescriptors();
      m_Methods = bi.getMethodDescriptors();
    } catch (IntrospectionException ex) {
      System.err.println("PropertySheet: Couldn't introspect");
      return;
    }

    int rowHeight = 12;
    JTextArea jt = new JTextArea();
    m_HelpText = null;
    JScrollPane js = null;
    // Look for a globalInfo method that returns a string
    // describing the target
    for (int i = 0;i < m_Methods.length; i++) {
      String name = m_Methods[i].getDisplayName();
      Method meth = m_Methods[i].getMethod();
      if (name.equals("globalInfo")) {
	if (meth.getReturnType().equals(String.class)) {
	  try {
	    Object args[] = { };
	    String globalInfo = (String)(meth.invoke(m_Target, args));
            String summary = globalInfo;
            int ci = globalInfo.indexOf('.');
            if (ci != -1) {
              summary = globalInfo.substring(0, ci + 1);
            }
	    final String className = targ.getClass().getName();
            m_HelpText = new StringBuffer("NAME\n");
            m_HelpText.append(className).append("\n\n");
            m_HelpText.append("SYNOPSIS\n").append(globalInfo).append("\n\n");
            m_HelpBut = new JButton("More");
	    m_HelpBut.setToolTipText("More information about "
                                     + className);
	    
	    m_HelpBut.addActionListener(new ActionListener() {
              public void actionPerformed(ActionEvent a) {
                openHelpFrame();
                m_HelpBut.setEnabled(false);
              }
            });

	    jt.setColumns(30);
	    jt.setFont(new Font("SansSerif", Font.PLAIN,12));
	    jt.setEditable(false);
	    jt.setLineWrap(true);
	    jt.setWrapStyleWord(true);
	    jt.setText(summary);
            jt.setBackground(getBackground());
	    rowHeight = 12;
	    JPanel jp = new JPanel();
	    jp.setBorder(BorderFactory.createCompoundBorder(
			 BorderFactory.createTitledBorder("About"),
			 BorderFactory.createEmptyBorder(5, 5, 5, 5)
		 ));
	    jp.setLayout(new BorderLayout());
	    jp.add(jt, BorderLayout.CENTER);
            JPanel p2 = new JPanel();
            p2.setLayout(new BorderLayout());
            p2.add(m_HelpBut, BorderLayout.NORTH);
            jp.add(p2, BorderLayout.EAST);
	    GridBagConstraints gbConstraints = new GridBagConstraints();
	    //	    gbConstraints.anchor = GridBagConstraints.EAST;
	    gbConstraints.fill = GridBagConstraints.BOTH;
	    //	    gbConstraints.gridy = 0;     gbConstraints.gridx = 0;
	    gbConstraints.gridwidth = 2;
	    gbConstraints.insets = new Insets(0,5,0,5);
	    gbLayout.setConstraints(jp, gbConstraints);
	    m_aboutPanel = jp;
	    add(m_aboutPanel);
	    componentOffset = 1;
	    break;
	  } catch (Exception ex) {
	    
	  }
	}
      }
    }

    m_Editors = new PropertyEditor[m_Properties.length];
    m_Values = new Object[m_Properties.length];
    m_Views = new JComponent[m_Properties.length];
    m_Labels = new JLabel[m_Properties.length];
    m_TipTexts = new String[m_Properties.length];
    boolean firstTip = true;
    for (int i = 0; i < m_Properties.length; i++) {

      // Don't display hidden or expert properties.
      if (m_Properties[i].isHidden() || m_Properties[i].isExpert()) {
	continue;
      }

      String name = m_Properties[i].getDisplayName();
      Class type = m_Properties[i].getPropertyType();
      Method getter = m_Properties[i].getReadMethod();
      Method setter = m_Properties[i].getWriteMethod();

      // Only display read/write properties.
      if (getter == null || setter == null) {
	continue;
      }
	
      JComponent view = null;

      try {
	Object args[] = { };
	Object value = getter.invoke(m_Target, args);
	m_Values[i] = value;

	PropertyEditor editor = null;
	Class pec = m_Properties[i].getPropertyEditorClass();
	if (pec != null) {
	  try {
	    editor = (PropertyEditor)pec.newInstance();
	  } catch (Exception ex) {
	    // Drop through.
	  }
	}