Java tutorial
/* * 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. */ /* * GeneratorPropertyIteratorPanel.java * Copyright (C) 1999 Len Trigg, Mark Hall * */ package milk.gui.experiment; import weka.core.FastVector; import weka.gui.GenericArrayEditor; import weka.gui.PropertySelectorDialog; import weka.experiment.PropertyNode; import milk.experiment.MIExperiment; import milk.experiment.MIResultProducer; import java.awt.Component; import java.awt.BorderLayout; import java.awt.GridLayout; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import java.awt.event.ActionListener; import java.awt.GridBagLayout; import java.awt.GridBagConstraints; import java.awt.Insets; import javax.swing.JPanel; import javax.swing.JLabel; import javax.swing.JFrame; import javax.swing.SwingConstants; import javax.swing.JTextField; import javax.swing.BorderFactory; import javax.swing.DefaultListModel; import javax.swing.JScrollPane; import javax.swing.JButton; import java.awt.FlowLayout; import javax.swing.Box; import javax.swing.BoxLayout; import javax.swing.JComboBox; import javax.swing.ComboBoxModel; import javax.swing.DefaultComboBoxModel; import java.awt.event.ActionEvent; import java.awt.Dimension; import java.beans.PropertyDescriptor; import java.lang.reflect.Array; import java.beans.PropertyChangeListener; import java.beans.PropertyChangeEvent; /** * This panel controls setting a list of values for an arbitrary * resultgenerator property for an experiment to iterate over. * * @author Len Trigg (trigg@cs.waikato.ac.nz) * @version $Revision: 1.8 $ */ public class MIGeneratorPropertyIteratorPanel extends JPanel implements ActionListener { /** Click to select the property to iterate over */ protected JButton m_ConfigureBut = new JButton("Select property..."); /** Controls whether the custom iterator is used or not */ protected JComboBox m_StatusBox = new JComboBox(); /** Allows editing of the custom property values */ protected GenericArrayEditor m_ArrayEditor = new GenericArrayEditor(); /** The experiment this all applies to */ protected MIExperiment m_Exp; /** Listeners who want to be notified about editing status of this panel */ protected FastVector m_Listeners = new FastVector(); /** * Creates the property iterator panel initially disabled. */ public MIGeneratorPropertyIteratorPanel() { String[] options = { "Disabled", "Enabled" }; ComboBoxModel cbm = new DefaultComboBoxModel(options); m_StatusBox.setModel(cbm); m_StatusBox.setSelectedIndex(0); m_StatusBox.addActionListener(this); m_StatusBox.setEnabled(false); m_ConfigureBut.setEnabled(false); m_ConfigureBut.addActionListener(this); JPanel buttons = new JPanel(); GridBagLayout gb = new GridBagLayout(); GridBagConstraints constraints = new GridBagConstraints(); buttons.setBorder(BorderFactory.createEmptyBorder(10, 5, 10, 5)); // buttons.setLayout(new GridLayout(1, 2)); buttons.setLayout(gb); constraints.gridx = 0; constraints.gridy = 0; constraints.weightx = 5; constraints.fill = GridBagConstraints.HORIZONTAL; constraints.gridwidth = 1; constraints.gridheight = 1; constraints.insets = new Insets(0, 2, 0, 2); buttons.add(m_StatusBox, constraints); constraints.gridx = 1; constraints.gridy = 0; constraints.weightx = 5; constraints.gridwidth = 1; constraints.gridheight = 1; buttons.add(m_ConfigureBut, constraints); buttons.setMaximumSize(new Dimension(buttons.getMaximumSize().width, buttons.getMinimumSize().height)); setBorder(BorderFactory.createTitledBorder("Generator properties")); setLayout(new BorderLayout()); add(buttons, BorderLayout.NORTH); // add(Box.createHorizontalGlue()); m_ArrayEditor.setBorder(BorderFactory.createEtchedBorder()); m_ArrayEditor.addPropertyChangeListener(new PropertyChangeListener() { public void propertyChange(PropertyChangeEvent e) { System.err.println("Updating experiment property iterator array"); m_Exp.setPropertyArray(m_ArrayEditor.getValue()); } }); add(m_ArrayEditor, BorderLayout.CENTER); } /** * Creates the property iterator panel and sets the experiment. * * @param exp a value of type 'Experiment' */ public MIGeneratorPropertyIteratorPanel(MIExperiment exp) { this(); setExperiment(exp); } /** * Returns true if the editor is currently in an active status---that * is the array is active and able to be edited. * @return true if editor is active */ public boolean getEditorActive() { if (m_StatusBox.getSelectedIndex() == 0) { return false; } return true; } /** * Sets the experiment which will have the custom properties edited. * * @param exp a value of type 'Experiment' */ public void setExperiment(MIExperiment exp) { m_Exp = exp; m_StatusBox.setEnabled(true); m_ArrayEditor.setValue(m_Exp.getPropertyArray()); if (m_Exp.getPropertyArray() == null) { m_StatusBox.setSelectedIndex(0); m_ConfigureBut.setEnabled(false); } else { m_StatusBox.setSelectedIndex(m_Exp.getUsePropertyIterator() ? 1 : 0); m_ConfigureBut.setEnabled(m_Exp.getUsePropertyIterator()); } validate(); } /** * Gets the user to select a property of the current resultproducer. * * @return APPROVE_OPTION if the selection went OK, otherwise the selection * was cancelled. */ protected int selectProperty() { final PropertySelectorDialog jd = new PropertySelectorDialog(null, m_Exp.getResultProducer()); jd.setLocationRelativeTo(this); int result = jd.showDialog(); if (result == PropertySelectorDialog.APPROVE_OPTION) { System.err.println("Property Selected"); PropertyNode[] path = jd.getPath(); Object value = path[path.length - 1].value; PropertyDescriptor property = path[path.length - 1].property; // Make an array containing the propertyValue Class propertyClass = property.getPropertyType(); m_Exp.setPropertyPath(path); m_Exp.setPropertyArray(Array.newInstance(propertyClass, 1)); Array.set(m_Exp.getPropertyArray(), 0, value); // Pass it to the arrayeditor m_ArrayEditor.setValue(m_Exp.getPropertyArray()); m_ArrayEditor.repaint(); System.err.println("Set new array to array editor"); } else { System.err.println("Cancelled"); } return result; } /** * Handles the various button clicking type activities. * * @param e a value of type 'ActionEvent' */ public void actionPerformed(ActionEvent e) { if (e.getSource() == m_ConfigureBut) { selectProperty(); } else if (e.getSource() == m_StatusBox) { // notify any listeners for (int i = 0; i < m_Listeners.size(); i++) { ActionListener temp = ((ActionListener) m_Listeners.elementAt(i)); temp.actionPerformed(new ActionEvent(this, ActionEvent.ACTION_PERFORMED, "Editor status change")); } // Toggles whether the custom property is used if (m_StatusBox.getSelectedIndex() == 0) { m_Exp.setUsePropertyIterator(false); m_ConfigureBut.setEnabled(false); m_ArrayEditor.setEnabled(false); m_ArrayEditor.setValue(null); validate(); } else { if (m_Exp.getPropertyArray() == null) { selectProperty(); } if (m_Exp.getPropertyArray() == null) { m_StatusBox.setSelectedIndex(0); } else { m_Exp.setUsePropertyIterator(true); m_ConfigureBut.setEnabled(true); m_ArrayEditor.setEnabled(true); } validate(); } } } /** * Add a listener interested in kowing about editor status changes * @param newA an listener to add */ public void addActionListener(ActionListener newA) { m_Listeners.addElement(newA); } /** * Tests out the panel from the command line. * * @param args ignored. */ public static void main(String[] args) { try { final JFrame jf = new JFrame("Generator Property Iterator"); jf.getContentPane().setLayout(new BorderLayout()); MIGeneratorPropertyIteratorPanel gp = new MIGeneratorPropertyIteratorPanel(); jf.getContentPane().add(gp, BorderLayout.CENTER); jf.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { jf.dispose(); System.exit(0); } }); jf.pack(); jf.setVisible(true); System.err.println("Short nap"); Thread.currentThread().sleep(3000); System.err.println("Done"); gp.setExperiment(new MIExperiment()); } catch (Exception ex) { ex.printStackTrace(); System.err.println(ex.getMessage()); } } }