/*
 * $Id$
 *
 * Copyright (c) 2000-2009 by Rodney Kinney, Brent Easton
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License (LGPL) as published by the Free Software Foundation.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, copies are available
 * at http://www.opensource.org.
 */
/*
 * Created by IntelliJ IDEA.
 * User: rkinney
 * Date: Jul 20, 2002
 * Time: 3:52:36 AM
 * To change template for new class use
 * Code Style | Class Templates options (Tools | IDE Options).
 */
package VASSAL.configure;

import java.awt.Component;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

import javax.swing.Box;
import javax.swing.DefaultComboBoxModel;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;

/**
 * A Configurer that returns a String from among a list of possible values
 */
public class StringEnumConfigurer extends Configurer {
  private String[] validValues;
  private JComboBox box;
  private Box panel;

  public StringEnumConfigurer(String key, String name, String[] validValues) {
    super(key, name);
    this.validValues = validValues;
  }

  public Component getControls() {
    if (panel == null) {
      panel = Box.createHorizontalBox();
      panel.add(new JLabel(name));
      box = new JComboBox(validValues);
      box.setMaximumSize(new Dimension(box.getMaximumSize().width,box.getPreferredSize().height));
      if (isValidValue(getValue())) {
        box.setSelectedItem(getValue());
      }
      else if (validValues.length > 0) {
        box.setSelectedIndex(0);
      }
      box.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
          noUpdate = true;
          setValue(box.getSelectedItem());
          noUpdate = false;
        }
      });
      panel.add(box);
    }
    return panel;
  }

  public void setEnabled(boolean enabled) {
    box.setEnabled(enabled);
  }

  public void setEditable(boolean enabled) {
    box.setEditable(enabled);
  }

  public boolean isValidValue(Object o) {
    for (int i = 0; i < validValues.length; ++i) {
      if (validValues[i].equals(o)) {
        return true;
      }
    }
    return false;
  }

  public String[] getValidValues() {
    return validValues;
  }

  public void setValidValues(String[] s) {
    validValues = s;
    if (box == null) {
      getControls();
    }
  box.setModel(new DefaultComboBoxModel(validValues));
  }

  public void setValue(Object o) {
    if (validValues == null
        || isValidValue(o)) {
      super.setValue(o);
      if (!noUpdate && box != null) {
        box.setSelectedItem(o);
      }
    }
  }

  public String getValueString() {
    return box != null ? (String) box.getSelectedItem() : validValues[0];
  }

  public void setValue(String s) {
    setValue((Object) s);
  }

  public static void main(String[] args) {
    JFrame f = new JFrame();
    StringEnumConfigurer c = new StringEnumConfigurer(null, "Pick one: ", new String[]{"one", "two", "three"});
    c.addPropertyChangeListener(new PropertyChangeListener() {
      public void propertyChange(PropertyChangeEvent evt) {
        System.err.println(evt.getPropertyName() + " = " + evt.getNewValue());
      }
    });
    f.add(c.getControls());
    f.pack();
    f.setVisible(true);
  }
}