/*
 * Created on 20-Jul-2004 by Ryan McNally
 */

package com.ryanm.config.swing.imp;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JCheckBox;

import com.ryanm.config.Configurator;
import com.ryanm.config.swing.Widget;

/**
 * Controls a boolean variable
 * 
 * @author ryanm
 */
public class BooleanWidget extends Widget<Boolean> implements ActionListener
{
	private JCheckBox checkBox;

	private boolean oldValue;

	/**
	 * Constructs a widget to manipulate a boolean variable
	 * 
	 * @param conf
	 *           The configurator that contains the variable
	 * @param name
	 *           The name of the variable
	 */
	public BooleanWidget( Configurator conf, String name )
	{
		super( conf, name );

		checkBox = new JCheckBox( name );

		Boolean b = ( Boolean ) conf.getValue( name );

		assert b != null : name;

		checkBox.setSelected( b.booleanValue() );

		oldValue = b.booleanValue();

		add( checkBox );
		checkBox.addActionListener( this );

		setEnabled( conf.isGUIEnabled( name ) );
	}

	/**
	 * Used for the ghost instance in the factory
	 */
	public BooleanWidget()
	{
	}

	public void actionPerformed( final ActionEvent e )
	{
		final Boolean value = new Boolean( checkBox.isSelected() );

		if( value.booleanValue() != oldValue )
		{
			oldValue = value.booleanValue();

			applyChange( conf, name, value );
		}
	}

	@Override
	public void updateValue()
	{
		Boolean value = ( Boolean ) conf.getValue( name );

		checkBox.setSelected( value.booleanValue() );
		oldValue = value.booleanValue();
	}

	@Override
	public void setEnabled( boolean enabled )
	{
		if( enabled )
		{
			enabled = conf.isGUIEnabled( name );
		}
		checkBox.setEnabled( enabled );
	}

	@Override
	public void updateRange( Object range )
	{
	}

	@Override
	public Widget newWidget( Configurator conf, String name, Class<? extends Boolean> runtimeType )
	{
		return new BooleanWidget( conf, name );
	}

	@Override
	public Class getType()
	{
		return boolean.class;
	}

}