package com.algomagic.atn;

import java.util.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.*;


public class ControlPanel 
    extends JPanel 
    implements ActionListener, VisualizationConstants
{

    JButton _play, _pause, _stepForward, _stepBack, _rewind, _fastForward, _stop;
    InternalObservable _observable;
    Visualization _vis;


    public ControlPanel( Properties properties, Visualization vis ) {
	super( );

	_vis = vis;
	_observable = new InternalObservable( );
	Class clazz = this.getClass( );

	_play = new JButton( new ImageIcon( clazz.getResource( "/resources/Play24.gif" ), "play" ) );
	_play.setActionCommand( "play" );
	_play.addActionListener( this );
	_play.setEnabled( true );

	_pause = new JButton( new ImageIcon( clazz.getResource( "/resources/Pause24.gif" ), "pause" ) );
	_pause.setActionCommand( "pause" );
	_pause.addActionListener( this );
	_pause.setEnabled( false );

	_stepForward = new JButton( new ImageIcon( clazz.getResource( "/resources/StepForward24.gif" ), "step forward" ) );
	_stepForward.setActionCommand( "stepf" );
	_stepForward.addActionListener( this );
	_stepForward.setEnabled( true );
	_stepForward.setMnemonic( 70 );


	_stepBack = new JButton( new ImageIcon( clazz.getResource( "/resources/StepBack24.gif" ), "step back" ) );
	_stepBack.setActionCommand( "stepb" );
	_stepBack.addActionListener( this );
	_stepBack.setEnabled( true );
	_stepBack.setMnemonic( 66 );


	_rewind = new JButton( new ImageIcon( clazz.getResource( "/resources/Rewind24.gif" ), "rewind" ) );
	_rewind.setActionCommand( "rewind" );
	_rewind.addActionListener( this );
	_rewind.setEnabled( true );
	


	_fastForward = new JButton( new ImageIcon( clazz.getResource( "/resources/FastForward24.gif" ), "fast forward" ) );
	_fastForward.setActionCommand( "ff" );
	_fastForward.addActionListener( this );
	_fastForward.setEnabled( true );


	setStyle( _play );
	setStyle( _pause );
	setStyle( _stepForward );
	setStyle( _stepBack );
	setStyle( _rewind );
	setStyle( _fastForward );

	setLayout( new BoxLayout( this, BoxLayout.X_AXIS ) );
	add( _rewind );
	add( _stepBack );
	add( _play );
	add( _pause );
	add( _stepForward );
	add( _fastForward );

	JCheckBox loop = 
	    new JCheckBox( "loop", (new Boolean( properties.getProperty( LOOP_PROP, LOOP_DEFAULT ) )).booleanValue( ) );

	loop.addItemListener( new ItemListener( ) {
		public void itemStateChanged( ItemEvent e ) {
		    int s = e.getStateChange( );
		    Boolean state = Boolean.TRUE;

		    if( s == ItemEvent.DESELECTED ) {
			state = Boolean.FALSE;
		    }
			
		    _observable.notify( state );

		}
	    } );


	add( Box.createHorizontalStrut( 10 ) );
	add( loop );


	JCheckBox raise = 
	    new JCheckBox( "auto raise", true );
	raise.addItemListener( new ItemListener( ) {

		public void itemStateChanged( ItemEvent e ) {
		    int s = e.getStateChange( );
		    boolean state = true;

		    if( s == ItemEvent.DESELECTED ) {
			state = false;
		    }
		    
		    _vis.setAutoRaise( state );
		}



	    } );


	add( Box.createHorizontalStrut( 10 ) );
	add( raise );



	JSpinner spinner = 
	    new JSpinner( new SpinnerNumberModel( Integer.parseInt( properties.getProperty( DELAY_PROP, DELAY_DEFAULT ) ), 
						  0, 
						  5000, 
						  100 ) );


	JLabel spinnerLabel = new JLabel( "delay (msec)" );

	spinner.addChangeListener( new ChangeListener( ) {
		public void stateChanged( ChangeEvent e ) {
		    _observable.notify( e.getSource( ) );
		}
	    } );


	add( spinner );
	add( Box.createHorizontalStrut( 5 ) );
	add( spinnerLabel );


	PanelHelper.setBorder( this, "Controls" );
    }


    public void addObserver( Observer o ) {
	_observable.addObserver( o );
    }


    private void setStyle( JButton b ) {
	b.setMinimumSize( new Dimension( 24, 24 ) );
	b.setMaximumSize( new Dimension( 24, 24 ) );
	b.setPreferredSize( new Dimension( 24, 24 ) );
	    
	b.setBorderPainted( false );
    }

    public void actionPerformed( ActionEvent e ) {
	String cmd = e.getActionCommand( );
	if( cmd.equals( "play" ) ) {
	    _stepForward.setEnabled( false );
	    _stepBack.setEnabled( false );
	    _rewind.setEnabled( false );
	    _fastForward.setEnabled( false );
	    _play.setEnabled( false );
	    _pause.setEnabled( true );
	}

	else if( cmd.equals( "pause" ) ) {
	    _stepForward.setEnabled( true );
	    _stepBack.setEnabled( true );
	    _rewind.setEnabled( true );
	    _fastForward.setEnabled( true );
	    _play.setEnabled( true );
	    _pause.setEnabled( false );
	}


	_observable.notify( e.getActionCommand( ) );
    }


    private class InternalObservable extends Observable {
	public void notify( Object arg ) {
	    setChanged( );
	    notifyObservers( arg );
	}
    }

}