package de.bht.fb6.cg1.exercise1;
 
import java.awt.Canvas;
import java.awt.Color;
import java.awt.GridLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.JTextField;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
 
/**
 * This class represents the ColorConverter.
 * 
 * An application to convert colors between differen color models.
 * 
 * @author Stephan Rehfeld <rehfeld (-at-) beuth-hochschule.de>
 */
public class ColorConverterJFrame extends JFrame implements ChangeListener {
 
	/**
	 * The main method.
	 * 
	 * @param args Console parameters. This main method does not consume any parameters.
	 */
	public static void main( final String args[] ) {
		java.awt.EventQueue.invokeLater( new Runnable() {
 
			@Override
			public void run() {
				new ColorConverterJFrame().setVisible(true);
			}
 
		});
	}
 
	/**
	 * This attribute indicates that the program is currently updating the slider and should not react on value changes.
	 */
	private boolean update;
 
	/**
	 * This is the canvas that shows the current color.
	 */
	private Canvas colorCanvas;
 
	/**
	 * The current color.
	 */
	private Color currentColor;
 
	/**
	 * The panel that holds all controls for RGB color.
	 */
	private JPanel rgbPanel;
 
	/**
	 * The panel that holds all controls for YUV color.
	 */
	private JPanel yuvPanel;
 
	/**
	 * The panel that holds all controls for CMY color.
	 */
	private JPanel cmyPanel;
 
	/**
	 * This slider controls the r component of RGB.
	 */
	private JSlider rSlider;
 
	/**
	 * This text field shows the current value of the r component of RGB.
	 */
	private JTextField rTextField;
 
	/**
	 * This slider controls the g component of RGB.
	 */
	private JSlider gSlider;
 
	/**
	 * This text field shows the current value of the g component of RGB.
	 */
	private JTextField gTextField;
 
	/**
	 * This slider controls the b component of RGB.
	 */
	private JSlider bSlider;
 
	/**
	 * This text field shows the current value of the b component of RGB.
	 */
	private JTextField bTextField;
 
	/**
	 * This slider controls the y component of YUV.
	 */
	private JSlider ySlider;
 
	/**
	 * This text field shows the current value of the y component of YUV.
	 */
	private JTextField yTextField;
 
	/**
	 * This slider controls the u component of YUV.
	 */
	private JSlider uSlider;
 
	/**
	 * This text field shows the current value of the u component of YUV.
	 */
	private JTextField uTextField;
 
	/**
	 * This slider controls the v component of YUV.
	 */
	private JSlider vSlider;
 
	/**
	 * This text field shows the current value of the v component of YUV.
	 */
	private JTextField vTextField;
 
	/**
	 * This slider controls the c component of CMY.
	 */
	private JSlider cSlider;
 
	/**
	 * This text field shows the current value of the c component of CMY.
	 */
	private JTextField cTextField;
 
	/**
	 * This slider controls the m component of CMY.
	 */
	private JSlider mSlider;
 
	/**
	 * This text field shows the current value of the m component of CMY.
	 */
	private JTextField mTextField;
 
	/**
	 * This slider controls the y component of CMY.
	 */
	private JSlider y2Slider;
 
	/**
	 * This text field shows the current value of the y component of CMY.
	 */
	private JTextField y2TextField;
 
	/**
	 * This constructor creates a new Frame of the ColorConverter with the size 640x480.
	 * It already close it self if requested and has the correct frame title.
	 * 
	 */
	public ColorConverterJFrame() {
		super( "Color Converter" );
		this.update = false;
		this.setSize( 640, 480 );
		this.setDefaultCloseOperation( javax.swing.WindowConstants.EXIT_ON_CLOSE );
 
		this.setLayout( new GridLayout( 0, 1 ) );
 
		this.currentColor = Color.WHITE;
 
		this.createColorCanvas();
		this.createRGBPanel();
		this.createYUVPanel();
		this.createCMYPanel();
 
		this.pack();
 
	}
 
	/**
	 * This method creates the color canvas
	 */
	private void createColorCanvas() {
		this.colorCanvas = new Canvas();
		this.colorCanvas.setBackground( this.currentColor );
		this.add( this.colorCanvas );
 
 
	}
 
	/**
	 * This method creates the panel for RGB
	 */
	private void createRGBPanel() {
		this.rgbPanel = new JPanel();
		this.rgbPanel.setBorder( javax.swing.BorderFactory.createEtchedBorder() );
		this.add( this.rgbPanel );
		this.rgbPanel.setLayout( new GridLayout( 3, 3 ) );
 
		final JLabel rLabel = new JLabel( "R" );
		this.rgbPanel.add( rLabel );
 
		this.rSlider = new JSlider( 0, 255, 255 );
		this.rgbPanel.add( this.rSlider );
		this.rSlider.addChangeListener( this );
 
		this.rTextField = new JTextField();
		this.rgbPanel.add( this.rTextField );
		this.rTextField.setText( "255" );
		this.rTextField.setEnabled( false );
 
		final JLabel gLabel = new JLabel( "G" );
		this.rgbPanel.add( gLabel );
 
		this.gSlider = new JSlider( 0, 255, 255 );
		this.rgbPanel.add( this.gSlider );
		this.gSlider.addChangeListener( this );
 
		this.gTextField = new JTextField();
		this.rgbPanel.add( this.gTextField );
		this.gTextField.setText( "255" );
		this.gTextField.setEnabled( false );
 
		final JLabel bLabel = new JLabel( "B" );
		this.rgbPanel.add( bLabel );
 
		this.bSlider = new JSlider( 0, 255, 255 );
		this.rgbPanel.add( this.bSlider );
		this.bSlider.addChangeListener( this );
 
		this.bTextField = new JTextField();
		this.rgbPanel.add( this.bTextField );
		this.bTextField.setText( "255" );
		this.bTextField.setEnabled( false );
	}
 
	/**
	 * This method creates	 the panel for YUV
	 */
	private void createYUVPanel() {
		this.yuvPanel = new JPanel();
		this.yuvPanel.setBorder( javax.swing.BorderFactory.createEtchedBorder() );
		this.add( this.yuvPanel );
		this.yuvPanel.setLayout( new GridLayout( 3, 3 ) );
 
		final JLabel yLabel = new JLabel( "Y" );
		this.yuvPanel.add( yLabel );
 
		this.ySlider = new JSlider( 0, 255, 255 );
		this.yuvPanel.add( this.ySlider );
		this.ySlider.addChangeListener( this );
 
		this.yTextField = new JTextField();
		this.yuvPanel.add( this.yTextField );
		this.yTextField.setText( "255" );
		this.yTextField.setEnabled( false );
 
		final JLabel uLabel = new JLabel( "U" );
		this.yuvPanel.add( uLabel );
 
		this.uSlider = new JSlider( 0, 255, 255 );
		this.yuvPanel.add( this.uSlider );
		this.uSlider.addChangeListener( this );
 
		this.uTextField = new JTextField();
		this.yuvPanel.add( this.uTextField );
		this.uTextField.setText( "255" );
		this.uTextField.setEnabled( false );
 
		final JLabel vLabel = new JLabel( "V" );
		this.yuvPanel.add( vLabel );
 
		this.vSlider = new JSlider( 0, 255, 255 );
		this.yuvPanel.add( this.vSlider );
		this.vSlider.addChangeListener( this );
 
		this.vTextField = new JTextField();
		this.yuvPanel.add( this.vTextField );
		this.vTextField.setText( "255" );
		this.vTextField.setEnabled( false );
	}
 
	/**
	 * This method creates the panel for RGB
	 */
	private void createCMYPanel() {
		this.cmyPanel = new JPanel();
		this.cmyPanel.setBorder( javax.swing.BorderFactory.createEtchedBorder() );
		this.add( this.cmyPanel );
		this.cmyPanel.setLayout( new GridLayout( 3, 3 ) );
 
		final JLabel cLabel = new JLabel( "C" );
		this.cmyPanel.add( cLabel );
 
		this.cSlider = new JSlider( 0, 255, 255 );
		this.cmyPanel.add( this.cSlider );
		this.cSlider.addChangeListener( this );
 
		this.cTextField = new JTextField();
		this.cmyPanel.add( this.cTextField );
		this.cTextField.setText( "255" );
		this.cTextField.setEnabled( false );
 
		final JLabel mLabel = new JLabel( "M" );
		this.cmyPanel.add( mLabel );
 
		this.mSlider = new JSlider( 0, 255, 255 );
		this.cmyPanel.add( this.mSlider );
		this.mSlider.addChangeListener( this );
 
		this.mTextField = new JTextField();
		this.cmyPanel.add( this.mTextField );
		this.mTextField.setText( "255" );
		this.mTextField.setEnabled( false );
 
		final JLabel y2Label = new JLabel( "Y" );
		this.cmyPanel.add( y2Label );
 
		this.y2Slider = new JSlider( 0, 255, 255 );
		this.cmyPanel.add( this.y2Slider );
		this.y2Slider.addChangeListener( this );
 
		this.y2TextField = new JTextField();
		this.cmyPanel.add( this.y2TextField );
		this.y2TextField.setText( "255" );
		this.y2TextField.setEnabled( false );
	}
 
	@Override
	public void stateChanged( final ChangeEvent e ) {
		if( !this.update ) {
			if( e.getSource() == this.rSlider && Integer.parseInt( this.rTextField.getText() ) != this.rSlider.getValue() ) {
				this.rTextField.setText( "" + this.rSlider.getValue() );
				this.currentColor = new Color( this.rSlider.getValue(), this.currentColor.getGreen(), this.currentColor.getBlue() );
			} else if( e.getSource() == this.gSlider && Integer.parseInt( this.gTextField.getText() ) != this.gSlider.getValue() ) {
				this.gTextField.setText( "" + this.gSlider.getValue() );
				this.currentColor = new Color( this.currentColor.getRed(), this.gSlider.getValue(), this.currentColor.getBlue() );
			} else if( e.getSource() == this.bSlider && Integer.parseInt( this.bTextField.getText() ) != this.bSlider.getValue() ) {
				this.bTextField.setText( "" + this.bSlider.getValue() );
				this.currentColor = new Color( this.currentColor.getRed(), this.currentColor.getGreen(), this.bSlider.getValue() );
 
 
			} else if( e.getSource() == this.ySlider && Integer.parseInt( this.yTextField.getText() ) != this.ySlider.getValue() ) {
				this.yTextField.setText( "" + this.ySlider.getValue() );
				this.currentColor = new Color( this.currentColor.getRed(), this.currentColor.getGreen(),  this.currentColor.getBlue() );
			} else if( e.getSource() == this.uSlider && Integer.parseInt( this.uTextField.getText() ) != this.uSlider.getValue() ) {
				this.uTextField.setText( "" + this.uSlider.getValue() );				
			} else if( e.getSource() == this.vSlider && Integer.parseInt( this.vTextField.getText() ) != this.vSlider.getValue() ) {
				this.vTextField.setText( "" + this.vSlider.getValue() );	
 
 
			} else if( e.getSource() == this.cSlider && Integer.parseInt( this.cTextField.getText() ) != this.cSlider.getValue() ) {
				this.cTextField.setText( "" + this.cSlider.getValue() );
			} else if( e.getSource() == this.mSlider && Integer.parseInt( this.mTextField.getText() ) != this.mSlider.getValue() ) {
				this.mTextField.setText( "" + this.mSlider.getValue() );
			} else if( e.getSource() == this.y2Slider && Integer.parseInt( this.y2TextField.getText() ) != this.y2Slider.getValue() ) {
				this.y2TextField.setText( "" + this.y2Slider.getValue() );
			}
			this.colorCanvas.setBackground( this.currentColor );
			this.update();
		}
	}
 
	/**
	 * This method updates all other components if one component has changed.
	 */
	private void update() {
		this.update = true;
		this.update = false;
	}
}