/*
 * @(#)DefaultHSBChooserPanel.java	1.7 00/02/02
 *
 * Copyright 1997-2000 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * This software is the proprietary information of Sun Microsystems, Inc.  
 * Use is subject to license terms.
 * 
 */


package javax.swing.colorchooser; 

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.event.*;
import javax.swing.text.*;
import javax.swing.border.*;
import java.awt.image.*;

/**
 * Implements the default HSB Color chooser
 *
 *  @version 1.7 02/02/00
 *  @author Tom Santos
 *  @author Steve Wilson
 */
class DefaultHSBChooserPanel extends AbstractColorChooserPanel {

    float[] hsb = new float[ 3 ];
    AbstractHSBImage palette;
    AbstractHSBImage sliderPalette;
    JSlider slider;
    JIntegerTextField hField; 
    JIntegerTextField sField;
    JIntegerTextField bField;

    JTextField redField; 
    JTextField greenField;
    JTextField blueField;

    boolean isAdjusting = false;
    boolean isUpdatingOften = false;
    Point paletteSelection = new Point();
    JLabel paletteLabel;
    JLabel sliderPaletteLabel;

    JRadioButton hRadio;
    JRadioButton sRadio;
    JRadioButton bRadio;

    Image paletteImage;
    Image sliderImage;

    static final int PALETTE_DIMENSION = 200;
    static final int MAX_HUE_VALUE = 359;
    static final int MAX_SATURATION_VALUE = 99;
    static final int MAX_BRIGHTNESS_VALUE = 99;

    int sliderType = HUE_SLIDER;

    static final int HUE_SLIDER = 0;
    static final int SATURATION_SLIDER = 1;
    static final int BRIGHTNESS_SLIDER = 2;

    public DefaultHSBChooserPanel() {
        super();
    }

    protected void repaintPaletteSelection() {
        paletteLabel.repaint(); 
    }

    protected void addPaletteListeners() {
        paletteLabel.addMouseListener( new MouseAdapter(){
                                       public void mousePressed( MouseEvent e ){
                                       palette.getHSBForLocation( e.getX(), e.getY(), hsb );
                                     updateHSB( hsb[0], hsb[1], hsb[2] );}});

        paletteLabel.addMouseMotionListener( new MouseMotionAdapter(){
                                             public void mouseDragged( MouseEvent e ){
                                             int labelWidth = paletteLabel.getWidth();

                                           int labelHeight = paletteLabel.getHeight();
                                           int x = e.getX();
                                           int y = e.getY();

                                           if ( x >= labelWidth ){
                                           x = labelWidth - 1;}

                                           if ( y >= labelHeight ){
                                           y = labelHeight - 1;}

                                           if ( x < 0 ){
                                           x = 0;}

                                           if ( y < 0 ){
                                           y = 0;}
					   //System.out.println(palette);
                                           palette.getHSBForLocation( x, y, hsb );
                                           updateHSB( hsb[0], hsb[1], hsb[2] );}});
    }

    protected void addSliderListeners() {
        slider.addChangeListener( new ChangeListener(){
                                  public void stateChanged( ChangeEvent e ){
                                  boolean modelIsAdjusting = slider.getModel().getValueIsAdjusting();
                                if ( (modelIsAdjusting && isUpdatingOften) || !modelIsAdjusting ){ 

                                int sliderValue = slider.getValue();
                                int sliderRange = slider.getMaximum() + 1;
                                float value = (float)sliderValue / (float)sliderRange;

                                int x = paletteSelection.x;
                                int y = paletteSelection.y;
                                palette.getHSBForLocation( x, y, hsb );

                                switch ( sliderType ){case HUE_SLIDER:
                                updateHSB( value, hsb[1], hsb[2] );
                                break;case SATURATION_SLIDER:
                                updateHSB( hsb[0], value, hsb[2] );
                                break;case BRIGHTNESS_SLIDER:
                                updateHSB( hsb[0], hsb[1], value );
                                break;}}}});
    }

    protected void updatePalette( float h, float s, float b ) {
        int x = 0;
        int y = 0;

        switch ( sliderType ) {
        case HUE_SLIDER:
            if ( h != palette.getHue() ) {
                palette.setHue( h );
                palette.nextFrame( 0 );
            }
            x = PALETTE_DIMENSION - (int)(s * PALETTE_DIMENSION);
            y = PALETTE_DIMENSION - (int)(b * PALETTE_DIMENSION);
            break;
        case SATURATION_SLIDER:
            if ( s != palette.getSaturation() ) {
                palette.setSaturation( s );
                palette.nextFrame( 0 );
            }
            x = (int)(h * PALETTE_DIMENSION);
            y = PALETTE_DIMENSION - (int)(b * PALETTE_DIMENSION);
            break;
        case BRIGHTNESS_SLIDER:
            if ( b != palette.getBrightness() ) {
                palette.setBrightness( b );
                palette.nextFrame( 0 );
            }
            x = (int)(h * PALETTE_DIMENSION);
            y = PALETTE_DIMENSION - (int)(s * PALETTE_DIMENSION);
            break;
        }

        paletteSelection.setLocation( x, y );
        repaintPaletteSelection();
    }

    protected void updateSliderPalette( float h, float s, float b ) {
        if ( sliderType != HUE_SLIDER && h != sliderPalette.getHue() ) {
            sliderPalette.setHue( h );
            sliderPalette.nextFrame( 0 );
        }
    }

    protected void updateSlider( float h, float s, float b ) {
        float value = 0f;

        switch ( sliderType ) {
        case HUE_SLIDER:
            value = h;
            break;
        case SATURATION_SLIDER:
            value = s;
            break;
        case BRIGHTNESS_SLIDER:
            value = b;
            break;
        }

        slider.setValue( Math.round(value * (slider.getMaximum()+1)) );
    }

    protected void updateHSBTextFields( float hue, float saturation, float brightness ) {
        int h =  Math.round(hue * 359); 
        int s =  Math.round(saturation * 100); 
        int b =  Math.round(brightness * 100); 

        if ( hField.getIntegerValue() != h ) {
            hField.setText( String.valueOf( h ) );
        }
        if ( sField.getIntegerValue() != s ) {
            sField.setText( String.valueOf( s ) );
        }
        if ( bField.getIntegerValue() != b ) {
            bField.setText( String.valueOf( b ) );
        }
    }

    protected void updateRGBTextFields( Color color ) {
	redField.setText(String.valueOf(color.getRed()));
	greenField.setText(String.valueOf(color.getGreen()));
	blueField.setText(String.valueOf(color.getBlue()));
    }

    protected void updateHSB( float h, float s, float b ) {
        if ( !isAdjusting ) {
            isAdjusting = true;

            updatePalette( h, s, b );
            updateSliderPalette( h, s, b );
            updateSlider( h, s, b );
            updateHSBTextFields( h, s, b );

            Color color = new Color( palette.getRGBForLocation( paletteSelection.x, paletteSelection.y ) );

            updateRGBTextFields( color );

            getColorSelectionModel().setSelectedColor( color );

            isAdjusting = false;
        }
    }

    public void updateChooser() {
        if ( !isAdjusting ) {
            Color color = getColorFromModel();
            Color.RGBtoHSB( color.getRed(), color.getGreen(), color.getBlue(), hsb );

            updateHSB( hsb[0], hsb[1], hsb[2] ); 
        }
    }

    protected void buildChooser() {
        Color color = getColorFromModel();
        Color.RGBtoHSB( color.getRed(), color.getGreen(), color.getBlue(), hsb );
	
	setLayout(new BorderLayout());
	JComponent spp = buildSliderPalettePanel();
	add(spp, BorderLayout.WEST);

	JPanel controlHolder = new JPanel(new SmartGridLayout(1,3));
	JComponent hsbControls = buildHSBControls();
	controlHolder.add(hsbControls);

	controlHolder.add(new JLabel(" ")); // spacer

	JComponent rgbControls = buildRGBControls();
	controlHolder.add(rgbControls);

	controlHolder.setBorder(new EmptyBorder( 10, 5, 10, 5));
	add( controlHolder, BorderLayout.CENTER);


    }

    protected JComponent buildRGBControls() {
        JPanel panel = new JPanel(new SmartGridLayout(2,3));

	Color color = getColorFromModel();
        redField = new JTextField( String.valueOf(color.getRed()) );
	redField.setEditable(false);

        greenField = new JTextField(String.valueOf(color.getGreen()) );
	greenField.setEditable(false);

        blueField = new JTextField( String.valueOf(color.getBlue()) );
	blueField.setEditable(false);

	String redString = UIManager.getString("ColorChooser.hsbRedText");
	String greenString = UIManager.getString("ColorChooser.hsbGreenText");
	String blueString = UIManager.getString("ColorChooser.hsbBlueText");

	panel.add( new JLabel(redString) );
	panel.add( redField );
	panel.add( new JLabel(greenString) );
	panel.add( greenField );
	panel.add( new JLabel(blueString) );
	panel.add( blueField );
	
	return panel;		  
    }

    protected JComponent buildHSBControls() {

	String hueString = UIManager.getString("ColorChooser.hsbHueText");
	String saturationString = UIManager.getString("ColorChooser.hsbSaturationText");
	String brightnessString = UIManager.getString("ColorChooser.hsbBrightnessText");

        JPanel panel = new JPanel( new SmartGridLayout(2, 3) );
	
        hField = new JIntegerTextField( 0, 359, (int)(hsb[0] * 359) );
        sField = new JIntegerTextField( 0, 100, (int)(hsb[1] * 100 ) );
        bField = new JIntegerTextField( 0, 100, (int)(hsb[2] * 100 ) );

	ButtonGroup group = new ButtonGroup();
	hRadio = new JRadioButton(hueString);
	group.add(hRadio);
	hRadio.addActionListener( new ActionListener() {
	  public void actionPerformed (ActionEvent e) {
	      setHueMode();
	  }} );

	sRadio = new JRadioButton(saturationString);
	group.add(sRadio);

	sRadio.addActionListener( new ActionListener() {
	  public void actionPerformed (ActionEvent e) {
	      setSaturationMode();
	  }} );

	bRadio = new JRadioButton(brightnessString);
	group.add(bRadio);

	bRadio.addActionListener( new ActionListener() {
	  public void actionPerformed (ActionEvent e) {
	      setBrightnessMode();
	  }} );

	hRadio.setSelected(true);
        NumberListener fieldListener = new NumberListener();
        hField.getDocument().addDocumentListener( fieldListener );
        sField.getDocument().addDocumentListener( fieldListener );
        bField.getDocument().addDocumentListener( fieldListener );

	panel.add(hRadio);
	panel.add(hField);
	panel.add(sRadio);
	panel.add(sField);
	panel.add(bRadio);
	panel.add(bField);

	return panel;

    }

    protected void setHueMode() {
        sliderType = HUE_SLIDER;
        slider.setInverted( true );
	slider.setMaximum( MAX_HUE_VALUE );
        palette = new SaturationBrightnessImage( PALETTE_DIMENSION, PALETTE_DIMENSION, hsb[ 0 ] );
        sliderPalette = new HueImage( 16, PALETTE_DIMENSION );


	paletteImage.flush();
	sliderImage.flush();
        paletteImage = Toolkit.getDefaultToolkit().createImage( palette );
        sliderImage = Toolkit.getDefaultToolkit().createImage( sliderPalette );
        paletteLabel.setIcon( new ImageIcon( paletteImage ) );
        sliderPaletteLabel.setIcon( new ImageIcon( sliderImage ) );


	updateHSB(hsb[0], hsb[1], hsb[2]);

	repaint();

    }

    protected void setSaturationMode() {
        sliderType = SATURATION_SLIDER;
        slider.setInverted( false );
	slider.setMaximum( MAX_SATURATION_VALUE );
        palette  = new HueBrightnessImage( PALETTE_DIMENSION, PALETTE_DIMENSION, hsb[0], hsb[1] );
	sliderPalette = new SaturationImage( 16, PALETTE_DIMENSION, hsb[0] );


	paletteImage.flush();
	sliderImage.flush();
        paletteImage = Toolkit.getDefaultToolkit().createImage( palette );
        sliderImage = Toolkit.getDefaultToolkit().createImage( sliderPalette );
        paletteLabel.setIcon( new ImageIcon( paletteImage ) );
        sliderPaletteLabel.setIcon( new ImageIcon( sliderImage ) );

	updateHSB(hsb[0], hsb[1], hsb[2]);


	repaint();

    }

    protected void setBrightnessMode() {
        sliderType = BRIGHTNESS_SLIDER;
        slider.setInverted( false );
	slider.setMaximum( MAX_BRIGHTNESS_VALUE );
        palette =  new HueSaturationImage( PALETTE_DIMENSION, PALETTE_DIMENSION, hsb[0], hsb[2] );
	sliderPalette = new BrightnessImage( 16, PALETTE_DIMENSION, hsb[0] );

	paletteImage.flush();
	sliderImage.flush();
        paletteImage = Toolkit.getDefaultToolkit().createImage( palette );
        sliderImage = Toolkit.getDefaultToolkit().createImage( sliderPalette );
        paletteLabel.setIcon( new ImageIcon( paletteImage ) );
        sliderPaletteLabel.setIcon( new ImageIcon( sliderImage ) );

	updateHSB(hsb[0], hsb[1], hsb[2]);


	repaint();

    }

    protected JComponent buildSliderPalettePanel() {

        JPanel panel = new JPanel();
	 palette = new SaturationBrightnessImage( PALETTE_DIMENSION, PALETTE_DIMENSION, hsb[ 0 ] );
	 // palette = new HueBrightnessImage( PALETTE_DIMENSION, PALETTE_DIMENSION, hsb[0], hsb[1] );
        //palette = new HueSaturationImage( PALETTE_DIMENSION, PALETTE_DIMENSION, hsb[0], hsb[2] );
        sliderPalette = new HueImage( 16, PALETTE_DIMENSION );
        //sliderPalette = new SaturationImage( 16, PALETTE_DIMENSION, hsb[0] );
        //sliderPalette = new BrightnessImage( 16, PALETTE_DIMENSION, hsb[0] );

        // This slider has to have a minimum of 0.  A lot of math in this file is simplified due to this. 
        slider = new JSlider( JSlider.VERTICAL, 0, MAX_HUE_VALUE, 0 );
        slider.setPaintTrack( false );
        Dimension prefSize = slider.getPreferredSize();
        slider.setPreferredSize( new Dimension( prefSize.width, PALETTE_DIMENSION + 15 ) );
        slider.setInverted( true );
        addSliderListeners();

        paletteLabel = createPaletteLabel();
        paletteImage = Toolkit.getDefaultToolkit().createImage( palette );
        paletteLabel.setIcon( new ImageIcon( paletteImage ) );
        addPaletteListeners();

        panel.add( paletteLabel );
        panel.add( slider );

        sliderPaletteLabel = new JLabel();
        sliderImage = Toolkit.getDefaultToolkit().createImage( sliderPalette );
        sliderPaletteLabel.setIcon( new ImageIcon( sliderImage ) );

        panel.add( sliderPaletteLabel );

	return panel;
    }

    protected JLabel createPaletteLabel() {
        return new JLabel() {
            protected void paintComponent( Graphics g ) {
                super.paintComponent( g );
                g.setColor( Color.white );
                g.drawOval( paletteSelection.x - 4, paletteSelection.y - 4, 8, 8 );
            }
        };
    }

    public String getDisplayName() {
        return UIManager.getString("ColorChooser.hsbNameText");
    }

    public Icon getSmallDisplayIcon() {
        return null;
    }

    public Icon getLargeDisplayIcon() {
        return null;
    }

    class NumberListener implements DocumentListener {
        public void insertUpdate(DocumentEvent e) {updatePanel(e);}
        public void removeUpdate(DocumentEvent e) {updatePanel(e);}
        public void changedUpdate(DocumentEvent e) {}

        private void updatePanel(DocumentEvent e) {
            float hue = (float)hField.getIntegerValue() / 359f;
            float saturation = (float)sField.getIntegerValue() / 100f;
            float brightness = (float)bField.getIntegerValue() / 100f;

            updateHSB( hue, saturation, brightness );
        }
    }





    abstract class AbstractHSBImage extends SyntheticImage {
        protected float h = .0f;
        protected float s = .0f;
        protected float b = .0f;
        protected float[] hsb = new float[3];
        protected boolean isDirty = true;

        protected AbstractHSBImage( int width, int height, float h, float s, float b ) {
            super( width, height );
            setHSB( h, s, b );
        }

        public void setHSB( float h, float s, float b ) {
            setHue( h );
            setSaturation( s );
            setBrightness( b );
        }

        public final void setHue( float hue ) {
            h = hue;
        }

        public final void setSaturation( float saturation ) {
            s = saturation;
        }

        public final void setBrightness( float brightness ) {
            b = brightness;
        }

        public final float getHue() {
            return h;
        }

        public final float getSaturation() {
            return s;
        }

        public final float getBrightness() {
            return b;
        }

        protected boolean isStatic() {
            return false;
        }

        public synchronized void nextFrame( int param ) {
            isDirty = true;
            notifyAll();
        }

        public int getRGBForMouseEvent( MouseEvent e ) {
            return getRGBForLocation( e.getX(), e.getY() );
        }

        public int getRGBForLocation( int x, int y ) {
            getHSBForLocation( x, y, hsb );
            return HSBtoRGB( hsb[0], hsb[1], hsb[2] );
        }

        public abstract void getHSBForLocation( int x, int y, float[] hsbArray ); 

        public synchronized void addConsumer(ImageConsumer ic){
	    isDirty = true;
	    super.addConsumer( ic );
	}
      
        protected void computeRow( int y, int[] row ) {

            if ( y == 0 ) {
                synchronized ( this ) {
                    try {
                        while ( !isDirty ) {
		          wait();

                        }
                    } catch ( Exception e ) {System.out.println( e );}


 		    isDirty = false;
                }
            }  


            for ( int i = 0; i < row.length; ++i ) {
                row[i] = getRGBForLocation( i, y );
            }  


        }

        // An optimized version of Color.HSBtoRGB
        protected int HSBtoRGB( float hue, float saturation, float brightness) {
            int r = 0, g = 0, b = 0;
            if (saturation == 0) {
                r = g = b = (int) (brightness * 255);
            } else {
                double scaledBrightness = brightness*255.0;
                int iScaledBrightness = (int) scaledBrightness;
                double h = hue>=0 ? (hue - (int)hue) : (hue - Math.floor(hue));
                h *= 6.0;
                int ih = (int) h;  // floor not necessary because h>=0
                double f = h - ih;
                int p = (int)(scaledBrightness * (1.0 - saturation));
                int q = (int)(scaledBrightness * (1.0 - saturation * f));
                int t = (int)(scaledBrightness * (1.0 - (saturation * (1.0 - f))));
                switch (ih) {
                case 0:
                    r = iScaledBrightness;
                    g = t;
                    b = p;
                    break;
                case 1:
                    r = q;
                    g = iScaledBrightness;
                    b = p;
                    break;
                case 2:
                    r = p;
                    g = iScaledBrightness;
                    b = t;
                    break;
                case 3:
                    r = p;
                    g = q;
                    b = iScaledBrightness;
                    break;
                case 4:
                    r = t;
                    g = p;
                    b = iScaledBrightness;
                    break;
                case 5:
                    r = iScaledBrightness;
                    g = p;
                    b = q;
                    break;
                }
            }
            return 0xff000000 | (r << 16) | (g << 8) | (b << 0);
        }
    }





  // Square for H
    class SaturationBrightnessImage extends AbstractHSBImage {
        public SaturationBrightnessImage( int width, int height, float hue ) {
            super( width, height, hue, 1.0f, 1.0f );
        }

        public void getHSBForLocation( int x, int y, float[] hsbArray ) {
            float saturationStep = ((float)x) / width;
            float brightnessStep = ((float)y) / height;
            hsbArray[0] = h;
            hsbArray[1] = s - saturationStep; 
            hsbArray[2] = b - brightnessStep;
        }
    }

  // Square for S
    class HueBrightnessImage extends AbstractHSBImage {
        public HueBrightnessImage( int width, int height, float h, float s ) {
            super( width, height, h, s, 1.0f );
        }

        public void getHSBForLocation( int x, int y, float[] hsbArray ) {
            float brightnessStep = ((float)y) / height;
            float step = 1.0f / ((float)width);
            hsbArray[0] = x * step;
            hsbArray[1] = s;
            hsbArray[2] = 1.0f - brightnessStep;
        }
    }

  // Square for B
    class HueSaturationImage extends AbstractHSBImage {
        public HueSaturationImage( int width, int height, float h, float b ) {
            super( width, height, h, 1.0f, b );
        }

        public void getHSBForLocation( int x, int y, float[] hsbArray ) {
            float saturationStep = ((float)y) / height;
            float step = 1.0f / ((float)width);
            hsbArray[0] = x * step;
            hsbArray[1] = 1.0f - saturationStep;
            hsbArray[2] = b;
        }
    }

  // Slider for B
    class BrightnessImage extends AbstractHSBImage {
        protected int cachedY = -1;
        protected int cachedColor = 0;

        public BrightnessImage( int width, int height, float hue ) {
            super( width, height, hue, 1.0f, 1.0f );
        }

        public int getRGBForLocation( int x, int y ) {
            if ( y == cachedY ) {
            } else {
                cachedY = y;
                cachedColor = super.getRGBForLocation( x, y );
            }

            return cachedColor;
        }

        public void getHSBForLocation( int x, int y, float[] hsbArray ) {
            float brightnessStep = ((float)y) / height;
            hsbArray[0] = h;
            hsbArray[1] = s;
            hsbArray[2] = b - brightnessStep;
        }
    }

  // Slider for S
    class SaturationImage extends AbstractHSBImage {
        protected int cachedY = -1;
        protected int cachedColor = 0;

        public SaturationImage( int width, int height, float hue ) {
            super( width, height, hue, 1.0f, 1.0f );
        }

        public int getRGBForLocation( int x, int y ) {
            if ( y == cachedY ) {
            } else {
                cachedY = y;
                cachedColor = super.getRGBForLocation( x, y );
            }

            return cachedColor;
        }

        public void getHSBForLocation( int x, int y, float[] hsbArray ) {
            float saturationStep = ((float)y) / height;
            hsbArray[0] = h;
            hsbArray[1] = s - saturationStep;
            hsbArray[2] = b;
        }
    }

  // Slider for H
    class HueImage extends AbstractHSBImage {
        public HueImage( int width, int height ) {
            super( width, height, 0f, 1.0f, 1.0f );
        }

        protected boolean isStatic() {
            return true;
        }

        public void getHSBForLocation( int x, int y, float[] hsbArray ) {
            float step = 1.0f / ((float)height);
            hsbArray[0] = y * step;
            hsbArray[1] = s;
            hsbArray[2] = b;
        }
    }

}