//ColorChooser2.java
//Demonstrates colors and scrollbars
//uses improved scroller
//Andy Harris, 05/00

import java.awt.*;
import java.applet.*;
import java.awt.event.*;
import Scroller;
public class ColorChooser2 extends Applet implements AdjustmentListener{

  Panel pnlRGB = new Panel();
  Scroller scrRed = new Scroller(Scroller.RGB, "R");
  Scroller scrGreen = new Scroller(Scroller.RGB, "G");
  Scroller scrBlue = new Scroller(Scroller.RGB, "B");

  Panel pnlHSB = new Panel();
  Scroller scrHue = new Scroller(Scroller.HSB, "H");
  Scroller scrSat = new Scroller(Scroller.HSB, "S");
  Scroller scrBright = new Scroller(Scroller.HSB, "B");
  
  
  Label lblColor = new Label();
  
  public void init(){
    pnlRGB.setLayout(new GridLayout(1,0));
    pnlRGB.add(scrRed);
    pnlRGB.add(scrGreen);
    pnlRGB.add(scrBlue);

    pnlHSB.setLayout(new GridLayout(1,0));
    pnlHSB.add(scrHue);
    pnlHSB.add(scrSat);
    pnlHSB.add(scrBright);
      
    setLayout(new BorderLayout());
    add(pnlRGB, BorderLayout.WEST);
    add(lblColor, BorderLayout.CENTER);
    add(pnlHSB, BorderLayout.EAST);
    
    //add listeners
    scrRed.addAdjustmentListener(this);
    scrGreen.addAdjustmentListener(this);
    scrBlue.addAdjustmentListener(this);
    scrHue.addAdjustmentListener(this);
    scrSat.addAdjustmentListener(this);
    scrBright.addAdjustmentListener(this);

  } // end init

  public void adjustmentValueChanged(AdjustmentEvent e){
    Color theColor;
    
    Scrollbar scr = (Scrollbar) e.getSource();
    
    if (scr.getMaximum() == 255){
      //an RGB scroller was hit

      //figure out the color
      theColor= new Color
        (scrRed.getIntValue(),
	 scrGreen.getIntValue(),
	 scrBlue.getIntValue());

      //get a series of HSB values
      float HSBVals[] = Color.RGBtoHSB
        (theColor.getRed(), theColor.getGreen(), theColor.getBlue(), null);

      int hue = (int)(HSBVals[0] * 100);
      int sat = (int)(HSBVals[1] * 100);
      int bright = (int)(HSBVals[2] * 100);
       
      //copy these values to HSB scrollers
      scrHue.setValue(hue);
      scrSat.setValue(sat);
      scrBright.setValue(bright);
       
      
    } else {
      //it was an HSB scroller

      //get the color
      theColor = Color.getHSBColor
	(scrHue.getFloatValue(),
	 scrSat.getFloatValue(),
	 scrBright.getFloatValue());

      //Reset the RGB scrollers to current color
      scrRed.setValue(theColor.getRed());
      scrGreen.setValue(theColor.getGreen());
      scrBlue.setValue(theColor.getBlue());
      
    } // end if

    lblColor.setBackground(theColor);
    
  } // end adjValChanged

} // end class def