// Lars Sorensen  TYJava in 21 Days
// 
//  The Color Test App
//
//  

 import java.awt.*;

 public class ColorTest extends java.applet.Applet
   {
     ColorControls RGBcontrols, HSBcontrols;
     Canvas swatch;

     public void init()
       {
 	 Color theColor = new Color(0,0,0);
         float[] HSB = Color.RGBtoHSB(theColor.getRed(),
                             theColor.getGreen(),theColor.getBlue(),
                             (new float[3]));
         setLayout(new GridLayout(1,3,10,10));

	// the color swatch
	swatch = new Canvas();
	swatch.setBackground(theColor);

	//the control Panels
	RGBcontrols = new ColorControls(this,
           "Red", "Green", "Blue", theColor.getRed(),
 	   theColor.getGreen(), theColor.getBlue());

	HSBcontrols = new ColorControls(this,
           "Hue", "Saturation", "Brightness", 
	   (int)(HSB[0] * 360), (int)(HSB[1] * 100),
	   (int)(HSB[2] * 100));

	add(swatch);
	add(RGBcontrols);
	add(HSBcontrols);

       } // end of init class...

     public Insets insets()
       {
         return new Insets(10,10,10,10);
       }

     void update(ColorControls in)
       {
         Color c;
	 String v1 = in.f1.getText();
	 String v2 = in.f2.getText();
	 String v3 = in.f3.getText();

         if (in == RGBcontrols)
          {
            // change to RGB
            c = new Color(Integer.parseInt(v1),
                          Integer.parseInt(v2),
                          Integer.parseInt(v3));
            swatch.setBackground(c);
	    swatch.repaint();  
            float[] HSB = Color.RGBtoHSB(c.getRed(),c.getGreen(),
                          c.getBlue(), (new float[3]));
	    HSB[0] *= 360;
	    HSB[1] *= 100;
            HSB[2] *= 100;
	   
            HSBcontrols.f1.setText(String.valueOf((int)HSB[0]));
            HSBcontrols.f2.setText(String.valueOf((int)HSB[1]));
            HSBcontrols.f3.setText(String.valueOf((int)HSB[2]));
          }
         else
          {
            // change the HSB
	    int f1 = Integer.parseInt(v1);
	    int f2 = Integer.parseInt(v2);
	    int f3 = Integer.parseInt(v3);
	    c = Color.getHSBColor((float)f1/360,(float)f2/100,(float)f3/100);
	    swatch.setBackground(c);
            swatch.repaint();
	    RGBcontrols.f1.setText(String.valueOf(c.getRed()));
	    RGBcontrols.f2.setText(String.valueOf(c.getGreen()));
	    RGBcontrols.f3.setText(String.valueOf(c.getBlue()));
          }

       } // end of update

   } // end of class ColorTest


  class ColorControls extends Panel
    {
      TextField f1, f2, f3;
      ColorTest outerparent;

      ColorControls(ColorTest target,       // constructor
          String l1, String l2, String l3,
          int v1, int v2, int v3)
       {
	 this.outerparent = target;
         setLayout(new GridLayout(3,4,10,10));

         f1 = new TextField(String.valueOf(v1),10);
         f2 = new TextField(String.valueOf(v2),10);
         f3 = new TextField(String.valueOf(v3),10);

	 add(new Label(l1, Label.RIGHT));
	 add(f1);
	 add(new Label(l2, Label.RIGHT));
	 add(f2);
	 add(new Label(l3, Label.RIGHT));
	 add(f3);
        } 

     public Insets insets()
       {
         return new Insets(10,10,0,0);
       }

     public boolean action(Event evt, Object arg)
       {
         if ( evt.target instanceof TextField)
           {
             this.outerparent.update(this);
             return true;
           }
         else return false;
       }

    } // end of class ColorControls