import java.awt.*;

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

   public void init() {
      setLayout(new GridLayout(1,3,5,15));
      swatch = new Canvas();
      swatch.setBackground(Color.black);
      RGBcontrols = new ClrCtrl(this, "Red", "Green",     "Blue");
      HSBcontrols = new ClrCtrl(this, "Hue", "Saturation","Brightness");
      add(swatch);
      add(RGBcontrols);
      add(HSBcontrols);
   }
   public Insets insets() {
      return new Insets(10,10,10,10);
   }
   void update(ClrCtrl controlPanel) {
      Color c;
      int val1 = Integer.parseInt(controlPanel.tf1.getText());
      int val2 = Integer.parseInt(controlPanel.tf2.getText());
      int val3 = Integer.parseInt(controlPanel.tf3.getText());
      if (controlPanel==RGBcontrols) { // RGB changed update color as well as HSB values
        c = new Color(val1, val2, val3);
        float[] HSB = Color.RGBtoHSB(val1, val2, val3, (new float[3]));
        HSB[0]*= 360;
        HSB[1]*= 100;
        HSB[2]*= 100;
        HSBcontrols.tf1.setText(String.valueOf((int)HSB[0]));
        HSBcontrols.sc1.setValue((int)HSB[0]);
        HSBcontrols.tf2.setText(String.valueOf((int)HSB[1]));
        HSBcontrols.sc2.setValue((int)HSB[1]);
        HSBcontrols.tf3.setText(String.valueOf((int)HSB[2]));
        HSBcontrols.sc3.setValue((int)HSB[2]);
      } else {  // HSB changed update color as well as RGB value
        c = Color.getHSBColor((float)val1/360, (float)val2/100, (float)val3/100);
        RGBcontrols.tf1.setText(String.valueOf(c.getRed()));
        RGBcontrols.sc1.setValue(c.getRed());
        RGBcontrols.tf2.setText(String.valueOf(c.getGreen()));
        RGBcontrols.sc2.setValue(c.getGreen());
        RGBcontrols.tf3.setText(String.valueOf(c.getBlue()));
        RGBcontrols.sc3.setValue(c.getBlue());
      }
      swatch.setBackground(c);
      swatch.repaint();
   }
}

class ClrCtrl extends Panel {
   TextField tf1, tf2, tf3;
   Scrollbar sc1, sc2, sc3;
   ColorTest applet;

   ClrCtrl(ColorTest parent, String l1, String l2, String l3) {
      applet = parent;	// to access the parent class
      setLayout(new GridLayout(4,3,10,10));
      tf1 = new TextField("0");
      tf1.setEditable(false);
      tf2 = new TextField("0");
      tf2.setEditable(false);
      tf3 = new TextField("0");
      tf3.setEditable(false);
      if (l1.equals("Red")) {
         sc1 = new Scrollbar(Scrollbar.HORIZONTAL,0,0,0,256);
         sc2 = new Scrollbar(Scrollbar.HORIZONTAL,0,0,0,256);
         sc3 = new Scrollbar(Scrollbar.HORIZONTAL,0,0,0,256);
      } else {
         sc1 = new Scrollbar(Scrollbar.HORIZONTAL,0,0,0,361);
         sc2 = new Scrollbar(Scrollbar.HORIZONTAL,0,0,0,101);
         sc3 = new Scrollbar(Scrollbar.HORIZONTAL,0,0,0,101);
      }
      if (l1.equals("Red")) {
        add(new Label(" ",Label.CENTER));
        add(new Label("RGB",Label.CENTER));
        add(new Label(" ",Label.CENTER));
      } else {
        add(new Label(" ",Label.CENTER));
        add(new Label("HSB",Label.CENTER));
        add(new Label(" ",Label.CENTER));
      }
      add(new Label(l1, Label.RIGHT));
      add(tf1);
      add(sc1);
      add(new Label(l2, Label.RIGHT));
      add(tf2);
      add(sc2);
      add(new Label(l3, Label.RIGHT));
      add(tf3);
      add(sc3);
   }
   public Insets insets() {
      return new Insets(10,10,0,0);
   }
   public boolean handleEvent(Event evt) {
      int v;
      if (evt.target instanceof Scrollbar) {
         v = this.sc1.getValue();
         this.tf1.setText(String.valueOf(v));
         v = this.sc2.getValue();
         this.tf2.setText(String.valueOf(v)); 
         v = this.sc3.getValue();
         this.tf3.setText(String.valueOf(v));
         repaint();
         applet.update(this);
         return true;
      } else return false;
   }
}