//Red.java
//Demonstrates Layout of Red only
//Andy Harris, 05/00

import java.awt.*;
import java.applet.*;
import java.awt.event.*;

public class Red extends Applet implements AdjustmentListener{

  Label lblOutput = new Label();
  
  Panel pnlRed = new Panel();
  Scrollbar scrRed = new Scrollbar (Scrollbar.VERTICAL, 0, 1, 0, 256);
  Label lblRed = new Label("0");

  public void init(){
    setLayout(new BorderLayout());
    add(pnlRed, BorderLayout.WEST);
    add(lblOutput, BorderLayout.CENTER);

    pnlRed.setLayout(new BorderLayout());
    pnlRed.add(new Label("R"), BorderLayout.NORTH);
    pnlRed.add(scrRed, BorderLayout.CENTER);
    pnlRed.add(lblRed, BorderLayout.SOUTH);

    //add listeners
    scrRed.addAdjustmentListener(this);
    
  } // end init

  public void adjustmentValueChanged(AdjustmentEvent e){
    int red = scrRed.getValue();
    lblRed.setText(String.valueOf(red));
    
    //for now, leave green and blue to zero		   
    Color theColor = new Color (red, 0, 0);
    lblOutput.setBackground(theColor);
  } // end adjValChanged

} // end class def