//********************************************************************
//  BarHeights.java       Author: Lewis and Loftus
//  
//  Demonstrates the use of conditionals and loops to guide drawing.
//********************************************************************

import java.applet.Applet;
import java.awt.*;

public class BarHeights extends Applet
{
   private final int NUM_BARS = 10;
   private final int BAR_WIDTH = 30;
   private final int MAX_HEIGHT = 300;
   private final int GAP = 9;

   //-----------------------------------------------------------------
   //  Paints bars of varying heights, tracking the tallest and
   //  shortest bars, which are redrawn in color at the end.
   //-----------------------------------------------------------------
   public void paint (Graphics page)
   {
      int x, height;
      int tallX = 0, tallest = 0, shortX = 0, shortest = MAX_HEIGHT;

      setBackground (Color.black);

      page.setColor (Color.blue);
      x = GAP;

      for (int count = 0; count < NUM_BARS; count++)
      {
         height = (int) (Math.random() * MAX_HEIGHT);
         page.fillRect (x, MAX_HEIGHT-height, BAR_WIDTH, height);

         // Keep track of the tallest and shortest bars
         if (height > tallest)
         {
            tallX = x;
            tallest = height;
         }

         if (height < shortest)
         {
            shortX = x;
            shortest = height;
         }

         x = x + BAR_WIDTH + GAP;
      }

      // Redraw the tallest bar in red
      page.setColor (Color.red);
      page.fillRect (tallX, MAX_HEIGHT-tallest, BAR_WIDTH, tallest);

      // Redraw the shortest bar in yellow 
      page.setColor (Color.yellow);
      page.fillRect (shortX, MAX_HEIGHT-shortest, BAR_WIDTH, shortest);
   }
}