Java by Example/jbecd.bin/JBE-CD/NTUsers/JBECODE.ZIP/JavaByExample/chap21/CustomCanvas.class

Java Class File | 1996-03-08 | 992 b | 34 lines

import java.awt.Canvas;
import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Rectangle;

class CustomCanvas extends Canvas {
   Color color;

   public CustomCanvas() {
      this.color = Color.black;
   }

   public void paint(Graphics var1) {
      Rectangle var2 = ((Component)this).bounds();
      var1.setColor(this.color);
      var1.fillRect(0, 0, var2.width, var2.height);
      var1.setColor(Color.white);
      var1.drawString("CANVAS", 72, 90);
   }

   public void swapColor() {
      if (this.color == Color.black) {
         this.color = Color.red;
      } else if (this.color == Color.red) {
         this.color = Color.green;
      } else {
         this.color = Color.black;
      }

      ((Component)this).repaint();
   }
}