mangledbuttondemo.java

来自「java 完全探索的随书源码」· Java 代码 · 共 56 行

// MangledButtonDemo.java

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

class MangledButtonDemo extends Frame
{
   MangledButtonDemo (String title)
   {
      super (title);

      addWindowListener (new WindowAdapter ()
                         {
                            public void windowClosing (WindowEvent e)
                            {
                               System.exit (0);
                            }
                         });

      add (new MangledButton ("OK"));

      setSize (200, 100);
      setVisible (true);
   }

   public static void main (String [] args)
   {
      new MangledButtonDemo ("Mangled Button");
   }
}

class MangledButton extends Button
{
   MangledButton (String label)
   {
      super (label);
   }

   public void paint (Graphics g)
   {
      g.setColor (Color.red);

      int w = getSize ().width - 1;
      int h = getSize ().height - 1;

      g.drawLine (0, 0, w, 0);
      g.drawLine (w, 0, w, h);
      g.drawLine (w, h, 0, h);
      g.drawLine (0, h, 0, 0);

      g.drawLine (0, 0, w, h);
      g.drawLine (w, 0, 0, h);
   }
}