/* "RevAl_AnimPortrait.java" */
/* <c> 1997 Joe Rosen */
/* java applet, "Rev. Al Sharpton" (Animated Portrait) */

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

public class RevAl_AnimPortrait extends java.applet.Applet implements Runnable {

 /* program constants */

 /* main portrait width and height */
 final int  MAIN_WDTH = 488;
 final int  MAIN_HGHT = 623;

 /* animated portrait top/left */
 final int  ANIM_TOP = 5;
 final int  ANIM_LEFT = 5;

 /* animated portrait width and height */
 final int  ANIM_WDTH = 132;
 final int  ANIM_HGHT = 185;

 /* variables */

 /* font */
 Font          txt_Font;

 /* images */
 /* main portrait gif */
 Image         main_Image;
 /* animated portrait gifs */
 Image         anim_Image[];

 /* animated portrait flip-flop (alternate between 2 images) */
 int           anim_Image_FlipFlop;

 /* Rev. Al, MediaTracker */
 MediaTracker  revAl_MediaTracker;

 /* Rev. Al, offscreen graphics context (composite buffer) */
 Image         offRevAl_Image;
 Graphics      offRevAl_Graphics;

 /* Rev. Al, animation thread */	
 Thread        animation_Thread = null;


 /* methods invoked by Java */

 /* "init()"
  * initialize the applet */
 public void init()
 {

  /* resize canvas */
  resize(MAIN_WDTH + 1,MAIN_HGHT + 1);
  
  /* text font */
  txt_Font = new Font("Helvetica", Font.PLAIN, 9);

  /* create offscreen graphics context, Rev. Al composite buffer */
  offRevAl_Image = createImage(MAIN_WDTH,MAIN_HGHT);
  offRevAl_Graphics = offRevAl_Image.getGraphics();

  /* retrieve .gif images */
  /* main portrait (488W X 623H) */
  main_Image = getImage(getCodeBase(),"images/main_portrait.gif");
  /* anim portrait (132W X 185H) */
  anim_Image = new Image[2];
  anim_Image[0] = getImage(getCodeBase(),"images/anim_portrait_1.gif");
  anim_Image[1] = getImage(getCodeBase(),"images/anim_portrait_2.gif");

  /* init Rev. Al MediaTracker */
  revAl_MediaTracker = new MediaTracker(this);
  /* load images into MediaTracker */
  revAl_MediaTracker.addImage(main_Image,0);
  revAl_MediaTracker.addImage(anim_Image[0],1);
  revAl_MediaTracker.addImage(anim_Image[1],2);

  /* init animated portrait flip-flop (alternate between 2 images) */
  anim_Image_FlipFlop = 0;

 } /* end method "init" */


 /* "start()"
  * called when the applet becomes visible on screen */
 public void start()
 {

  /* start/resume animator thread */
  if (animation_Thread == null) {
   animation_Thread = new Thread(this);
   animation_Thread.start();
  }
  else
   animation_Thread.resume();

 } /* end method "start" */


 /* "run()"
  * called (repeatedly) by the Thread created in "start()" */
 public void run()
 {

  /* update animator thread */
  while (Thread.currentThread() == animation_Thread) {

   /* animated portrait flip-flop (alternate between 2 images */
   if (anim_Image_FlipFlop == 1)
    anim_Image_FlipFlop = 0;
   else
    anim_Image_FlipFlop = 1;

   /* repaint (update) the screen */
   repaint();

   /* begin: thread delay (125 milliseconds) */
   try {
    Thread.sleep(125);
   } catch (InterruptedException e) {
      break;
     } /* end: thread delay */

  } /* end "while (Thread.currentThread() == animation_Thread)" */

 } /* end method "run" */


 /* "stop()"
  * called when the applet is no longer visible on screen */
 public void stop()
 {

  /* suspend animator thread */
  if (animation_Thread != null)
   animation_Thread.suspend();

 } /* end method "stop" */


 /* "destroy()"
  * called when the browsert has closed down or the applet is uncached */
 public void destroy() {

  /* dispose animator thread */
  if (animation_Thread != null)
   animation_Thread = null;

  /* dispose offscreen Graphics Object, Rev. Al composite buffer */
  if (offRevAl_Graphics != null) {
   offRevAl_Graphics.dispose();
   offRevAl_Graphics = null;
  }

 } /* end method "destroy" */


 /* "update()"
  * update the screen */
 public void update(Graphics  g)
 {

  /* (intercepting "update" avoids background erase) */
  /* call "paint" */
  paint(g);

 } /* end method "update" */


 /* "paint()"
  * paint the screen */
 public void paint(Graphics  g)
 {

  /* wait for images to laod before drawing */
  if (revAl_MediaTracker.checkAll(true) == true) {

   /* draw main portrait (in buffer) */
   offRevAl_Graphics.drawImage(main_Image,0,0,this);

   /* draw animated portrait (flip-flop/alternate between 2 images) */
   offRevAl_Graphics.drawImage(anim_Image[anim_Image_FlipFlop],ANIM_LEFT,ANIM_TOP,this);

   /* frame animated portrait */
   offRevAl_Graphics.setColor(Color.black);
   offRevAl_Graphics.drawRect(ANIM_LEFT - 1,ANIM_TOP - 1,ANIM_WDTH,ANIM_HGHT);

  } // end "if (revAl_MediaTracker.checkAll(true) == true)"

  /* begin: write text message, "Loading Images..." */
  else {
   /* fill buffer with white paint */
   offRevAl_Graphics.setColor(Color.white);
   offRevAl_Graphics.fillRect(0,0,MAIN_WDTH,MAIN_HGHT);
   /* set text string font */
   offRevAl_Graphics.setFont(txt_Font);
   /* set text string color */
   offRevAl_Graphics.setColor(Color.black);
   /* write/draw text message */
   offRevAl_Graphics.drawString("Loading Images...",25,25);
  }
  /* end: write text message, "Loading Images..." */

  /* frame entire buffer with black color */
  offRevAl_Graphics.setColor(Color.black);
  offRevAl_Graphics.drawRect(0,0,MAIN_WDTH - 1,MAIN_HGHT - 1);

  /* blast buffer to screen */
  g.drawImage(offRevAl_Image,0,0,this);

 } /* end method "paint" */

} /* end class "RevAl_AnimPortrait" */

/* end file "RevAl_AnimPortrait.java" */