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  Polled Input Implementation  (Read 813 times)
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Offline Vasari

Junior Newbie





« Posted 2013-07-20 03:39:40 »

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public class Input implements KeyListener, MouseMotionListener, MouseListener {
   private HashMap<Integer, Inputs> inputs = new HashMap<Integer, Inputs>();
   public int mouseX, mouseY;

   public void update() {
      for (Map.Entry<Integer, Inputs> entry : inputs.entrySet()){
         entry.getValue().update();
      }
   }

   public boolean isDown(int keyCode) {
      Inputs input = inputs.get(keyCode);
      if(input != null){
         return input.isDown;
      }
      else return false;
   }

   public boolean isClicked(int keyCode) {
      Inputs input = inputs.get(keyCode);
      if(input != null){
         return input.isClicked;
      }
      else return false;
   }

   public void keyPressed(KeyEvent ke) {
      int keyCode = ke.getKeyCode();
      if(!inputs.containsKey(keyCode)){
         Inputs input = new Inputs();
         input.toggle(true);
         inputs.put(keyCode, input);
      }
      else inputs.get(keyCode).toggle(true);
   }

   public void keyReleased(KeyEvent ke) {
      inputs.get(ke.getKeyCode()).toggle(false);
   }

   public void mousePressed(MouseEvent mo) {
      int mouseCode = mo.getButton();
      if(!inputs.containsKey(mouseCode)){
         Inputs input = new Inputs();
         input.toggle(true);
         inputs.put(mouseCode, input);
      }
      else inputs.get(mouseCode).toggle(true);
   }

   public void mouseReleased(MouseEvent mo) {
      inputs.get(mo.getButton()).toggle(false);
   }

   public void mouseMoved(MouseEvent arg0) {
      mouseX = arg0.getX() / Engine.SCALE;
      mouseY = arg0.getY() / Engine.SCALE;
   }

   public void keyTyped(KeyEvent ke) {
   }

   public void mouseClicked(MouseEvent arg0) {

   }

   public void mouseEntered(MouseEvent arg0) {

   }

   public void mouseExited(MouseEvent arg0) {

   }

   public void mouseDragged(MouseEvent arg0) {

   }

   public class Inputs {
      private int presses, absorbs;
      public boolean isDown, isClicked;

      public void toggle(boolean pressed) {
         if(pressed != isDown) isDown = pressed;
         if(pressed) presses++;
      }

      public void update() {
         if(absorbs < presses){
            absorbs++;
            isClicked = true;
         }
         else isClicked = false;
      }
   }
}


So I've experimented in different implementations of getting input from the user. This current implementation allows me to poll for constant input and also achieve a psuedo event system with the isClicked method. Also, with the addition of a hash map, I can check for any java KeyEvent or MouseEvent very quickly. Is there anything else that can be improved? I've been through many implementations, adding on what I learn over time, and I'll be glad to take any advice.
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