wombatactor.java

来自「《J2ME Game Programming》随书光盘源代码」· Java 代码 · 共 50 行

import javax.microedition.lcdui.Graphics;

/**
 * The main player actor, the Wombat.
 * @author Martin J. Wells
 */
public class WombatActor extends Actor
{
   /**
    * Constructs a new WombatActor object using the specified GameScreen and
    * position.
    * @param gsArg The GameScreen this Actor is associated with.
    * @param xArg The x starting position.
    * @param yArg The y starting position.
    */
   public WombatActor(GameScreen gsArg, int xArg, int yArg)
   {
      super(gsArg, xArg, yArg);
   }

   /**
    * Renders the actor to the screen by drawing a rectangle.
    * @param graphics The graphics context to draw to.
    */
   public void render(Graphics graphics)
   {
      graphics.setColor(0x0044FF44);
      graphics.fillRect(getX(), getY(), getActorWidth(), getActorHeight());
   }

   /**
    * An overridden version of the Actor setX method in order to stop the
    * wrapping it does. You want the wombat to stop on the edge of the screen.
    * @param newX The new x position.
    */
   public void setX(int newX)
   {
      super.setX(newX);

      // non-wrapping version for the wombat
      if (getX() < 0)
         setX(0);

      if (getX() > gameScreen.getWidth()-getActorWidth()-2)
         setX(gameScreen.getWidth() - getActorWidth()-2);
   }


}