Android Open Source - BobEngine An Object

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License

The source code is released under:

GNU Lesser General Public License

Java Source Code

package bobby.engine.touchinput;
/*from   www  .j  a v a  2  s  . c  o m*/
import bobby.engine.bobengine.GameObject;
import bobby.engine.bobengine.Room;

public class AnObject extends GameObject {

  public AnObject(int id, Room containingRoom) {
    super(id, containingRoom);
    // TODO Initialization
    
    /* Set graphic and number of frames to use for this icon */
    setGraphic(GameView.icon, 1);
  }

  /**
   * Set up or reset this object.
   */
  public void set() {
    x = getRoom().getWidth() / 2;
    y = getRoom().getHeight() / 2;
    
    width = height = getRoom().getWidth() / 5;
  }
  
  /**
   * Step event happens every frame.
   */
  @Override
  public void step(double deltaTime) {
    
    
    /**
     * Rather than having an event like newpress and released,
     * the "held" state of a touch is determined by a function
     * call.
     */
    if (getTouch().held()) {                        // ANY finger is held
      angle++;                                    // Make it spin!
    } 
    
    if (getTouch().held(1)) {                       // 2 fingers are held (index IDs 0 and 1)
      width = height = getRoom().getWidth() / 3;  // Make it bigger!
    } else {                                        // Reset size
      width = height = getRoom().getWidth() / 5;
    }
  }
  
  /**
   * NEWPRESS: Fires once when the screen is touched.
   * 
   * index is the ID of the finger that touched the screen.
   * 0 - is the first finger
   * 1 - is the second... so on
   */
  @Override
  public void newpress(int index) {
    x = getTouch().X[0];         // Use "getTouch()" to get lots of information about the input
    y = getTouch().Y[0];         // These are the coords of the first index (the "oldest" finger on the screen)
    
    if (index == 1) {            // A second finger!
      getView().setBackgroundColor(1, 0, 0, 1);  // Red background. (RGBA)
    }
  }
  
  /**
   * RELEASED: Fires once when a finger stops touching the screen.
   * 
   * Note that when this happens, the index ID numbers for all the
   * fingers about this one move down to fill in the gap left.
   * 
   * ex.
   * if there are 3 fingers, their IDs are 0, 1, and 2
   * when finger 1 is removed, 2 becomes one. So now the IDs are 0, and 1
   * but 1 is the finger that was previously 2.
   * 
   * Test this out:
   * The code in newpress() will turn the background red when a second finger is touched down.
   * 
   * While still holding down the first finger, release the second one. This code
   * shoule turn the background white.
   * 
   * Now, turn background red again. This time, release the FIRST finger while still holding
   * down the second. The bg is still red.
   * 
   * Release the other finger, the bg stays red.
   * 
   * When you released the first finger, "index" was 0. Then, the second finger tooks the
   * first finger's place as 0. So when it was released "index" was still 0.
   */
  @Override
  public void released(int index) {
    if (index == 1) {                             // Second finger was released
      getView().setBackgroundColor(1, 1, 1, 1); // White
    }
  }
}

Java Source Code List

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