Android Open Source - AndroidGameDev Single Touch Handler

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Back to project page AndroidGameDev.

License

The source code is released under:

Apache License

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Java Source Code

package cc.rafazz.framework.implementation;
//  ww w .  j a  v  a  2 s.c o  m
import java.util.ArrayList;
import java.util.List;

import android.view.MotionEvent;
import android.view.View;

import cc.rafazz.framework.Input.TouchEvent;
import cc.rafazz.framework.Pool;
import cc.rafazz.framework.Pool.PoolObjectFactory;

public class SingleTouchHandler implements TouchHandler {
  boolean isTouched;
  int touchX;
  int touchY;
  Pool<TouchEvent> touchEventPool;
  List<TouchEvent> touchEvents = new ArrayList<TouchEvent>();
  List<TouchEvent> touchEventsBuffer = new ArrayList<TouchEvent>();
  float scaleX;
  float scaleY;

  public SingleTouchHandler(View view, float scaleX, float scaleY) {
    PoolObjectFactory<TouchEvent> factory = new PoolObjectFactory<TouchEvent>() {
      @Override
      public TouchEvent createObject() {
        return new TouchEvent();
      }
    };
    touchEventPool = new Pool<TouchEvent>(factory, 100);
    view.setOnTouchListener(this);

    this.scaleX = scaleX;
    this.scaleY = scaleY;
  }

  @Override
  public boolean onTouch(View v, MotionEvent event) {
    synchronized (this) {
      TouchEvent touchEvent = touchEventPool.newObject();
      switch (event.getAction()) {
      case MotionEvent.ACTION_DOWN:
        touchEvent.type = TouchEvent.TOUCH_DOWN;
        isTouched = true;
        break;
      case MotionEvent.ACTION_MOVE:
        touchEvent.type = TouchEvent.TOUCH_DRAGGED;
        isTouched = true;
        break;
      case MotionEvent.ACTION_CANCEL:
      case MotionEvent.ACTION_UP:
        touchEvent.type = TouchEvent.TOUCH_UP;
        isTouched = false;
        break;
      }

      touchEvent.x = touchX = (int) (event.getX() * scaleX);
      touchEvent.y = touchY = (int) (event.getY() * scaleY);
      touchEventsBuffer.add(touchEvent);

      return true;
    }
  }

  @Override
  public boolean isTouchDown(int pointer) {
    synchronized (this) {
      if (pointer == 0)
        return isTouched;
      else
        return false;
    }
  }

  @Override
  public int getTouchX(int pointer) {
    synchronized (this) {
      return touchX;
    }
  }

  @Override
  public int getTouchY(int pointer) {
    synchronized (this) {
      return touchY;
    }
  }

  @Override
  public List<TouchEvent> getTouchEvents() {
    synchronized (this) {
      int len = touchEvents.size();
      for (int i = 0; i < len; i++)
        touchEventPool.free(touchEvents.get(i));
      touchEvents.clear();
      touchEvents.addAll(touchEventsBuffer);
      touchEventsBuffer.clear();
      return touchEvents;
    }
  }
}

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