Android Open Source - droidengine2d Touch Processor

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License

The source code is released under:

Apache License

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Java Source Code

/*   Copyright 2013-2014 Miguel Vicente Linares
 */*  www  .j av  a 2  s.c o m*/
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package com.miviclin.droidengine2d.input;

import android.view.MotionEvent;

import com.miviclin.collections.PooledLinkedQueue;

/**
 * Motion events can be queued in a TouchProcessor to be processed later.
 * 
 * @author Miguel Vicente Linares
 * 
 */
public class TouchProcessor {

  private final Object motionEventQueueLock = new Object();

  private MotionEventProcessor motionEventProcessor;
  private PooledLinkedQueue<MotionEvent> motionEventQueue;

  /**
   * Creates a new TouchProcessor.
   */
  public TouchProcessor() {
    this.motionEventProcessor = null;
    this.motionEventQueue = new PooledLinkedQueue<MotionEvent>(60);
  }

  /**
   * Queues a copy of the specified MotionEvent for later processing. The event will be recycled when
   * {@link TouchProcessor#processTouchInput()} is called.
   * 
   * @param motionEvent MotionEvent.
   */
  public void queueCopyOfMotionEvent(MotionEvent motionEvent) {
    synchronized (motionEventQueueLock) {
      MotionEvent motionEventToQueue = MotionEvent.obtain(motionEvent);
      motionEventQueue.add(motionEventToQueue);
    }
  }

  /**
   * Processes touch input.<br>
   * This method should be called when the game updates, before the update is processed.<br>
   * {@link MotionEventProcessor#processMotionEvent(MotionEvent)} will be called once per MotionEvent queued in this
   * TouchProcessor. After that call, {@link MotionEvent#recycle()} will be called on the MotionEvent.
   */
  public void processTouchInput() {
    if (motionEventProcessor != null) {
      synchronized (motionEventQueueLock) {
        while (!motionEventQueue.isEmpty()) {
          MotionEvent motionEvent = motionEventQueue.poll();
          motionEventProcessor.processMotionEvent(motionEvent);
          motionEvent.recycle();
        }
      }
    }
  }

  /**
   * Sets the {@link MotionEventProcessor} of this TouchProcessor.
   * 
   * @param motionEventProcessor TouchListener.
   */
  public void setMotionEventProcessor(MotionEventProcessor motionEventProcessor) {
    this.motionEventProcessor = motionEventProcessor;
  }

}

Java Source Code List