AndroidSingleTouchHandler.java

/*******************************************************************************
 * Copyright 2011 See AUTHORS file.
 * 
 * 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.badlogic.gdx.backends.android;

import android.content.Context;
import android.view.MotionEvent;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.backends.android.AndroidInput.TouchEvent;

/**
 * Single touch handler for devices running <= 1.6
 * 
 * @author badlogicgames@gmail.com
 */
public class AndroidSingleTouchHandler implements AndroidTouchHandler {
	public void onTouch(MotionEvent event, AndroidInput input) {
		int x = (int) event.getX();
		int y = (int) event.getY();
		int oldX = input.touchX[0];
		int oldY = input.touchY[0];
		input.touchX[0] = x;
		input.touchY[0] = y;

		long timeStamp = event.getEventTime() * 1000000;
		if (event.getAction() == MotionEvent.ACTION_DOWN) {
			postTouchEvent(input, TouchEvent.TOUCH_DOWN, x, y, 0, timeStamp);
			input.touched[0] = true;
			input.deltaX[0] = 0;
			input.deltaY[0] = 0;
		} else if (event.getAction() == MotionEvent.ACTION_MOVE) {
			postTouchEvent(input, TouchEvent.TOUCH_DRAGGED, x, y, 0, timeStamp);
			input.touched[0] = true;
			input.deltaX[0] = x - oldX;
			input.deltaY[0] = y - oldY;
		} else if (event.getAction() == MotionEvent.ACTION_UP) {
			postTouchEvent(input, TouchEvent.TOUCH_UP, x, y, 0, timeStamp);
			input.touched[0] = false;
			input.deltaX[0] = 0;
			input.deltaY[0] = 0;
		} else if (event.getAction() == MotionEvent.ACTION_CANCEL) {
			postTouchEvent(input, TouchEvent.TOUCH_UP, x, y, 0, timeStamp);
			input.touched[0] = false;
			input.deltaX[0] = 0;
			input.deltaY[0] = 0;
		}
	}

	private void postTouchEvent(AndroidInput input, int type, int x, int y, int pointer, long timeStamp) {
		synchronized (input) {
			TouchEvent event = input.usedTouchEvents.obtain();
			event.timeStamp = timeStamp;
			event.pointer = 0;
			event.x = x;
			event.y = y;
			event.type = type;
			input.touchEvents.add(event);
		}
		Gdx.app.getGraphics().requestRendering();
	}

	public boolean supportsMultitouch(Context activity) {
		return false;
	}
}