axmol/cocos2dx/platform/android/CCXUIAccelerometer_android.cpp

/****************************************************************************
Copyright (c) 2010 cocos2d-x.org

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#include "CCXUIAccelerometer_android.h"
#include <stdio.h>
#include <android/log.h>

#define TG3_GRAVITY_EARTH                    (9.80665f)
#define  LOG_TAG    "CCXUIAccelerometer_android"
#define  LOGD(...)  __android_log_print(ANDROID_LOG_DEBUG,LOG_TAG,__VA_ARGS__)

namespace cocos2d
{
	UIAccelerometer* UIAccelerometer::m_spUIAccelerometer = NULL;

	UIAccelerometer::UIAccelerometer() {
		m_pAccelDelegates = new std::list<UIAccelerometerDelegate*>();
	}

    UIAccelerometer::~UIAccelerometer() {
    	if ( m_pAccelDelegates ) {
    		delete m_pAccelDelegates;
    		m_pAccelDelegates = NULL;
    	}
    }

    UIAccelerometer* UIAccelerometer::sharedAccelerometer() {

    	if (m_spUIAccelerometer == NULL)
    	{
    		m_spUIAccelerometer = new UIAccelerometer();
    	}
    	
    	return m_spUIAccelerometer;
    }

    void UIAccelerometer::removeDelegate(UIAccelerometerDelegate* pDelegate) {
    	m_pAccelDelegates->remove(pDelegate);

    	if ( 0 == m_pAccelDelegates->size() ) {
    		disableAccelerometerJNI();
    	}
    }

    void UIAccelerometer::addDelegate(UIAccelerometerDelegate* pDelegate) {
    	if ( 0 == m_pAccelDelegates->size() ) {
    		enableAccelerometerJNI();
    	}

    	m_pAccelDelegates->push_front(pDelegate);
    }

    void UIAccelerometer::update(float x, float y, float z, long sensorTimeStamp) {
    	if ( m_pAccelDelegates != NULL && !m_pAccelDelegates->empty() ) {
    		m_obAccelerationValue.x = -((double)x / TG3_GRAVITY_EARTH);
    		m_obAccelerationValue.y = -((double)y / TG3_GRAVITY_EARTH);
    		m_obAccelerationValue.z = -((double)z / TG3_GRAVITY_EARTH);
    		m_obAccelerationValue.timestamp = (double)sensorTimeStamp;

    		for(std::list<UIAccelerometerDelegate*>::const_iterator it = m_pAccelDelegates->begin(); it != m_pAccelDelegates->end(); ++it)
    		{
				(*it)->didAccelerate(&m_obAccelerationValue);
    		}
    	}
    }
} // end of namespace cococs2d