axmol/cocos2dx/touch_dispatcher/CCTouchDispatcher.cpp

/****************************************************************************
Copyright (c) 2010-2011 cocos2d-x.org
Copyright (c) 2009      Valentin Milea

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
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The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/

#include "CCTouchDispatcher.h"
#include "CCTouchHandler.h"
#include "CCMutableArray.h"
#include "CCSet.h"
#include "CCTouch.h"
#include "CCTexture2D.h"
#include "support/data_support/ccCArray.h"

#include <assert.h>
namespace   cocos2d {

bool CCTouchDispatcher::isDispatchEvents(void)
{
	return m_bDispatchEvents;
}

void CCTouchDispatcher::setDispatchEvents(bool bDispatchEvents)
{
	m_bDispatchEvents = bDispatchEvents;
}

static CCTouchDispatcher *pSharedDispatcher = NULL;

CCTouchDispatcher* CCTouchDispatcher::sharedDispatcher(void)
{
	// synchronized ??
	if (pSharedDispatcher == NULL)
	{
		pSharedDispatcher = new CCTouchDispatcher();
		pSharedDispatcher->init();
	}

	return pSharedDispatcher;
}

/*
+(id) allocWithZone:(CCZone *)zone
{
	@synchronized(self) {
		CCAssert(sharedDispatcher == nil, @"Attempted to allocate a second instance of a singleton.");
		return [super allocWithZone:zone];
	}
	return nil; // on subsequent allocation attempts return nil
}
*/

bool CCTouchDispatcher::init(void)
{
	m_bDispatchEvents = true;
 	m_pTargetedHandlers = new CCMutableArray<CCTouchHandler*>(8);
 	m_pStandardHandlers = new CCMutableArray<CCTouchHandler*>(4);

 	m_pHandlersToAdd = new CCMutableArray<CCTouchHandler*>(8);
    m_pHandlersToRemove = ccCArrayNew(8);

	m_bToRemove = false;
	m_bToAdd = false;
	m_bToQuit = false;
	m_bLocked = false;

	m_sHandlerHelperData[ccTouchBegan].m_type = ccTouchBegan;
	m_sHandlerHelperData[ccTouchMoved].m_type = ccTouchMoved;
	m_sHandlerHelperData[ccTouchEnded].m_type = ccTouchEnded;
	m_sHandlerHelperData[ccTouchCancelled].m_type = ccTouchCancelled;

	return true;
}

CCTouchDispatcher::~CCTouchDispatcher(void)
{
	CC_SAFE_RELEASE(m_pTargetedHandlers);
	CC_SAFE_RELEASE(m_pStandardHandlers);
	CC_SAFE_RELEASE(m_pHandlersToAdd);

	ccCArrayFree(m_pHandlersToRemove);
	m_pHandlersToRemove = NULL;	
}

//
// handlers management
//
void CCTouchDispatcher::forceAddHandler(CCTouchHandler *pHandler, CCMutableArray<CCTouchHandler*> *pArray)
{
	unsigned int u = 0;

 	CCMutableArray<CCTouchHandler*>::CCMutableArrayIterator iter;
 	for (iter = pArray->begin(); iter != pArray->end(); ++iter)
 	{
 		CCTouchHandler *h = *iter;
         if (h)
         {
 		    if (h->getPriority() < pHandler->getPriority())
 		    {
 			    ++u;
 		    }
 
 		    if (h->getDelegate() == pHandler->getDelegate())
 		    {
 			    assert(0);
 			    return;
 		    }
         }
 	}

	pArray->insertObjectAtIndex(pHandler, u);
}

void CCTouchDispatcher::addStandardDelegate(CCTouchDelegate *pDelegate, int nPriority)
{
	pDelegate->m_eTouchDelegateType = ccTouchDelegateStandardBit;
	
	CCTouchHandler *pHandler = CCStandardTouchHandler::handlerWithDelegate(pDelegate, nPriority);
	if (! m_bLocked)
	{
		forceAddHandler(pHandler, m_pStandardHandlers);
	}
	else
	{
		m_pHandlersToAdd->addObject(pHandler);
		m_bToAdd = true;
	}
}

void CCTouchDispatcher::addTargetedDelegate(CCTouchDelegate *pDelegate, int nPriority, bool bSwallowsTouches)
{
	pDelegate->m_eTouchDelegateType = ccTouchDelegateTargetedBit;
	
	CCTouchHandler *pHandler = CCTargetedTouchHandler::handlerWithDelegate(pDelegate, nPriority, bSwallowsTouches);
	if (! m_bLocked)
	{
		forceAddHandler(pHandler, m_pTargetedHandlers);
	}
	else
	{
		m_pHandlersToAdd->addObject(pHandler);
		m_bToAdd = true;
	}
}

void CCTouchDispatcher::forceRemoveDelegate(CCTouchDelegate *pDelegate)
{
	CCTouchHandler *pHandler;
	CCMutableArray<CCTouchHandler*>::CCMutableArrayIterator  iter;

	// XXX: remove it from both handlers ???
	
	// remove handler from m_pStandardHandlers
	for (iter = m_pStandardHandlers->begin(); iter != m_pStandardHandlers->end(); ++iter)
	{
		pHandler = *iter;
		if (pHandler && pHandler->getDelegate() == pDelegate)
		{
			m_pStandardHandlers->removeObject(pHandler);
			break;
		}
	}


    // remove handler from m_pTargetedHandlers
	for (iter = m_pTargetedHandlers->begin(); iter != m_pTargetedHandlers->end(); ++iter)
	{
		pHandler = *iter;
		if (pHandler && pHandler->getDelegate() == pDelegate)
		{
			m_pTargetedHandlers->removeObject(pHandler);
			break;
		}
	}
}

void CCTouchDispatcher::removeDelegate(CCTouchDelegate *pDelegate)
{
	if (pDelegate == NULL)
	{
		return;
	}

	if (! m_bLocked)
	{
		forceRemoveDelegate(pDelegate);
	}
	else
	{
		ccCArrayAppendValue(m_pHandlersToRemove, pDelegate);
		m_bToRemove = true;
	}
}

void CCTouchDispatcher::forceRemoveAllDelegates(void)
{
 	m_pStandardHandlers->removeAllObjects();
 	m_pTargetedHandlers->removeAllObjects();
}

void CCTouchDispatcher::removeAllDelegates(void)
{
	if (! m_bLocked)
	{
		forceRemoveAllDelegates();
	}
	else
	{
		m_bToQuit = true;
	}
}

void CCTouchDispatcher::setPriority(int nPriority, CCTouchDelegate *pDelegate)
{
	assert(0);
}

//
// dispatch events
//
void CCTouchDispatcher::touches(CCSet *pTouches, CCEvent *pEvent, unsigned int uIndex)
{
	assert(uIndex >= 0 && uIndex < 4);

	CCSet *pMutableTouches;
	m_bLocked = true;

	// optimization to prevent a mutable copy when it is not necessary
 	unsigned int uTargetedHandlersCount = m_pTargetedHandlers->count();
 	unsigned int uStandardHandlersCount = m_pStandardHandlers->count();
	bool bNeedsMutableSet = (uTargetedHandlersCount && uStandardHandlersCount);

	pMutableTouches = (bNeedsMutableSet ? pTouches->mutableCopy() : pTouches);

	struct ccTouchHandlerHelperData sHelper = m_sHandlerHelperData[uIndex];
	//
	// process the target handlers 1st
	//
	if (uTargetedHandlersCount > 0)
	{
        CCTouch *pTouch;
		CCSetIterator setIter;
		for (setIter = pTouches->begin(); setIter != pTouches->end(); ++setIter)
		{
			pTouch = (CCTouch *)(*setIter);
			CCTargetedTouchHandler *pHandler;
			CCMutableArray<CCTouchHandler*>::CCMutableArrayIterator arrayIter;
			for (arrayIter = m_pTargetedHandlers->begin(); arrayIter != m_pTargetedHandlers->end(); ++arrayIter)
			/*for (unsigned int i = 0; i < m_pTargetedHandlers->num; ++i)*/
			{
                pHandler = (CCTargetedTouchHandler *)(*arrayIter);

                if (! pHandler)
                {
				   break;
                }

				bool bClaimed = false;
				if (uIndex == ccTouchBegan)
				{
					bClaimed = pHandler->getDelegate()->ccTouchBegan(pTouch, pEvent);
					if (bClaimed)
					{
						pHandler->getClaimedTouches()->addObject(pTouch);
					}
				} else
				if (pHandler->getClaimedTouches()->containsObject(pTouch))
				{
					// moved ended cancelled
					bClaimed = true;

					switch (sHelper.m_type)
					{
					case ccTouchMoved:
						pHandler->getDelegate()->ccTouchMoved(pTouch, pEvent);
						break;
					case ccTouchEnded:
						pHandler->getDelegate()->ccTouchEnded(pTouch, pEvent);
						pHandler->getClaimedTouches()->removeObject(pTouch);
						break;
					case ccTouchCancelled:
						pHandler->getDelegate()->ccTouchCancelled(pTouch, pEvent);
						pHandler->getClaimedTouches()->removeObject(pTouch);
						break;
					}
				}

				if (bClaimed && pHandler->isSwallowsTouches())
				{
					if (bNeedsMutableSet)
					{
						pMutableTouches->removeObject(pTouch);
					}

					break;
				}
			}
		}
	}

	//
	// process standard handlers 2nd
	//
	if (uStandardHandlersCount > 0 && pMutableTouches->count() > 0)
	{
		CCMutableArray<CCTouchHandler*>::CCMutableArrayIterator iter;
		CCStandardTouchHandler *pHandler;
		for (iter = m_pStandardHandlers->begin(); iter != m_pStandardHandlers->end(); ++iter)
		{
			pHandler = (CCStandardTouchHandler*)(*iter);

            if (! pHandler)
            {
			    break;
            }

			switch (sHelper.m_type)
			{
			case ccTouchBegan:
				pHandler->getDelegate()->ccTouchesBegan(pMutableTouches, pEvent);
				break;
			case ccTouchMoved:
				pHandler->getDelegate()->ccTouchesMoved(pMutableTouches, pEvent);
				break;
			case ccTouchEnded:
				pHandler->getDelegate()->ccTouchesEnded(pMutableTouches, pEvent);
				break;
			case ccTouchCancelled:
				pHandler->getDelegate()->ccTouchesCancelled(pMutableTouches, pEvent);
				break;
			}
		}
	}

	if (bNeedsMutableSet)
	{
		pMutableTouches->release();
	}

	//
	// Optimization. To prevent a [handlers copy] which is expensive
	// the add/removes/quit is done after the iterations
	//
	m_bLocked = false;
	if (m_bToRemove)
	{
		m_bToRemove = false;
		for (unsigned int i = 0; i < m_pHandlersToRemove->num; ++i)
		{
			forceRemoveDelegate((CCTouchDelegate*)m_pHandlersToRemove->arr[i]);
		}
		ccCArrayRemoveAllValues(m_pHandlersToRemove);
	}

	if (m_bToAdd)
	{
		m_bToAdd = false;
 		CCMutableArray<CCTouchHandler*>::CCMutableArrayIterator iter;
         CCTouchHandler *pHandler;
 		for (iter = m_pHandlersToAdd->begin(); iter != m_pHandlersToAdd->end(); ++iter)
 		{
 			pHandler = *iter;
            if (! pHandler)
            {
                break;
            }

			if (pHandler->getDelegate()->getTouchDelegateType() & ccTouchDelegateTargetedBit)
			{				
				forceAddHandler(pHandler, m_pTargetedHandlers);
			}
			else
			{
				forceAddHandler(pHandler, m_pStandardHandlers);
			}
 		}
 
 		m_pHandlersToAdd->removeAllObjects();	
	}

	if (m_bToQuit)
	{
		m_bToQuit = false;
		forceRemoveAllDelegates();
	}
}

void CCTouchDispatcher::touchesBegan(CCSet *touches, CCEvent *pEvent)
{
	if (m_bDispatchEvents)
	{
		this->touches(touches, pEvent, ccTouchBegan);
	}
}

void CCTouchDispatcher::touchesMoved(CCSet *touches, CCEvent *pEvent)
{
    if (m_bDispatchEvents)
	{
		this->touches(touches, pEvent, ccTouchMoved);
	}
}

void CCTouchDispatcher::touchesEnded(CCSet *touches, CCEvent *pEvent)
{
    if (m_bDispatchEvents)
	{
		this->touches(touches, pEvent, ccTouchEnded);
	}
}

void CCTouchDispatcher::touchesCancelled(CCSet *touches, CCEvent *pEvent)
{
    if (m_bDispatchEvents)
	{
		this->touches(touches, pEvent, ccTouchCancelled);
	}
}
}//namespace   cocos2d