axmol/cocos2dx/layers_scenes_transitions_nodes/CCLayer.cpp

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

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#include <stdarg.h>
#include "CCLayer.h"
#include "touch_dispatcher/CCTouchDispatcher.h"
#include "CCDirector.h"
#include "support/CGPointExtension.h"
namespace   cocos2d {

// CCLayer
CCLayer::CCLayer()
:m_bIsTouchEnabled(false)
,m_bIsAccelerometerEnabled(false)
{
	m_tAnchorPoint = ccp(0.5f, 0.5f);
	m_bIsRelativeAnchorPoint = false;
}

CCLayer::~CCLayer()
{
}

bool CCLayer::init()
{
	bool bRet = false;
	do 
	{
		CCDirector * pDirector;
		CCX_BREAK_IF( ! (pDirector = CCDirector::getSharedDirector()) );
		this->setContentSize(pDirector->getWinSize());
		// success
		bRet = true;
	} while (0);
	return bRet;
}

CCLayer *CCLayer::node()
{
	CCLayer *pRet = new CCLayer();
	if (pRet && pRet->init())
	{
		pRet->autorelease();
		return pRet;
	}
	CCX_SAFE_DELETE(pRet)
	return NULL;
}

/// Touch and Accelerometer related

void CCLayer::registerWithTouchDispatcher()
{
	CCTouchDispatcher::getSharedDispatcher()->addStandardDelegate(this,0);
}


/// isTouchEnabled getter
bool CCLayer::getIsTouchEnabled()
{
	return m_bIsTouchEnabled;
}
/// isTouchEnabled setter
void CCLayer::setIsTouchEnabled(bool enabled)
{
	if (m_bIsTouchEnabled != enabled)
	{
		m_bIsTouchEnabled = enabled;
		if (m_bIsRunning)
		{
			if (enabled)
			{
				this->registerWithTouchDispatcher();
			}
			else
			{
				// have problems?
				CCTouchDispatcher::getSharedDispatcher()->removeDelegate(static_cast<CCTargetedTouchDelegate*>(this));
				CCTouchDispatcher::getSharedDispatcher()->removeDelegate(static_cast<CCStandardTouchDelegate*>(this));
			}
		}
	}
}

/// isAccelerometerEnabled getter
bool CCLayer::getIsAccelerometerEnabled()
{
	return m_bIsAccelerometerEnabled;
}
/// isAccelerometerEnabled setter
void CCLayer::setIsAccelerometerEnabled(bool enabled)
{
	/** @todo UIAccelerometer
	if( enabled != isAccelerometerEnabled ) {
		isAccelerometerEnabled = enabled;
		if( isRunning_ ) {
			if( enabled )
				[[UIAccelerometer sharedAccelerometer] setDelegate:self];
			else
				[[UIAccelerometer sharedAccelerometer] setDelegate:nil];
		}
	}*/
}


/// Callbacks
void CCLayer::onEnter()
{
	
	// register 'parent' nodes first
	// since events are propagated in reverse order
	if (m_bIsTouchEnabled)
	{
		this->registerWithTouchDispatcher();
	}

	// then iterate over all the children
	__super::onEnter();
/** @todo UIAccelerometer
	if( isAccelerometerEnabled )
		[[UIAccelerometer sharedAccelerometer] setDelegate:self];*/
}

void CCLayer::onExit()
{
	if( m_bIsTouchEnabled )
	{
		CCTouchDispatcher::getSharedDispatcher()->removeDelegate(static_cast<CCTargetedTouchDelegate*>(this));
		CCTouchDispatcher::getSharedDispatcher()->removeDelegate(static_cast<CCStandardTouchDelegate*>(this));
	}
/**
	if( isAccelerometerEnabled )
		[[UIAccelerometer sharedAccelerometer] setDelegate:nil];
*/
	__super::onExit();
}

bool CCLayer::ccTouchBegan(CCTouch *pTouch, UIEvent *pEvent)
{
	NSAssert(false, "Layer#ccTouchBegan override me");
	return true;
}

/// ColorLayer


CCColorLayer::CCColorLayer()
{
}
CCColorLayer::~CCColorLayer()
{
}

// Opacity and RGB color protocol
/// opacity getter
GLubyte CCColorLayer::getOpacity()
{
	return m_cOpacity;
}
/// opacity setter
void CCColorLayer::setOpacity(GLubyte var)
{
	m_cOpacity = var;
	updateColor();
}

/// color getter
ccColor3B CCColorLayer::getColor()
{
	return m_tColor;
}

/// color setter
void CCColorLayer::setColor(ccColor3B var)
{
	m_tColor = var;
	updateColor();
}


/// blendFunc getter
ccBlendFunc CCColorLayer::getBlendFunc()
{
	return m_tBlendFunc;
}
/// blendFunc setter
void CCColorLayer::setBlendFunc(ccBlendFunc var)
{
	m_tBlendFunc = var;
}


CCColorLayer * CCColorLayer::layerWithColorWidthHeight(ccColor4B color, GLfloat width, GLfloat height)
{
	CCColorLayer * pLayer = new CCColorLayer();
	pLayer->initWithColorWidthHeight(color,width,height);
	pLayer->autorelease();
	return pLayer;
}
CCColorLayer * CCColorLayer::layerWithColor(ccColor4B color)
{
	CCColorLayer * pLayer = new CCColorLayer();
	pLayer->initWithColor(color);
	pLayer->autorelease();
	return pLayer;
}

CCColorLayer* CCColorLayer::initWithColorWidthHeight(ccColor4B color, GLfloat width, GLfloat height)
{
	// default blend function
	m_tBlendFunc.src = CC_BLEND_SRC;
	m_tBlendFunc.dst = CC_BLEND_DST;

	m_tColor.r = color.r;
	m_tColor.g = color.g;
	m_tColor.b = color.b;
	m_cOpacity = color.a;

	for (unsigned int i=0; i<sizeof(m_pSquareVertices) / sizeof(m_pSquareVertices[0]); i++ )
		m_pSquareVertices[i] = 0.0f;

	this->updateColor();
	this->setContentSize(CGSizeMake(width,height));
	return this;
}

CCColorLayer * CCColorLayer::initWithColor(ccColor4B color)
{
	CGSize s = CCDirector::getSharedDirector()->getWinSize();
	return this->initWithColorWidthHeight(color, s.width, s.height);
}

/// override contentSize
void CCColorLayer::setContentSize(CGSize size)
{
	m_pSquareVertices[2] = size.width;
	m_pSquareVertices[5] = size.height;
	m_pSquareVertices[6] = size.width;
	m_pSquareVertices[7] = size.height;

	__super::setContentSize(size);
}

void CCColorLayer::changeWidthAndHeight(GLfloat w ,GLfloat h)
{
	this->setContentSize(CGSizeMake(w, h));
}

void CCColorLayer::changeWidth(GLfloat w)
{
	this->setContentSize(CGSizeMake(w, m_tContentSize.height));
}

void CCColorLayer::changeHeight(GLfloat h)
{
	this->setContentSize(CGSizeMake(m_tContentSize.width, h));
}

void CCColorLayer::updateColor()
{
	for( unsigned int i=0; i < sizeof(m_pSquareColors) / sizeof(m_pSquareColors[0]); i++ )
	{
		if( i % 4 == 0 )
			m_pSquareColors[i] = m_tColor.r;
		else if( i % 4 == 1)
			m_pSquareColors[i] = m_tColor.g;
		else if( i % 4 ==2  )
			m_pSquareColors[i] = m_tColor.b;
		else
			m_pSquareColors[i] = m_cOpacity;
	}
}

void CCColorLayer::draw()
{		
	// Default GL states: GL_TEXTURE_2D, GL_VERTEX_ARRAY, GL_COLOR_ARRAY, GL_TEXTURE_COORD_ARRAY
	// Needed states: GL_VERTEX_ARRAY, GL_COLOR_ARRAY
	// Unneeded states: GL_TEXTURE_2D, GL_TEXTURE_COORD_ARRAY
	glDisableClientState(GL_TEXTURE_COORD_ARRAY);
	glDisable(GL_TEXTURE_2D);

	glVertexPointer(2, GL_FLOAT, 0, m_pSquareVertices);
	glColorPointer(4, GL_UNSIGNED_BYTE, 0, m_pSquareColors);

	bool newBlend = false;
	if( m_tBlendFunc.src != CC_BLEND_SRC || m_tBlendFunc.dst != CC_BLEND_DST ) {
		newBlend = true;
		glBlendFunc(m_tBlendFunc.src, m_tBlendFunc.dst);
	}
	else if( m_cOpacity != 255 ) {
		newBlend = true;
		glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
	}

	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);

	if( newBlend )
		glBlendFunc(CC_BLEND_SRC, CC_BLEND_DST);

	// restore default GL state
	glEnableClientState(GL_TEXTURE_COORD_ARRAY);
	glEnable(GL_TEXTURE_2D);
}


/// MultiplexLayer

CCMultiplexLayer::CCMultiplexLayer()
{
}
CCMultiplexLayer::~CCMultiplexLayer()
{
	m_pLayers->release();
}

CCMultiplexLayer * CCMultiplexLayer::layerWithLayers(CCLayer * layer, ...)
{
	va_list args;
	va_start(args,layer);

	CCMultiplexLayer * pMultiplexLayer = new CCMultiplexLayer();
	pMultiplexLayer->initWithLayers(layer, args);
	pMultiplexLayer->autorelease();

	va_end(args);
	return pMultiplexLayer;
}

CCMultiplexLayer * CCMultiplexLayer::initWithLayers(CCLayer *layer, va_list params)
{
	m_pLayers = new NSMutableArray<CCLayer*>(5);
	m_pLayers->retain();

	m_pLayers->addObject(layer);

	CCLayer *l = va_arg(params,CCLayer*);
	while( l ) {
		m_pLayers->addObject(l);
		l = va_arg(params,CCLayer*);
	}

	m_nEnabledLayer = 0;
	this->addChild(m_pLayers->getObjectAtIndex(m_nEnabledLayer));

	return this;
}


void CCMultiplexLayer::switchTo(unsigned int n)
{
	NSAssert( n < m_pLayers->count(), "Invalid index in MultiplexLayer switchTo message" );

	this->removeChild(m_pLayers->getObjectAtIndex(m_nEnabledLayer), true);

	m_nEnabledLayer = n;

	this->addChild(m_pLayers->getObjectAtIndex(n));
}

void CCMultiplexLayer::switchToAndReleaseMe(unsigned int n)
{
	NSAssert( n < m_pLayers->count(), "Invalid index in MultiplexLayer switchTo message" );

	this->removeChild(m_pLayers->getObjectAtIndex(m_nEnabledLayer), true);

	//[layers replaceObjectAtIndex:enabledLayer withObject:[NSNull null]];
	m_pLayers->replaceObjectAtIndex(m_nEnabledLayer, NULL);

	m_nEnabledLayer = n;

	this->addChild(m_pLayers->getObjectAtIndex(n));
}
}//namespace   cocos2d