RedCore/cocos2d/cocos/ui/UILayout.cpp

/****************************************************************************
Copyright (c) 2013-2017 Chukong Technologies Inc.

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
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THE SOFTWARE.
****************************************************************************/

#include "ui/UILayout.h"
#include "ui/UIHelper.h"
#include "ui/UIScale9Sprite.h"
#include "renderer/CCGLProgram.h"
#include "renderer/CCGLProgramCache.h"
#include "renderer/ccGLStateCache.h"
#include "renderer/CCRenderState.h"
#include "base/CCDirector.h"
#include "2d/CCDrawingPrimitives.h"
#include "renderer/CCRenderer.h"
#include "ui/UILayoutManager.h"
#include "2d/CCDrawNode.h"
#include "2d/CCLayer.h"
#include "2d/CCSprite.h"
#include "base/CCEventFocus.h"
#include "base/CCStencilStateManager.h"
#include "editor-support/cocostudio/CocosStudioExtension.h"


NS_CC_BEGIN

namespace ui {
    
static const int BACKGROUNDIMAGE_Z = (-1);
static const int BCAKGROUNDCOLORRENDERER_Z = (-2);
    
IMPLEMENT_CLASS_GUI_INFO(Layout)

Layout::Layout():
_backGroundScale9Enabled(false),
_backGroundImage(nullptr),
_backGroundImageFileName(""),
_backGroundImageCapInsets(Rect::ZERO),
_colorType(BackGroundColorType::NONE),
_bgImageTexType(TextureResType::LOCAL),
_backGroundImageTextureSize(Size::ZERO),
_backGroundImageColor(Color3B::WHITE),
_backGroundImageOpacity(255),
_colorRender(nullptr),
_gradientRender(nullptr),
_cColor(Color3B::WHITE),
_gStartColor(Color3B::WHITE),
_gEndColor(Color3B::WHITE),
_alongVector(Vec2(0.0f, -1.0f)),
_cOpacity(255),
_clippingEnabled(false),
_layoutType(Type::ABSOLUTE),
_clippingType(ClippingType::STENCIL),
_clippingStencil(nullptr),
_clippingRect(Rect::ZERO),
_clippingParent(nullptr),
_clippingRectDirty(true),
_stencilStateManager(new StencilStateManager()),
_doLayoutDirty(true),
_isInterceptTouch(false),
_loopFocus(false),
_passFocusToChild(true),
_isFocusPassing(false)
{
    //no-op
}

Layout::~Layout()
{
    CC_SAFE_RELEASE(_clippingStencil);
    CC_SAFE_DELETE(_stencilStateManager);
}
    
void Layout::onEnter()
{
#if CC_ENABLE_SCRIPT_BINDING
    if (_scriptType == kScriptTypeJavascript)
    {
        if (ScriptEngineManager::sendNodeEventToJSExtended(this, kNodeOnEnter))
            return;
    }
#endif
    
    Widget::onEnter();
    if (_clippingStencil)
    {
        _clippingStencil->onEnter();
    }
    _doLayoutDirty = true;
    _clippingRectDirty = true;
}
    
void Layout::onExit()
{
#if CC_ENABLE_SCRIPT_BINDING
    if (_scriptType == kScriptTypeJavascript)
    {
        if (ScriptEngineManager::sendNodeEventToJSExtended(this, kNodeOnExit))
            return;
    }
#endif
    
    Widget::onExit();
    if (_clippingStencil)
    {
        _clippingStencil->onExit();
    }
}
    
void Layout::setGlobalZOrder(float globalZOrder)
{
    // _protectedChildren's global z order is set in ProtectedNode::setGlobalZOrder()

    Widget::setGlobalZOrder(globalZOrder);
    if (_clippingStencil)
        _clippingStencil->setGlobalZOrder(globalZOrder);
    
    for (auto &child : _children)
        child->setGlobalZOrder(globalZOrder);
}

Layout* Layout::create()
{
    Layout* layout = new (std::nothrow) Layout();
    if (layout && layout->init())
    {
        layout->autorelease();
        return layout;
    }
    CC_SAFE_DELETE(layout);
    return nullptr;
}

bool Layout::init()
{
    if (Widget::init())
    {
        ignoreContentAdaptWithSize(false);
        setContentSize(Size::ZERO);
        setAnchorPoint(Vec2::ZERO);
        onPassFocusToChild = CC_CALLBACK_2(Layout::findNearestChildWidgetIndex, this);
        return true;
    }
    return false;
}
    
void Layout::addChild(Node* child)
{
    Layout::addChild(child, child->getLocalZOrder(), child->getTag());
}
    
void Layout::addChild(Node * child, int localZOrder)
{
    Layout::addChild(child, localZOrder, child->getTag());
}

void Layout::addChild(Node *child, int zOrder, int tag)
{
    if (dynamic_cast<Widget*>(child)) {
        supplyTheLayoutParameterLackToChild(static_cast<Widget*>(child));
    }
    child->setGlobalZOrder(_globalZOrder);
    Widget::addChild(child, zOrder, tag);
    _doLayoutDirty = true;
}
    
void Layout::addChild(Node* child, int zOrder, const std::string &name)
{
    if (dynamic_cast<Widget*>(child)) {
        supplyTheLayoutParameterLackToChild(static_cast<Widget*>(child));
    }
    child->setGlobalZOrder(_globalZOrder);
    Widget::addChild(child, zOrder, name);
    _doLayoutDirty = true;
}
    
void Layout::removeChild(Node *child, bool cleanup)
{
    Widget::removeChild(child, cleanup);
    _doLayoutDirty = true;
}
    
void Layout::removeAllChildren()
{
    Widget::removeAllChildren();
    _doLayoutDirty = true;
}
    
void Layout::removeAllChildrenWithCleanup(bool cleanup)
{
    Widget::removeAllChildrenWithCleanup(cleanup);
    _doLayoutDirty = true;
}

bool Layout::isClippingEnabled()const
{
    return _clippingEnabled;
}

void Layout::visit(Renderer *renderer, const Mat4 &parentTransform, uint32_t parentFlags)
{
    if (!_visible)
    {
        return;
    }
    
    adaptRenderers();
    doLayout();
    
    if (_clippingEnabled)
    {
        switch (_clippingType)
        {
            case ClippingType::STENCIL:
                stencilClippingVisit(renderer, parentTransform, parentFlags);
                break;
            case ClippingType::SCISSOR:
                scissorClippingVisit(renderer, parentTransform, parentFlags);
                break;
            default:
                break;
        }
    }
    else
    {
        Widget::visit(renderer, parentTransform, parentFlags);
    }
}
    
void Layout::stencilClippingVisit(Renderer *renderer, const Mat4& parentTransform, uint32_t parentFlags)
{
    if(!_visible)
        return;
    
    uint32_t flags = processParentFlags(parentTransform, parentFlags);

    // IMPORTANT:
    // To ease the migration to v3.0, we still support the Mat4 stack,
    // but it is deprecated and your code should not rely on it
    Director* director = Director::getInstance();
    CCASSERT(nullptr != director, "Director is null when setting matrix stack");
    director->pushMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_MODELVIEW);
    director->loadMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_MODELVIEW, _modelViewTransform);
    //Add group command

    _groupCommand.init(_globalZOrder);
    renderer->addCommand(&_groupCommand);
    
    renderer->pushGroup(_groupCommand.getRenderQueueID());
    
    _beforeVisitCmdStencil.init(_globalZOrder);
    _beforeVisitCmdStencil.func = CC_CALLBACK_0(StencilStateManager::onBeforeVisit, _stencilStateManager);
    renderer->addCommand(&_beforeVisitCmdStencil);
    
    _clippingStencil->visit(renderer, _modelViewTransform, flags);
    
    _afterDrawStencilCmd.init(_globalZOrder);
    _afterDrawStencilCmd.func = CC_CALLBACK_0(StencilStateManager::onAfterDrawStencil, _stencilStateManager);
    renderer->addCommand(&_afterDrawStencilCmd);
    
    int i = 0;      // used by _children
    int j = 0;      // used by _protectedChildren
    
    sortAllChildren();
    sortAllProtectedChildren();
    
    //
    // draw children and protectedChildren zOrder < 0
    //
    for(auto size = _children.size(); i < size; i++)
    {
        auto node = _children.at(i);
        
        if (node && node->getLocalZOrder() < 0)
            node->visit(renderer, _modelViewTransform, flags);
        else
            break;
    }
    
    for(auto size = _protectedChildren.size(); j < size; j++)
    {
        auto node = _protectedChildren.at(j);
        
        if (node && node->getLocalZOrder() < 0)
            node->visit(renderer, _modelViewTransform, flags);
        else
            break;
    }
    
    //
    // draw self
    //
    this->draw(renderer, _modelViewTransform, flags);
    
    //
    // draw children and protectedChildren zOrder >= 0
    //
    for(auto it=_protectedChildren.cbegin()+j, itCend = _protectedChildren.cend(); it != itCend; ++it)
        (*it)->visit(renderer, _modelViewTransform, flags);
    
    for(auto it=_children.cbegin()+i, itCend = _children.cend(); it != itCend; ++it)
        (*it)->visit(renderer, _modelViewTransform, flags);

    
    _afterVisitCmdStencil.init(_globalZOrder);
    _afterVisitCmdStencil.func = CC_CALLBACK_0(StencilStateManager::onAfterVisit, _stencilStateManager);
    renderer->addCommand(&_afterVisitCmdStencil);
    
    renderer->popGroup();
    
    director->popMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_MODELVIEW);
}
    
void Layout::onBeforeVisitScissor()
{
    auto glview = Director::getInstance()->getOpenGLView();
    // apply scissor test
    _scissorOldState = glview->isScissorEnabled();
    if (false == _scissorOldState)
    {
        glEnable(GL_SCISSOR_TEST);
    }

    // apply scissor box
    Rect clippingRect = getClippingRect();
    _clippingOldRect = glview->getScissorRect();
    if (false == _clippingOldRect.equals(clippingRect))
    {
        glview->setScissorInPoints(clippingRect.origin.x,
                                   clippingRect.origin.y,
                                   clippingRect.size.width,
                                   clippingRect.size.height);
    }
}

void Layout::onAfterVisitScissor()
{
    if (_scissorOldState)
    {
        // revert scissor box
        if (false == _clippingOldRect.equals(_clippingRect))
        {
            auto glview = Director::getInstance()->getOpenGLView();
            glview->setScissorInPoints(_clippingOldRect.origin.x,
                                       _clippingOldRect.origin.y,
                                       _clippingOldRect.size.width,
                                       _clippingOldRect.size.height);
        }
    }
    else
    {
        // revert scissor test
        glDisable(GL_SCISSOR_TEST);
    }
}
    
void Layout::scissorClippingVisit(Renderer *renderer, const Mat4& parentTransform, uint32_t parentFlags)
{
    if (parentFlags & FLAGS_DIRTY_MASK)
    {
        _clippingRectDirty = true;
    }
    _beforeVisitCmdScissor.init(_globalZOrder);
    _beforeVisitCmdScissor.func = CC_CALLBACK_0(Layout::onBeforeVisitScissor, this);
    renderer->addCommand(&_beforeVisitCmdScissor);

    ProtectedNode::visit(renderer, parentTransform, parentFlags);
    
    _afterVisitCmdScissor.init(_globalZOrder);
    _afterVisitCmdScissor.func = CC_CALLBACK_0(Layout::onAfterVisitScissor, this);
    renderer->addCommand(&_afterVisitCmdScissor);
}

void Layout::setClippingEnabled(bool able)
{
    if (able == _clippingEnabled)
    {
        return;
    }
    _clippingEnabled = able;
    switch (_clippingType)
    {
        case ClippingType::STENCIL:
            if (able)
            {
                _clippingStencil = DrawNode::create();
                _clippingStencil->setGlobalZOrder(_globalZOrder);
                if (_running)
                {
                    _clippingStencil->onEnter();
                }
                _clippingStencil->retain();
                setStencilClippingSize(_contentSize);
            }
            else
            {
                if (_running)
                {
                    _clippingStencil->onExit();
                }
                _clippingStencil->release();
                _clippingStencil = nullptr;
            }
            break;
        default:
            break;
    }
}
    
void Layout::setClippingType(ClippingType type)
{
    if (type == _clippingType)
    {
        return;
    }
    bool clippingEnabled = isClippingEnabled();
    setClippingEnabled(false);
    _clippingType = type;
    setClippingEnabled(clippingEnabled);
}
    
Layout::ClippingType Layout::getClippingType()const
{
    return _clippingType;
}
    
void Layout::setStencilClippingSize(const Size& /*size*/)
{
    if (_clippingEnabled && _clippingType == ClippingType::STENCIL)
    {
        Vec2 rect[4];
        // rect[0].setZero(); Zero default
        rect[1].set(_contentSize.width, 0.0f);
        rect[2].set(_contentSize.width, _contentSize.height);
        rect[3].set(0.0f, _contentSize.height);
        Color4F green(0.0f, 1.0f, 0.0f, 1.0f);
        _clippingStencil->clear();
        _clippingStencil->drawPolygon(rect, 4, green, 0, green);
    }
}
    
const Rect& Layout::getClippingRect() 
{
    if (_clippingRectDirty)
    {
        Vec2 worldPos = convertToWorldSpace(Vec2::ZERO);
        AffineTransform t = getNodeToWorldAffineTransform();
        float scissorWidth = _contentSize.width*t.a;
        float scissorHeight = _contentSize.height*t.d;
        Rect parentClippingRect;
        Layout* parent = this;

        while (parent)
        {
            parent = dynamic_cast<Layout*>(parent->getParent());
            if(parent)
            {
                if (parent->isClippingEnabled())
                {
                    _clippingParent = parent;
                    break;
                }
            }
        }
        
        if (_clippingParent)
        {
            parentClippingRect = _clippingParent->getClippingRect();
            float finalX = worldPos.x - (scissorWidth * _anchorPoint.x);
            float finalY = worldPos.y - (scissorHeight * _anchorPoint.y);
            float finalWidth = scissorWidth;
            float finalHeight = scissorHeight;
            
            float leftOffset = worldPos.x - parentClippingRect.origin.x;
            if (leftOffset < 0.0f)
            {
                finalX = parentClippingRect.origin.x;
                finalWidth += leftOffset;
            }
            float rightOffset = (worldPos.x + scissorWidth) - (parentClippingRect.origin.x + parentClippingRect.size.width);
            if (rightOffset > 0.0f)
            {
                finalWidth -= rightOffset;
            }
            float topOffset = (worldPos.y + scissorHeight) - (parentClippingRect.origin.y + parentClippingRect.size.height);
            if (topOffset > 0.0f)
            {
                finalHeight -= topOffset;
            }
            float bottomOffset = worldPos.y - parentClippingRect.origin.y;
            if (bottomOffset < 0.0f)
            {
                finalY = parentClippingRect.origin.y;
                finalHeight += bottomOffset;
            }
            if (finalWidth < 0.0f)
            {
                finalWidth = 0.0f;
            }
            if (finalHeight < 0.0f)
            {
                finalHeight = 0.0f;
            }
            _clippingRect.origin.x = finalX;
            _clippingRect.origin.y = finalY;
            _clippingRect.size.width = finalWidth;
            _clippingRect.size.height = finalHeight;
        }
        else
        {
            _clippingRect.origin.x = worldPos.x - (scissorWidth * _anchorPoint.x);
            _clippingRect.origin.y = worldPos.y - (scissorHeight * _anchorPoint.y);
            _clippingRect.size.width = scissorWidth;
            _clippingRect.size.height = scissorHeight;
        }
        _clippingRectDirty = false;
    }
    return _clippingRect;
}

void Layout::onSizeChanged()
{
    Widget::onSizeChanged();
    setStencilClippingSize(_contentSize);
    _doLayoutDirty = true;
    _clippingRectDirty = true;
    if (_backGroundImage)
    {
        _backGroundImage->setPosition(_contentSize.width/2.0f, _contentSize.height/2.0f);
        if (_backGroundScale9Enabled){
            _backGroundImage->setPreferredSize(_contentSize);
        }
        else{
            _backGroundImage->setPreferredSize(_backGroundImageTextureSize);
        }
    }
    if (_colorRender)
    {
        _colorRender->setContentSize(_contentSize);
    }
    if (_gradientRender)
    {
        _gradientRender->setContentSize(_contentSize);
    }
}

void Layout::setBackGroundImageScale9Enabled(bool able)
{
    if (_backGroundScale9Enabled == able)
    {
        return;
    }
    _backGroundScale9Enabled = able;
    if (nullptr == _backGroundImage)
    {
        addBackGroundImage();
        setBackGroundImage(_backGroundImageFileName,_bgImageTexType);
    }
    if(_backGroundScale9Enabled){
        _backGroundImage->setRenderingType(Scale9Sprite::RenderingType::SLICE);
        _backGroundImage->setPreferredSize(_contentSize);
    }else{
        _backGroundImage->setRenderingType(Scale9Sprite::RenderingType::SIMPLE);
        _backGroundImage->setPreferredSize(_backGroundImageTextureSize);
    }
    
    setBackGroundImageCapInsets(_backGroundImageCapInsets);
}
    
bool Layout::isBackGroundImageScale9Enabled()const
{
    return _backGroundScale9Enabled;
}

void Layout::setBackGroundImage(const std::string& fileName,TextureResType texType)
{
    if (fileName.empty())
    {
        return;
    }
    if (_backGroundImage == nullptr)
    {
        addBackGroundImage();
        if(_backGroundScale9Enabled){
            _backGroundImage->setRenderingType(Scale9Sprite::RenderingType::SLICE);
        }else{
            _backGroundImage->setRenderingType(Scale9Sprite::RenderingType::SIMPLE);
        }
    }
    _backGroundImageFileName = fileName;
    _bgImageTexType = texType;
   
    switch (_bgImageTexType)
    {
        case TextureResType::LOCAL:
            _backGroundImage->initWithFile(fileName);
            break;
        case TextureResType::PLIST:
            _backGroundImage->initWithSpriteFrameName(fileName);
            break;
        default:
            break;
    }
    
    _backGroundImageTextureSize = _backGroundImage->getContentSize();
    _backGroundImage->setPosition(_contentSize.width/2.0f, _contentSize.height/2.0f);
    if (_backGroundScale9Enabled) {
        _backGroundImage->setPreferredSize(_contentSize);
    }
    else{
        _backGroundImage->setPreferredSize(_backGroundImageTextureSize);
    }
    updateBackGroundImageRGBA();
}

void Layout::setBackGroundImageCapInsets(const Rect &capInsets)
{
    _backGroundImageCapInsets = capInsets;
    if (_backGroundScale9Enabled && _backGroundImage)
    {
        _backGroundImage->setCapInsets(capInsets);
    }
}
    
const Rect& Layout::getBackGroundImageCapInsets()const
{
    return _backGroundImageCapInsets;
}

void Layout::supplyTheLayoutParameterLackToChild(Widget *child)
{
    if (!child)
    {
        return;
    }
    switch (_layoutType)
    {
        case Type::ABSOLUTE:
            break;
        case Type::HORIZONTAL:
        case Type::VERTICAL:
        {
            LinearLayoutParameter* layoutParameter = dynamic_cast<LinearLayoutParameter*>(child->getLayoutParameter());
            if (!layoutParameter)
            {
                child->setLayoutParameter(LinearLayoutParameter::create());
            }
            break;
        }
        case Type::RELATIVE:
        {
            RelativeLayoutParameter* layoutParameter = dynamic_cast<RelativeLayoutParameter*>(child->getLayoutParameter());
            if (!layoutParameter)
            {
                child->setLayoutParameter(RelativeLayoutParameter::create());
            }
            break;
        }
        default:
            break;
    }
}

void Layout::addBackGroundImage()
{
    _backGroundImage = Scale9Sprite::create();
    _backGroundImage->setRenderingType(Scale9Sprite::RenderingType::SIMPLE);
    
    addProtectedChild(_backGroundImage, BACKGROUNDIMAGE_Z, -1);
   
    _backGroundImage->setPosition(_contentSize.width/2.0f, _contentSize.height/2.0f);
}

void Layout::removeBackGroundImage()
{
    if (!_backGroundImage)
    {
        return;
    }
    removeProtectedChild(_backGroundImage);
    _backGroundImage = nullptr;
    _backGroundImageFileName = "";
    _backGroundImageTextureSize = Size::ZERO;
}

void Layout::setBackGroundColorType(BackGroundColorType type)
{
    if (_colorType == type)
    {
        return;
    }
    switch (_colorType)
    {
        case BackGroundColorType::NONE:
            if (_colorRender)
            {
                removeProtectedChild(_colorRender);
                _colorRender = nullptr;
            }
            if (_gradientRender)
            {
                removeProtectedChild(_gradientRender);
                _gradientRender = nullptr;
            }
            break;
        case BackGroundColorType::SOLID:
            if (_colorRender)
            {
                removeProtectedChild(_colorRender);
                _colorRender = nullptr;
            }
            break;
        case BackGroundColorType::GRADIENT:
            if (_gradientRender)
            {
                removeProtectedChild(_gradientRender);
                _gradientRender = nullptr;
            }
            break;
        default:
            break;
    }
    _colorType = type;
    switch (_colorType)
    {
        case BackGroundColorType::NONE:
            break;
        case BackGroundColorType::SOLID:
            _colorRender = LayerColor::create();
            _colorRender->setContentSize(_contentSize);
            _colorRender->setOpacity(_cOpacity);
            _colorRender->setColor(_cColor);
            addProtectedChild(_colorRender, BCAKGROUNDCOLORRENDERER_Z, -1);
            break;
        case BackGroundColorType::GRADIENT:
            _gradientRender = LayerGradient::create();
            _gradientRender->setContentSize(_contentSize);
            _gradientRender->setOpacity(_cOpacity);
            _gradientRender->setStartColor(_gStartColor);
            _gradientRender->setEndColor(_gEndColor);
            _gradientRender->setVector(_alongVector);
            addProtectedChild(_gradientRender, BCAKGROUNDCOLORRENDERER_Z, -1);
            break;
        default:
            break;
    }
}
    
Layout::BackGroundColorType Layout::getBackGroundColorType()const
{
    return _colorType;
}

void Layout::setBackGroundColor(const Color3B &color)
{
    _cColor = color;
    if (_colorRender)
    {
        _colorRender->setColor(color);
    }
}
    
const Color3B& Layout::getBackGroundColor()const
{
    return _cColor;
}

void Layout::setBackGroundColor(const Color3B &startColor, const Color3B &endColor)
{
    _gStartColor = startColor;
    if (_gradientRender)
    {
        _gradientRender->setStartColor(startColor);
    }
    _gEndColor = endColor;
    if (_gradientRender)
    {
        _gradientRender->setEndColor(endColor);
    }
}
    
const Color3B& Layout::getBackGroundStartColor()const
{
    return _gStartColor;
}

const Color3B& Layout::getBackGroundEndColor()const
{
    return _gEndColor;
}

void Layout::setBackGroundColorOpacity(GLubyte opacity)
{
    _cOpacity = opacity;
    switch (_colorType)
    {
        case BackGroundColorType::NONE:
            break;
        case BackGroundColorType::SOLID:
            _colorRender->setOpacity(opacity);
            break;
        case BackGroundColorType::GRADIENT:
            _gradientRender->setOpacity(opacity);
            break;
        default:
            break;
    }
}
    
GLubyte Layout::getBackGroundColorOpacity()const
{
    return _cOpacity;
}

void Layout::setBackGroundColorVector(const Vec2 &vector)
{
    _alongVector = vector;
    if (_gradientRender)
    {
        _gradientRender->setVector(vector);
    }
}
    
const Vec2& Layout::getBackGroundColorVector()const
{
    return _alongVector;
}

void Layout::setBackGroundImageColor(const Color3B &color)
{
    _backGroundImageColor = color;
    updateBackGroundImageColor();
}

void Layout::setBackGroundImageOpacity(GLubyte opacity)
{
    _backGroundImageOpacity = opacity;
    updateBackGroundImageOpacity();
}

const Color3B& Layout::getBackGroundImageColor()const
{
    return _backGroundImageColor;
}

GLubyte Layout::getBackGroundImageOpacity()const
{
    return _backGroundImageOpacity;
}

void Layout::updateBackGroundImageColor()
{
    if (_backGroundImage)
    {
        _backGroundImage->setColor(_backGroundImageColor);
    }
}

void Layout::updateBackGroundImageOpacity()
{
    if (_backGroundImage)
    {
        _backGroundImage->setOpacity(_backGroundImageOpacity);
    }
}

void Layout::updateBackGroundImageRGBA()
{
    if (_backGroundImage)
    {
        _backGroundImage->setColor(_backGroundImageColor);
        _backGroundImage->setOpacity(_backGroundImageOpacity);
    }
}

const Size& Layout::getBackGroundImageTextureSize() const
{
    return _backGroundImageTextureSize;
}

void Layout::setLayoutType(Type type)
{
    _layoutType = type;
   
    for (auto& child : _children)
    {
        Widget* widgetChild = dynamic_cast<Widget*>(child);
        if (widgetChild)
        {
            supplyTheLayoutParameterLackToChild(static_cast<Widget*>(child));
        }
    }
    _doLayoutDirty = true;
}
    


Layout::Type Layout::getLayoutType() const
{
    return _layoutType;
}

void Layout::forceDoLayout()
{
    this->requestDoLayout();
    this->doLayout();
}
    
void Layout::requestDoLayout()
{
    _doLayoutDirty = true;
}
    
Size Layout::getLayoutContentSize()const
{
    return this->getContentSize();
}
    
const Vector<Node*>& Layout::getLayoutElements()const
{
    return this->getChildren();
}
    
LayoutManager* Layout::createLayoutManager()
{
    LayoutManager* exe = nullptr;
    switch (_layoutType)
    {
        case Type::VERTICAL:
            exe = LinearVerticalLayoutManager::create();
            break;
        case Type::HORIZONTAL:
            exe = LinearHorizontalLayoutManager::create();
            break;
        case Type::RELATIVE:
            exe = RelativeLayoutManager::create();
            break;
        default:
            break;
    }
    return exe;

}

void Layout::doLayout()
{
    
    if (!_doLayoutDirty)
    {
        return;
    }
    
    sortAllChildren();

    LayoutManager* executant = this->createLayoutManager();
    
    if (executant)
    {
        executant->doLayout(this);
    }
    
    _doLayoutDirty = false;
}

std::string Layout::getDescription() const
{
    return "Layout";
}

Widget* Layout::createCloneInstance()
{
    return Layout::create();
}

void Layout::copyClonedWidgetChildren(Widget* model)
{
    Widget::copyClonedWidgetChildren(model);
}

void Layout::copySpecialProperties(Widget *widget)
{
    Layout* layout = dynamic_cast<Layout*>(widget);
    if (layout)
    {
        setBackGroundImageScale9Enabled(layout->_backGroundScale9Enabled);
        setBackGroundImage(layout->_backGroundImageFileName,layout->_bgImageTexType);
        setBackGroundImageCapInsets(layout->_backGroundImageCapInsets);
        setBackGroundColorType(layout->_colorType);
        setBackGroundColor(layout->_cColor);
        setBackGroundColor(layout->_gStartColor, layout->_gEndColor);
        setBackGroundColorOpacity(layout->_cOpacity);
        setBackGroundColorVector(layout->_alongVector);
        setLayoutType(layout->_layoutType);
        setClippingEnabled(layout->_clippingEnabled);
        setClippingType(layout->_clippingType);
        _loopFocus = layout->_loopFocus;
        _passFocusToChild = layout->_passFocusToChild;
        _isInterceptTouch = layout->_isInterceptTouch;
    }
}
    
void Layout::setLoopFocus(bool loop)
{
    _loopFocus = loop;
}

bool Layout::isLoopFocus()const
{
    return _loopFocus;
}


void Layout::setPassFocusToChild(bool pass)
{
    _passFocusToChild = pass;
}

bool Layout::isPassFocusToChild()const
{
    return _passFocusToChild;
}

Size Layout::getLayoutAccumulatedSize()const
{
    const auto& children = this->getChildren();
    Size layoutSize = Size::ZERO;
    int widgetCount =0;
    for(const auto& widget : children)
    {
        Layout *layout = dynamic_cast<Layout*>(widget);
        if (nullptr != layout)
        {
            layoutSize = layoutSize + layout->getLayoutAccumulatedSize();
        }
        else
        {
            Widget *w = dynamic_cast<Widget*>(widget);
            if (w)
            {
                widgetCount++;
                Margin m = w->getLayoutParameter()->getMargin();
                layoutSize = layoutSize + w->getContentSize() + Size(m.right + m.left,  m.top + m.bottom) * 0.5;
            }
        }
    }
    
    //subtract extra size
    Type type = this->getLayoutType();
    if (type == Type::HORIZONTAL)
    {
        layoutSize = layoutSize - Size(0, layoutSize.height/widgetCount * (widgetCount-1));
    }
    if (type == Type::VERTICAL)
    {
        layoutSize = layoutSize - Size(layoutSize.width/widgetCount * (widgetCount-1), 0);
    }
    return layoutSize;
}

Vec2 Layout::getWorldCenterPoint(Widget* widget)const
{
    Layout *layout = dynamic_cast<Layout*>(widget);
    //FIXEDME: we don't need to calculate the content size of layout anymore
    Size widgetSize = layout ? layout->getLayoutAccumulatedSize() :  widget->getContentSize();
//    CCLOG("content size : width = %f, height = %f", widgetSize.width, widgetSize.height);
    return widget->convertToWorldSpace(Vec2(widgetSize.width/2, widgetSize.height/2));
}

float Layout::calculateNearestDistance(Widget* baseWidget)
{
    float distance = FLT_MAX;
    
    Vec2 widgetPosition =  this->getWorldCenterPoint(baseWidget);
    
    for (Node* node : _children)
    {
        Layout *layout = dynamic_cast<Layout*>(node);
        int length;
        if (layout)
        {
            length = layout->calculateNearestDistance(baseWidget);
        }
        else
        {
            Widget* w = dynamic_cast<Widget*>(node);
            if (w && w->isFocusEnabled())
            {
                Vec2 wPosition = this->getWorldCenterPoint(w);
                length = (wPosition - widgetPosition).length();
            }
            else
            {
                continue;
            }
        }
        
        if (length < distance)
        {
            distance = length;
        }
        
        
    }
    return distance;
}
    
float Layout::calculateFarthestDistance(cocos2d::ui::Widget *baseWidget)
{
    float distance = -FLT_MAX;
    
    Vec2 widgetPosition =  this->getWorldCenterPoint(baseWidget);
    
    for (Node* node : _children)
    {
        Layout *layout = dynamic_cast<Layout*>(node);
        int length;
        if (layout)
        {
            length = layout->calculateFarthestDistance(baseWidget);
        }
        else
        {
            Widget* w = dynamic_cast<Widget*>(node);
            if (w && w->isFocusEnabled()) {
                Vec2 wPosition = this->getWorldCenterPoint(w);
                length = (wPosition - widgetPosition).length();
            }
            else
            {
                continue;
            }
        }
        
        if (length > distance)
        {
            distance = length;
        }
    }
    return distance;
}

int Layout::findFirstFocusEnabledWidgetIndex()
{
    ssize_t index = 0;
    ssize_t count = this->getChildren().size();
    while (index < count)
    {
        Widget* w =  dynamic_cast<Widget*>(_children.at(index));
        if (w && w->isFocusEnabled())
        {
            return (int)index;
        }
        index++;
    }
    CCASSERT(0, "invalid operation");
    return 0;
}

int Layout::findNearestChildWidgetIndex(FocusDirection direction, Widget* baseWidget)
{
    if (baseWidget == nullptr || baseWidget == this)
    {
        return this->findFirstFocusEnabledWidgetIndex();
    }
    int index = 0;
    ssize_t count = this->getChildren().size();
    
    float distance = FLT_MAX;
    int found = 0;
    if (direction == FocusDirection::LEFT || direction == FocusDirection::RIGHT ||
        direction == FocusDirection::DOWN || direction == FocusDirection::UP)
    {
        Vec2 widgetPosition =  this->getWorldCenterPoint(baseWidget);
        while (index <  count)
        {
            Widget *w = dynamic_cast<Widget*>(this->getChildren().at(index));
            if (w && w->isFocusEnabled())
            {
                Vec2 wPosition = this->getWorldCenterPoint(w);
                float length;
                Layout *layout = dynamic_cast<Layout*>(w);
                if (layout)
                {
                    length = layout->calculateNearestDistance(baseWidget);
                }
                else
                {
                    length = (wPosition - widgetPosition).getLength();
                }
               
                if (length < distance)
                {
                        found = index;
                        distance = length;
                }
            }
            index++;
        }
        return  found;
    }
    
    
    CCASSERT(0, "invalid focus direction!!!");
    return 0;
}
    
int Layout::findFarthestChildWidgetIndex(FocusDirection direction, cocos2d::ui::Widget *baseWidget)
{
    if (baseWidget == nullptr || baseWidget == this)
    {
        return this->findFirstFocusEnabledWidgetIndex();
    }
    int index = 0;
    ssize_t count = this->getChildren().size();
    
    float distance = -FLT_MAX;
    int found = 0;
    if (direction == FocusDirection::LEFT || direction == FocusDirection::RIGHT
        || direction == FocusDirection::DOWN || direction == FocusDirection::UP)
    {
        Vec2 widgetPosition =  this->getWorldCenterPoint(baseWidget);
        while (index <  count)
        {
            Widget *w = dynamic_cast<Widget*>(this->getChildren().at(index));
            if (w && w->isFocusEnabled())
            {
                Vec2 wPosition = this->getWorldCenterPoint(w);
                float length;
                Layout *layout = dynamic_cast<Layout*>(w);
                if (layout)
                {
                    length = layout->calculateFarthestDistance(baseWidget);
                }
                else
                {
                    length = (wPosition - widgetPosition).getLength();
                }
                
                if (length > distance)
                {
                    found = index;
                    distance = length;
                }
            }
            index++;
        }
        return  found;
    }
    
    CCASSERT(0, "invalid focus direction!!!");
    return 0;
}
    


Widget* Layout::findFocusEnabledChildWidgetByIndex(ssize_t index)
{
  
    Widget *widget = this->getChildWidgetByIndex(index);
    
    if (widget)
    {
        if (widget->isFocusEnabled())
        {
            return widget;
        }
        index = index + 1;
        return this->findFocusEnabledChildWidgetByIndex(index);
    }
    return nullptr;
}
    
Widget *Layout::findFirstNonLayoutWidget()
{
    Widget* widget = nullptr;
    for(Node *node : _children)
    {
        Layout* layout = dynamic_cast<Layout*>(node);
        if (layout)
        {
            widget = layout->findFirstNonLayoutWidget();
            if (widget != nullptr)
            {
                return widget;
            }
        }
        else
        {
            Widget *w = dynamic_cast<Widget*>(node);
            if (w)
            {
                widget = w;
                break;
            }
        }
        
    }
    
    return widget;
}
    
void Layout::findProperSearchingFunctor(FocusDirection dir, Widget* baseWidget)
{
    if (baseWidget == nullptr)
    {
        return;
    }
    
    Vec2 previousWidgetPosition = this->getWorldCenterPoint(baseWidget);
    
    Vec2 widgetPosition = this->getWorldCenterPoint(this->findFirstNonLayoutWidget());
    
    if (dir == FocusDirection::LEFT)
    {
        if (previousWidgetPosition.x > widgetPosition.x)
        {
            onPassFocusToChild = CC_CALLBACK_2(Layout::findNearestChildWidgetIndex, this);
        }
        else
        {
            onPassFocusToChild = CC_CALLBACK_2(Layout::findFarthestChildWidgetIndex, this);
        }
    }
    else if(dir == FocusDirection::RIGHT)
    {
        if (previousWidgetPosition.x > widgetPosition.x)
        {
            onPassFocusToChild = CC_CALLBACK_2(Layout::findFarthestChildWidgetIndex, this);
        }
        else
        {
            onPassFocusToChild = CC_CALLBACK_2(Layout::findNearestChildWidgetIndex, this);
        }
    }
    else if(dir == FocusDirection::DOWN)
    {
        if (previousWidgetPosition.y > widgetPosition.y)
        {
            onPassFocusToChild = CC_CALLBACK_2(Layout::findNearestChildWidgetIndex, this);
        }
        else
        {
            onPassFocusToChild = CC_CALLBACK_2(Layout::findFarthestChildWidgetIndex, this);
        }
    }
    else if(dir == FocusDirection::UP)
    {
        if (previousWidgetPosition.y < widgetPosition.y)
        {
            onPassFocusToChild = CC_CALLBACK_2(Layout::findNearestChildWidgetIndex, this);
        }
        else
        {
            onPassFocusToChild = CC_CALLBACK_2(Layout::findFarthestChildWidgetIndex, this);
        }
    }
    else
    {
        CCASSERT(0, "invalid direction!");
    }

}


Widget* Layout::passFocusToChild(FocusDirection dir, cocos2d::ui::Widget *current)
{
    if (checkFocusEnabledChild())
    {
        Widget* previousWidget = this->getCurrentFocusedWidget();
        
        this->findProperSearchingFunctor(dir, previousWidget);
        
        int index = onPassFocusToChild(dir, previousWidget);
        
        Widget *widget = this->getChildWidgetByIndex(index);
        Layout *layout = dynamic_cast<Layout*>(widget);
        if (layout)
        {
            layout->_isFocusPassing = true;
            return layout->findNextFocusedWidget(dir, layout);
        }
        else
        {
            this->dispatchFocusEvent(current, widget);
            return widget;
        }
    }
    else
    {
        return this;
    }
        
}

bool Layout::checkFocusEnabledChild()const
{
    bool ret = false;
    for(Node* node : _children)
    {
        Widget* widget = dynamic_cast<Widget*>(node);
        if (widget && widget->isFocusEnabled())
        {
            ret = true;
            break;
        }
    }
    return ret;
}

Widget* Layout::getChildWidgetByIndex(ssize_t index)const
{
    ssize_t size = _children.size();
    int count = 0;
    ssize_t oldIndex = index;
    Widget *widget = nullptr;
    while (index < size)
    {
        Widget* firstChild = dynamic_cast<Widget*>(_children.at(index));
        if (firstChild)
        {
            widget = firstChild;
            break;
        }
        count++;
        index++;
    }
    
    if (nullptr == widget)
    {
        int begin = 0;
        while (begin < oldIndex)
        {
            Widget* firstChild = dynamic_cast<Widget*>(_children.at(begin));
            if (firstChild)
            {
                widget = firstChild;
                break;
            }
            count++;
            begin++;
        }
    }
    
    
    return widget;
}

Widget* Layout::getPreviousFocusedWidget(FocusDirection direction, Widget *current)
{
    Widget *nextWidget = nullptr;
    ssize_t previousWidgetPos = _children.getIndex(current);
    previousWidgetPos = previousWidgetPos - 1;
    if (previousWidgetPos >= 0)
    {
        nextWidget = this->getChildWidgetByIndex(previousWidgetPos);
        if (nextWidget->isFocusEnabled())
        {
            Layout* layout = dynamic_cast<Layout*>(nextWidget);
            if (layout)
            {
                layout->_isFocusPassing = true;
                return layout->findNextFocusedWidget(direction, layout);
            }
            this->dispatchFocusEvent(current, nextWidget);
            return nextWidget;
        }
        else
        {
            //handling the disabled widget, there is no actual focus lose or get, so we don't need any event
            return this->getPreviousFocusedWidget(direction, nextWidget);
        }
    }
    else
    {
        if (_loopFocus)
        {
            if (checkFocusEnabledChild())
            {
                previousWidgetPos = _children.size()-1;
                nextWidget = this->getChildWidgetByIndex(previousWidgetPos);
                if (nextWidget->isFocusEnabled())
                {
                    Layout* layout = dynamic_cast<Layout*>(nextWidget);
                    if (layout)
                    {
                        layout->_isFocusPassing = true;
                        return layout->findNextFocusedWidget(direction, layout);
                    }
                    else
                    {
                        this->dispatchFocusEvent(current, nextWidget);
                        return nextWidget;
                    }
                }
                else
                {
                    return this->getPreviousFocusedWidget(direction, nextWidget);
                }
            }
            else
            {
                if (dynamic_cast<Layout*>(current))
                {
                    return current;
                }
                else
                {
                    return _focusedWidget;
                }
            }
        }
        else
        {
            if (isLastWidgetInContainer(current, direction))
            {
                if (isWidgetAncestorSupportLoopFocus(this, direction))
                {
                    return Widget::findNextFocusedWidget(direction, this);
                }
                if (dynamic_cast<Layout*>(current))
                {
                    return current;
                }
                else
                {
                    return _focusedWidget;
                }
            }
            else
            {
                return Widget::findNextFocusedWidget(direction, this);
            }
        }
    }
}

Widget* Layout::getNextFocusedWidget(FocusDirection direction, Widget *current)
{
    Widget *nextWidget = nullptr;
    ssize_t previousWidgetPos = _children.getIndex(current);
    previousWidgetPos = previousWidgetPos + 1;
    if (previousWidgetPos < _children.size())
    {
        nextWidget = this->getChildWidgetByIndex(previousWidgetPos);
        //handle widget
        if (nextWidget)
        {
            if (nextWidget->isFocusEnabled())
            {
                Layout* layout = dynamic_cast<Layout*>(nextWidget);
                if (layout)
                {
                    layout->_isFocusPassing = true;
                    return layout->findNextFocusedWidget(direction, layout);
                }
                else
                {
                    this->dispatchFocusEvent(current, nextWidget);
                    return nextWidget;
                }
            }
            else
            {
                return this->getNextFocusedWidget(direction, nextWidget);
            }
        }
        else
        {
            return current;
        }
    }
    else
    {
        if (_loopFocus)
        {
            if (checkFocusEnabledChild())
            {
                previousWidgetPos = 0;
                nextWidget = this->getChildWidgetByIndex(previousWidgetPos);
                if (nextWidget->isFocusEnabled())
                {
                    Layout* layout = dynamic_cast<Layout*>(nextWidget);
                    if (layout)
                    {
                        layout->_isFocusPassing = true;
                        return layout->findNextFocusedWidget(direction, layout);
                    }
                    else
                    {
                        this->dispatchFocusEvent(current, nextWidget);
                        return nextWidget;
                    }
                }
                else
                {
                    return this->getNextFocusedWidget(direction, nextWidget);
                }
            }
            else
            {
                if (dynamic_cast<Layout*>(current)) {
                    return current;
                }
                else
                {
                    return _focusedWidget;
                }
            }
        }
        else
        {
            if (isLastWidgetInContainer(current, direction))
            {
                if (isWidgetAncestorSupportLoopFocus(this, direction))
                {
                    return Widget::findNextFocusedWidget(direction, this);
                }
                if (dynamic_cast<Layout*>(current)) {
                    return current;
                }
                else
                {
                    return _focusedWidget;
                }
            }
            else
            {
                return Widget::findNextFocusedWidget(direction, this);
            }
        }
    }
}

bool  Layout::isLastWidgetInContainer(Widget* widget, FocusDirection direction)const
{
    Layout* parent = dynamic_cast<Layout*>(widget->getParent());
    if (parent == nullptr)
    {
        return true;
    }
    
    auto& container = parent->getChildren();
    ssize_t index = container.getIndex(widget);
    if (parent->getLayoutType() == Type::HORIZONTAL)
    {
        if (direction == FocusDirection::LEFT)
        {
            if (index == 0)
            {
                return isLastWidgetInContainer(parent, direction);
            }
            else
            {
                return false;
            }
        }
        if (direction == FocusDirection::RIGHT)
        {
            if (index == container.size()-1)
            {
                return isLastWidgetInContainer(parent, direction);
            }
            else
            {
                return false;
            }
        }
        if (direction == FocusDirection::DOWN)
        {
            return isLastWidgetInContainer(parent, direction);
        }
        
        if (direction == FocusDirection::UP)
        {
            return isLastWidgetInContainer(parent, direction);
        }
    }
    else if(parent->getLayoutType() == Type::VERTICAL)
    {
        if (direction == FocusDirection::UP)
        {
            if (index == 0)
            {
                return isLastWidgetInContainer(parent, direction);
                
            }
            else
            {
                return false;
            }
        }
        if (direction == FocusDirection::DOWN)
        {
            if (index == container.size() - 1)
            {
                return isLastWidgetInContainer(parent, direction);
            }
            else
            {
                return false;
            }
        }
        if (direction == FocusDirection::LEFT)
        {
            return isLastWidgetInContainer(parent, direction);
        }
        
        if (direction == FocusDirection::RIGHT)
        {
            return isLastWidgetInContainer(parent, direction);
        }
    }
    else
    {
        CCASSERT(0, "invalid layout Type");
        return false;
    }
    
    return false;
}

bool  Layout::isWidgetAncestorSupportLoopFocus(Widget* widget, FocusDirection direction)const
{
    Layout* parent = dynamic_cast<Layout*>(widget->getParent());
    if (parent == nullptr)
    {
        return false;
    }
    if (parent->isLoopFocus())
    {
        auto layoutType = parent->getLayoutType();
        if (layoutType == Type::HORIZONTAL)
        {
            if (direction == FocusDirection::LEFT || direction == FocusDirection::RIGHT)
            {
                return true;
            }
            else
            {
                return isWidgetAncestorSupportLoopFocus(parent, direction);
            }
        }
        if (layoutType == Type::VERTICAL)
        {
            if (direction == FocusDirection::DOWN || direction == FocusDirection::UP)
            {
                return true;
            }
            else
            {
                return isWidgetAncestorSupportLoopFocus(parent, direction);
            }
        }
        else
        {
            CCASSERT(0, "invalid layout type");
            return false;
        }
    }
    else
    {
        return isWidgetAncestorSupportLoopFocus(parent, direction);
    }
}

Widget* Layout::findNextFocusedWidget(FocusDirection direction, Widget* current)
{
    if (_isFocusPassing || this->isFocused())
    {
        Layout* parent = dynamic_cast<Layout*>(this->getParent());
        _isFocusPassing = false;
        
        if (_passFocusToChild)
        {
            Widget * w = this->passFocusToChild(direction, current);
            if (dynamic_cast<Layout*>(w))
            {
                if (parent)
                {
                    parent->_isFocusPassing = true;
                    return parent->findNextFocusedWidget(direction, this);
                }
            }
            return w;
        }
        
        if (nullptr == parent)
        {
            return this;
        }
        parent->_isFocusPassing = true;
        return parent->findNextFocusedWidget(direction, this);
            
    }
    else if(current->isFocused() || dynamic_cast<Layout*>(current))
    {
        if (_layoutType == Type::HORIZONTAL)
        {
            switch (direction)
            {
                case FocusDirection::LEFT:
                {
                    return this->getPreviousFocusedWidget(direction, current);
                }break;
                case FocusDirection::RIGHT:
                {
                    return this->getNextFocusedWidget(direction, current);
                }break;
                case FocusDirection::DOWN:
                case FocusDirection::UP:
                {
                    if (isLastWidgetInContainer(this, direction))
                    {
                        if (isWidgetAncestorSupportLoopFocus(current, direction))
                        {
                            return Widget::findNextFocusedWidget(direction, this);
                        }
                        return current;
                    }
                    else
                    {
                        return Widget::findNextFocusedWidget(direction, this);
                    }
                }break;
                default:
                {
                    CCASSERT(0, "Invalid Focus Direction");
                    return current;
                }
                    break;
            }
        }
        else if (_layoutType == Type::VERTICAL)
        {
            switch (direction)
            {
                case FocusDirection::LEFT:
                case FocusDirection::RIGHT:
                {
                    if (isLastWidgetInContainer(this, direction))
                    {
                        if (isWidgetAncestorSupportLoopFocus(current, direction))
                        {
                            return Widget::findNextFocusedWidget(direction, this);
                        }
                        return current;
                    }
                    else
                    {
                        return Widget::findNextFocusedWidget(direction, this);
                    }
                } break;
                case FocusDirection::DOWN:
                {
                    return getNextFocusedWidget(direction, current);
                }
                    break;
                case FocusDirection::UP:
                {
                    return getPreviousFocusedWidget(direction, current);
                }
                    break;
                default:
                {
                    CCASSERT(0, "Invalid Focus Direction");
                    return current;
                }
                    break;
            }
        }
        else
        {
            CCASSERT(0, "Un Supported Layout type, please use VBox and HBox instead!!!");
            return current;
        }
    }
    else
    {
        return current;
    }
}
    
void Layout::setCameraMask(unsigned short mask, bool applyChildren)
{
    Widget::setCameraMask(mask, applyChildren);
    if (_clippingStencil){
        _clippingStencil->setCameraMask(mask, applyChildren);
    }
}
    
ResourceData Layout::getRenderFile()
{
    ResourceData rData;
    rData.type = (int)_bgImageTexType;
    rData.file = _backGroundImageFileName;
    return rData;
}

}
NS_CC_END