axmol/cocos/ui/UIWidget.cpp

/****************************************************************************
Copyright (c) 2013-2014 Chukong Technologies Inc.

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
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/

#include "ui/UIWidget.h"
#include "ui/UILayout.h"
#include "ui/UIHelper.h"

NS_CC_BEGIN

namespace ui {

Widget* Widget::_focusedWidget = nullptr;
Widget* Widget::_realFocusedWidget = nullptr;
    
Widget::Widget():
_enabled(true),
_bright(true),
_touchEnabled(false),
_highlight(false),
_brightStyle(BrightStyle::NONE),
_touchStartPos(Vec2::ZERO),
_touchMovePos(Vec2::ZERO),
_touchEndPos(Vec2::ZERO),
_touchEventListener(nullptr),
_touchEventSelector(nullptr),
_name("default"),
_actionTag(0),
_size(Size::ZERO),
_customSize(Size::ZERO),
_ignoreSize(false),
_affectByClipping(false),
_sizeType(SizeType::ABSOLUTE),
_sizePercent(Vec2::ZERO),
_positionType(PositionType::ABSOLUTE),
_positionPercent(Vec2::ZERO),
_reorderWidgetChildDirty(true),
_hitted(false),
_touchListener(nullptr),
_color(Color3B::WHITE),
_opacity(255),
_flippedX(false),
_flippedY(false),
_focused(false),
_focusEnabled(true),
_layoutParameterType(LayoutParameter::Type::NONE)
{
    onFocusChanged = CC_CALLBACK_2(Widget::onFocusChange,this);
    onNextFocusedWidget = nullptr;
    this->setAnchorPoint(Vec2(0.5f, 0.5f));
    this->setTouchEnabled(true);
}

Widget::~Widget()
{
    setTouchEnabled(false);
    
    //cleanup focused widget
    if (_focusedWidget == this) {
        _focusedWidget = nullptr;
    }
    if (_realFocusedWidget == this) {
        _realFocusedWidget = nullptr;
    }
}

Widget* Widget::create()
{
    Widget* widget = new Widget();
    if (widget && widget->init())
    {
        widget->autorelease();
        return widget;
    }
    CC_SAFE_DELETE(widget);
    return nullptr;
}

bool Widget::init()
{
    if (ProtectedNode::init())
    {
        initRenderer();
        setBright(true);
        ignoreContentAdaptWithSize(true);
        setAnchorPoint(Vec2(0.5f, 0.5f));
        return true;
    }
    return false;
}

void Widget::onEnter()
{
    updateSizeAndPosition();
    ProtectedNode::onEnter();
}

void Widget::onExit()
{
    unscheduleUpdate();
    ProtectedNode::onExit();
}

void Widget::visit(Renderer *renderer, const Mat4 &parentTransform, bool parentTransformUpdated)
{
    if (_visible)
    {
        adaptRenderers();
        ProtectedNode::visit(renderer, parentTransform, parentTransformUpdated);
    }
}

Widget* Widget::getWidgetParent()
{
    return dynamic_cast<Widget*>(getParent());
}

void Widget::setEnabled(bool enabled)
{
    _enabled = enabled;
}

Widget* Widget::getChildByName(const std::string& name)
{
    for (auto& child : _children)
    {
        if (child)
        {
            Widget* widgetChild = dynamic_cast<Widget*>(child);
            if (widgetChild)
            {
                if (widgetChild->getName() == name)
                {
                    return widgetChild;
                }
            }
        }
    }
    return nullptr;
}
    
void Widget::initRenderer()
{
}

void Widget::setSize(const Size &size)
{
    _customSize = size;
    if (_ignoreSize)
    {
        _size = getVirtualRendererSize();
    }
    else
    {
        _size = size;
    }
    if (_running)
    {
        Widget* widgetParent = getWidgetParent();
        Size pSize;
        if (widgetParent)
        {
            pSize = widgetParent->getSize();
        }
        else
        {
            pSize = _parent->getContentSize();
        }
        float spx = 0.0f;
        float spy = 0.0f;
        if (pSize.width > 0.0f)
        {
            spx = _customSize.width / pSize.width;
        }
        if (pSize.height > 0.0f)
        {
            spy = _customSize.height / pSize.height;
        }
        _sizePercent = Vec2(spx, spy);
    }
    onSizeChanged();
}

void Widget::setSizePercent(const Vec2 &percent)
{
    _sizePercent = percent;
    Size cSize = _customSize;
    if (_running)
    {
        Widget* widgetParent = getWidgetParent();
        if (widgetParent)
        {
            cSize = Size(widgetParent->getSize().width * percent.x , widgetParent->getSize().height * percent.y);
        }
        else
        {
            cSize = Size(_parent->getContentSize().width * percent.x , _parent->getContentSize().height * percent.y);
        }
    }
    if (_ignoreSize)
    {
        _size = getVirtualRendererSize();
    }
    else
    {
        _size = cSize;
    }
    _customSize = cSize;
    onSizeChanged();
}

void Widget::updateSizeAndPosition()
{
    Widget* widgetParent = getWidgetParent();
    Size pSize;
    if (widgetParent)
    {
        pSize = widgetParent->getSize();
    }
    else
    {
        pSize = _parent->getContentSize();
    }
    updateSizeAndPosition(pSize);
}
    
void Widget::updateSizeAndPosition(const cocos2d::Size &parentSize)
{
    switch (_sizeType)
    {
        case SizeType::ABSOLUTE:
        {
            if (_ignoreSize)
            {
                _size = getVirtualRendererSize();
            }
            else
            {
                _size = _customSize;
            }
            float spx = 0.0f;
            float spy = 0.0f;
            if (parentSize.width > 0.0f)
            {
                spx = _customSize.width / parentSize.width;
            }
            if (parentSize.height > 0.0f)
            {
                spy = _customSize.height / parentSize.height;
            }
            _sizePercent = Vec2(spx, spy);
            break;
        }
        case SizeType::PERCENT:
        {
            Size cSize = Size(parentSize.width * _sizePercent.x , parentSize.height * _sizePercent.y);
            if (_ignoreSize)
            {
                _size = getVirtualRendererSize();
            }
            else
            {
                _size = cSize;
            }
            _customSize = cSize;
            break;
        }
        default:
            break;
    }
    onSizeChanged();
    Vec2 absPos = getPosition();
    switch (_positionType)
    {
        case PositionType::ABSOLUTE:
        {
            if (parentSize.width <= 0.0f || parentSize.height <= 0.0f)
            {
                _positionPercent = Vec2::ZERO;
            }
            else
            {
                _positionPercent = Vec2(absPos.x / parentSize.width, absPos.y / parentSize.height);
            }
            break;
        }
        case PositionType::PERCENT:
        {
            absPos = Vec2(parentSize.width * _positionPercent.x, parentSize.height * _positionPercent.y);
            break;
        }
        default:
            break;
    }
    setPosition(absPos);
}

void Widget::setSizeType(SizeType type)
{
    _sizeType = type;
}

Widget::SizeType Widget::getSizeType() const
{
    return _sizeType;
}

void Widget::ignoreContentAdaptWithSize(bool ignore)
{
    if (_ignoreSize == ignore)
    {
        return;
    }
    _ignoreSize = ignore;
    if (_ignoreSize)
    {
        Size s = getVirtualRendererSize();
        _size = s;
    }
    else
    {
        _size = _customSize;
    }
    onSizeChanged();
}

bool Widget::isIgnoreContentAdaptWithSize() const
{
    return _ignoreSize;
}

const Size& Widget::getSize() const
{
    return _size;
}
    
const Size& Widget::getCustomSize() const
{
    return _customSize;
}

const Vec2& Widget::getSizePercent() const
{
    return _sizePercent;
}

Vec2 Widget::getWorldPosition()
{
    return convertToWorldSpace(Vec2(_anchorPoint.x * _contentSize.width, _anchorPoint.y * _contentSize.height));
}

Node* Widget::getVirtualRenderer()
{
    return this;
}

void Widget::onSizeChanged()
{
    setContentSize(_size);
    for (auto& child : getChildren())
    {
        Widget* widgetChild = dynamic_cast<Widget*>(child);
        if (widgetChild)
        {
            widgetChild->updateSizeAndPosition();
        }
    }
}

const Size& Widget::getVirtualRendererSize() const
{
    return _contentSize;
}
    
void Widget::updateContentSizeWithTextureSize(const cocos2d::Size &size)
{
    if (_ignoreSize)
    {
        _size = size;
    }
    else
    {
        _size = _customSize;
    }
    onSizeChanged();
}

void Widget::setTouchEnabled(bool enable)
{
    if (enable == _touchEnabled)
    {
        return;
    }
    _touchEnabled = enable;
    if (_touchEnabled)
    {
        _touchListener = EventListenerTouchOneByOne::create();
        CC_SAFE_RETAIN(_touchListener);
        _touchListener->setSwallowTouches(true);
        _touchListener->onTouchBegan = CC_CALLBACK_2(Widget::onTouchBegan, this);
        _touchListener->onTouchMoved = CC_CALLBACK_2(Widget::onTouchMoved, this);
        _touchListener->onTouchEnded = CC_CALLBACK_2(Widget::onTouchEnded, this);
        _touchListener->onTouchCancelled = CC_CALLBACK_2(Widget::onTouchCancelled, this);
        _eventDispatcher->addEventListenerWithSceneGraphPriority(_touchListener, this);
    }
    else
    {
        _eventDispatcher->removeEventListener(_touchListener);
        CC_SAFE_RELEASE_NULL(_touchListener);
    }
}

bool Widget::isTouchEnabled() const
{
    return _touchEnabled;
}

bool Widget::isHighlighted() const
{
    return _highlight;
}

void Widget::setHighlighted(bool hilight)
{
    if (hilight == _highlight)
    {
        return;
    }
    _highlight = hilight;
    if (_bright)
    {
        if (_highlight)
        {
            setBrightStyle(BrightStyle::HIGHLIGHT);
        }
        else
        {
            setBrightStyle(BrightStyle::NORMAL);
        }
    }
    else
    {
        onPressStateChangedToDisabled();
    }
}

void Widget::setBright(bool bright)
{
    _bright = bright;
    if (_bright)
    {
        _brightStyle = BrightStyle::NONE;
        setBrightStyle(BrightStyle::NORMAL);
    }
    else
    {
        onPressStateChangedToDisabled();
    }
}

void Widget::setBrightStyle(BrightStyle style)
{
    if (_brightStyle == style)
    {
        return;
    }
    _brightStyle = style;
    switch (_brightStyle)
    {
        case BrightStyle::NORMAL:
            onPressStateChangedToNormal();
            break;
        case BrightStyle::HIGHLIGHT:
            onPressStateChangedToPressed();
            break;
        default:
            break;
    }
}

void Widget::onPressStateChangedToNormal()
{

}

void Widget::onPressStateChangedToPressed()
{

}

void Widget::onPressStateChangedToDisabled()
{

}

    
Widget* Widget::getAncensterWidget(Node* node)
{
    if (nullptr == node)
    {
        return nullptr;
    }
    
    Node* parent = node->getParent();
    if (nullptr == parent)
    {
        return nullptr;
    }
    Widget* parentWidget = dynamic_cast<Widget*>(parent);
    if (parentWidget)
    {
        return parentWidget;
    }
    else
    {
        return this->getAncensterWidget(parent->getParent());
    }
}
    
bool Widget::isAncestorsVisible(Node* node)
{
    if (nullptr == node)
    {
        return true;
    }
    Node* parent = node->getParent();
    
    if (parent && !parent->isVisible())
    {
        return false;
    }
    return this->isAncestorsVisible(parent);
}
    
bool Widget::isAncestorsEnabled()
{
    Widget* parentWidget = this->getAncensterWidget(this);
    if (parentWidget == nullptr)
    {
        return true;
    }
    if (parentWidget && !parentWidget->isEnabled())
    {
        return false;
    }
    
    return parentWidget->isAncestorsEnabled();
}

bool Widget::onTouchBegan(Touch *touch, Event *unusedEvent)
{
    _hitted = false;
    if (isVisible() && isEnabled() && isAncestorsEnabled() && isAncestorsVisible(this) )
    {
        _touchStartPos = touch->getLocation();
        if(hitTest(_touchStartPos) && clippingParentAreaContainPoint(_touchStartPos))
        {
            _hitted = true;
        }
    }
    if (!_hitted)
    {
        return false;
    }
    setHighlighted(true);
    Widget* widgetParent = getWidgetParent();
    if (widgetParent)
    {
        widgetParent->checkChildInfo(0,this,_touchStartPos);
    }
    pushDownEvent();
    return true;
}

void Widget::onTouchMoved(Touch *touch, Event *unusedEvent)
{
    _touchMovePos = touch->getLocation();
    setHighlighted(hitTest(_touchMovePos));
    Widget* widgetParent = getWidgetParent();
    if (widgetParent)
    {
        widgetParent->checkChildInfo(1,this,_touchMovePos);
    }
    moveEvent();
}

void Widget::onTouchEnded(Touch *touch, Event *unusedEvent)
{
    _touchEndPos = touch->getLocation();
    bool highlight = _highlight;
    setHighlighted(false);
    Widget* widgetParent = getWidgetParent();
    if (widgetParent)
    {
        widgetParent->checkChildInfo(2,this,_touchEndPos);
    }
    if (highlight)
    {
        releaseUpEvent();
    }
    else
    {
        cancelUpEvent();
    }
}

void Widget::onTouchCancelled(Touch *touch, Event *unusedEvent)
{
    setHighlighted(false);
    cancelUpEvent();
}

void Widget::pushDownEvent()
{
    if (_touchEventCallback) {
        _touchEventCallback(this, TouchEventType::BEGAN);
    }
    
    if (_touchEventListener && _touchEventSelector)
    {
        (_touchEventListener->*_touchEventSelector)(this,TOUCH_EVENT_BEGAN);
    }
}

void Widget::moveEvent()
{
    if (_touchEventCallback) {
        _touchEventCallback(this, TouchEventType::MOVED);
    }
    
    if (_touchEventListener && _touchEventSelector)
    {
        (_touchEventListener->*_touchEventSelector)(this,TOUCH_EVENT_MOVED);
    }
}

void Widget::releaseUpEvent()
{
    
    if (_touchEventCallback) {
        _touchEventCallback(this, TouchEventType::ENDED);
    }
    
    if (_touchEventListener && _touchEventSelector)
    {
        (_touchEventListener->*_touchEventSelector)(this,TOUCH_EVENT_ENDED);
    }
}

void Widget::cancelUpEvent()
{
    if (_touchEventCallback)
    {
        _touchEventCallback(this, TouchEventType::CANCELED);
    }
   
    if (_touchEventListener && _touchEventSelector)
    {
        (_touchEventListener->*_touchEventSelector)(this,TOUCH_EVENT_CANCELED);
    }
   
}

void Widget::addTouchEventListener(Ref *target, SEL_TouchEvent selector)
{
    _touchEventListener = target;
    _touchEventSelector = selector;
}
    
void Widget::addTouchEventListener(Widget::ccWidgetTouchCallback callback)
{
    this->_touchEventCallback = callback;
}

bool Widget::hitTest(const Vec2 &pt)
{
    Vec2 nsp = convertToNodeSpace(pt);
    Rect bb;
    bb.size = _contentSize;
    if (bb.containsPoint(nsp))
    {
        return true;
    }
    return false;
}

bool Widget::clippingParentAreaContainPoint(const Vec2 &pt)
{
    _affectByClipping = false;
    Widget* parent = getWidgetParent();
    Widget* clippingParent = nullptr;
    while (parent)
    {
        Layout* layoutParent = dynamic_cast<Layout*>(parent);
        if (layoutParent)
        {
            if (layoutParent->isClippingEnabled())
            {
                _affectByClipping = true;
                clippingParent = layoutParent;
                break;
            }
        }
        parent = parent->getWidgetParent();
    }

    if (!_affectByClipping)
    {
        return true;
    }


    if (clippingParent)
    {
        bool bRet = false;
        if (clippingParent->hitTest(pt))
        {
            bRet = true;
        }
        if (bRet)
        {
            return clippingParent->clippingParentAreaContainPoint(pt);
        }
        return false;
    }
    return true;
}

void Widget::checkChildInfo(int handleState, Widget *sender, const Vec2 &touchPoint)
{
    Widget* widgetParent = getWidgetParent();
    if (widgetParent)
    {
        widgetParent->checkChildInfo(handleState,sender,touchPoint);
    }
}

void Widget::setPosition(const Vec2 &pos)
{
    if (_running)
    {
        Widget* widgetParent = getWidgetParent();
        if (widgetParent)
        {
            Size pSize = widgetParent->getSize();
            if (pSize.width <= 0.0f || pSize.height <= 0.0f)
            {
                _positionPercent = Vec2::ZERO;
            }
            else
            {
                _positionPercent = Vec2(pos.x / pSize.width, pos.y / pSize.height);
            }
        }
    }
    ProtectedNode::setPosition(pos);
}

void Widget::setPositionPercent(const Vec2 &percent)
{
    _positionPercent = percent;
    if (_running)
    {
        Widget* widgetParent = getWidgetParent();
        if (widgetParent)
        {
            Size parentSize = widgetParent->getSize();
            Vec2 absPos = Vec2(parentSize.width * _positionPercent.x, parentSize.height * _positionPercent.y);
            setPosition(absPos);
        }
    }
}

const Vec2& Widget::getPositionPercent()
{
    return _positionPercent;
}

void Widget::setPositionType(PositionType type)
{
    _positionType = type;
}

Widget::PositionType Widget::getPositionType() const
{
    return _positionType;
}

bool Widget::isBright() const
{
    return _bright;
}

bool Widget::isEnabled() const
{
    return _enabled;
}

float Widget::getLeftBoundary() const
{
    return getPosition().x - getAnchorPoint().x * _size.width;
}

float Widget::getBottomBoundary() const
{
    return getPosition().y - getAnchorPoint().y * _size.height;
}

float Widget::getRightBoundary() const
{
    return getLeftBoundary() + _size.width;
}

float Widget::getTopBoundary() const
{
    return getBottomBoundary() + _size.height;
}

const Vec2& Widget::getTouchStartPos()
{
    return _touchStartPos;
}

const Vec2& Widget::getTouchMovePos()
{
    return _touchMovePos;
}

const Vec2& Widget::getTouchEndPos()
{
    return _touchEndPos;
}

void Widget::setName(const std::string& name)
{
    _name = name;
}

const std::string& Widget::getName() const
{
    return _name;
}


void Widget::setLayoutParameter(LayoutParameter *parameter)
{
    if (!parameter)
    {
        return;
    }
    _layoutParameterDictionary.insert((int)parameter->getLayoutType(), parameter);
    _layoutParameterType = parameter->getLayoutType();
}

LayoutParameter* Widget::getLayoutParameter()
{
    return dynamic_cast<LayoutParameter*>(_layoutParameterDictionary.at((int)_layoutParameterType));
}

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

Widget* Widget::clone()
{
    Widget* clonedWidget = createCloneInstance();
    clonedWidget->copyProperties(this);
    clonedWidget->copyClonedWidgetChildren(this);
    return clonedWidget;
}

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

void Widget::copyClonedWidgetChildren(Widget* model)
{
    auto& modelChildren = model->getChildren();

    for (auto& subWidget : modelChildren)
    {
        Widget* child = dynamic_cast<Widget*>(subWidget);
        if (child)
        {
            addChild(child->clone());
        }
    }
}

void Widget::copySpecialProperties(Widget* model)
{

}

void Widget::copyProperties(Widget *widget)
{
    setEnabled(widget->isEnabled());
    setVisible(widget->isVisible());
    setBright(widget->isBright());
    setTouchEnabled(widget->isTouchEnabled());
    setLocalZOrder(widget->getLocalZOrder());
    setTag(widget->getTag());
    setName(widget->getName());
    setActionTag(widget->getActionTag());
    _ignoreSize = widget->_ignoreSize;
    _size = widget->_size;
    _customSize = widget->_customSize;
    copySpecialProperties(widget);
    _sizeType = widget->getSizeType();
    _sizePercent = widget->_sizePercent;
    _positionType = widget->_positionType;
    _positionPercent = widget->_positionPercent;
    setPosition(widget->getPosition());
    setAnchorPoint(widget->getAnchorPoint());
    setScaleX(widget->getScaleX());
    setScaleY(widget->getScaleY());
    setRotation(widget->getRotation());
    setRotationSkewX(widget->getRotationSkewX());
    setRotationSkewY(widget->getRotationSkewY());
    setFlippedX(widget->isFlippedX());
    setFlippedY(widget->isFlippedY());
    setColor(widget->getColor());
    setOpacity(widget->getOpacity());
    //FIXME:copy focus properties, also make sure all the subclass the copy behavior is correct
    Map<int, LayoutParameter*>& layoutParameterDic = widget->_layoutParameterDictionary;
    for (auto iter = layoutParameterDic.begin(); iter != layoutParameterDic.end(); ++iter)
    {
        setLayoutParameter(iter->second->clone());
    }
    onSizeChanged();
}
    
void Widget::setColor(const Color3B& color)
{
    _color = color;
    updateTextureColor();
}

void Widget::setOpacity(GLubyte opacity)
{
    _opacity = opacity;
    updateTextureOpacity();
}
    
void Widget::setFlippedX(bool flippedX)
{
    _flippedX = flippedX;
    updateFlippedX();
}

void Widget::setFlippedY(bool flippedY)
{
    _flippedY = flippedY;
    updateFlippedY();
}

void Widget::updateColorToRenderer(Node* renderer)
{
    renderer->setColor(_color);
}

void Widget::updateOpacityToRenderer(Node* renderer)
{
    renderer->setOpacity(_opacity);
}

void Widget::updateRGBAToRenderer(Node* renderer)
{
    renderer->setColor(_color);
    renderer->setOpacity(_opacity);
}

/*temp action*/
void Widget::setActionTag(int tag)
{
	_actionTag = tag;
}

int Widget::getActionTag()
{
	return _actionTag;
}
    
void Widget::setFocused(bool focus)
{
    _focused = focus;
    
    //make sure there is only one focusedWidget
    if (focus) {
        _focusedWidget = this;
        if (!dynamic_cast<Layout*>(this)) {
            _realFocusedWidget = this;
        }
    }
    
}

bool Widget::isFocused()
{
    return _focused;
}

void Widget::setFocusEnabled(bool enable)
{
    _focusEnabled = enable;
}

bool Widget::isFocusEnabled()
{
    return _focusEnabled;
}

Widget* Widget::findNextFocusedWidget(FocusDirection direction,  Widget* current)
{
    if (nullptr == onNextFocusedWidget || nullptr == onNextFocusedWidget(direction) ) {
        if (this->isFocused() || !current->isFocusEnabled())
        {
            Node* parent = this->getParent();
            
            Layout* layout = dynamic_cast<Layout*>(parent);
            if (nullptr == layout)
            {
                //the outer layout's default behaviour is : loop focus
                if (dynamic_cast<Layout*>(current))
                {
                    return current->findNextFocusedWidget(direction, current);
                }
                return current;
            }
            else
            {
                Widget *nextWidget = layout->findNextFocusedWidget(direction, current);
                return nextWidget;
            }
        }
        else
        {
            return current;
        }
    }
    else
    {
        Widget *getFocusWidget = onNextFocusedWidget(direction);
        this->dispatchFocusEvent(this, getFocusWidget);
        return getFocusWidget;
    }
}

void Widget::dispatchFocusEvent(cocos2d::ui::Widget *widgetLoseFocus, cocos2d::ui::Widget *widgetGetFocus)
{
    //if the widgetLoseFocus doesn't get focus, it will use the previous focused widget instead
    if (widgetLoseFocus && !widgetLoseFocus->isFocused())
    {
        widgetLoseFocus = _focusedWidget;
    }
    
    if (widgetGetFocus != widgetLoseFocus)
    {
        
        if (widgetGetFocus)
        {
            widgetGetFocus->onFocusChanged(widgetLoseFocus, widgetGetFocus);
        }
        
        if (widgetLoseFocus)
        {
            widgetLoseFocus->onFocusChanged(widgetLoseFocus, widgetGetFocus);
        }
        
        EventFocus event(widgetLoseFocus, widgetGetFocus);
        auto dispatcher = cocos2d::Director::getInstance()->getEventDispatcher();
        dispatcher->dispatchEvent(&event);
    }
    
}

void Widget::requestFocus()
{
    if (this == _focusedWidget)
    {
        return;
    }
    
    this->dispatchFocusEvent(_focusedWidget, this);
}
    
void Widget::onFocusChange(Widget* widgetLostFocus, Widget* widgetGetFocus)
{
    //only change focus when there is indeed a get&lose happens
    if (widgetLostFocus)
    {
        widgetLostFocus->setFocused(false);
    }
    
    if (widgetGetFocus)
    {
        widgetGetFocus->setFocused(true);
    }
}

Widget* Widget::getCurrentFocusedWidget(bool isWidget)
{
    if (isWidget) {
        return _realFocusedWidget;
    }
    return _focusedWidget;
}



}

NS_CC_END