text: /****************************************************************************
  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
  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"
  #include "base/CCEventListenerTouch.h"
  #include "base/CCEventListenerKeyboard.h"
  #include "base/CCDirector.h"
  #include "base/CCEventFocus.h"
  #include "base/CCEventDispatcher.h"
  #include "ui/UILayoutComponent.h"
  #include "renderer/CCGLProgram.h"
  #include "renderer/CCGLProgramState.h"
  #include "renderer/ccShaders.h"
  #include "2d/CCCamera.h"
  #include "2d/CCSprite.h"
  #include "ui/UIScale9Sprite.h"
  
  NS_CC_BEGIN
  
  namespace ui {
  
  class Widget::FocusNavigationController
  {
      void enableFocusNavigation(bool flag);
  
      FocusNavigationController():
      _keyboardListener(nullptr),
      _firstFocusedWidget(nullptr),
      _enableFocusNavigation(false),
      _keyboardEventPriority(1)
      {
          //no-op
      }
      ~FocusNavigationController();
  protected:
      void setFirstFocusedWidget(Widget* widget);
  
      void onKeypadKeyPressed(EventKeyboard::KeyCode, Event*);
  
      void addKeyboardEventListener();
      void removeKeyboardEventListener();
  
      friend class Widget;
  private:
      EventListenerKeyboard* _keyboardListener ;
      Widget* _firstFocusedWidget ;
      bool _enableFocusNavigation ;
      const int _keyboardEventPriority;
  };
  
  Widget::FocusNavigationController::~FocusNavigationController()
  {
      this->removeKeyboardEventListener();
  }
  
  void Widget::FocusNavigationController::onKeypadKeyPressed(EventKeyboard::KeyCode  keyCode, Event* /*event*/)
  {
      if (_enableFocusNavigation && _firstFocusedWidget)
      {
          if (keyCode == EventKeyboard::KeyCode::KEY_DPAD_DOWN)
          {
              _firstFocusedWidget = _firstFocusedWidget->findNextFocusedWidget(Widget::FocusDirection::DOWN, _firstFocusedWidget);
          }
          if (keyCode == EventKeyboard::KeyCode::KEY_DPAD_UP)
          {
              _firstFocusedWidget = _firstFocusedWidget->findNextFocusedWidget(Widget::FocusDirection::UP, _firstFocusedWidget);
          }
          if (keyCode == EventKeyboard::KeyCode::KEY_DPAD_LEFT)
          {
              _firstFocusedWidget = _firstFocusedWidget->findNextFocusedWidget(Widget::FocusDirection::LEFT, _firstFocusedWidget);
          }
          if (keyCode == EventKeyboard::KeyCode::KEY_DPAD_RIGHT)
          {
              _firstFocusedWidget = _firstFocusedWidget->findNextFocusedWidget(Widget::FocusDirection::RIGHT, _firstFocusedWidget);
          }
      }
  }
  
  void Widget::FocusNavigationController::enableFocusNavigation(bool flag)
  {
      if (_enableFocusNavigation == flag)
          return;
  
      _enableFocusNavigation = flag;
  
      if (flag)
          this->addKeyboardEventListener();
      else
          this->removeKeyboardEventListener();
  }
  
  void Widget::FocusNavigationController::setFirstFocusedWidget(Widget* widget)
  {
      _firstFocusedWidget = widget;
  }
  
  void Widget::FocusNavigationController::addKeyboardEventListener()
  {
      if (nullptr == _keyboardListener)
      {
          _keyboardListener = EventListenerKeyboard::create();
          _keyboardListener->onKeyReleased = CC_CALLBACK_2(Widget::FocusNavigationController::onKeypadKeyPressed, this);
          EventDispatcher* dispatcher = Director::getInstance()->getEventDispatcher();
          dispatcher->addEventListenerWithFixedPriority(_keyboardListener, _keyboardEventPriority);
      }
  }
  
  void Widget::FocusNavigationController::removeKeyboardEventListener()
  {
      if (nullptr != _keyboardListener)
      {
          EventDispatcher* dispatcher = Director::getInstance()->getEventDispatcher();
          dispatcher->removeEventListener(_keyboardListener);
          _keyboardListener = nullptr;
      }
  }
  
  Widget* Widget::_focusedWidget = nullptr;
  Widget::FocusNavigationController* Widget::_focusNavigationController = nullptr;
  
  Widget::Widget():
  _usingLayoutComponent(false),
  _unifySize(false),
  _enabled(true),
  _bright(true),
  _touchEnabled(false),
  _highlight(false),
  _affectByClipping(false),
  _ignoreSize(false),
  _propagateTouchEvents(true),
  _brightStyle(BrightStyle::NONE),
  _sizeType(SizeType::ABSOLUTE),
  _positionType(PositionType::ABSOLUTE),
  _actionTag(0),
  _customSize(Size::ZERO),
  _hitted(false),
  _hittedByCamera(nullptr),
  _touchListener(nullptr),
  _flippedX(false),
  _flippedY(false),
  _layoutParameterType(LayoutParameter::Type::NONE),
  _focused(false),
  _focusEnabled(true),
  _touchEventListener(nullptr),
  _touchEventSelector(nullptr),
  _ccEventCallback(nullptr),
  _callbackType(""),
  _callbackName(""),
  _cancelEatMsg(true),
  _event(nullptr)
  {
  
  }
  
  Widget::~Widget()
  {
      this->cleanupWidget();
  }
  
  void Widget::cleanupWidget()
  {
      //clean up _touchListener
      _eventDispatcher->removeEventListener(_touchListener);
      CC_SAFE_RELEASE_NULL(_touchListener);
  
      //cleanup focused widget and focus navigation controller
      if (_focusedWidget == this)
      {
          //delete
          CC_SAFE_DELETE(_focusNavigationController);
          _focusedWidget = nullptr;
      }
  
  }
  
  Widget* Widget::create()
  {
      Widget* widget = new (std::nothrow) Widget();
      if (widget && widget->init())
      {
          widget->autorelease();
          return widget;
      }
      CC_SAFE_DELETE(widget);
      return nullptr;
  }
  
  bool Widget::init()
  {
      if (ProtectedNode::init())
      {
          initRenderer();
          setBright(true);
          onFocusChanged = CC_CALLBACK_2(Widget::onFocusChange,this);
          onNextFocusedWidget = nullptr;
          this->setAnchorPoint(Vec2(0.5f, 0.5f));
  
          ignoreContentAdaptWithSize(true);
  
          return true;
      }
      return false;
  }
  
  void Widget::onEnter()
  {
  #if CC_ENABLE_SCRIPT_BINDING
      if (_scriptType == kScriptTypeJavascript)
      {
          if (ScriptEngineManager::sendNodeEventToJSExtended(this, kNodeOnEnter))
              return;
      }
  #endif
      
      if (!_usingLayoutComponent)
          updateSizeAndPosition();
      ProtectedNode::onEnter();
  }
  
  void Widget::onExit()
  {
  #if CC_ENABLE_SCRIPT_BINDING
      if (_scriptType == kScriptTypeJavascript)
      {
          if (ScriptEngineManager::sendNodeEventToJSExtended(this, kNodeOnExit))
              return;
      }
  #endif
      
      unscheduleUpdate();
      ProtectedNode::onExit();
  }
  
  void Widget::visit(Renderer *renderer, const Mat4 &parentTransform, uint32_t parentFlags)
  {
      if (_visible)
      {
          adaptRenderers();
          ProtectedNode::visit(renderer, parentTransform, parentFlags);
      }
  }
  
  Widget* Widget::getWidgetParent()
  {
      return dynamic_cast<Widget*>(getParent());
  }
  
  void Widget::setEnabled(bool enabled)
  {
      _enabled = enabled;
      setBright(enabled);
  }
  
  void Widget::initRenderer()
  {
  }
  
  LayoutComponent* Widget::getOrCreateLayoutComponent()
  {
      auto layoutComponent = this->getComponent(__LAYOUT_COMPONENT_NAME);
      if (nullptr == layoutComponent)
      {
          LayoutComponent *component = LayoutComponent::create();
          this->addComponent(component);
          layoutComponent = component;
      }
  
      return (LayoutComponent*)layoutComponent;
  }
  
  void Widget::setContentSize(const cocos2d::Size &contentSize)
  {
      Size previousSize = ProtectedNode::getContentSize();
      if(previousSize.equals(contentSize))
      {
          return;
      }
      ProtectedNode::setContentSize(contentSize);
  
      _customSize = contentSize;
      if (_unifySize)
      {
          //unify Size logic
      }
      else if (_ignoreSize)
      {
          ProtectedNode::setContentSize(getVirtualRendererSize());
      }
      if (!_usingLayoutComponent && _running)
      {
          Widget* widgetParent = getWidgetParent();
          Size pSize;
          if (widgetParent)
          {
              pSize = widgetParent->getContentSize();
          }
          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.set(spx, spy);
      }
      onSizeChanged();
  }
  
  void Widget::setSize(const Size &size)
  {
      this->setContentSize(size);
  }
  
  void Widget::setSizePercent(const Vec2 &percent)
  {
      if (_usingLayoutComponent)
      {
          auto component = this->getOrCreateLayoutComponent();
          component->setUsingPercentContentSize(true);
          component->setPercentContentSize(percent);
          component->refreshLayout();
      }
      else
      {
          _sizePercent = percent;
          Size cSize = _customSize;
          if (_running)
          {
              Widget* widgetParent = getWidgetParent();
              if (widgetParent)
              {
                  cSize = Size(widgetParent->getContentSize().width * percent.x, widgetParent->getContentSize().height * percent.y);
              }
              else
              {
                  cSize = Size(_parent->getContentSize().width * percent.x, _parent->getContentSize().height * percent.y);
              }
          }
          if (_ignoreSize)
          {
              this->setContentSize(getVirtualRendererSize());
          }
          else
          {
              this->setContentSize(cSize);
          }
          _customSize = cSize;
      }
  }
  
  void Widget::updateSizeAndPosition()
  {
      Size pSize = _parent->getContentSize();
  
      updateSizeAndPosition(pSize);
  }
  
  void Widget::updateSizeAndPosition(const cocos2d::Size &parentSize)
  {
      switch (_sizeType)
      {
          case SizeType::ABSOLUTE:
          {
              if (_ignoreSize)
              {
                  this->setContentSize(getVirtualRendererSize());
              }
              else
              {
                  this->setContentSize(_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.set(spx, spy);
              break;
          }
          case SizeType::PERCENT:
          {
              Size cSize = Size(parentSize.width * _sizePercent.x , parentSize.height * _sizePercent.y);
              if (_ignoreSize)
              {
                  this->setContentSize(getVirtualRendererSize());
              }
              else
              {
                  this->setContentSize(cSize);
              }
              _customSize = cSize;
              break;
          }
          default:
              break;
      }
  
      //update position & position percent
      Vec2 absPos = getPosition();
      switch (_positionType)
      {
          case PositionType::ABSOLUTE:
          {
              if (parentSize.width <= 0.0f || parentSize.height <= 0.0f)
              {
                  _positionPercent.setZero();
              }
              else
              {
                  _positionPercent.set(absPos.x / parentSize.width, absPos.y / parentSize.height);
              }
              break;
          }
          case PositionType::PERCENT:
          {
              absPos.set(parentSize.width * _positionPercent.x, parentSize.height * _positionPercent.y);
              break;
          }
          default:
              break;
      }
      setPosition(absPos);
  }
  
  void Widget::setSizeType(SizeType type)
  {
      _sizeType = type;
  
      if (_usingLayoutComponent)
      {
          auto component = this->getOrCreateLayoutComponent();
  
          if (_sizeType == Widget::SizeType::PERCENT)
          {
              component->setUsingPercentContentSize(true);
          }
          else
          {
              component->setUsingPercentContentSize(false);
          }
      }
  }
  Widget::SizeType Widget::getSizeType() const
  {
      return _sizeType;
  }
  
  void Widget::ignoreContentAdaptWithSize(bool ignore)
  {
      if (_unifySize)
      {
          this->setContentSize(_customSize);
          return;
      }
      if (_ignoreSize == ignore)
      {
          return;
      }
      _ignoreSize = ignore;
      if (_ignoreSize)
      {
          Size s = getVirtualRendererSize();
          this->setContentSize(s);
      }
      else
      {
          this->setContentSize(_customSize);
      }
  }
  
  bool Widget::isIgnoreContentAdaptWithSize() const
  {
      return _ignoreSize;
  }
  
  const Size& Widget::getSize() const
  {
      return this->getContentSize();
  }
  
  const Size& Widget::getCustomSize() const
  {
      return _customSize;
  }
  
  const Vec2& Widget::getSizePercent()
  {
      if (_usingLayoutComponent)
      {
          auto component = this->getOrCreateLayoutComponent();
          _sizePercent = component->getPercentContentSize();
      }
  
      return _sizePercent;
  }
  
  Vec2 Widget::getWorldPosition()const
  {
      return convertToWorldSpace(Vec2(_anchorPoint.x * _contentSize.width, _anchorPoint.y * _contentSize.height));
  }
  
  Node* Widget::getVirtualRenderer()
  {
      return this;
  }
  
  void Widget::onSizeChanged()
  {
      if (!_usingLayoutComponent)
      {
          for (auto& child : getChildren())
          {
              Widget* widgetChild = dynamic_cast<Widget*>(child);
              if (widgetChild)
              {
                  widgetChild->updateSizeAndPosition();
              }
          }
      }
  }
  
  Size Widget::getVirtualRendererSize() const
  {
      return _contentSize;
  }
  
  void Widget::updateContentSizeWithTextureSize(const cocos2d::Size &size)
  {
      if (_unifySize)
      {
          this->setContentSize(size);
          return;
      }
      if (_ignoreSize)
      {
          this->setContentSize(size);
      }
      else
      {
          this->setContentSize(_customSize);
      }
  }
  
  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 highlight)
  {
      if (highlight == _highlight)
      {
          return;
      }
  
      _highlight = highlight;
      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()
  {
  
  }
  
  void Widget::updateChildrenDisplayedRGBA()
  {
      this->setColor(this->getColor());
      this->setOpacity(this->getOpacity());
  }
  
  
  Widget* Widget::getAncestorWidget(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->getAncestorWidget(parent->getParent());
      }
  }
  
  Widget* Widget::getAncensterWidget(Node* node)
  {
      return getAncestorWidget(node);
  }
  
  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->getAncestorWidget(this);
      if (parentWidget == nullptr)
      {
          return true;
      }
      if (parentWidget && !parentWidget->isEnabled())
      {
          return false;
      }
  
      return parentWidget->isAncestorsEnabled();
  }
  
  void Widget::setPropagateTouchEvents(bool isPropagate)
  {
      _propagateTouchEvents = isPropagate;
  }
  
  bool Widget::isPropagateTouchEvents()const
  {
      return _propagateTouchEvents;
  }
  
  void Widget::setSwallowTouches(bool swallow)
  {
      if (_touchListener)
      {
          _touchListener->setSwallowTouches(swallow);
      }
  }
  
  bool Widget::isSwallowTouches()const
  {
      if (_touchListener)
      {
          return _touchListener->isSwallowTouches();
      }
      return false;
  }
  
  bool Widget::onTouchBegan(Touch *touch, Event* unusedEvent)
  {
  	_event = unusedEvent;
  	if (this->isEatMsg(unusedEvent))
  	{
  		return true;
  	}
      _hitted = false;
      if (isVisible() && isEnabled() && isAncestorsEnabled() && isAncestorsVisible(this) )
      {
          _touchBeganPosition = touch->getLocation();
          auto camera = Camera::getVisitingCamera();
          if(hitTest(_touchBeganPosition, camera, nullptr))
          {
              if (isClippingParentContainsPoint(_touchBeganPosition)) {
                  _hittedByCamera = camera;
                  _hitted = true;
              }
          }
      }
      if (!_hitted)
      {
          return false;
      }
      setHighlighted(true);
  
      /*
       * Propagate touch events to its parents
       */
      if (_propagateTouchEvents)
      {
          this->propagateTouchEvent(TouchEventType::BEGAN, this, touch);
      }
  
      pushDownEvent();
      return true;
  }
  
  void Widget::propagateTouchEvent(cocos2d::ui::Widget::TouchEventType event, cocos2d::ui::Widget *sender, cocos2d::Touch *touch)
  {
      Widget* widgetParent = getWidgetParent();
      if (widgetParent)
      {
          widgetParent->_hittedByCamera = _hittedByCamera;
          widgetParent->interceptTouchEvent(event, sender, touch);
          widgetParent->_hittedByCamera = nullptr;
      }
  }
  
  void Widget::onTouchMoved(Touch *touch, Event* unusedEvent)
  {
  	_event = unusedEvent;
  	if (this->isEatMsg(unusedEvent))
  	{
  		return;
  	}
      _touchMovePosition = touch->getLocation();
  
      setHighlighted(hitTest(_touchMovePosition, _hittedByCamera, nullptr));
  
      /*
       * Propagate touch events to its parents
       */
      if (_propagateTouchEvents)
      {
          this->propagateTouchEvent(TouchEventType::MOVED, this, touch);
      }
  
      moveEvent();
  }
  
  void Widget::onTouchEnded(Touch *touch, Event* unusedEvent)
  {
  	_event = unusedEvent;
  	if (this->isEatMsg(unusedEvent))
  	{
  		return;
  	}
      _touchEndPosition = touch->getLocation();
  
      /*
       * Propagate touch events to its parents
       */
      if (_propagateTouchEvents)
      {
          this->propagateTouchEvent(TouchEventType::ENDED, this, touch);
      }
  
      bool highlight = _highlight;
      setHighlighted(false);
  
      if (highlight)
      {
          releaseUpEvent();
      }
      else
      {
          cancelUpEvent();
      }
  }
  
  void Widget::onTouchCancelled(Touch* touch, Event* unusedEvent)
  {
  	_event = unusedEvent;
  	if (this->isEatMsg(unusedEvent))
  	{
  		return;
  	}
      /*
       * Propagate touch events to its parents
       */
      if (_propagateTouchEvents)
      {
          this->propagateTouchEvent(TouchEventType::CANCELED, this, touch);
      }
      
      setHighlighted(false);
      cancelUpEvent();
  }
  
  void Widget::pushDownEvent()
  {
      this->retain();
      if (_touchEventCallback)
      {
          _touchEventCallback(this, TouchEventType::BEGAN);
      }
  
      if (_touchEventListener && _touchEventSelector)
      {
          (_touchEventListener->*_touchEventSelector)(this,TOUCH_EVENT_BEGAN);
      }
      this->release();
  }
  
  void Widget::moveEvent()
  {
      this->retain();
      if (_touchEventCallback)
      {
          _touchEventCallback(this, TouchEventType::MOVED);
      }
  
      if (_touchEventListener && _touchEventSelector)
      {
          (_touchEventListener->*_touchEventSelector)(this,TOUCH_EVENT_MOVED);
      }
      this->release();
  }
  
  void Widget::releaseUpEvent()
  {
      this->retain();
  
      if (isFocusEnabled())
      {
          requestFocus();
      }
  
      if (_touchEventCallback)
      {
          _touchEventCallback(this, TouchEventType::ENDED);
      }
  
      if (_touchEventListener && _touchEventSelector)
      {
          (_touchEventListener->*_touchEventSelector)(this,TOUCH_EVENT_ENDED);
      }
  
      if (_clickEventListener) {
          _clickEventListener(this);
      }
      this->release();
  }
  
  void Widget::cancelUpEvent()
  {
      this->retain();
      if (_touchEventCallback)
      {
          _touchEventCallback(this, TouchEventType::CANCELED);
      }
  
      if (_touchEventListener && _touchEventSelector)
      {
          (_touchEventListener->*_touchEventSelector)(this,TOUCH_EVENT_CANCELED);
      }
      this->release();
  }
  
  void Widget::addTouchEventListener(Ref *target, SEL_TouchEvent selector)
  {
      _touchEventListener = target;
      _touchEventSelector = selector;
  }
  
  void Widget::addTouchEventListener(const ccWidgetTouchCallback& callback)
  {
      this->_touchEventCallback = callback;
  }
  
  void Widget::addClickEventListener(const ccWidgetClickCallback &callback)
  {
      this->_clickEventListener = callback;
  }
  
  void Widget::addCCSEventListener(const ccWidgetEventCallback &callback)
  {
      this->_ccEventCallback = callback;
  }
  
  bool Widget::hitTest(const Vec2 &pt, const Camera* camera, Vec3 *p) const
  {
      Rect rect;
      rect.size = getContentSize();
      return isScreenPointInRect(pt, camera, getWorldToNodeTransform(), rect, p);
  }
  
  bool Widget::isClippingParentContainsPoint(const Vec2 &pt)
  {
      _affectByClipping = false;
      Node* parent = getParent();
      Widget* clippingParent = nullptr;
      while (parent)
      {
          Layout* layoutParent = dynamic_cast<Layout*>(parent);
          if (layoutParent)
          {
              if (layoutParent->isClippingEnabled())
              {
                  _affectByClipping = true;
                  clippingParent = layoutParent;
                  break;
              }
          }
          parent = parent->getParent();
      }
  
      if (!_affectByClipping)
      {
          return true;
      }
  
  
      if (clippingParent)
      {
          bool bRet = false;
          auto camera = Camera::getVisitingCamera();
          // Camera isn't null means in touch begin process, otherwise use _hittedByCamera instead.
          if (clippingParent->hitTest(pt, (camera ? camera : _hittedByCamera), nullptr))
          {
              bRet = true;
          }
          if (bRet)
          {
              return clippingParent->isClippingParentContainsPoint(pt);
          }
          return false;
      }
      return true;
  }
  
  void Widget::interceptTouchEvent(cocos2d::ui::Widget::TouchEventType event, cocos2d::ui::Widget *sender, Touch *touch)
  {
      Widget* widgetParent = getWidgetParent();
      if (widgetParent)
      {
          widgetParent->_hittedByCamera = _hittedByCamera;
          widgetParent->interceptTouchEvent(event,sender,touch);
          widgetParent->_hittedByCamera = nullptr;
      }
  
  }
  
  void Widget::setPosition(const Vec2 &pos)
  {
      if (!_usingLayoutComponent && _running)
      {
          Widget* widgetParent = getWidgetParent();
          if (widgetParent)
          {
              Size pSize = widgetParent->getContentSize();
              if (pSize.width <= 0.0f || pSize.height <= 0.0f)
              {
                  _positionPercent.setZero();
              }
              else
              {
                  _positionPercent.set(pos.x / pSize.width, pos.y / pSize.height);
              }
          }
      }
      ProtectedNode::setPosition(pos);
  }
  
  void Widget::setPositionPercent(const Vec2 &percent)
  {
      if (_usingLayoutComponent)
      {
          auto component = this->getOrCreateLayoutComponent();
          component->setPositionPercentX(percent.x);
          component->setPositionPercentY(percent.y);
          component->refreshLayout();
      }
      else
      {
          _positionPercent = percent;
          if (_running)
          {
              Widget* widgetParent = getWidgetParent();
              if (widgetParent)
              {
                  Size parentSize = widgetParent->getContentSize();
                  Vec2 absPos(parentSize.width * _positionPercent.x, parentSize.height * _positionPercent.y);
                  setPosition(absPos);
              }
          }
      }
  }
  
  const Vec2& Widget::getPositionPercent(){
  
      if (_usingLayoutComponent)
      {
          auto component = this->getOrCreateLayoutComponent();
          float percentX = component->getPositionPercentX();
          float percentY = component->getPositionPercentY();
  
          _positionPercent.set(percentX, percentY);
      }
      return _positionPercent;
  }
  
  void Widget::setPositionType(PositionType type)
  {
      _positionType = type;
  
      if (_usingLayoutComponent)
      {
          auto component = this->getOrCreateLayoutComponent();
          if (type == Widget::PositionType::ABSOLUTE)
          {
              component->setPositionPercentXEnabled(false);
              component->setPositionPercentYEnabled(false);
          }
          else
          {
              component->setPositionPercentXEnabled(true);
              component->setPositionPercentYEnabled(true);
          }
      }
  }
  
  Widget::PositionType Widget::getPositionType() const
  {
      return _positionType;
  }
  
  bool Widget::isBright() const
  {
      return _bright;
  }
  
  bool Widget::isEnabled() const
  {
      return _enabled;
  }
  
  float Widget::getLeftBoundary() const
  {
      return getBoundingBox().origin.x;
  }
  
  float Widget::getBottomBoundary() const
  {
      return getBoundingBox().origin.y;
  }
  
  float Widget::getRightBoundary() const
  {
      return getLeftBoundary() + getBoundingBox().size.width;
  }
  
  float Widget::getTopBoundary() const
  {
      return getBottomBoundary() + getBoundingBox().size.height;
  }
  
  const Vec2& Widget::getTouchBeganPosition()const
  {
      return _touchBeganPosition;
  }
  
  const Vec2& Widget::getTouchMovePosition()const
  {
      return _touchMovePosition;
  }
  
  const Vec2& Widget::getTouchEndPosition()const
  {
      return _touchEndPosition;
  }
  
  void Widget::setLayoutParameter(LayoutParameter *parameter)
  {
      if (!parameter)
      {
          return;
      }
      _layoutParameterDictionary.insert((int)parameter->getLayoutType(), parameter);
      _layoutParameterType = parameter->getLayoutType();
  }
  
  LayoutParameter* Widget::getLayoutParameter()const
  {
      return dynamic_cast<LayoutParameter*>(_layoutParameterDictionary.at((int)_layoutParameterType));
  }
  
  LayoutParameter* Widget::getLayoutParameter(LayoutParameter::Type type)
  {
      return dynamic_cast<LayoutParameter*>(_layoutParameterDictionary.at((int)type));
  }
  
  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());
          }
      }
  }
  
  GLProgramState* Widget::getNormalGLProgramState(Texture2D* texture)const
  {
      return GLProgramState::getOrCreateWithGLProgramName(GLProgram::SHADER_NAME_POSITION_TEXTURE_COLOR_NO_MVP, texture);
  }
  
  GLProgramState* Widget::getGrayGLProgramState(Texture2D* texture)const
  {
      return GLProgramState::getOrCreateWithGLProgramName(GLProgram::SHADER_NAME_POSITION_GRAYSCALE, texture);
  }
  
  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;
      this->setContentSize(widget->_contentSize);
      _customSize = widget->_customSize;
      _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());
      setCascadeColorEnabled(widget->isCascadeColorEnabled());
      setCascadeOpacityEnabled(widget->isCascadeOpacityEnabled());
      _touchEventCallback = widget->_touchEventCallback;
      _touchEventListener = widget->_touchEventListener;
      _touchEventSelector = widget->_touchEventSelector;
      _clickEventListener = widget->_clickEventListener;
      _focused = widget->_focused;
      _focusEnabled = widget->_focusEnabled;
      _propagateTouchEvents = widget->_propagateTouchEvents;
  
      copySpecialProperties(widget);
  
      Map<int, LayoutParameter*>& layoutParameterDic = widget->_layoutParameterDictionary;
      for (auto& iter : layoutParameterDic)
      {
          setLayoutParameter(iter.second->clone());
      }
  }
  
      void Widget::setFlippedX(bool flippedX)
      {
  
          float realScale = this->getScaleX();
          _flippedX = flippedX;
          this->setScaleX(realScale);
      }
  
      void Widget::setFlippedY(bool flippedY)
      {
          float realScale = this->getScaleY();
          _flippedY = flippedY;
          this->setScaleY(realScale);
      }
  
  
  
      void Widget::setScaleX(float scaleX)
      {
          if (_flippedX) {
              scaleX = scaleX * -1;
          }
          Node::setScaleX(scaleX);
      }
  
      void Widget::setScaleY(float scaleY)
      {
          if (_flippedY) {
              scaleY = scaleY * -1;
          }
          Node::setScaleY(scaleY);
      }
  
      void Widget::setScale(float scale)
      {
          this->setScaleX(scale);
          this->setScaleY(scale);
          this->setScaleZ(scale);
      }
  
      void Widget::setScale(float scaleX, float scaleY)
      {
          this->setScaleX(scaleX);
          this->setScaleY(scaleY);
      }
  
      float Widget::getScaleX()const
      {
          float originalScale = Node::getScaleX();
          if (_flippedX)
          {
              originalScale = originalScale * -1.0f;
          }
          return originalScale;
      }
  
      float Widget::getScaleY()const
      {
          float originalScale = Node::getScaleY();
          if (_flippedY)
          {
              originalScale = originalScale * -1.0f;
          }
          return originalScale;
      }
  
      float Widget::getScale()const
      {
          CCASSERT(this->getScaleX() == this->getScaleY(), "scaleX should be equal to scaleY.");
          return this->getScaleX();
      }
  
  
  /*temp action*/
  void Widget::setActionTag(int tag)
  {
  	_actionTag = tag;
  }
  
  int Widget::getActionTag()const
  {
  	return _actionTag;
  }
  
  void Widget::setFocused(bool focus)
  {
      _focused = focus;
  
      //make sure there is only one focusedWidget
      if (focus) {
          _focusedWidget = this;
          if (_focusNavigationController) {
              _focusNavigationController->setFirstFocusedWidget(this);
          }
      }
  
  }
  
  bool Widget::isFocused()const
  {
      return _focused;
  }
  
  void Widget::setFocusEnabled(bool enable)
  {
      _focusEnabled = enable;
  }
  
  bool Widget::isFocusEnabled()const
  {
      return _focusEnabled;
  }
  
  Widget* Widget::findNextFocusedWidget(FocusDirection direction,  Widget* current)
  {
      if (nullptr == onNextFocusedWidget || nullptr == onNextFocusedWidget(direction) ) {
          if (this->isFocused() || dynamic_cast<Layout*>(current))
          {
              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*/){
      return getCurrentFocusedWidget();
  }
  
  Widget* Widget::getCurrentFocusedWidget()
  {
      return _focusedWidget;
  }
  
  void Widget::enableDpadNavigation(bool enable)
  {
      if (enable)
      {
          if (nullptr == _focusNavigationController)
          {
              _focusNavigationController = new (std::nothrow) FocusNavigationController;
              if (_focusedWidget)
              {
                  _focusNavigationController->setFirstFocusedWidget(_focusedWidget);
              }
          }
      }
      else
      {
          CC_SAFE_DELETE(_focusNavigationController);
      }
  
      if (nullptr != _focusNavigationController)
      {
          _focusNavigationController->enableFocusNavigation(enable);
      }
  }
  
  
  bool Widget::isUnifySizeEnabled()const
  {
      return _unifySize;
  }
  
  void Widget::setUnifySizeEnabled(bool enable)
  {
      _unifySize = enable;
  }
  
  
  void Widget::setLayoutComponentEnabled(bool enable)
  {
      _usingLayoutComponent = enable;
  }
  
  bool Widget::isLayoutComponentEnabled()const
  {
      return _usingLayoutComponent;
  }
  
  bool Widget::isEatMsg(Event* _event)
  {
  	bool ret = false;
  	if (_cancelEatMsg&&_event->getEventData() != nullptr)
  	{
  		std::string str((char*)_event->getEventData());
  		if (str.compare("eatme") == 0)
  		{
  			ret = true;
  		}
  		else
  		{
  			ret = false;
  		}
  	}
  	else
  	{
  		ret = false;
  	}
  	return ret;
  }
  
  
  }
  NS_CC_END
  