/////cocos2d-x-3.0alpha0/extensions/CocoStudio/GUI/UIWidgets/ScrollWidget
//这是一个列表视图，它 定义了 view 列表方向、 view 列表滚动方向、view 列表事件类型 ，提供了一些常用方法


#ifndef __UILISTVIEW_H__
#define __UILISTVIEW_H__

/* gui mark */
#include "../../Layouts/Layout.h"
/**/

NS_CC_EXT_BEGIN

/**
 *  list view direction                     //view 列表方向
 */
typedef enum LISTVIEW_DIR
{
    LISTVIEW_DIR_NONE,
    LISTVIEW_DIR_VERTICAL,
    LISTVIEW_DIR_HORIZONTAL
}ListViewDirection;

/**
 *  list view scroll direction                 // view 列表滚动方向
 */
typedef enum LISTVIEW_MOVE_DIR
{
    LISTVIEW_MOVE_DIR_NONE,
    LISTVIEW_MOVE_DIR_UP,
    LISTVIEW_MOVE_DIR_DOWN,
    LISTVIEW_MOVE_DIR_LEFT,
    LISTVIEW_MOVE_DIR_RIGHT,
}ListViewMoveDirection;
//view 列表事件类型
typedef enum
{
    LISTVIEW_EVENT_INIT_CHILD,
    LISTVIEW_EVENT_UPDATE_CHILD,
}ListViewEventType;

/**
 *  list view event         view 列表事件
 */
typedef void (Object::*SEL_ListViewEvent)(Object*, ListViewEventType);
#define listvieweventselector(_SELECTOR)(SEL_ListViewEvent)(&_SELECTOR)

class UIListView : public Layout
{
public:
    UIListView();
    virtual ~UIListView();
    static UIListView* create();
    
    /**
     *  add widget child override               //添加 Widget child 重写
     */
    virtual bool addChild(UIWidget* widget);
    /**
     *  remove all widget children override       //  移除所有 widget chld 重写
     */
    virtual void removeAllChildren();
    /**
     *  remove widget child override        //  移除 widget chld 重写
     */
    virtual bool removeChild(UIWidget* child);
    
    virtual bool onTouchBegan(const Point &touchPoint);
    virtual void onTouchMoved(const Point &touchPoint);
    virtual void onTouchEnded(const Point &touchPoint);
    virtual void onTouchCancelled(const Point &touchPoint);
    virtual void onTouchLongClicked(const Point &touchPoint);
    
    /**
     *  set and get direction               //设置方向
     */
    void setDirection(ListViewDirection dir);
    ListViewDirection getDirection();
    
    /**
     *  initialze data length
     *  and create children with parameter length                   //使用 length 参数创建 children
     */
    void initChildWithDataLength(int length);
    /**
     *  get data length             //获取数据长度
     */
    int getDataLength();
    
    /**
     *  update child function whetn trigger update child event      //触发更新 child 事件后更新 child 函数
     */
    /**
     *  get update widget child             //获取 widget child更新
     */
    UIWidget* getUpdateChild();
    /**
     *  get update data index               //设置更新数据索引
     */
    int getUpdateDataIndex();
    /**
     *  get and set update success or not                           //获取/设置是否更新成功
     */
    bool getUpdateSuccess();
    void setUpdateSuccess(bool sucess);
    
    /**
     *  add event call-back function                    //添加回调函数事件
     */
    /**
     *  add event
     */
    void addEventListenter(cocos2d::Object* target, SEL_ListViewEvent selector);
    
    /* gui mark */
    /**
     *  get and set degree range for checking move or not with scrolling        //设置范围（度）来检查移动、滑动
     */
    /**/
    virtual void update(float dt);
    
    /**
     * Returns the "class name" of widget.          //返回 widget 的名字
     */
    virtual const char* getDescription() const;
protected:
    virtual bool init();
    
    virtual void onSizeChanged();
    
    void setMoveDirection(ListViewMoveDirection dir);
    ListViewMoveDirection getMoveDirection();
    
    virtual void resetProperty();
    
    virtual void handlePressLogic(const Point &touchPoint);
    virtual void handleMoveLogic(const Point &touchPoint);
    virtual void handleReleaseLogic(const Point &touchPoint);
    virtual void interceptTouchEvent(int handleState,UIWidget* sender,const Point &touchPoint);
    /* gui mark */                      //标志
    //    virtual bool isInScrollDegreeRange(UIWidget* widget);
    /**/
    virtual void checkChildInfo(int handleState,UIWidget* sender,const Point &touchPoint);
    
    void moveChildren(float offset);
    virtual bool scrollChildren(float touchOffset);
    void autoScrollChildren(float dt);
    float getCurAutoScrollDistance(float time);
    void startAutoScrollChildren(float v);
    void stopAutoScrollChildren();
    void recordSlidTime(float dt);
    void startRecordSlidAction();
    virtual void endRecordSlidAction();
    
    UIWidget* getCheckPositionChild();
    UIWidget* getChildFromUpdatePool();
    void pushChildToPool();
    void getAndCallback();
    
    void setUpdateChild(UIWidget* child);
    void setUpdateDataIndex(int index);
    void clearCollectOverArray();
    void collectOverTopChild();
    void collectOverBottomChild();
    void collectOverLeftChild();
    void collectOverRightChild();
    void setLoopPosition();
    void updateChild();
    
    void initChildEvent();
    void updateChildEvent();
    
    virtual void setClippingEnabled(bool able){Layout::setClippingEnabled(able);};
protected:
    ListViewDirection _direction;
    ListViewMoveDirection _moveDirection;
    
    float _touchStartLocation;
    float _touchEndLocation;
    float _touchMoveStartLocation;
    float _topBoundary;//test
    float _bottomBoundary;//test
    float _leftBoundary;
    float _rightBoundary;
    
    bool _autoScroll;
    
    float _autoScrollOriginalSpeed;
    float _autoScrollAcceleration;
    
    bool _bePressed;
    float _slidTime;
    Point _moveChildPoint;
    float _childFocusCancelOffset;
    
    Object* _eventListener;
    SEL_ListViewEvent _eventSelector;
    
    Array* _childPool;
    Array* _updatePool;
    
    int _dataLength;
    int _begin;
    int _end;
    UIWidget* _updateChild;
    int _updateDataIndex;
    bool _updateSuccess;
    
    Array* _overTopArray;
    Array* _overBottomArray;
    Array* _overLeftArray;
    Array* _overRightArray;
    
    float _disBoundaryToChild_0;
    float _disBetweenChild;
    
    /* gui mark */                      //标志
    float _scrollDegreeRange;
    /**/
};

NS_CC_EXT_END


#endif /* defined(__Test__UIListView__) */