RedCore/cocos2d/cocos/2d/CCMenu.h

/****************************************************************************
Copyright (c) 2008-2010 Ricardo Quesada
Copyright (c) 2010-2012 cocos2d-x.org
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 above copyright notice and this permission notice shall be included in
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****************************************************************************/
#ifndef __CCMENU_H_
#define __CCMENU_H_

#include "2d/CCMenuItem.h"
#include "2d/CCLayer.h"
#include "base/CCValue.h"

NS_CC_BEGIN
class Touch;

/**
 * @addtogroup _2d
 * @{
 */



/** @brief A Menu for touch handling.
* 
* Features and Limitation:
*  - You can add MenuItem objects in runtime using addChild.
*  - But the only accepted children are MenuItem objects.
*/
class CC_DLL Menu : public Layer
{
public:
    /**
     * Menu state, it's used internally.
     */
    enum class State
    {
        WAITING,
        TRACKING_TOUCH,
    };
    
    /**
     *@brief Creates an empty Menu.
     */
    static Menu* create();
    
#if (CC_TARGET_PLATFORM == CC_PLATFORM_WINRT)
    // VS2013 does not support nullptr in variable args lists and variadic templates are also not supported.
    typedef MenuItem* M;
    static Menu* create(M m1, std::nullptr_t listEnd) { return variadicCreate(m1, NULL); }
    static Menu* create(M m1, M m2, std::nullptr_t listEnd) { return variadicCreate(m1, m2, NULL); }
    static Menu* create(M m1, M m2, M m3, std::nullptr_t listEnd) { return variadicCreate(m1, m2, m3, NULL); }
    static Menu* create(M m1, M m2, M m3, M m4, std::nullptr_t listEnd) { return variadicCreate(m1, m2, m3, m4, NULL); }
    static Menu* create(M m1, M m2, M m3, M m4, M m5, std::nullptr_t listEnd) { return variadicCreate(m1, m2, m3, m4, m5, NULL); }
    static Menu* create(M m1, M m2, M m3, M m4, M m5, M m6, std::nullptr_t listEnd) { return variadicCreate(m1, m2, m3, m4, m5, m6, NULL); }
    static Menu* create(M m1, M m2, M m3, M m4, M m5, M m6, M m7, std::nullptr_t listEnd) { return variadicCreate(m1, m2, m3, m4, m5, m6, m7, NULL); }
    static Menu* create(M m1, M m2, M m3, M m4, M m5, M m6, M m7, M m8, std::nullptr_t listEnd) { return variadicCreate(m1, m2, m3, m4, m5, m6, m7, m8, NULL); }
    static Menu* create(M m1, M m2, M m3, M m4, M m5, M m6, M m7, M m8, M m9, std::nullptr_t listEnd) { return variadicCreate(m1, m2, m3, m4, m5, m6, m7, m8, m9, NULL); }
    static Menu* create(M m1, M m2, M m3, M m4, M m5, M m6, M m7, M m8, M m9, M m10, std::nullptr_t listEnd) { return variadicCreate(m1, m2, m3, m4, m5, m6, m7, m8, m9, m10,  NULL); }

    // On WP8 for lists longer than 10 items, use createWithArray or variadicCreate with NULL as the last argument.
    static Menu* variadicCreate(MenuItem* item, ...);
#else
    /** Creates a Menu with MenuItem objects. */
    static Menu* create(MenuItem* item, ...) CC_REQUIRES_NULL_TERMINATION;
#endif

    /** 
     * Creates a Menu with a Array of MenuItem objects.
     * @js NA
     */
    static Menu* createWithArray(const Vector<MenuItem*>& arrayOfItems);

    /**
     * Creates a Menu with it's item, then use addChild() to add 
     * other items. It is used for script, it can't be initialized with undetermined
     * number of variables.
     * @js NA
     */
    static Menu* createWithItem(MenuItem* item);
    
    /** Creates a Menu with MenuItem objects.
     * @js NA
     */
    static Menu* createWithItems(MenuItem *firstItem, va_list args);

    /** Align items vertically. */
    void alignItemsVertically();

    /** Align items vertically with padding.
    @since v0.7.2
    */
    void alignItemsVerticallyWithPadding(float padding);

    /** Align items horizontally. */
    void alignItemsHorizontally();
    
    /** Align items horizontally with padding.
    @since v0.7.2
    */
    void alignItemsHorizontallyWithPadding(float padding);

    /** Align items in rows of columns. */
    void alignItemsInColumns(int columns, ...) CC_REQUIRES_NULL_TERMINATION;
    
    /** Align items in rows of columns. */
    void alignItemsInColumns(int columns, va_list args);
    
    /** Align items in array of columns.
     * @js NA
     */
    void alignItemsInColumnsWithArray(const ValueVector& rows);

    /** Align items in columns of rows. */
    void alignItemsInRows(int rows, ...) CC_REQUIRES_NULL_TERMINATION;
    
    /** Align items in columns of rows. */
    void alignItemsInRows(int rows, va_list args);
    
    /** Align items in array of rows.
     * @js NA
     */
    void alignItemsInRowsWithArray(const ValueVector& columns);

    /**
     * Determines if the menu is enabled.
     * @see `setEnabled(bool)`.
     * @return whether the menu is enabled or not.
     */
    virtual bool isEnabled() const { return _enabled; }

    /**
     * Set whether the menu is visible. If set false, interacting with the menu
     * will have no effect.
     * The default value is true, a menu is default to visible.
     *@param value true if menu is to be enabled, false if menu is to be disabled.
     */
    virtual void setEnabled(bool value) { _enabled = value; };

    virtual bool onTouchBegan(Touch* touch, Event* event) override;
    virtual void onTouchEnded(Touch* touch, Event* event) override;
    virtual void onTouchCancelled(Touch* touch, Event* event) override;
    virtual void onTouchMoved(Touch* touch, Event* event) override;
    
    // overrides
    virtual void removeChild(Node* child, bool cleanup) override;
    
    virtual void addChild(Node * child) override;
    virtual void addChild(Node * child, int zOrder) override;
    virtual void addChild(Node * child, int zOrder, int tag) override;
    virtual void addChild(Node * child, int zOrder, const std::string &name) override;
    
    virtual void onEnter() override;
    virtual void onExit() override;
    virtual void setOpacityModifyRGB(bool value) override;
    virtual bool isOpacityModifyRGB(void) const override;

    virtual std::string getDescription() const override;

CC_CONSTRUCTOR_ACCESS:
    /**
     * @js ctor
     */
    Menu() : _selectedItem(nullptr), _selectedWithCamera(nullptr) {}
    virtual ~Menu();

    /** initializes an empty Menu */
    bool init() override;

    /** initializes a Menu with a NSArray of MenuItem objects */
    bool initWithArray(const Vector<MenuItem*>& arrayOfItems);

protected:



    /** whether or not the menu will receive events */
    bool _enabled;

    virtual MenuItem* getItemForTouch(Touch * touch, const Camera *camera);
    State _state;
    MenuItem *_selectedItem;
    const Camera *_selectedWithCamera;
private:
    CC_DISALLOW_COPY_AND_ASSIGN(Menu);
};

// end of _2d group
/// @}

NS_CC_END

#endif//__CCMENU_H_