axmol/cocos/ui/UIScale9Sprite.h

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 Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
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#ifndef __cocos2d_libs__UIScale9Sprite__
#define __cocos2d_libs__UIScale9Sprite__

#include "2d/CCSprite.h"
#include "2d/CCSpriteFrame.h"
#include "2d/CCSpriteBatchNode.h"
#include "platform/CCPlatformMacros.h"
#include "ui/GUIExport.h"
#include "renderer/CCTrianglesCommand.h"

/**
 * @addtogroup ui
 * @{
 */
NS_CC_BEGIN
class DrawNode;
class Texture2D;

namespace ui
{

/**
 *@brief A 9-slice sprite for cocos2d-x.
 *
 * 9-slice scaling allows you to specify how scaling is applied
 * to specific areas of a sprite. With 9-slice scaling (3x3 grid),
 * you can ensure that the sprite does not become distorted when
 * scaled.
 * Note: When you set _scale9Enabled to false,
 * then you could call `scale9Sprite->getSprite()` to return the inner Sprite pointer.
 * Then you could call any methods of Sprite class with the return pointers.
 *
 */
class CC_GUI_DLL Scale9Sprite : public Sprite
{
public:
    /**
     * Default constructor.
     * @js ctor
     * @lua new
     */
    Scale9Sprite();

    /**
     * Default destructor.
     * @js NA
     * @lua NA
     */
    virtual ~Scale9Sprite();

    /**
     * Builtin shader state.
     * Currently support Normal and Gray state.
     */
    enum class State
    {
        NORMAL,
        GRAY
    };

    enum class RenderingType
    {
        SIMPLE,
        SLICE
    };

public:
    /**
     * @brief Create an empty Scale9Sprite.
     *
     * @return A Scale9Sprite instance.
     */
    static Scale9Sprite* create();

    /**
     * Creates a 9-slice sprite with a texture file, a delimitation zone and
     * with the specified cap insets.
     *
     * @see initWithFile(const char *file, const Rect& rect, const Rect& capInsets)
     * @param file A texture file name.
     * @param rect A delimitation zone.
     * @param capInsets A specified cap insets.
     * @return A Scale9Sprite instance.
     */
    static Scale9Sprite* create(std::string_view file, const Rect& rect, const Rect& capInsets);

    /**
     * Creates a 9-slice sprite with a texture file. The whole texture will be
     * broken down into a 3×3 grid of equal blocks.
     *
     * @see initWithFile(const Rect& capInsets, const char *file)
     * @param capInsets A specified cap insets.
     * @param file A texture file name.
     * @return A Scale9Sprite instance.
     */
    static Scale9Sprite* create(const Rect& capInsets, std::string_view file);

    /**
     * Creates a 9-slice sprite with a texture file and a delimitation zone. The
     * texture will be broken down into a 3×3 grid of equal blocks.
     *
     * @see initWithFile(const char *file, const Rect& rect)
     * @param file A texture file name.
     * @param rect A delimitation zone.
     * @return A Scale9Sprite instance.
     */
    static Scale9Sprite* create(std::string_view file, const Rect& rect);

    /**
     * Creates a 9-slice sprite with a texture file. The whole texture will be
     * broken down into a 3×3 grid of equal blocks.
     *
     * @see initWithFile(const char *file)
     * @param file A texture file name.
     * @return A Scale9Sprite instance.
     */
    static Scale9Sprite* create(std::string_view file);

    /**
     * Creates a 9-slice sprite with an sprite frame.
     * Once the sprite is created, you can then call its "setContentSize:" method
     * to resize the sprite will all it's 9-slice goodness interact.
     * It respects the anchorPoint too.
     *
     * @see initWithSpriteFrame(SpriteFrame *spriteFrame)
     * @param spriteFrame  A sprite frame pointer.
     * @return A Scale9Sprite instance.
     */
    static Scale9Sprite* createWithSpriteFrame(SpriteFrame* spriteFrame);

    /**
     * Creates a 9-slice sprite with an sprite frame and the centre of its zone.
     * Once the sprite is created, you can then call its "setContentSize:" method
     * to resize the sprite will all it's 9-slice goodness interact.
     * It respects the anchorPoint too.
     *
     * @see initWithSpriteFrame(SpriteFrame *spriteFrame, const Rect& capInsets)
     * @param spriteFrame A sprite frame pointer.
     * @param capInsets  A delimitation zone.
     * @return A Scale9Sprite instance.
     */
    static Scale9Sprite* createWithSpriteFrame(SpriteFrame* spriteFrame, const Rect& capInsets);

    /**
     * Creates a 9-slice sprite with an sprite frame name.
     * Once the sprite is created, you can then call its "setContentSize:" method
     * to resize the sprite will all it's 9-slice goodness interact.
     * It respects the anchorPoint too.
     *
     * @see initWithSpriteFrameName(const char *spriteFrameName)
     * @param spriteFrameName A sprite frame name.
     * @return A Scale9Sprite instance.
     */
    static Scale9Sprite* createWithSpriteFrameName(std::string_view spriteFrameName);

    /**
     * Creates a 9-slice sprite with an sprite frame name and the centre of its zone.
     * Once the sprite is created, you can then call its "setContentSize:" method
     * to resize the sprite will all it's 9-slice goodness interact.
     * It respects the anchorPoint too.
     *
     * @see initWithSpriteFrameName(const char *spriteFrameName, const Rect& capInsets)
     * @param spriteFrameName A sprite frame name.
     * @param capInsets A delimitation zone.
     * @return A Scale9Sprite instance.
     */
    static Scale9Sprite* createWithSpriteFrameName(std::string_view spriteFrameName, const Rect& capInsets);

    // overridden methods that takes different parameters
    using Sprite::initWithFile;
    using Sprite::initWithSpriteFrame;
    using Sprite::initWithSpriteFrameName;
    using Sprite::setSpriteFrame;

    /**
     * Initializes a 9-slice sprite with a texture file, a delimitation zone and
     * with the specified cap insets.
     * Once the sprite is created, you can then call its "setContentSize:" method
     * to resize the sprite will all it's 9-slice goodness interact.
     * It respects the anchorPoint too.
     *
     * @param file The name of the texture file.
     * @param rect The rectangle that describes the sub-part of the texture that
     * is the whole image. If the shape is the whole texture, set this to the
     * texture's full rect.
     * @param capInsets The values to use for the cap insets.
     * @return True if initialize success, false otherwise.
     */
    virtual bool initWithFile(std::string_view file, const Rect& rect, const Rect& capInsets);

    /**
     * Initializes a 9-slice sprite with a texture file and with the specified cap
     * insets.
     * Once the sprite is created, you can then call its "setContentSize:" method
     * to resize the sprite will all it's 9-slice goodness interact.
     * It respects the anchorPoint too.
     *
     * @param file The name of the texture file.
     * @param capInsets The values to use for the cap insets.
     * @return True if initializes success, false otherwise.
     */
    virtual bool initWithFile(const Rect& capInsets, std::string_view file);

    /**
     * Initializes a 9-slice sprite with an sprite frame and with the specified
     * cap insets.
     * Once the sprite is created, you can then call its "setContentSize:" method
     * to resize the sprite will all it's 9-slice goodness interact.
     * It respects the anchorPoint too.
     *
     * @param spriteFrame The sprite frame object.
     * @param capInsets The values to use for the cap insets.
     * @return True if initializes success, false otherwise.
     */
    virtual bool initWithSpriteFrame(SpriteFrame* spriteFrame, const Rect& capInsets);

    /**
     * Initializes a 9-slice sprite with an sprite frame name and with the specified
     * cap insets.
     * Once the sprite is created, you can then call its "setContentSize:" method
     * to resize the sprite will all it's 9-slice goodness interact.
     * It respects the anchorPoint too.
     *
     * @param spriteFrameName The sprite frame name.
     * @param capInsets The values to use for the cap insets.
     * @return True if initializes success, false otherwise.
     */
    virtual bool initWithSpriteFrameName(std::string_view spriteFrameName, const Rect& capInsets);

    // override function

    /**
     * Initializes a 9-slice sprite with a texture file and a delimitation zone. The
     * texture will be broken down into a 3×3 grid of equal blocks.
     * Once the sprite is created, you can then call its "setContentSize:" method
     * to resize the sprite will all it's 9-slice goodness interact.
     * It respects the anchorPoint too.
     *
     * @param file The name of the texture file.
     * @param rect The rectangle that describes the sub-part of the texture that
     * is the whole image. If the shape is the whole texture, set this to the
     * texture's full rect.
     * @return True if initializes success, false otherwise.
     */
    virtual bool initWithFile(std::string_view file, const Rect& rect) override;

    /**
     * Initializes a 9-slice sprite with a texture file. The whole texture will be
     * broken down into a 3×3 grid of equal blocks.
     * Once the sprite is created, you can then call its "setContentSize:" method
     * to resize the sprite will all it's 9-slice goodness interact.
     * It respects the anchorPoint too.
     *
     * @param file The name of the texture file.
     * @return True if initializes success, false otherwise.
     */
    virtual bool initWithFile(std::string_view file) override;

    /**
     * Initializes a 9-slice sprite with an sprite frame name.
     * Once the sprite is created, you can then call its "setContentSize:" method
     * to resize the sprite will all it's 9-slice goodness interact.
     * It respects the anchorPoint too.
     *
     * @param spriteFrameName The sprite frame name.
     * @return True if initializes success, false otherwise.
     */
    virtual bool initWithSpriteFrameName(std::string_view spriteFrameName) override;

    virtual bool init() override;

    /**
     * @brief Initializes a 9-slice sprite with an sprite instance.
     * Once the sprite is created, you can then call its "setContentSize:" method
     * to resize the sprite will all it's 9-slice goodness interact.
     * It respects the anchorPoint too.
     *
     * @param sprite The sprite instance.
     * @param rect A delimitation zone.
     * @param rotated Whether the sprite is rotated or not.
     * @param capInsets The values to use for the cap insets.
     * @return True if initializes success, false otherwise.
     */
    virtual bool init(Sprite* sprite, const Rect& rect, bool rotated, const Rect& capInsets);

    /**
     * @brief Initializes a 9-slice sprite with an sprite instance.
     * Once the sprite is created, you can then call its "setContentSize:" method
     * to resize the sprite will all it's 9-slice goodness interact.
     * It respects the anchorPoint too.
     *
     * @param sprite The sprite instance.
     * @param rect A delimitation zone.
     * @param capInsets The values to use for the cap insets.
     * @return True if initializes success, false otherwise.
     */
    virtual bool init(Sprite* sprite, const Rect& rect, const Rect& capInsets);

    /**
     * @brief Initializes a 9-slice sprite with an sprite instance.
     * Once the sprite is created, you can then call its "setContentSize:" method
     * to resize the sprite will all it's 9-slice goodness interact.
     * It respects the anchorPoint too.
     *
     * @param sprite The sprite instance.
     * @param rect A delimitation zone.
     * @param rotated Whether the sprite is rotated or not.
     * @param offset The offset when slice the sprite.
     * @param originalSize The original size of sprite.
     * @param capInsets The values to use for the cap insets.
     * @return True if initializes success, false otherwise.
     */
    virtual bool init(Sprite* sprite,
                      const Rect& rect,
                      bool rotated,
                      const Vec2& offset,
                      const Vec2& originalSize,
                      const Rect& capInsets);

    /**
     * Creates and returns a new sprite object with the specified cap insets.
     * You use this method to add cap insets to a sprite or to change the existing
     * cap insets of a sprite. In both cases, you get back a new image and the
     * original sprite remains untouched.
     *
     * @param capInsets The values to use for the cap insets.
     * @return A Scale9Sprite instance.
     */
    Scale9Sprite* resizableSpriteWithCapInsets(const Rect& capInsets) const;

    /**
     * @brief Update Scale9Sprite with a specified sprite.
     *
     * @param sprite A sprite pointer.
     * @param rect A delimitation zone.
     * @param rotated Whether the sprite is rotated or not.
     * @param capInsets The Values to use for the cap insets.
     * @return True if update success, false otherwise.
     * @js NA
     */
    virtual bool updateWithSprite(Sprite* sprite, const Rect& rect, bool rotated, const Rect& capInsets);

    /**
     * @brief Update Scale9Sprite with a specified sprite.
     *
     * @param sprite A sprite pointer.
     * @param rect A delimitation zone.
     * @param rotated Whether the sprite is rotated or not.
     * @param offset The offset when slice the sprite.
     * @param originalSize The original size of the sprite.
     * @param capInsets The Values to use for the cap insets.
     * @return True if update success, false otherwise.
     * @js NA
     */
    virtual bool updateWithSprite(Sprite* sprite,
                                  const Rect& rect,
                                  bool rotated,
                                  const Vec2& offset,
                                  const Vec2& originalSize,
                                  const Rect& capInsets);

    /**
     * @brief Change inner sprite's sprite frame.
     *
     * @param spriteFrame A sprite frame pointer.
     * @param capInsets The values to use for the cap insets.
     */
    virtual void setSpriteFrame(SpriteFrame* spriteFrame, const Rect& capInsets);

    /**
     * Change the state of 9-slice sprite.
     * @see `State`
     * @param state A enum value in State.
     * @since v3.4
     */
    void setState(State state);

    /**
     * Query the current bright state.
     * @return @see `State`
     * @since v3.7
     */
    State getState() const;

    /**
     * @brief Query the sprite's original size.
     *
     * @return Sprite size.
     */
    Vec2 getOriginalSize() const;

    /**
     * @brief Change the preferred size of Scale9Sprite.
     *
     * @param size A delimitation zone.
     */
    void setPreferredSize(const Vec2& size);

    /**
     * @brief Query the Scale9Sprite's preferred size.
     *
     * @return Scale9Sprite's preferred size.
     */
    Vec2 getPreferredSize() const;

    /**
     * @brief Change the left sprite's cap inset.
     *
     * @param leftInset The values to use for the cap inset.
     */
    void setInsetLeft(float leftInset);

    /**
     * @brief Query the left sprite's cap inset.
     *
     * @return The left sprite's cap inset.
     */
    float getInsetLeft() const;

    /**
     * @brief Change the top sprite's cap inset.
     *
     * @param topInset The values to use for the cap inset.
     */
    void setInsetTop(float topInset);

    /**
     * @brief Query the top sprite's cap inset.
     *
     * @return The top sprite's cap inset.
     */
    float getInsetTop() const;

    /**
     * @brief Change the right sprite's cap inset.
     *
     * @param rightInset The values to use for the cap inset.
     */
    void setInsetRight(float rightInset);

    /**
     * @brief Query the right sprite's cap inset.
     *
     * @return The right sprite's cap inset.
     */
    float getInsetRight() const;

    /**
     * @brief Change the bottom sprite's cap inset.
     *
     * @param bottomInset The values to use for the cap inset.

     */
    void setInsetBottom(float bottomInset);

    /**
     * @brief Query the bottom sprite's cap inset.
     *
     * @return The bottom sprite's cap inset.
     */
    float getInsetBottom() const;

    /**
     * @brief Toggle 9-slice feature.
     * If Scale9Sprite is 9-slice disabled, the Scale9Sprite will rendered as a normal sprite.
     * @warning: Don't use setScale9Enabled(false), use setRenderingType(RenderingType::SIMPLE) instead.
     *        The setScale9Enabled(false) is kept only for back back compatibility.
     * @param enabled True to enable 9-slice, false otherwise.
     * @js NA
     */
    void setScale9Enabled(bool enabled);

    /**
     * @brief Query whether the Scale9Sprite is enable 9-slice or not.
     *
     * @return True if 9-slice is enabled, false otherwise.
     * @js NA
     */
    bool isScale9Enabled() const;

    /// @} end of Children and Parent

    /**
     * @brief Get the original no 9-sliced sprite
     *
     * @return A sprite instance.
     */
    Sprite* getSprite();

    /**
     * @brief copies self to copy
     */
    void copyTo(Scale9Sprite* copy) const;

    /**
     * Set the slice sprite rendering type.
     * When setting to SIMPLE, only 4 vertexes is used to rendering.
     * otherwise 16 vertexes will be used to rendering.
     * @see RenderingType
     */
    void setRenderingType(RenderingType type);

    /**
     * Return the slice sprite rendering type.
     */
    RenderingType getRenderingType() const;

    /**
     * Set the Cap Insets in Points using the untrimmed size as reference
     */
    void setCapInsets(const Rect& insets);
    /**
     * Returns the Cap Insets
     */
    Rect getCapInsets() const;

    void resetRender();

protected:
    void updateCapInset();
    void setupSlice9(Texture2D* texture, const Rect& capInsets);

    bool _isPatch9;

    float _insetLeft;
    float _insetRight;
    float _insetTop;
    float _insetBottom;

    Scale9Sprite::State _brightState;
    Scale9Sprite::RenderingType _renderingType;
};

}
}  // end of namespace
// end of ui group
/// @}

#endif /* defined(__cocos2d_libs__UIScale9Sprite__) */