axmol/cocos/ui/UIButton.h

/****************************************************************************
Copyright (c) 2013-2016 Chukong Technologies Inc.
Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
Copyright (c) 2021 Bytedance Inc.

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Permission is hereby granted, free of charge, to any person obtaining a copy
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****************************************************************************/

#ifndef __UIBUTTON_H__
#define __UIBUTTON_H__

#include "ui/UIWidget.h"
#include "ui/GUIExport.h"

/**
 * @addtogroup ui
 * @{
 */
NS_CC_BEGIN

class Label;
class SpriteFrame;
struct CC_DLL ResourceData;

namespace ui
{

class Scale9Sprite;
/**
 * Represents a push-button widget.
 * Push-buttons can be pressed, or clicked, by the user to perform an action.
 */
class CC_GUI_DLL Button : public Widget
{

    DECLARE_CLASS_GUI_INFO

public:
    /**
     * Default constructor.
     */
    Button();

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

    /**
     * Create a empty Button.
     *@return A empty Button instance.
     */
    static Button* create();

    /**
     * Create a button with custom textures.
     * @param normalImage normal state texture name.
     * @param selectedImage  selected state texture name.
     * @param disableImage disabled state texture name.
     * @param texType    @see `TextureResType`
     * @return a Button instance.
     */
    static Button* create(std::string_view normalImage,
                          std::string_view selectedImage = "",
                          std::string_view disableImage  = "",
                          TextureResType texType         = TextureResType::LOCAL);

    /**
     * Load textures for button.
     *
     * @param normal    normal state texture name.
     * @param selected    selected state texture name.
     * @param disabled    disabled state texture name.
     * @param texType    @see `TextureResType`
     */
    void loadTextures(std::string_view normal,
                      std::string_view selected,
                      std::string_view disabled = "",
                      TextureResType texType    = TextureResType::LOCAL);

    /**
     * Load normal state texture for button.
     *
     * @param normal    normal state texture.
     * @param texType    @see `TextureResType`
     */
    void loadTextureNormal(std::string_view normal, TextureResType texType = TextureResType::LOCAL);

    /**
     * Load selected state texture for button.
     *
     * @param selected    selected state texture.
     * @param texType    @see `TextureResType`
     */
    void loadTexturePressed(std::string_view selected, TextureResType texType = TextureResType::LOCAL);

    /**
     * Load disabled state texture for button.
     *
     * @param disabled    dark state texture.
     * @param texType    @see `TextureResType`
     */
    void loadTextureDisabled(std::string_view disabled, TextureResType texType = TextureResType::LOCAL);

    /**
     * Sets capInsets for button.
     * The capInset affects  all button scale9 renderer only if `setScale9Enabled(true)` is called
     *
     * @param capInsets    capInset in Rect.
     */
    void setCapInsets(const Rect& capInsets);

    /**
     * Sets capInsets for button, only the normal state scale9 renderer will be affected.
     *
     * @param capInsets    capInsets in Rect.
     */
    void setCapInsetsNormalRenderer(const Rect& capInsets);

    /**
     * Return the capInsets of normal state scale9sprite.
     *@return The normal scale9 renderer capInsets.
     */
    const Rect& getCapInsetsNormalRenderer() const;

    /**
     * Sets capInsets for button, only the pressed state scale9 renderer will be affected.
     *
     * @param capInsets    capInsets in Rect
     */
    void setCapInsetsPressedRenderer(const Rect& capInsets);

    /**
     * Return the capInsets of pressed state scale9sprite.
     *@return The pressed scale9 renderer capInsets.
     */
    const Rect& getCapInsetsPressedRenderer() const;

    /**
     * Sets capInsets for button, only the disabled state scale9 renderer will be affected.
     *
     * @param capInsets  capInsets in Rect.
     */
    void setCapInsetsDisabledRenderer(const Rect& capInsets);

    /**
     * Return the capInsets of disabled state scale9sprite.
     *@return The disabled scale9 renderer capInsets.
     */
    const Rect& getCapInsetsDisabledRenderer() const;

    /**
     * Enable scale9 renderer.
     *
     * @param enable Set to true will use scale9 renderer, false otherwise.
     */
    virtual void setScale9Enabled(bool enable);

    /**
     * Query whether button is using scale9 renderer or not.
     *@return whether button use scale9 renderer or not.
     */
    bool isScale9Enabled() const;

    /**
     * Enable zooming action when button is pressed.
     *
     * @param enabled Set to true will enable zoom effect, false otherwise.
     */
    void setPressedActionEnabled(bool enabled);

    // override methods
    virtual void ignoreContentAdaptWithSize(bool ignore) override;
    virtual Vec2 getVirtualRendererSize() const override;
    virtual Node* getVirtualRenderer() override;
    virtual std::string getDescription() const override;

    /**
     * Return the inner title renderer of Button.
     * @return The button title.
     * @since v3.3
     */
    Label* getTitleRenderer() const;

    /**
     * Change the content of button's title.
     *@param text The title in std::string.
     */
    void setTitleText(std::string_view text);

    /**
     * Query the button title content.
     *@return Get the button's title content.
     */
    std::string_view getTitleText() const;

    /**
     * Change the color of button's title.
     *@param color The title color in Color3B.
     */
    void setTitleColor(const Color3B& color);

    /**
     * Query the button title color.
     *@return Color3B of button title.
     */
    Color3B getTitleColor() const;

    /**
     * Change the font size of button's title
     *@param size Title font size in float.
     */
    void setTitleFontSize(float size);

    /**
     * Query the font size of button title
     *@return font size in float.
     */
    float getTitleFontSize() const;

    /**
     * Change the font name of button's title
     *@param fontName a font name string.
     */
    void setTitleFontName(std::string_view fontName);

    /**
     * Query the font name of button's title
     *@return font name in std::string
     */
    std::string_view getTitleFontName() const;

    /**
     * Sets the title's text horizontal alignment.
     *
     * @param hAlignment see TextHAlignment
     */
    void setTitleAlignment(TextHAlignment hAlignment);

    /**
     * Sets the title's text vertical alignment.
     *
     * @param hAlignment see TextHAlignment.
     * @param vAlignment see TextVAlignment.
     */
    void setTitleAlignment(TextHAlignment hAlignment, TextVAlignment vAlignment);

    /** replaces the current Label node with a new one */
    void setTitleLabel(Label* label);

    /** returns the current Label being used */
    Label* getTitleLabel() const;

    /** @brief When user pressed the button, the button will zoom to a scale.
     * The final scale of the button  equals (button original scale + _zoomScale)
     * @since v3.3
     */
    void setZoomScale(float scale);

    /**
     * @brief Return a zoom scale
     * @return the zoom scale in float
     * @since v3.3
     */
    float getZoomScale() const;

    /**
     * @brief Return the nine-patch sprite of normal state
     * @return the nine-patch sprite of normal state
     * @since v3.9
     */
    Scale9Sprite* getRendererNormal() const { return _buttonNormalRenderer; }

    /**
     * @brief Return the nine-patch sprite of clicked state
     * @return the nine-patch sprite of clicked state
     * @since v3.9
     */
    Scale9Sprite* getRendererClicked() const { return _buttonClickedRenderer; }

    /**
     * @brief Return the nine-patch sprite of disabled state
     * @return the nine-patch sprite of disabled state
     * @since v3.9
     */
    Scale9Sprite* getRendererDisabled() const { return _buttonDisabledRenderer; }

    void resetNormalRender();
    void resetPressedRender();
    void resetDisabledRender();

    ResourceData getNormalFile();
    ResourceData getPressedFile();
    ResourceData getDisabledFile();

    CC_CONSTRUCTOR_ACCESS : virtual bool init() override;
    virtual bool init(std::string_view normalImage,
                      std::string_view selectedImage = "",
                      std::string_view disableImage  = "",
                      TextureResType texType         = TextureResType::LOCAL);

    virtual Vec2 getNormalTextureSize() const;

protected:
    virtual void initRenderer() override;
    virtual void onPressStateChangedToNormal() override;
    virtual void onPressStateChangedToPressed() override;
    virtual void onPressStateChangedToDisabled() override;
    virtual void onSizeChanged() override;

    void loadTextureNormal(SpriteFrame* normalSpriteFrame);
    void setupNormalTexture(bool textureLoaded);
    void loadTexturePressed(SpriteFrame* pressedSpriteFrame);
    void setupPressedTexture(bool textureLoaded);
    void loadTextureDisabled(SpriteFrame* disabledSpriteFrame);
    void setupDisabledTexture(bool textureLoaded);

    void normalTextureScaleChangedWithSize();
    void pressedTextureScaleChangedWithSize();
    void disabledTextureScaleChangedWithSize();

    virtual void adaptRenderers() override;
    virtual void updateTitleLocation();
    void updateContentSize();
    virtual void createTitleRenderer();
    bool createTitleRendererIfNull();

    virtual Widget* createCloneInstance() override;
    virtual void copySpecialProperties(Widget* model) override;

    virtual Vec2 getNormalSize() const;

protected:
    Scale9Sprite* _buttonNormalRenderer;
    Scale9Sprite* _buttonClickedRenderer;
    Scale9Sprite* _buttonDisabledRenderer;
    Label* _titleRenderer;

    float _zoomScale;
    bool _prevIgnoreSize;
    bool _scale9Enabled;
    bool _pressedActionEnabled;

    Rect _capInsetsNormal;
    Rect _capInsetsPressed;
    Rect _capInsetsDisabled;

    Vec2 _normalTextureSize;
    Vec2 _pressedTextureSize;
    Vec2 _disabledTextureSize;

    bool _normalTextureLoaded;
    bool _pressedTextureLoaded;
    bool _disabledTextureLoaded;
    bool _normalTextureAdaptDirty;
    bool _pressedTextureAdaptDirty;
    bool _disabledTextureAdaptDirty;

    std::string _normalFileName;
    std::string _clickedFileName;
    std::string _disabledFileName;
    TextureResType _normalTexType;
    TextureResType _pressedTexType;
    TextureResType _disabledTexType;

protected:
    std::string _fontName;
};

}  // namespace ui

NS_CC_END
// end of ui group
/// @}

#endif /* defined(__CocoGUI__Button__) */