axmol/cocos/ui/UICheckBox.h

/****************************************************************************
Copyright (c) 2013-2014 Chukong Technologies Inc.

http://www.cocos2d-x.org

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****************************************************************************/

#ifndef __UICHECKBOX_H__
#define __UICHECKBOX_H__

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

/**
 * @addtogroup ui
 * @{
 */
NS_CC_BEGIN
class Sprite;

namespace ui {

/**
 * Checkbox event type, there are two type here:
 * - selected state
 * - unselected state
 * @deprecated use `CheckBox::EventType` instead
 */
typedef enum
{
    CHECKBOX_STATE_EVENT_SELECTED,
    CHECKBOX_STATE_EVENT_UNSELECTED
}CheckBoxEventType;

/**
 * A callback which will be called after checkbox event happens.
 * @deprecated use `CheckBox::ccCheckBoxCallback` instead.
 */
typedef void (Ref::*SEL_SelectedStateEvent)(Ref*,CheckBoxEventType);
#define checkboxselectedeventselector(_SELECTOR) (SEL_SelectedStateEvent)(&_SELECTOR)

/**
 *  Checkbox is a specific type of two-states button that can be either checked or unchecked.
 */
class CC_GUI_DLL CheckBox : public Widget
{
    
    DECLARE_CLASS_GUI_INFO
    
public:
    /**
     * CheckBox event type, currently only "selected" and "unselected" event are cared.
     */
    enum class EventType
    {
        SELECTED,
        UNSELECTED
    };
    
    /**
     * A callback which will be called after certain CheckBox event issue.
     * @see `CheckBox::EventType`
     */
    typedef std::function<void(Ref*,CheckBox::EventType)> ccCheckBoxCallback;
    
    /**
     * Default constructor.
     * 
     * @lua new
     */
    CheckBox();

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

    /**
     * Create and return a empty CheckBox instance pointer.
     */
    static CheckBox* create();
    
    /**
     * Create an checkbox with various images.
     *
     * @param backGround    backGround texture.
     * @param backGroundSelected    backGround selected state texture.
     * @param cross    cross texture.
     * @param backGroundDisabled    backGround disabled state texture.
     * @param frontCrossDisabled    cross dark state texture.
     * @param texType    @see `Widget::TextureResType`
     *
     * @return A CheckBox instance pointer.
     */
    static CheckBox* create(const std::string& backGround,
                            const std::string& backGroundSelected,
                            const std::string& cross,
                            const std::string& backGroundDisabled,
                            const std::string& frontCrossDisabled,
                            TextureResType texType = TextureResType::LOCAL);
    
    /**
     * Another factory method to create a CheckBox instance.
     * This method uses less resource to create a CheckBox.
     * @param backGround The background image name in `std::string`.
     * @param cross The cross image name in `std::string`.
     * @param texType  The texture's resource type in `Widget::TextureResType`.
     * @return A CheckBox instance pointer
     */
    static CheckBox* create(const std::string& backGround,
                            const std::string& cross,
                            TextureResType texType = TextureResType::LOCAL);

    /**
     * Load all textures for initializing a checkbox.
     *
     * @param background    The background image name.
     * @param backgroundSelected    The background selected image name.
     * @param cross    The cross image name.
     * @param backgroundDisabled    The background disabled state texture.
     * @param frontCrossDisabled    The front cross disabled state image name.
     * @param texType    @see `Widget::TextureResType`
     */
    void loadTextures(const std::string& background,
                      const std::string& backgroundSelected,
                      const std::string& cross,
                      const std::string& backgroundDisabled,
                      const std::string& frontCrossDisabled,
                      TextureResType texType = TextureResType::LOCAL);

    /**
     * Load background texture for checkbox.
     *
     * @param backGround   The background image name.
     * @param type    @see `Widget::TextureResType`
     */
    void loadTextureBackGround(const std::string& backGround,TextureResType type = TextureResType::LOCAL);

    /**
     * Load background selected state texture for checkbox.
     *
     * @param backGroundSelected    The background selected state image name.
     * @param texType    @see `Widget::TextureResType`
     */
    void loadTextureBackGroundSelected(const std::string& backGroundSelected,TextureResType texType = TextureResType::LOCAL);

    /**
     * Load cross texture for checkbox.
     *
     * @param crossTextureName    The cross texture name.
     * @param texType    @see `Widget::TextureResType`
     */
    void loadTextureFrontCross(const std::string& crossTextureName,TextureResType texType = TextureResType::LOCAL);

    /**
     * Load background disabled state texture for checkbox.
     *
     * @param backGroundDisabled    The background disabled state texture name.
     *
     * @param texType    @see `Widget::TextureResType`
     */
    void loadTextureBackGroundDisabled(const std::string& backGroundDisabled,TextureResType texType = TextureResType::LOCAL);

    /**
     * Load frontcross disabled texture for checkbox.
     *
     * @param frontCrossDisabled    The front cross disabled state texture name.
     * @param texType    @see `Widget::TextureResType`
     */
    void loadTextureFrontCrossDisabled(const std::string& frontCrossDisabled,TextureResType texType = TextureResType::LOCAL);

    /**
     * Change Checkbox state to selected.
     *
     * @deprecated use `isSelected()` instead
     * @param selected   True means the Checkbox will be selected, false means unselected.
     */
    CC_DEPRECATED_ATTRIBUTE void setSelectedState(bool selected){this->setSelected(selected);}

    /**
     * Query whether the CheckBox is selected or not.
     *
     * @deprecated use `setSelected(bool)` instead.
     * @return selected    true that checkbox is selected, false otherwise.
     */
    CC_DEPRECATED_ATTRIBUTE bool getSelectedState()const{return this->isSelected();}
    
    /**
     * Query whether CheckBox is selected or not.
     *@return true means "selected", false otherwise.
     */
    bool isSelected()const;

    /**
     * Change CheckBox state.
     * Set to true will cause the CheckBox's state to "selected", false otherwise.
     *@param selected Set to true will change CheckBox to selected state, false otherwise.
     */
    void setSelected(bool selected);

    /**Add a callback function which would be called when checkbox is selected or unselected.
     *@deprecated use `addEventListener(const ccCheckBoxCallback&)` instead
     *@param target A pointer type in Ref*.
     *@param selector A member function pointer in SEL_SelectedStateEvent.
     */
    CC_DEPRECATED_ATTRIBUTE void addEventListenerCheckBox(Ref* target,SEL_SelectedStateEvent selector);

    /**
     *Add a callback function which would be called when checkbox is selected or unselected.
     *@param callback A std::function with type @see `ccCheckBoxCallback`
     */
    void addEventListener(const ccCheckBoxCallback& callback);


    //override functions
    virtual Size getVirtualRendererSize() const override;
    virtual Node* getVirtualRenderer() override;
    virtual std::string getDescription() const override;
    
    /** When user pressed the CheckBox, the button will zoom to a scale.
     * The final scale of the CheckBox  equals (CheckBox original scale + _zoomScale)
     * @since v3.3
     */
    void setZoomScale(float scale);
    /**
     * @brief Return a zoom scale
     * @return A zoom scale of Checkbox.
     * @since v3.3
     */
    float getZoomScale()const;
    
CC_CONSTRUCTOR_ACCESS:
    virtual bool init() override;
    virtual bool init(const std::string& backGround,
                      const std::string& backGroundSeleted,
                      const std::string& cross,
                      const std::string& backGroundDisabled,
                      const std::string& frontCrossDisabled,
                      TextureResType texType = TextureResType::LOCAL);

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

    void setupBackgroundTexture();
    void loadTextureBackGround(SpriteFrame* spriteFrame);
    void setupBackgroundSelectedTexture();
    void loadTextureBackGroundSelected(SpriteFrame* spriteFrame);
    void setupFrontCrossTexture();
    void loadTextureFrontCross(SpriteFrame* spriteframe);
    void setupBackgroundDisable();
    void loadTextureBackGroundDisabled(SpriteFrame* spriteframe);
    void setupFrontCrossDisableTexture();
    void loadTextureFrontCrossDisabled(SpriteFrame* spriteframe);
    
    void selectedEvent();
    void unSelectedEvent();
    
    virtual void releaseUpEvent() override;
    
    virtual void onSizeChanged() override;
    
    void backGroundTextureScaleChangedWithSize();
    void backGroundSelectedTextureScaleChangedWithSize();
    void frontCrossTextureScaleChangedWithSize();
    void backGroundDisabledTextureScaleChangedWithSize();
    void frontCrossDisabledTextureScaleChangedWithSize();
    
    virtual Widget* createCloneInstance() override;
    virtual void copySpecialProperties(Widget* model) override;
    virtual void adaptRenderers() override;
protected:
    Sprite* _backGroundBoxRenderer;
    Sprite* _backGroundSelectedBoxRenderer;
    Sprite* _frontCrossRenderer;
    Sprite* _backGroundBoxDisabledRenderer;
    Sprite* _frontCrossDisabledRenderer;
    bool _isSelected;
    //if you use the old event callback, it will retain the _checkBoxEventListener
    Ref*       _checkBoxEventListener;
    
#if defined(__GNUC__) && ((__GNUC__ >= 4) || ((__GNUC__ == 3) && (__GNUC_MINOR__ >= 1)))
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#elif _MSC_VER >= 1400 //vs 2005 or higher
#pragma warning (push)
#pragma warning (disable: 4996)
#endif
    SEL_SelectedStateEvent    _checkBoxEventSelector;
#if defined(__GNUC__) && ((__GNUC__ >= 4) || ((__GNUC__ == 3) && (__GNUC_MINOR__ >= 1)))
#pragma GCC diagnostic warning "-Wdeprecated-declarations"
#elif _MSC_VER >= 1400 //vs 2005 or higher
#pragma warning (pop)
#endif
    
    ccCheckBoxCallback _checkBoxEventCallback;

    bool _isBackgroundSelectedTextureLoaded;
    bool _isBackgroundDisabledTextureLoaded;
    bool _isFrontCrossDisabledTextureLoaded;
    TextureResType _backGroundTexType;
    TextureResType _backGroundSelectedTexType;
    TextureResType _frontCrossTexType;
    TextureResType _backGroundDisabledTexType;
    TextureResType _frontCrossDisabledTexType;

    float _zoomScale;
    float _backgroundTextureScaleX;
    float _backgroundTextureScaleY;

    bool _backGroundBoxRendererAdaptDirty;
    bool _backGroundSelectedBoxRendererAdaptDirty;
    bool _frontCrossRendererAdaptDirty;
    bool _backGroundBoxDisabledRendererAdaptDirty;
    bool _frontCrossDisabledRendererAdaptDirty;
};

}

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

#endif /* defined(__CocoGUI__CheckBox__) */