axmol/cocos/ui/UIText.h

/****************************************************************************
Copyright (c) 2013-2014 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 SOFTWARE.
****************************************************************************/

#ifndef __UILABEL_H__
#define __UILABEL_H__

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

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

NS_CC_BEGIN

class Label;

namespace ui {

/**
 *  For creating a system font or a TTF font Text
 */
class CC_GUI_DLL Text : public Widget
{
    
    DECLARE_CLASS_GUI_INFO
    
public:
    /** Type Text type.
     */
    enum class Type
    {
        SYSTEM,
        TTF
    };
    /**
     * Default constructor.
     * @js ctor
     * @lua new
     */
    Text();

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

    /**
     * Create a Text object.
     *
     * @return An autoreleased Text object.
     */
    static Text* create();
    
    /**
     *  Create a Text object with textContent, fontName and fontSize.
     *  The fontName could be a system font name or a TTF file path.
     *  Usage:  Text *text = Text::create("Hello", "Arial", 20);  //create a system font UIText.
     *          Text *text = Text::create("Hello", "xxx\xxx.ttf", 20); //create a TTF font UIText.
     *
     * @param textContent Text content string.
     * @param fontName A given font name.
     * @param fontSize A given font size.
     * @return An autoreleased Text object.
     */
    static Text* create(const std::string& textContent,
                        const std::string& fontName,
                        int fontSize);

    /**
     * Changes the string value of label.
     *
     * @param text  String value.
     */
    CC_DEPRECATED_ATTRIBUTE void setText(const std::string& text){this->setString(text);}
    void setString(const std::string& text);

    /**
     * Gets the string value of label.
     *
     * @return String value.
     */
    CC_DEPRECATED_ATTRIBUTE const std::string& getStringValue(){ return this->getString();}
    const std::string& getString()const;

    /**
     * Gets the string length of the label.
     * Note: This length will be larger than the raw string length,
     * if you want to get the raw string length, you should call this->getString().size() instead.
     *
     * @return  String length.
     */
    ssize_t getStringLength()const;

    /**
     * Sets the font size of label.
     *
     * @param size The font size.
     */
    void setFontSize(int size);

    /**
     * Gets the font size of label.
     *
     * @return The font size.
     */
    int getFontSize()const;

    /**
     * Sets the font name of label.
     *  If you are trying to use a system font, you could just pass a font name
     * If you are trying to use a TTF, you should pass a file path to the TTF file
     * Usage:  Text *text = Text::create("Hello", "Arial", 20);  //create a system font UIText
     *         text->setFontName("Marfelt");  // it will change the font  to  system font no matter the previous font type is TTF or system font
     *         text->setFontName("xxxx/xxx.ttf"); //it will change the font  to TTF font no matter the previous font type is TTF or system font
     * @param name Font name.
     */
    void setFontName(const std::string& name);

    /** Gets the font name.
     *
     * @return Font name.
     */
    const std::string& getFontName()const;
    
    /** Gets the font type.
     * @return The font type.
     */
    Type getType() const;

    /**
     * Sets the touch scale enabled of label.
     *
     * @param enabled Touch scale enabled of label.
     */
    void setTouchScaleChangeEnabled(bool enabled);

    /**
     * Gets the touch scale enabled of label.
     *
     * @return  Touch scale enabled of label.
     */
    bool isTouchScaleChangeEnabled()const;

    //override "getVirtualRendererSize" method of widget.
    virtual Size getVirtualRendererSize() const override;

    //override "getVirtualRenderer" method of widget.
    virtual Node* getVirtualRenderer() override;

    /** Gets the render size in auto mode.
     *
     * @return The size of render size in auto mode.
     */
    virtual Size getAutoRenderSize();

    /**
     * Returns the "class name" of widget.
     */
    virtual std::string getDescription() const override;

    /**
     * Sets the rendering size of the text, you should call this method
     * along with calling `ignoreContentAdaptWithSize(false)`, otherwise the text area
     * size is caculated by the real size of the text content.
     *
     * @param size The text rendering area size.
     *
     */
    void setTextAreaSize(const Size &size);

    /** Return the text rendering area size.
     *
     * @return The text rendering area size.
     */
    const Size& getTextAreaSize()const;

    /** Sets text horizontal alignment.
     *
     * @param alignment Horizontal text alignment type
     */
    void setTextHorizontalAlignment(TextHAlignment alignment);

    /** Gets text horizontal alignment.
     *
     * @return Horizontal text alignment type
     */
    TextHAlignment getTextHorizontalAlignment()const;

    /** Sets text vertical alignment.
     *
     * @param alignment vertical text alignment type
     */
    void setTextVerticalAlignment(TextVAlignment alignment);

    /** Gets text vertical alignment.
     *
     * @return Vertical text alignment type
     */
    TextVAlignment getTextVerticalAlignment()const;
    
    /** Sets text color.
     *
     * @param color Text color.
     */
    void setTextColor(const Color4B color);
    
    /** Gets text color.
     *
     * @return Text color.
     */
    const Color4B& getTextColor() const;
    
    /**
     * Enable shadow for the label.
     *
     * @todo support blur for shadow effect
     *
     * @param shadowColor The color of shadow effect.
     * @param offset The offset of shadow effect.
     * @param blurRadius The blur radius of shadow effect.
     */
    void enableShadow(const Color4B& shadowColor = Color4B::BLACK,const Size &offset = Size(2,-2), int blurRadius = 0);
    
    /**
     * Enable outline for the label.
     * It only works on IOS and Android when you use System fonts.
     *
     * @param outlineColor The color of outline.
     * @param outlineSize The size of outline.
     */ 
    void enableOutline(const Color4B& outlineColor,int outlineSize = 1);
    
    /** Only support for TTF.
     *
     * @param glowColor The color of glow.
     */
    void enableGlow(const Color4B& glowColor);
    
    /** Disable shadow/outline/glow rendering.
     */
    void disableEffect();
    
CC_CONSTRUCTOR_ACCESS:
    virtual bool init() override;
    virtual bool init(const std::string& textContent,
                      const std::string& fontName,
                      int fontSize);

protected:
    virtual void initRenderer() override;
    virtual void onPressStateChangedToNormal() override;
    virtual void onPressStateChangedToPressed() override;
    virtual void onPressStateChangedToDisabled() override;
    virtual void onSizeChanged() override;
   
    void labelScaleChangedWithSize();
    virtual Widget* createCloneInstance() override;
    virtual void copySpecialProperties(Widget* model) override;
    virtual void adaptRenderers() override;
protected:
    bool _touchScaleChangeEnabled;
    float _normalScaleValueX;
    float _normalScaleValueY;
    std::string _fontName;
    int _fontSize;
    float _onSelectedScaleOffset;
    Label* _labelRenderer;
    bool _labelRendererAdaptDirty;
    Type _type;
};

}

NS_CC_END

// end of ui group
/// @}

#endif /* defined(__CocoGUI__Label__) */