GuiText.h

/****************************************************************************
 * libgui
 * Daryl Borth 2009-2026
 * GuiText.h
 ***************************************************************************/
#pragma once

class GuiText : public GuiElement
{
    public:
        GuiText(const char * t, int s, PixelColor c);
        GuiText(const char * t);
        ~GuiText();
        void setText(const char * t);
        void setWText(wchar_t * t);
        int getLength();
        static void setPresets(int sz, PixelColor c, int w, uint16_t s, ALIGN_H h, ALIGN_V v);
        void setFontSize(int s);
        void setMaxWidth(int w);
        int getTextWidth();
        void getNaturalSize(int& w, int& h) override;
        void setScroll(SCROLL s);
        void setWrap(bool w, int width = 0);
        void setColor(PixelColor c);
        void setStyle(uint16_t s);
        void setAlignment(ALIGN_H hor, ALIGN_V vert);
        void setNudgeY(int n) { nudgeY = n; }
        void setLineSpacing(int px) { lineSpacing = px; }
        void resetText();
    void draw() override;
    private:
        PixelColor color; 
        wchar_t* text; 
        wchar_t *textDyn[20]; 
        int textDynNum; 
        char * origText; 
        int size; 
        int maxWidth; 
        SCROLL textScroll; 
        int textScrollPos; 
        int textScrollInitialDelay; 
        int textScrollDelay; 
        uint32_t textScrollLastTick = 0; 
        uint16_t style; 
        bool wrap; 
        int nudgeY = 0; 
        int lineSpacing = 6; 
 
        // What measuring the text cost, kept so a layout pass that asks for the size every frame costs
        // nothing. Measured at `size`, and valid while the text, the size and the font are unchanged.
        int measuredW;              
        int measuredH;              
        int measuredSize;           
        uint32_t measuredGen;       
        // The same for the full width of the text at the size it is drawn at (which follows the
        // element's scale), used by the scroll check every frame
        int fullWidth;
        int fullWidthSize;          
        uint32_t fullWidthGen;
 
        wchar_t* getText(const char *text) const;
        bool scrollStepDue();
        void measure();
        void forgetMeasurements();
        int getFullWidth(int atSize);
};
 
extern GuiTextTranslator* textTranslator;