Scrollbar.h

#ifndef DSGC_SCROLLBAR_H
#define DSGC_SCROLLBAR_H
 
#include "Component.h"
 
namespace dsgc {
    class Scrollbar : public Component {
        private:
            unsigned int knobAccessibleLength;
            unsigned int knobLength;
            float knobRelativePosition;
        protected:
            Scrollbar(Adafruit_GFX &graphics, unsigned int x, unsigned int y, unsigned int width, unsigned int height, unsigned int trackLength, double knobRelativeSize);
            unsigned int getKnobLength();
            unsigned int getKnobPositionOffset();

            virtual unsigned int getKnobX();
            virtual unsigned int getKnobY();
            virtual unsigned int getKnobWidth();
            virtual unsigned int getKnobHeight();
 
            static const unsigned int KNOB_RADIUS;
            static const unsigned int KNOB_WIDTH;
            static const unsigned int BORDER_RADIUS;
            static const unsigned int BORDER_WIDTH;
        public:
            virtual void paint() override;

            void setKnobRelativePosition(float relativePosition);

            float getKnobRelativePosition();
    };
}
 
#endif // #ifndef DSGC_SCROLLBAR_H