scrollbar.h

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#ifndef __SCROLLBAR_H__
#define __SCROLLBAR_H__
 
#include "base.h"
#include "../chitralekha.h"
#include "window.h"
#include <_xeneva.h>
 
#ifdef __cplusplus
XE_EXTERN {
#endif
 
    enum _orientation_ {
        SCROLLBAR_ORIENTATION_VERTICAL,
        SCROLLBAR_ORIENTATION_HORIZONTAL,
    };
 
    enum {
        SB_STATE_IDLE,
        SB_STATE_HOVER_THUMB,
        SB_STATE_DRAGGING,
        SB_STATE_HOVER_ARRDEC,
        SB_STATE_HOVER_ARRINC
    };
 
    typedef struct _scroll_bar_ {
        ChWidget base;
        uint8_t orientation;
        uint8_t state;
        /* Range and value */
        int minValue;
        int maxValue;
        int currentValue;
        int pageSize;
 
        // thumb
        int thumbPos;
        int thumbSize;
        int trackLen;
 
        int dragAnchor;
        int dragAnchorValue;
 
        uint8_t prevButton;
        void* attachedTo;
 
        //theming
        uint32_t color_track;
        uint32_t color_thumb;
        uint32_t color_thumb_hover;
        uint32_t color_thumb_drag;
        uint32_t color_arrow_bg;
        uint32_t color_arrow_fg;
    } ChScrollBar;
 
    XE_EXPORT ChScrollBar* ChCreateScrollBar(
        int x, int y, int width, int height, uint8_t orientation);
    XE_EXPORT void ChScrollBarInit(
        ChScrollBar * sb, int x, int y, int width, int height, uint8_t orientation);
    XE_EXPORT void ChScrollBarSetValue(ChScrollBar * sb, int value);
    XE_EXPORT void ChScrollBarSetRange(ChScrollBar * sb, int min_val, int max_val, int page_size);
 
#ifdef __cplusplus
}
#endif
 
#endif