#ifndef _HEXAGRAM_DIAL_H
#define _HEXAGRAM_DIAL_H

#include <hexagram/gauge.h>

typedef enum {
    HEXAGRAM_DIAL_MAIN,
    HEXAGRAM_DIAL_BOTTOM
} hexagram_dial_type;

typedef struct _hexagram_dial {
    hexagram_gauge gauge;
    hexagram_dial_type type;

    double radius,
           min_angle,
           max_angle,
           min_value,
           max_value;

    double needle_min_radius,
           needle_max_radius;

    double mark_min_radius,
           mark_max_radius;

    double value;
    cairo_pattern_t *gradient;
} hexagram_dial;

int hexagram_dial_init(hexagram_dial *dial,
                       hexagram_dial_type type,
                       double x,
                       double y,
                       double radius,
                       double min_angle,
                       double max_angle,
                       double min_value,
                       double max_value);

double hexagram_dial_angle(hexagram_dial *dial, double value);

int hexagram_dial_draw_legend(hexagram_dial *dial,
                              cairo_t *cr,
                              double radius,
                              double value,
                              char *text);

int hexagram_dial_draw_legend_offset(hexagram_dial *dial,
                                     cairo_t *cr,
                                     double radius,
                                     double value,
                                     char *text,
                                     double x_offset,
                                     double y_offset);

int hexagram_dial_draw_mark(hexagram_dial *dial,
                            cairo_t *cr,
                            double min_radius,
                            double max_radius,
                            double value);

int hexagram_dial_draw_needle(hexagram_dial *dial,
                              cairo_t *cr,
                              double min_radius,
                              double max_radius,
                              double value);

int hexagram_dial_draw_bg(hexagram_dial *dial, cairo_t *cr);

int hexagram_dial_draw_fg(hexagram_dial *dial, cairo_t *cr);

#endif /* _HEXAGRAM_DIAL_H */