87 lines
2.1 KiB
C
87 lines
2.1 KiB
C
#include <stdlib.h>
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#include <math.h>
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#include <hexagram/gauge.h>
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#include <hexagram/fuel.h>
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#define RAD (M_PI / 180.0)
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#define LEVEL_MIN 0
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#define LEVEL_WARN 2
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#define LEVEL_MAX 15
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#define ANGLE_MIN (144.0 * RAD)
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#define ANGLE_MAX (216.0 * RAD)
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#define FONT_FACE "Muli"
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static int draw_bg(hexagram_gauge *gauge, cairo_t *cr) {
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hexagram_fuel *fuel = (hexagram_fuel *)gauge;
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int level;
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if (hexagram_dial_draw_bg(&fuel->dial, cr) < 0) {
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goto error_dial_draw_bg;
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}
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cairo_select_font_face(cr,
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FONT_FACE,
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CAIRO_FONT_SLANT_NORMAL,
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CAIRO_FONT_WEIGHT_BOLD);
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cairo_set_font_size(cr, fuel->dial.radius * 0.1);
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cairo_set_source_rgb(cr, 1, 0, 0);
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hexagram_dial_draw_legend(&fuel->dial, cr, 0, "0");
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cairo_set_source_rgb(cr, 1, 1, 1);
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hexagram_dial_draw_legend(&fuel->dial, cr, fuel->dial.max_value, "1");
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cairo_set_line_width(cr, 6.0);
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for (level=0; level<=LEVEL_MAX; level++) {
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double min_radius;
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if (level < 2) {
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min_radius = 0.84;
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cairo_set_source_rgb(cr, 1, 0, 0);
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} else if (level < 4) {
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min_radius = 0.82;
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cairo_set_source_rgb(cr, 1, 0, 0);
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} else {
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min_radius = 0.82;
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cairo_set_source_rgb(cr, 1, 1, 1);
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}
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hexagram_dial_draw_mark(&fuel->dial, cr, min_radius, 0.87, level);
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}
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return 0;
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error_dial_draw_bg:
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return -1;
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}
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int hexagram_fuel_init(hexagram_fuel *fuel,
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double x,
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double y,
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double radius) {
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if (hexagram_dial_init(&fuel->dial,
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HEXAGRAM_DIAL_BOTTOM,
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x,
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y,
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radius,
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ANGLE_MIN,
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ANGLE_MAX,
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LEVEL_MIN,
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LEVEL_MAX) < 0) {
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goto error_dial_init;
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}
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fuel->dial.gauge.draw_bg = draw_bg;
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fuel->dial.value = LEVEL_MIN;
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return 0;
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error_dial_init:
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return -1;
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}
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