87 lines
2.2 KiB
C
87 lines
2.2 KiB
C
#include <math.h>
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#include <hexagram/gauge.h>
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#include <hexagram/thermo.h>
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#define RAD (M_PI / 180.0)
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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 LEVEL_MIN 48
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#define LEVEL_WARN 116
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#define LEVEL_MAX 127
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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_thermo *thermo = (hexagram_thermo *)gauge;
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double incr;
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int i;
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if (hexagram_dial_draw_bg(&thermo->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, thermo->dial.radius * 0.1);
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cairo_set_source_rgba(cr, 1, 1, 1, gauge->alpha);
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hexagram_dial_draw_legend(&thermo->dial, cr, thermo->dial.min_value, "C");
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cairo_set_source_rgba(cr, 1, 0, 0, gauge->alpha);
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hexagram_dial_draw_legend(&thermo->dial, cr, thermo->dial.max_value, "H");
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cairo_set_line_width(cr, 6.0);
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incr = (thermo->dial.max_value - thermo->dial.min_value) / 8.0;
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for (i=0; i<9; i++) {
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double level = thermo->dial.min_value + i * incr;
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if (level >= LEVEL_WARN) {
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cairo_set_source_rgba(cr, 0.8, 0, 0, gauge->alpha);
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} else {
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cairo_set_source_rgba(cr, 1, 1, 1, gauge->alpha);
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}
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hexagram_dial_draw_mark(&thermo->dial, cr, level, 1);
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level += incr;
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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_thermo_init(hexagram_thermo *thermo,
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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(&thermo->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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thermo->dial.gauge.draw_bg = draw_bg;
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thermo->dial.value = LEVEL_MIN;
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thermo->level_warn = LEVEL_WARN;
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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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