ui_plot.h

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#pragma once
 
#include <stdbool.h>
#include <stdint.h>
 
#include "gfx.h"
#include "ui_layout.h"
 
#ifdef __cplusplus
extern "C" {
#endif

#define UI_PLOT_MAX_SERIES 6
#define UI_PLOT_HISTORY    UI_PANEL_W
 
typedef struct {
    const char *name;
    const char *unit;
    gfx_color_t color;
    int         decimals;
    float       floor;
    uint8_t     follows;
} ui_plot_series_t;
 
typedef struct {
    ui_plot_series_t series[UI_PLOT_MAX_SERIES];
    int   count;
 
    float ring[UI_PLOT_MAX_SERIES][UI_PLOT_HISTORY];
    int   head;      
    int   filled;    
 
    float scale[UI_PLOT_MAX_SERIES];
    int   shrink_hold[UI_PLOT_MAX_SERIES];
    bool  hidden[UI_PLOT_MAX_SERIES];
    int   focus;     
 
    float span_s;    

    bool running;

    uint32_t pushes;

    uint32_t revision;
} ui_plot_t;

float ui_plot_nice_ceil(float v);

void ui_plot_init(ui_plot_t *p, const ui_plot_series_t *series, int count,
                  float span_s);

void ui_plot_push(ui_plot_t *p, const float *values);

void ui_plot_set_running(ui_plot_t *p, bool running);

void ui_plot_clear(ui_plot_t *p);

float ui_plot_sample(const ui_plot_t *p, int series, int back);

void ui_plot_update_scales(ui_plot_t *p, int visible_samples);

void ui_plot_touch_series(ui_plot_t *p, int series);

int ui_plot_map_y(const ui_plot_t *p, int series, float value, int y0, int h);

void ui_plot_render(const ui_plot_t *p, gfx_canvas_t *c, gfx_rect_t r);

void ui_plot_render_legend(const ui_plot_t *p, gfx_canvas_t *c, gfx_rect_t r);
 
#ifdef __cplusplus
}
#endif