gp_widget_graph.h

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//SPDX-License-Identifier: LGPL-2.0-or-later
 
/*
 
   Copyright (c) 2014-2023 Cyril Hrubis <metan@ucw.cz>
 
 */
 
#ifndef GP_WIDGET_GRAPH_H
#define GP_WIDGET_GRAPH_H
 
#include <utils/gp_cbuffer.h>
#include <widgets/gp_widget_types.h>
#include <widgets/gp_widget_size_units.h>
 
enum gp_widget_graph_style {
        GP_WIDGET_GRAPH_POINT,
        GP_WIDGET_GRAPH_LINE,
        GP_WIDGET_GRAPH_FILL,
        GP_WIDGET_GRAPH_STYLE_MAX,
};
 
extern const char *gp_widget_graph_style_names[GP_WIDGET_GRAPH_STYLE_MAX];
 
struct gp_widget_graph_point {
        double x, y;
};
 
struct gp_widget_graph {
        gp_widget_size min_w;
        gp_widget_size min_h;
 
        const char *x_label;
        const char *y_label;
 
        long min_y_fixed:1;
        long max_y_fixed:1;
 
        /* Graph scaling window */
        double min_x;
        double max_x;
        double min_y;
        double max_y;
 
        /* Graph data */
        enum gp_widget_graph_style graph_style;
        enum gp_widgets_color color;
        gp_cbuffer data_idx;
        struct gp_widget_graph_point *data;
};
 
gp_widget *gp_widget_graph_new(gp_widget_size min_w, gp_widget_size min_h,
                               const char *x_label, const char *y_label,
                               size_t max_data_points);
 
void gp_widget_graph_point_add(gp_widget *self, double x, double y);
 
void gp_widget_graph_style_set(gp_widget *self, enum gp_widget_graph_style style);
 
void gp_widget_graph_yrange_set(gp_widget *self, double min_y, double max_y);
 
void gp_widget_graph_ymin_set(gp_widget *self, double min_y);
 
void gp_widget_graph_ymax_set(gp_widget *self, double max_y);
 
void gp_widget_graph_yrange_clear(gp_widget *self);
 
void gp_widget_graph_color_set(gp_widget *self, enum gp_widgets_color color);
 
#endif /* GP_WIDGET_GRAPH_H */