LineChart

#include "toolkit/charts/line_chart.hpp"

A multi-series line chart with grid, legend, hover tooltips, and scroll/drag pan & zoom (see the charts overview). Inherits Widget.

macOS

Material

Windows 11

Windows 95

Plasma 6

GNOME

Data types

struct ChartDataPoint { float x, y; std::string label; };
struct ChartSeries { std::string name; Color color; std::vector<ChartDataPoint> points; };

Example

auto chart = std::make_unique<toolkit::LineChart>();
chart->add_series({"Requests/s", toolkit::Color::rgb(0.2f, 0.5f, 0.9f),
                    {{0, 10, ""}, {1, 14, ""}, {2, 9, ""}}});
chart->set_title("Traffic");

Construction

LineChart();

API

Member	Description
add_series(ChartSeries) / clear_series() / series_count()	Manage data series
set_title(std::string) / title()	Chart title
set_x_label(std::string) / set_y_label(std::string)	Axis labels
set_show_grid(bool) / set_show_legend(bool)	Toggle chrome
set_auto_range(bool)	Auto-fit the Y range to data (default: on)
set_y_range(float min, float max)	Fix the Y range explicitly (disables auto-range)

Callbacks

Callback	Description
on_hover — std::function<void(size_t series_idx, size_t point_idx)>	Fired as the pointer hovers a data point