StackedBarChart

#include "toolkit/charts/stacked_bar_chart.hpp"

A stacked (or normalized/100%) bar chart over a shared set of categories, with grid, legend, hover tooltips, and pan & zoom (see the charts overview). Inherits Widget.

macOS

Material

Windows 11

Windows 95

Plasma 6

GNOME

Data types

struct StackedBarCategory { float x; std::string label; };
struct StackedBarSeries { std::string name; Color color; std::vector<float> values; };

Each series' values are aligned positionally with set_categories().

Example

auto chart = std::make_unique<toolkit::StackedBarChart>();
chart->set_categories({{0, "Mon"}, {1, "Tue"}, {2, "Wed"}});
chart->add_series({"Reads", toolkit::Color::rgb(0.2f, 0.5f, 0.8f), {10, 12, 9}});
chart->add_series({"Writes", toolkit::Color::rgb(0.8f, 0.4f, 0.2f), {4, 6, 5}});

Construction

StackedBarChart();

API

Member	Description
set_categories(std::vector<StackedBarCategory>)	Define the shared X-axis categories
add_series(StackedBarSeries) / clear() / series_count()	Manage data series
set_normalized(bool)	Stack as 100% relative shares instead of absolute values
set_title(std::string)	Chart title
set_x_label(std::string) / set_y_label(std::string)	Axis labels
set_show_grid(bool) / set_show_legend(bool)	Toggle chrome

Callbacks

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