Crate charming

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Charming is a powerful and versatile chart rendering library for Rust that leverages the power of Apache Echarts to deliver high-quality data visualization. Built with the Rust programming language, this library aims to provide the Rust ecosystem with an intuitive and effective way to generate and visualize charts, using a declarative and user-friendly API.

Basic Usage

Refer to the documentation of the Chart struct for how to create a chart with various components.

Once you create a chart, you can render it into various format. Charming provides three types of renderers:

  • HTML renderer: HtmlRenderer renders a chart into an HTML fragments and offloads the actual rendering to user’s web browser for an interactive, seamless experience. This renderer is useful when you want to render a chart on the client side, e.g., in a web application.
  • Image renderer: ImageRenderer renders a chart into an image file. This renderer makes use of an embed deno_core engine to execute the JavaScript code of Echarts and generate an image file. This renderer is disabled by default, and you need to enable the ssr (Server-Side Rendering) feature to use it.
  • WASM renderer: WasmRenderer renders a chart in a WebAssembly runtime. This renderer is disabled by default, and you need to enable the wasm feature to use it. Note that the wasm feature and ssr feature are mutually exclusive.

Here is an example of drawing a simple pie chart into an SVG file:

use charming::{
    component::Legend,
    element::ItemStyle,
    series::{Pie, PieRoseType},
    Chart, ImageRenderer
};

fn main() {
    let chart = Chart::new()
        .legend(Legend::new().top("bottom"))
        .series(
            Pie::new()
                .name("Nightingale Chart")
                .rose_type(PieRoseType::Radius)
                .radius(vec!["50", "250"])
                .center(vec!["50%", "50%"])
                .item_style(ItemStyle::new().border_radius(8))
                .data(vec![
                    (40.0, "rose 1"),
                    (38.0, "rose 2"),
                    (32.0, "rose 3"),
                    (30.0, "rose 4"),
                    (28.0, "rose 5"),
                    (26.0, "rose 6"),
                    (22.0, "rose 7"),
                    (18.0, "rose 8"),
                ]),
        );

    let mut renderer = ImageRenderer::new(1000, 800);
    renderer.save(&chart, "/tmp/nightingale.svg");
}

Themes

Charming supports a number of themes out of the box. You can use the theme::Theme enum to specify a theme for your chart. For instance, the following code snippet shows how to use the Westeros theme:

use charming::{Chart, ImageRenderer};
use charming::theme::Theme;
use charming::component::Title;

ImageRenderer::new(1000, 800).theme(Theme::Westeros).save(
    &Chart::new().title(Title::new().text("Westeros")),
    "/tmp/westeros.svg",
);

Future versions of Charming will support custom themes.

Re-exports

Modules

Macros

Structs

  • Chart
    The chart representation.

Enums