iced_plot 0.4.0

//! Show rendering and fast object picking with a lot of points.
use iced_plot::PlotUiMessage;
use iced_plot::PlotWidget;
use iced_plot::Series;
use iced_plot::{MarkerStyle, PlotWidgetBuilder};

use iced::{Color, Element};

use rand_distr::{Distribution, Normal};

fn main() -> iced::Result {
    iced::application(new_scatter, update, view)
        .font(include_bytes!("fonts/FiraCodeNerdFont-Regular.ttf"))
        .default_font(iced::Font::with_name("FiraCode Nerd Font"))
        .theme(iced::theme::Theme::SolarizedDark)
        .run()
}

#[derive(Debug, Clone)]
enum Message {
    PlotMessage(PlotUiMessage),
}

fn update(widget: &mut PlotWidget, message: Message) {
    match message {
        Message::PlotMessage(plot_msg) => {
            widget.update(plot_msg);
        }
    }
}

fn view(widget: &PlotWidget) -> Element<'_, Message> {
    widget.view().map(Message::PlotMessage)
}

fn new_scatter() -> PlotWidget {
    // Generate 5 million points from 2D Gaussian
    let mut rng = rand::rng();
    let normal = Normal::new(0.0f64, 1.0f64).unwrap();
    let positions = (0..5_000_000)
        .map(|_| [normal.sample(&mut rng), normal.sample(&mut rng)])
        .collect::<Vec<[f64; 2]>>();

    let series = Series::markers_only(positions, MarkerStyle::circle(1.0))
        .with_label("2d Gaussian scatter - 5M points")
        .with_color(Color::from_rgb(0.2, 0.6, 1.0));

    PlotWidgetBuilder::new()
        .with_hover_highlight_provider(|context, point| {
            point.color = Color::from_rgb(1.0, 0.5, 0.2);
            point.resize_marker(1.5);
            Some(format!(
                "point: {}\nx: {:.3}, y: {:.3}",
                context.point_index, point.x, point.y
            ))
        })
        .with_pick_highlight_provider(|context, point| {
            point.color = Color::from_rgb(1.0, 0.0, 0.0);
            point.mask_padding = None;
            point.resize_marker(3.0);
            Some(format!(
                "point: {}\nx: {:.3}, y: {:.3}",
                context.point_index, point.x, point.y
            ))
        })
        .add_series(series.clone())
        .build()
        .unwrap()
}