walkers 0.54.0

slippy map widget for egui
Documentation 
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use egui::{Response, Ui};

use crate::{MapMemory, Projector};

/// Plugins allow drawing custom shapes on the map. After implementing this trait for your type,
/// you can add it to the map with [`crate::Map::with_plugin`]
pub trait Plugin {
    /// Function called at each frame.
    ///
    /// The provided [`Ui`] has its [`Ui::max_rect`] set to the full rect that was allocated
    /// by the map widget. Implementations should typically use the provided [`Projector`] to
    /// compute target screen coordinates and use one of the various egui methods to draw at these
    /// coordinates instead of relying on [`Ui`] layout system.
    ///
    /// The provided [`Response`] is the response of the map widget itself and can be used to test
    /// if the mouse is hovering or clicking on the map.
    fn run(
        self: Box<Self>,
        ui: &mut Ui,
        response: &Response,
        projector: &Projector,
        map_memory: &MapMemory,
    );
}