Walkers is a slippy maps widget for egui, similar to very popular Leaflet, but written in Rust. It compiles to native applications as well as WASM. See the online demo here.
It supports OpenStreetMap and compatible tile servers.
Before deploying your application, please get yourself familiar with the OpenStreetMap usage policy, and consider donating the OpenStreetMap Foundation.
Walkers has three main objects. Tiles downloads images from a tile map provider
such as OpenStreetMap and stores them in a cache, MapMemory keeps track of
the widget's state and Map is the widget itself.
```rust use walkers::{Tiles, Map, MapMemory, Position, providers::openstreetmap}; use egui::{Context, CentralPanel}; use eframe::{App, Frame};
struct MyApp { tiles: Tiles, map_memory: MapMemory, }
impl MyApp { fn new(eguictx: Context) -> Self { Self { tiles: Tiles::new(openstreetmap, eguictx), map_memory: MapMemory::default(), } } }
impl App for MyApp { fn update(&mut self, ctx: &Context, frame: &mut Frame) { CentralPanel::default().show(ctx, |ui| { ui.add(Map::new( Some(&mut self.tiles), &mut self.mapmemory, Position::new(17.03664, 51.09916) )); }); } } ```
You can see a more complete example here.
In the future, Walkers will suport numerous build options, such as Android and
WASM. They all will share a common library - demo, but most will probably
require a different build workflow, not necessarily compatible with Cargo
workspaces.
sh
cd demo_native
cargo run
sh
cargo install trunk
cd demo_web
trunk serve --release