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eframe web: Better panic handling (#2942)

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* Refactor: remove extra store of events

* Remove unnecessary extra function

* Refactor: simplify event registering

* Store panic summary

* egui_demo_app: move web-part to own module

* index.html: await

* Properly unsubscribe from events on panic

* Better error handling

* Demo app html: hide the wasm canvas and show an error message on panic

* egui_demo_app: add panic button to test panic response on web

* fix typo

* Use a constructor to create WebHandle

* Refactor: less use of locks in the interfaces

* More consistent naming
This commit is contained in:
Emil Ernerfeldt
2023-04-21 08:33:01 +02:00
committed by GitHub
parent 7f2de426d2
commit ac50fa0d94
10 changed files with 703 additions and 650 deletions
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50
crates/eframe/src/lib.rs
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@@ -81,61 +81,17 @@ pub use epi::*;
// ----------------------------------------------------------------------------
// When compiling for web
#[cfg(target_arch = "wasm32")]
pub mod web;
#[cfg(target_arch = "wasm32")]
pub use wasm_bindgen;
#[cfg(target_arch = "wasm32")]
use web::AppRunnerRef;
#[cfg(target_arch = "wasm32")]
pub use web_sys;
/// Install event listeners to register different input events
/// and start running the given app.
///
/// ``` no_run
/// #[cfg(target_arch = "wasm32")]
/// use wasm_bindgen::prelude::*;
///
/// /// This is the entry-point for all the web-assembly.
/// /// This is called from the HTML.
/// /// It loads the app, installs some callbacks, then returns.
/// /// It returns a handle to the running app that can be stopped calling `AppRunner::stop_web`.
/// /// You can add more callbacks like this if you want to call in to your code.
/// #[cfg(target_arch = "wasm32")]
/// #[wasm_bindgen]
/// pub struct WebHandle {
/// handle: AppRunnerRef,
/// }
/// #[cfg(target_arch = "wasm32")]
/// #[wasm_bindgen]
/// pub async fn start(canvas_id: &str) -> Result<WebHandle, eframe::wasm_bindgen::JsValue> {
/// let web_options = eframe::WebOptions::default();
/// eframe::start_web(
/// canvas_id,
/// web_options,
/// Box::new(|cc| Box::new(MyEguiApp::new(cc))),
/// )
/// .await
/// .map(|handle| WebHandle { handle })
/// }
/// ```
///
/// # Errors
/// Failing to initialize WebGL graphics.
#[cfg(target_arch = "wasm32")]
pub async fn start_web(
canvas_id: &str,
web_options: WebOptions,
app_creator: AppCreator,
) -> std::result::Result<AppRunnerRef, wasm_bindgen::JsValue> {
let handle = web::start(canvas_id, web_options, app_creator).await?;
pub mod web;
Ok(handle)
}
#[cfg(target_arch = "wasm32")]
pub use web::start_web;
// ----------------------------------------------------------------------------
// When compiling natively