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winit-sonoma-fix/README.md
tomaka 769d4fe897 Emscripten rework (#286) 
* partial implementation for emscripten

this pull request contain a partial but working implementation of emscripten backend

some implementations may be controversial.

here some implementation detail:

* cursor state:
  * on grab: emscripten request pointer lock deferred and also set a callback when pointer lock change
             the callback request pointer lock deferred.
  * on hide: `emscripten_hide_mouse` exist but not `emscripten_show_mouse`
             a pull request has been open on october 2016 but never been merged
             so I copied the javascript function and put it in emscripten_asm_const function

* fullscreen: if fullscreen is requested then it request fullscreen deferred and set a callback on fullscreen change
              the callback request fullscreen deferred

* run forever: this method use emscripten main loop to run an infinite loop

* keyboard callback doesn't consume the event. I think it is more apopriate as in desktop environment it is the same, is it ?

* emscripten dir is added in example and contains html pages

Some things that are not implemented:

* lots of events

* min and max dimension can be implemented with a callback that listen to size change and resize if dimension out of bound

* title may be implemented using javascript to change document.title

* Use std::os::raw in the emscripten bindings

* Fix emscripten code

* Update code

* Add CI

* Remove the emscripten-specific examples

* Add some information to the README
2017-09-14 16:31:34 +02:00

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winit - Cross-platform window creation and management in Rust

Docs.rs

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[dependencies]
winit = "0.7"

Documentation

Usage

Winit is a window creation and management library. It can create windows and lets you handle events (for example: the window being resized, a key being pressed, a mouse mouvement, etc.) produced by window.

Winit is designed to be a low-level brick in a hierarchy of libraries. Consequently, in order to show something on the window you need to use the platform-specific getters provided by winit, or another library.

extern crate winit;

fn main() {
    let mut events_loop = winit::EventsLoop::new();
    let window = winit::Window::new(&events_loop).unwrap();

    events_loop.run_forever(|event| {
        match event {
            winit::Event::WindowEvent { event: winit::WindowEvent::Closed, .. } => {
                winit::ControlFlow::Break
            },
            _ => winit::ControlFlow::Continue,
        }
    });
}

Platform-specific usage

Emscripten and WebAssembly

Building a binary will yield a .js file. In order to use it in an HTML file, you need to:

  • Put a <canvas id="my_id"></canvas> element somewhere. A canvas corresponds to a winit "window".
  • Write a Javascript code that creates a global variable named Module. Set Module.canvas to the ID of the <canvas> element (in the example this would be "my_id"). More information here.
  • Make sure that you insert the .js file generated by Rust after the Module variable is created.