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57 lines
2.1 KiB
Markdown
57 lines
2.1 KiB
Markdown
# winit - Cross-platform window creation and management in Rust
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[](https://crates.io/crates/winit)
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[](https://docs.rs/winit)
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[](https://travis-ci.org/tomaka/winit)
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[](https://ci.appveyor.com/project/tomaka/winit/branch/master)
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```toml
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[dependencies]
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winit = "0.16"
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```
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## [Documentation](https://docs.rs/winit)
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## Usage
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Winit is a window creation and management library. It can create windows and lets you handle
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events (for example: the window being resized, a key being pressed, a mouse movement, etc.)
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produced by window.
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Winit is designed to be a low-level brick in a hierarchy of libraries. Consequently, in order to
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show something on the window you need to use the platform-specific getters provided by winit, or
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another library.
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```rust
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extern crate winit;
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fn main() {
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let mut events_loop = winit::EventsLoop::new();
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let window = winit::Window::new(&events_loop).unwrap();
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events_loop.run_forever(|event| {
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match event {
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winit::Event::WindowEvent {
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event: winit::WindowEvent::CloseRequested,
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..
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} => winit::ControlFlow::Break,
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_ => winit::ControlFlow::Continue,
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}
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});
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}
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```
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### Platform-specific usage
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#### Emscripten and WebAssembly
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Building a binary will yield a `.js` file. In order to use it in an HTML file, you need to:
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- Put a `<canvas id="my_id"></canvas>` element somewhere. A canvas corresponds to a winit "window".
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- Write a Javascript code that creates a global variable named `Module`. Set `Module.canvas` to
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the element of the `<canvas>` element (in the example you would retrieve it via `document.getElementById("my_id")`).
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More information [here](https://kripken.github.io/emscripten-site/docs/api_reference/module.html).
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- Make sure that you insert the `.js` file generated by Rust after the `Module` variable is created.
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