1fe4a7a4ea
This allows Winit to take control of existing canvas elements in the DOM, which is useful for web applications with other content in the page.
53 lines
1.5 KiB
Rust
53 lines
1.5 KiB
Rust
#![cfg(target_arch = "wasm32")]
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//! The web target does not automatically insert the canvas element object into the web page, to
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//! allow end users to determine how the page should be laid out. Use the `WindowExtStdweb` or
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//! `WindowExtWebSys` traits (depending on your web backend) to retrieve the canvas from the
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//! Window. Alternatively, use the `WindowBuilderExtStdweb` or `WindowBuilderExtWebSys` to provide
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//! your own canvas.
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use crate::window::WindowBuilder;
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#[cfg(feature = "stdweb")]
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use stdweb::web::html_element::CanvasElement;
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#[cfg(feature = "stdweb")]
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pub trait WindowExtStdweb {
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fn canvas(&self) -> CanvasElement;
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}
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#[cfg(feature = "web-sys")]
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use web_sys::HtmlCanvasElement;
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#[cfg(feature = "web-sys")]
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pub trait WindowExtWebSys {
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fn canvas(&self) -> HtmlCanvasElement;
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}
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#[cfg(feature = "stdweb")]
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pub trait WindowBuilderExtStdweb {
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fn with_canvas(self, canvas: Option<CanvasElement>) -> Self;
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}
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#[cfg(feature = "stdweb")]
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impl WindowBuilderExtStdweb for WindowBuilder {
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fn with_canvas(mut self, canvas: Option<CanvasElement>) -> Self {
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self.platform_specific.canvas = canvas;
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self
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}
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}
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#[cfg(feature = "web-sys")]
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pub trait WindowBuilderExtWebSys {
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fn with_canvas(self, canvas: Option<HtmlCanvasElement>) -> Self;
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}
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#[cfg(feature = "web-sys")]
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impl WindowBuilderExtWebSys for WindowBuilder {
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fn with_canvas(mut self, canvas: Option<HtmlCanvasElement>) -> Self {
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self.platform_specific.canvas = canvas;
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self
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}
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}
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