67 lines
1.9 KiB
Rust
67 lines
1.9 KiB
Rust
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use crate::dpi::LogicalSize;
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use crate::error::OsError as RootOE;
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use crate::platform_impl::OsError;
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use wasm_bindgen::JsCast;
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use web_sys::HtmlCanvasElement;
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pub struct Canvas {
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raw: HtmlCanvasElement,
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}
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impl Canvas {
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pub fn create() -> Result<Self, RootOE> {
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let window = web_sys::window().expect("Failed to obtain window");
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let document = window.document().expect("Failed to obtain document");
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let canvas: HtmlCanvasElement = document
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.create_element("canvas")
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.map_err(|_| os_error!(OsError("Failed to create canvas element".to_owned())))?
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.unchecked_into();
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document
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.body()
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.ok_or_else(|| os_error!(OsError("Failed to find body node".to_owned())))?
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.append_child(&canvas)
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.map_err(|_| os_error!(OsError("Failed to append canvas".to_owned())))?;
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Ok(Canvas { raw: canvas })
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}
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pub fn set_attribute(&self, attribute: &str, value: &str) {
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self.raw
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.set_attribute(attribute, value)
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.expect(&format!("Set attribute: {}", attribute));
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}
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pub fn position(&self) -> (f64, f64) {
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let bounds = self.raw.get_bounding_client_rect();
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(bounds.x(), bounds.y())
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}
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pub fn width(&self) -> f64 {
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self.raw.width() as f64
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}
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pub fn height(&self) -> f64 {
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self.raw.height() as f64
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}
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pub fn set_size(&self, size: LogicalSize) {
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self.raw.set_width(size.width as u32);
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self.raw.set_height(size.height as u32);
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}
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pub fn raw(&self) -> HtmlCanvasElement {
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self.raw.clone()
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}
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pub fn on_mouse_out<F>(&self, f: F) {}
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pub fn on_mouse_over<F>(&self, f: F) {}
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pub fn on_mouse_up<F>(&self, f: F) {}
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pub fn on_mouse_down<F>(&self, f: F) {}
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pub fn on_mouse_move<F>(&self, f: F) {}
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pub fn on_mouse_scroll<F>(&self, f: F) {}
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}
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