31 lines
651 B
Rust
31 lines
651 B
Rust
use wasm_bindgen::prelude::*;
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pub type DrawResult<T> = Result<T, Box<dyn std::error::Error>>;
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/// Result of screen to chart coordinates conversion.
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#[wasm_bindgen]
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pub struct Point {
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pub x: f32,
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pub y: f32,
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}
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#[wasm_bindgen]
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impl Point {
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pub fn new(x: f32, y: f32) -> Self { Self { x, y } }
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}
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#[wasm_bindgen]
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pub struct Chart {
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pub(crate) convert: Box<dyn Fn((i32, i32)) -> Option<(f32, f32)>>,
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pub(crate) area: f32,
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}
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#[wasm_bindgen]
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impl Chart {
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pub fn get_area(&self) -> f32 { self.area }
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pub fn coord(&self, x: i32, y: i32) -> Option<Point> {
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(self.convert)((x, y)).map(|(x, y)| Point::new(x, y))
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}
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}
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