buoyant 0.5.0-alpha.4

SwiftUI-like UIs in Rust for embedded devices
Documentation 
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use crate::{
    primitives::{Interpolate, Point},
    render::{AnimationDomain, Render, RenderTarget},
};

use super::AnimatedJoin;

#[derive(Debug, Clone, PartialEq, Eq)]
pub struct ShadeSubtree<C, T> {
    pub style: C,
    pub subtree: T,
}

impl<C, T> ShadeSubtree<C, T> {
    pub const fn new(style: C, subtree: T) -> Self {
        Self { style, subtree }
    }
}

impl<C: Clone + Interpolate, T: AnimatedJoin> AnimatedJoin for ShadeSubtree<C, T> {
    fn join(source: Self, target: Self, config: &AnimationDomain) -> Self {
        Self {
            style: Interpolate::interpolate(source.style, target.style, config.factor),
            subtree: T::join(source.subtree, target.subtree, config),
        }
    }
}

impl<C: Interpolate, T: Render<C>> Render<C> for ShadeSubtree<C, T> {
    fn render(&self, render_target: &mut impl RenderTarget<ColorFormat = C>, _: &C, offset: Point) {
        self.subtree.render(render_target, &self.style, offset);
    }

    fn render_animated(
        render_target: &mut impl RenderTarget<ColorFormat = C>,
        source: &Self,
        target: &Self,
        _: &C,
        offset: Point,
        domain: &AnimationDomain,
    ) {
        let style = Interpolate::interpolate(source.style, target.style, domain.factor);
        T::render_animated(
            render_target,
            &source.subtree,
            &target.subtree,
            &style,
            offset,
            domain,
        );
    }
}