sge_ui 1.1.4

UI library for SGE
Documentation 
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use std::f32::consts::{GOLDEN_RATIO, TAU};

use sge_api::shapes_2d::draw_sdf;
use sge_time::oscillate_t;
use sge_types::Sdf;

use super::*;

#[derive(Debug)]
pub struct LoadingSpinner(Color);

impl LoadingSpinner {
    pub fn new(color: Color) -> UiRef {
        Self(color).to_ref()
    }
}

impl UiNode for LoadingSpinner {
    fn draw(&self, area: Area, _: &UiState) -> Vec2 {
        let area = area.square();
        let thickness = area.size.x / 8.0;

        let a = (time() * 7.0) % TAU;
        let b = a - oscillate_t(0.4, TAU - 0.5, time() * GOLDEN_RATIO);

        let sdf =
            Sdf::ring(area.center(), area.size / 2.0, thickness, a, b).with_fill_solid(self.0);
        draw_sdf(sdf);

        area.size
    }

    fn preferred_dimensions(&self) -> Vec2 {
        Vec2::new(50.0, 50.0)
    }

    fn size(&self, area: Area) -> Vec2 {
        area.size
    }
}