egui 0.12.0

Simple, portable immediate mode GUI library for Rust
Documentation 
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use std::string::String;

use crate::*;

pub(crate) struct LegendEntry {
    pub text: String,
    pub color: Color32,
    pub checked: bool,
    pub hovered: bool,
}

impl LegendEntry {
    pub fn new(text: String, color: Color32, checked: bool) -> Self {
        Self {
            text,
            color,
            checked,
            hovered: false,
        }
    }
}

impl Widget for &mut LegendEntry {
    fn ui(self, ui: &mut Ui) -> Response {
        let LegendEntry {
            checked,
            text,
            color,
            ..
        } = self;
        let icon_width = ui.spacing().icon_width;
        let icon_spacing = ui.spacing().icon_spacing;
        let padding = vec2(2.0, 2.0);
        let total_extra = padding + vec2(icon_width + icon_spacing, 0.0) + padding;

        let text_style = TextStyle::Button;
        let galley = ui.fonts().layout_no_wrap(text_style, text.clone());

        let mut desired_size = total_extra + galley.size;
        desired_size = desired_size.at_least(ui.spacing().interact_size);
        desired_size.y = desired_size.y.at_least(icon_width);

        let (rect, response) = ui.allocate_exact_size(desired_size, Sense::click());
        let rect = rect.shrink2(padding);

        response.widget_info(|| WidgetInfo::selected(WidgetType::Checkbox, *checked, &galley.text));

        let visuals = ui.style().interact(&response);

        let (small_icon_rect, big_icon_rect) = ui.spacing().icon_rectangles(rect);

        let painter = ui.painter();

        painter.add(Shape::Circle {
            center: big_icon_rect.center(),
            radius: big_icon_rect.width() / 2.0 + visuals.expansion,
            fill: visuals.bg_fill,
            stroke: visuals.bg_stroke,
        });

        if *checked {
            painter.add(Shape::Circle {
                center: small_icon_rect.center(),
                radius: small_icon_rect.width() * 0.8,
                fill: *color,
                stroke: Default::default(),
            });
        }

        let text_position = pos2(
            rect.left() + padding.x + icon_width + icon_spacing,
            rect.center().y - 0.5 * galley.size.y,
        );
        painter.galley(text_position, galley, visuals.text_color());

        self.checked ^= response.clicked_by(PointerButton::Primary);
        self.hovered = response.hovered();

        response
    }
}