gled 2.6.2

gled is an application for creating animations and effects on artnet or wled light installations
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use egui::{Color32, CornerRadius, Pos2, Rect, Shape, Stroke, Vec2};
use emath::RectTransform;
use serde::{Deserialize, Serialize};

const CONTROL_POINT_RADIUS: f32 = 8.0;

#[derive(Serialize, Deserialize, Copy, Clone, Debug, PartialEq, Eq)]
pub enum CurvePoint {
    First(Pos2),
    /// All other points
    Inner(Pos2),
    /// In between each Outer and Inner Points are the Bezier points to define the curves
    Bezier(Pos2),
    Last(Pos2),
}

impl CurvePoint {
    pub fn invert_y_axis(&mut self) {
        let mut pos = self.pos();
        pos.y = 1.0 - pos.y;
        self.set_pos(pos);
    }

    pub fn invert_x_axis(&mut self) {
        let mut pos = self.pos();
        pos.x = 4.0 - pos.x;
        *self = match self {
            CurvePoint::First(_) => CurvePoint::Last(pos),
            CurvePoint::Inner(_) => CurvePoint::Inner(pos),
            CurvePoint::Bezier(_) => CurvePoint::Bezier(pos),
            CurvePoint::Last(_) => CurvePoint::First(pos),
        };
    }

    pub fn is_inner(&self) -> bool {
        matches!(self, CurvePoint::Inner(_))
    }

    pub fn is_outer(&self) -> bool {
        matches!(self, CurvePoint::First(_) | CurvePoint::Last(_))
    }

    pub fn is_bezier(&self) -> bool {
        matches!(self, CurvePoint::Bezier(_))
    }

    pub fn point_rect(&self, to_screen: RectTransform) -> Rect {
        Rect::from_center_size(
            self.screen_pos(to_screen),
            Vec2::splat(2.0 * CONTROL_POINT_RADIUS),
        )
    }

    pub fn shape(&self, to_screen: RectTransform, stroke: Stroke) -> Shape {
        match self {
            CurvePoint::First(_) => {
                let point_rect = self.point_rect(to_screen);
                Shape::convex_polygon(
                    vec![
                        point_rect.center_top(),
                        point_rect.center_bottom(),
                        point_rect.right_center(),
                    ],
                    Color32::TRANSPARENT,
                    stroke,
                )
            }
            CurvePoint::Inner(_) => Shape::rect_stroke(
                self.point_rect(to_screen),
                CornerRadius::default(),
                stroke,
                egui::StrokeKind::Inside,
            ),
            CurvePoint::Bezier(_) => {
                Shape::circle_stroke(self.screen_pos(to_screen), CONTROL_POINT_RADIUS, stroke)
            }
            CurvePoint::Last(_) => {
                let point_rect = self.point_rect(to_screen);
                Shape::convex_polygon(
                    vec![
                        point_rect.center_top(),
                        point_rect.center_bottom(),
                        point_rect.left_center(),
                    ],
                    Color32::TRANSPARENT,
                    stroke,
                )
            }
        }
    }

    pub fn screen_pos(&self, to_screen: RectTransform) -> Pos2 {
        to_screen.transform_pos(self.pos())
    }

    pub fn set_screen_pos(&mut self, to_screen: RectTransform, screen_pos: Pos2) {
        self.set_pos(to_screen.inverse().transform_pos_clamped(screen_pos));
    }

    pub fn pos(&self) -> Pos2 {
        match self {
            CurvePoint::First(pos) => *pos,
            CurvePoint::Inner(pos) => *pos,
            CurvePoint::Bezier(pos) => *pos,
            CurvePoint::Last(pos) => *pos,
        }
    }

    pub fn set_pos(&mut self, new_pos: Pos2) {
        match self {
            CurvePoint::First(pos) | CurvePoint::Last(pos) => pos.y = new_pos.y,
            CurvePoint::Inner(pos) | CurvePoint::Bezier(pos) => *pos = new_pos,
        }
    }
}