feat: use lyon for easing

1 files changed, 0 insertions, 425 deletions

diff --git a/examples/progress_indicators/src/circular.rs b/examples/progress_indicators/src/circular.rs
deleted file mode 100644
index 2a9f7e1e..00000000
--- a/examples/progress_indicators/src/circular.rs
+++ /dev/null
@@ -1,425 +0,0 @@
-//! Show a circular progress indicator.
-use iced::widget::canvas::{self, Cursor, Program, Renderer as CanvasRenderer};
-use iced::window;
-use iced_core::event::{self, Event};
-use iced_core::time::Instant;
-use iced_core::widget::tree::{self, Tree};
-use iced_core::window::RedrawRequest;
-use iced_core::{layout, Size};
-use iced_core::{renderer, Vector};
-use iced_core::{
-    Background, Clipboard, Color, Element, Layout, Length, Point, Rectangle,
-    Renderer, Shell, Widget,
-};
-
-use super::easing::{self, Easing};
-
-use std::borrow::Cow;
-use std::f32::consts::PI;
-use std::time::Duration;
-
-type R<Theme> = iced_widget::renderer::Renderer<Theme>;
-
-const MIN_RADIANS: f32 = PI / 8.0;
-const WRAP_RADIANS: f32 = 2.0 * PI - PI / 4.0;
-const PROCESSION_VELOCITY: u32 = u32::MAX / 120;
-
-#[allow(missing_debug_implementations)]
-pub struct Circular<'a, Theme>
-where
-    Theme: StyleSheet,
-{
-    size: f32,
-    bar_height: f32,
-    style: <Theme as StyleSheet>::Style,
-    easing: Cow<'a, Easing>,
-    cycle_duration: Duration,
-}
-
-impl<'a, Theme> Circular<'a, Theme>
-where
-    Theme: StyleSheet,
-{
-    /// Creates a new [`Circular`] with the given content.
-    pub fn new() -> Self {
-        Circular {
-            size: 40.0,
-            bar_height: 4.0,
-            style: <Theme as StyleSheet>::Style::default(),
-            easing: Cow::Borrowed(&easing::STANDARD),
-            cycle_duration: Duration::from_millis(600),
-        }
-    }
-
-    /// Sets the size of the [`Circular`].
-    pub fn size(mut self, size: f32) -> Self {
-        self.size = size;
-        self
-    }
-
-    /// Sets the bar height of the [`Circular`].
-    pub fn bar_height(mut self, bar_height: f32) -> Self {
-        self.bar_height = bar_height;
-        self
-    }
-
-    /// Sets the style variant of this [`Circular`].
-    pub fn style(mut self, style: <Theme as StyleSheet>::Style) -> Self {
-        self.style = style;
-        self
-    }
-
-    /// Sets the easing of this [`Circular`].
-    pub fn easing(mut self, easing: impl Into<Cow<'a, Easing>>) -> Self {
-        self.easing = easing.into();
-        self
-    }
-
-    /// Sets the cycle duration of this [`Circular`].
-    pub fn cycle_duration(mut self, duration: Duration) -> Self {
-        self.cycle_duration = duration / 2;
-        self
-    }
-}
-
-impl<'a, Theme> Default for Circular<'a, Theme>
-where
-    Theme: StyleSheet,
-{
-    fn default() -> Self {
-        Self::new()
-    }
-}
-
-#[derive(Clone, Copy)]
-enum State {
-    Expanding {
-        start: Instant,
-        progress: f32,
-        procession: u32,
-    },
-    Contracting {
-        start: Instant,
-        progress: f32,
-        procession: u32,
-    },
-}
-
-impl Default for State {
-    fn default() -> Self {
-        Self::Expanding {
-            start: Instant::now(),
-            progress: 0.0,
-            procession: 0,
-        }
-    }
-}
-
-impl State {
-    fn next(&self, now: Instant) -> Self {
-        match self {
-            Self::Expanding { procession, .. } => Self::Contracting {
-                start: now,
-                progress: 0.0,
-                procession: procession.wrapping_add(PROCESSION_VELOCITY),
-            },
-            Self::Contracting { procession, .. } => Self::Expanding {
-                start: now,
-                progress: 0.0,
-                procession: procession.wrapping_add(
-                    PROCESSION_VELOCITY.wrapping_add(
-                        ((WRAP_RADIANS / (2.0 * PI)) * u32::MAX as f32) as u32,
-                    ),
-                ),
-            },
-        }
-    }
-
-    fn start(&self) -> Instant {
-        match self {
-            Self::Expanding { start, .. } | Self::Contracting { start, .. } => {
-                *start
-            }
-        }
-    }
-
-    fn timed_transition(&self, cycle_duration: Duration, now: Instant) -> Self {
-        let elapsed = now.duration_since(self.start());
-
-        match elapsed {
-            elapsed if elapsed > cycle_duration => self.next(now),
-            _ => self.with_elapsed(cycle_duration, elapsed),
-        }
-    }
-
-    fn with_elapsed(
-        &self,
-        cycle_duration: Duration,
-        elapsed: Duration,
-    ) -> Self {
-        let progress = elapsed.as_secs_f32() / cycle_duration.as_secs_f32();
-        match self {
-            Self::Expanding {
-                start, procession, ..
-            } => Self::Expanding {
-                start: *start,
-                progress,
-                procession: procession.wrapping_add(PROCESSION_VELOCITY),
-            },
-            Self::Contracting {
-                start, procession, ..
-            } => Self::Contracting {
-                start: *start,
-                progress,
-                procession: procession.wrapping_add(PROCESSION_VELOCITY),
-            },
-        }
-    }
-
-    fn procession(&self) -> f32 {
-        match self {
-            Self::Expanding { procession, .. }
-            | Self::Contracting { procession, .. } => {
-                *procession as f32 / u32::MAX as f32
-            }
-        }
-    }
-}
-
-impl<'a, Message, Theme> Widget<Message, R<Theme>> for Circular<'a, Theme>
-where
-    Message: 'a + Clone,
-    Theme: StyleSheet,
-{
-    fn tag(&self) -> tree::Tag {
-        tree::Tag::of::<State>()
-    }
-
-    fn state(&self) -> tree::State {
-        tree::State::new(State::default())
-    }
-
-    fn width(&self) -> Length {
-        Length::Fixed(self.size)
-    }
-
-    fn height(&self) -> Length {
-        Length::Fixed(self.size)
-    }
-
-    fn layout(
-        &self,
-        _renderer: &iced_widget::renderer::Renderer<Theme>,
-        limits: &layout::Limits,
-    ) -> layout::Node {
-        let limits = limits.width(self.size).height(self.size);
-        let size = limits.resolve(Size::ZERO);
-
-        layout::Node::new(size)
-    }
-
-    fn on_event(
-        &mut self,
-        tree: &mut Tree,
-        event: Event,
-        _layout: Layout<'_>,
-        _cursor_position: Point,
-        _renderer: &iced_widget::renderer::Renderer<Theme>,
-        _clipboard: &mut dyn Clipboard,
-        shell: &mut Shell<'_, Message>,
-    ) -> event::Status {
-        let state = tree.state.downcast_mut::<State>();
-
-        if let Event::Window(window::Event::RedrawRequested(now)) = event {
-            *state = state.timed_transition(self.cycle_duration, now);
-
-            shell.request_redraw(RedrawRequest::NextFrame);
-        }
-
-        event::Status::Ignored
-    }
-
-    fn draw(
-        &self,
-        tree: &Tree,
-        renderer: &mut R<Theme>,
-        theme: &Theme,
-        _style: &renderer::Style,
-        layout: Layout<'_>,
-        _cursor_position: Point,
-        _viewport: &Rectangle,
-    ) {
-        let bounds = layout.bounds();
-        let state = tree.state.downcast_ref::<State>();
-
-        renderer.with_translation(
-            Vector::new(bounds.x, bounds.y),
-            |renderer| {
-                renderer.draw(<StateWithStyle<Theme> as Program<
-                    Message,
-                    R<Theme>,
-                >>::draw(
-                    &StateWithStyle {
-                        state,
-                        style: &self.style,
-                        bar_height: self.bar_height,
-                        easing: self.easing.as_ref(),
-                    },
-                    &(),
-                    renderer,
-                    theme,
-                    bounds,
-                    Cursor::Unavailable,
-                ));
-            },
-        );
-    }
-}
-
-impl<'a, Message, Theme> From<Circular<'a, Theme>>
-    for Element<'a, Message, R<Theme>>
-where
-    Message: Clone + 'a,
-    Theme: StyleSheet + 'a,
-{
-    fn from(circular: Circular<'a, Theme>) -> Self {
-        Self::new(circular)
-    }
-}
-
-#[derive(Debug, Clone, Copy)]
-pub struct Appearance {
-    /// The [`Background`] of the progress indicator.
-    pub background: Option<Background>,
-    /// The track [`Color`] of the progress indicator.
-    pub track_color: Color,
-    /// The bar [`Color`] of the progress indicator.
-    pub bar_color: Color,
-}
-
-impl std::default::Default for Appearance {
-    fn default() -> Self {
-        Self {
-            background: None,
-            track_color: Color::TRANSPARENT,
-            bar_color: Color::BLACK,
-        }
-    }
-}
-
-/// A set of rules that dictate the style of an indicator.
-pub trait StyleSheet {
-    /// The supported style of the [`StyleSheet`].
-    type Style: Default;
-
-    /// Produces the active [`Appearance`] of a indicator.
-    fn appearance(&self, style: &Self::Style) -> Appearance;
-}
-
-impl StyleSheet for iced::Theme {
-    type Style = ();
-
-    fn appearance(&self, _style: &Self::Style) -> Appearance {
-        let palette = self.extended_palette();
-
-        Appearance {
-            background: None,
-            track_color: palette.background.weak.color,
-            bar_color: palette.primary.base.color,
-        }
-    }
-}
-
-struct StateWithStyle<'a, Theme>
-where
-    Theme: StyleSheet,
-{
-    state: &'a State,
-    style: &'a <Theme as StyleSheet>::Style,
-    easing: &'a Easing,
-    bar_height: f32,
-}
-
-impl<'a, Message, Theme>
-    canvas::Program<Message, iced_widget::renderer::Renderer<Theme>>
-    for StateWithStyle<'a, Theme>
-where
-    Theme: StyleSheet,
-{
-    type State = ();
-
-    fn update(
-        &self,
-        _state: &mut Self::State,
-        _event: canvas::Event,
-        _bounds: Rectangle,
-        _cursor: canvas::Cursor,
-    ) -> (canvas::event::Status, Option<Message>) {
-        (canvas::event::Status::Ignored, None)
-    }
-
-    fn draw(
-        &self,
-        _state: &Self::State,
-        renderer: &iced_widget::renderer::Renderer<Theme>,
-        theme: &Theme,
-        bounds: Rectangle,
-        _cursor: canvas::Cursor,
-    ) -> Vec<canvas::Geometry> {
-        let mut frame = canvas::Frame::new(renderer, bounds.size());
-        let custom_style = <Theme as StyleSheet>::appearance(theme, self.style);
-        let track_radius = frame.width() / 2.0 - self.bar_height;
-
-        if let Some(Background::Color(color)) = custom_style.background {
-            let background_path =
-                canvas::Path::circle(frame.center(), track_radius);
-            frame.fill(&background_path, color);
-        }
-
-        let track_path = canvas::Path::circle(frame.center(), track_radius);
-
-        frame.stroke(
-            &track_path,
-            canvas::Stroke::default()
-                .with_color(custom_style.track_color)
-                .with_width(self.bar_height),
-        );
-
-        let mut builder = canvas::path::Builder::new();
-
-        let start = self.state.procession() * 2.0 * PI;
-
-        match self.state {
-            State::Expanding { progress, .. } => {
-                builder.arc(canvas::path::Arc {
-                    center: frame.center(),
-                    radius: track_radius,
-                    start_angle: start,
-                    end_angle: start
-                        + MIN_RADIANS
-                        + WRAP_RADIANS * (self.easing.y_at_x(*progress)),
-                });
-            }
-            State::Contracting { progress, .. } => {
-                builder.arc(canvas::path::Arc {
-                    center: frame.center(),
-                    radius: track_radius,
-                    start_angle: start
-                        + WRAP_RADIANS * (self.easing.y_at_x(*progress)),
-                    end_angle: start + MIN_RADIANS + WRAP_RADIANS,
-                });
-            }
-        }
-
-        let bar_path = builder.build();
-
-        frame.stroke(
-            &bar_path,
-            canvas::Stroke::default()
-                .with_color(custom_style.bar_color)
-                .with_width(self.bar_height),
-        );
-
-        vec![frame.into_geometry()]
-    }
-}