IncularPath
Immutable bezier paths with bounds, hit testing, and transforms.
Immutable Arc<BezPath> with cached bounds and a fresh PathId per
build/transform.
| Builder | Segment |
|---|---|
move_to(p) | Start a new contour |
line_to(p) | Straight segment |
quadratic_to(c, p) | Quadratic bezier |
cubic_to(a, b, p) | Cubic bezier |
close() | Close the contour |
build() | Freeze into an immutable Path |
path.bez_path(), bounds(), id(), contains(point, rule), and
transformed(t) (fresh id) round out the API — bounds and contains use
the Kurbo winding rule.
use incular::prelude::*;
use std::sync::Arc;
fn main() {
let mut b = Path::builder();
b.move_to(Offset::new(0.0, 0.0));
b.line_to(Offset::new(100.0, 40.0));
b.close();
let path = Arc::new(b.build());
println!("bounded: {}", path.bounds().is_some());
let app = Application::new(move |_cx| {
Container::builder()
.padding(EdgeInsets::all(24.0))
.alignment(Alignment::CENTER)
.child(CustomPaint::new(
Size::new(200.0, 120.0),
{
let mut canvas = Canvas::default();
canvas.fill_path(
path.clone(),
Brush::from(Color::WHITE),
FillRule::NonZero,
);
canvas.finish()
},
))
.build()
.into()
})
.expect("valid application");
incular::run(app).expect("run application");
}path.bez_path(), path.bounds(), and path.id() read the frozen shape;
path.contains(point, FillRule::NonZero) hit-tests with the Kurbo winding
rule; path.transformed(transform) returns a copy with a fresh id.
FillRule: NonZero / EvenOdd (winding for contains and fills).
Decoration geometry
use incular::prelude::*;
fn main() {
let border = RenderBorder::new(1.0, Color::BLACK);
println!("border width: {}", border.width);
let radii = CornerRadii::uniform(8.0);
println!("radii: {:?}", radii);
let rect = Rect::from_origin_size(
Offset::new(0.0, 0.0),
Size::new(100.0, 40.0),
);
let rrect = RRect::uniform(rect, 8.0);
println!("contains: {}", rrect.contains(Offset::new(10.0, 10.0)));
}Widget-level extras: BorderSide, BoxBorder, BoxShape::Rectangle
(default) / Circle, BlurStyle, BoxShadow, TileMode, DecorationImage,
full BoxDecoration with is_valid(), change_impact(), invalidation().
PathBuilder constructs paths (move_to / line_to / quadratic_to /
cubic_to / close / build). BorderDirectional mirrors Border with
start/end edges; BorderRadiusDirectional mirrors corner radii;
BorderRadius is the four-corner radius set; BorderStyle: solid and
decorative stroke styles.