Struct CanvasSizing 

pub struct CanvasSizing(/* private fields */);

The sizing policy of one Canvas.

CanvasSizing::viewport is the ordinary policy: a Canvas consumes a finite parent allocation and needs an explicit extent on an unbounded axis. Built-in presentations may internally construct an intrinsic policy whose requirements participate in normal View layout without inspecting Canvas items.

use urushi::{CanvasSizing, Size};

let first = CanvasSizing::viewport().width(12).height(4);
let same = CanvasSizing::viewport().extent(Size::new(12, 4));
assert_eq!(first, same);

Implementations

impl CanvasSizing

pub const fn viewport() -> Self

Creates viewport sizing without fallback extents.

pub const fn width(self, width: usize) -> Self

States the extent viewport sizing uses when the width axis is unbounded.

Panics

Panics when applied to the crate-private intrinsic variant. Replace the complete policy with Canvas::sizing instead.

pub const fn height(self, height: usize) -> Self

States the extent viewport sizing uses when the height axis is unbounded.

Panics

Panics when applied to the crate-private intrinsic variant. Replace the complete policy with Canvas::sizing instead.

pub const fn extent(self, size: Size) -> Self

States both fallback extents used by viewport sizing.

Panics

Panics when applied to the crate-private intrinsic variant. Replace the complete policy with Canvas::sizing instead.

Trait Implementations

impl Clone for CanvasSizing

fn clone(&self) -> CanvasSizing

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for CanvasSizing

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for CanvasSizing

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for CanvasSizing

fn eq(&self, other: &CanvasSizing) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for CanvasSizing