Struct Engine 

pub struct Engine { /* private fields */ }

One tree of slots; several roots (the main tree, every overlay layer).

Implementations

impl Engine

pub fn new() -> Engine

pub fn set_rounding(&mut self, on: bool)

Off = fractional frames (the default).

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

pub fn resize(&mut self, n: usize)

Grow (or shrink) to n slots; new slots are empty leaves.

pub fn clear(&mut self)

pub fn set_style(&mut self, i: u32, style: Style) -> bool

Replace a slot’s style; its cache and its ancestors’ are cleared when the style differs.

pub fn style(&self, i: u32) -> &Style

pub fn set_children(&mut self, i: u32, children: &[u32])

Set a slot’s children (parent pointers follow); dirty when changed.

pub fn children(&self, i: u32) -> &[u32]

pub fn set_measured(&mut self, i: u32, measured: bool)

pub fn mark_dirty(&mut self, i: u32)

Forget the cached layout of i and every ancestor.

pub fn mark_all_dirty(&mut self)

pub fn compute( &mut self, root: u32, available: Size<AvailableSpace>, measure: &mut MeasureFn<'_>, )

Lay out the tree under root against the available space.

pub fn layout(&self, i: u32) -> &Layout

The final layout of a slot (relative to its parent).

Trait Implementations

impl Clone for Engine

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Engine

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

Formats the value using the given formatter.

impl Default for Engine

fn default() -> Self

Returns the “default value” for a type.