Struct LayoutBuilder 

pub struct LayoutBuilder<S: GlobalState> {
    pub id: Option<WidgetId>,
    pub flex_grow: f32,
    pub flex_shrink: f32,
    /* private fields */
}

A closure-backed widget that receives its parent’s last known constraints.

The constraint value comes from the previous layout pass when an explicit id is supplied. Otherwise it falls back to a loose constraint derived from the current viewport. Prefer normal responsive widgets first; use LayoutBuilder when the child tree itself must change with available size.

Fields

id: Option<WidgetId>

Optional stable identity for constraint look-up across frames.

flex_grow: f32

Flex grow factor applied to the wrapper when id is set.

flex_shrink: f32

Flex shrink factor applied to the wrapper when id is set.

Implementations

impl<S: GlobalState> LayoutBuilder<S>

pub fn new<F>(builder: F) -> Self

where F: Fn(BuildCtxHandle<S>, ViewHandle<S>, BoxConstraints) -> Widget + Send + Sync + 'static,

pub fn flex_grow(self, grow: f32) -> Self

pub fn flex_shrink(self, shrink: f32) -> Self

Trait Implementations

impl<S: Clone + GlobalState> Clone for LayoutBuilder<S>

fn clone(&self) -> LayoutBuilder<S>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<S: GlobalState> From<LayoutBuilder<S>> for Widget

fn from(component: LayoutBuilder<S>) -> Self

Converts to this type from the input type.