Struct FlexView 

pub struct FlexView<State: 'static> { /* private fields */ }

A declarative flex container. See the module docs.

Implementations

impl<State: 'static> FlexView<State>

pub fn new(direction: Axis, children: Vec<FlexChild<State>>) -> Self

Create a flex laying children out along direction, cross-aligned to the start and main-aligned to the start.

pub fn child<V: View<State>>(self, view: V) -> Self

Append an inflexible child. Accepts any View; erasure happens internally, so no any() is needed.

pub fn flex<V: View<State>>(self, flex: u32, view: V) -> Self

Append a flexible child taking flex proportional shares of the free main-axis space.

pub fn keyed<V: View<State>>(self, key: impl Into<ChildKey>, view: V) -> Self

Append an inflexible child tagged with a stable ChildKey (see keyed for the reconciliation semantics and the all-or-nothing rule).

pub fn children<M>(self, children: impl ViewSeq<State, M>) -> Self

Append every element of children as an inflexible child.

Accepts any ViewSeq: a Vec/array of views, a tuple of mixed view types, an Option, nested sequences, or views(iter) for an iterator. Tuples are positional: a None element drops its slot and nested sequences flatten in order. For a keyed list use FlexView::keyed per child (the all-or-nothing rule of keyed still applies; a tuple does not carry keys).

pub fn push(self, child: FlexChild<State>) -> Self

Append a pre-built FlexChild (escape hatch for flexible / inflexible / keyed values built elsewhere).

pub fn when(self, cond: bool, f: impl FnOnce(Self) -> Self) -> Self

Apply f to the builder only when cond is true.

pub fn when_some<T>( self, opt: Option<T>, f: impl FnOnce(Self, T) -> Self, ) -> Self

Apply f with the contained value when opt is Some.

pub fn cross_axis(self, cross: CrossAxisAlignment) -> Self

Set the cross-axis alignment.

pub fn main_axis(self, main: MainAxisAlignment) -> Self

Set the main-axis alignment.

Trait Implementations

impl<State: 'static> View<State> for FlexView<State>

type Element = FlexWidget

The retained widget this view produces.

fn build(&self, ctx: &mut BuildCtx<'_>) -> FlexWidget

Materialise a fresh widget for this view.

fn rebuild( &self, prev: &Self, element: &mut FlexWidget, ctx: &mut BuildCtx<'_>, ) -> ChangeFlags

Reconcile prev (the previous view of the same type) against the live element, mutating it in place and reporting what changed.

fn teardown(&self, element: &mut FlexWidget, ctx: &mut BuildCtx<'_>)

Tear down element when this view is being removed.

fn message(&self, _element: &mut Self::Element, _state: &mut State)

Deliver an event message to this view, mutating application state.