Enum EitherOf4 

pub enum EitherOf4<A, B, C, D> {
    A(A),
    B(B),
    C(C),
    D(D),
}

A view that is one of four statically-typed arms. Arm swaps behave as for Either: the old arm is torn down, the new one built fresh, and LAYOUT | PAINT is reported. See the module docs.

Variants

A(A)

Arm A.

B(B)

Arm B.

C(C)

Arm C.

D(D)

Arm D.

Trait Implementations

impl<State, A, B, C, D> View<State> for EitherOf4<A, B, C, D>

where State: 'static, A: View<State>, B: View<State>, C: View<State>, D: View<State>,

type Element = EitherOf4Widget<<A as View<State>>::Element, <B as View<State>>::Element, <C as View<State>>::Element, <D as View<State>>::Element>

The retained widget this view produces.

fn build( &self, ctx: &mut BuildCtx<'_>, ) -> <EitherOf4<A, B, C, D> as View<State>>::Element

Materialise a fresh widget for this view.

fn rebuild( &self, prev: &EitherOf4<A, B, C, D>, element: &mut <EitherOf4<A, B, C, D> as View<State>>::Element, 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 <EitherOf4<A, B, C, D> as View<State>>::Element, ctx: &mut BuildCtx<'_>, )

Tear down element when this view is being removed.

fn message( &self, element: &mut <EitherOf4<A, B, C, D> as View<State>>::Element, state: &mut State, )

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