Struct DropdownPanelView 

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

A declarative dropdown option panel. See dropdown_panel.

Implementations

impl<State: 'static> DropdownPanelView<State>

pub fn anchor(self, anchor: &OverlayAnchor) -> Self

Point the panel at the trigger’s captured rect — what width-matches it to the field (see the module docs).

pub fn selected(self, selected: Vec<String>) -> Self

Hand the panel the app-confirmed selection (option values).

pub fn multi(self, multi: bool) -> Self

Allow more than one option at a time.

pub fn max_selections(self, max: usize) -> Self

Cap a multi-select at max options; 0 is unlimited.

pub fn query(self, query: impl Into<String>) -> Self

Hand the panel the app-confirmed filter query.

pub fn searchable(self, searchable: bool) -> Self

Show the search field above the option list.

pub fn loading(self, loading: bool) -> Self

Show the busy row instead of the option list.

pub fn error(self, error: Option<String>) -> Self

Show a load failure instead of the option list.

pub fn empty_text(self, text: impl Into<String>) -> Self

Replace the empty-state message.

pub fn max_height(self, max_height: f64) -> Self

Cap the panel’s height, past which the option list scrolls.

pub fn open(self, open: bool) -> Self

Tell the panel whether its host is open. false clears the keyboard highlight and the press machine on the spot; the default is true.

pub fn on_open<F: Fn(&mut State, bool) + 'static>(self, on_open: F) -> Self

Set the open callback — fired with false after a single-select pick.

pub fn on_query<F: Fn(&mut State, String) + 'static>(self, on_query: F) -> Self

Set the query callback: each edit of the search field reports the text it requests.

Trait Implementations

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

type Element = DropdownPanelWidget

The retained widget this view produces.

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

Materialise a fresh widget for this view.

fn rebuild( &self, prev: &Self, element: &mut DropdownPanelWidget, 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 DropdownPanelWidget, 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.