Struct DropdownState 

pub struct DropdownState<T: DropdownItem> {
    pub filtered: Vec<T>,
    pub selected: usize,
    pub scroll_offset: usize,
    pub title: String,
    /* private fields */
}

Generic dropdown state. Owns the filtered item list, selection, and scroll offset. Type parameter T must implement DropdownItem.

Fields

filtered: Vec<T>

Currently visible items after filtering.

selected: usize

Index into filtered.

scroll_offset: usize

Scroll offset for the visible window.

title: String

Title shown above the dropdown.

Implementations

impl<T: DropdownItem> DropdownState<T>

pub fn new(items: Vec<T>, title: impl Into<String>) -> Self

Create a new dropdown with the given items and title.

pub fn apply_filter(&mut self, filter: &str) -> bool

Apply a filter string. Resets selection to 0. Returns false if no items match (caller can dismiss).

pub fn up(&mut self)

Move selection up.

pub fn down(&mut self)

Move selection down (wraps around).

pub fn selected_item(&self) -> Option<&T>

Get the currently selected item, if any.

pub fn is_empty(&self) -> bool

Check if the dropdown has any items to show.

pub fn visible_count(&self) -> usize

Number of visible rows this dropdown will occupy (including title + padding).

Trait Implementations

impl<T: Clone + DropdownItem> Clone for DropdownState<T>

fn clone(&self) -> DropdownState<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.