Struct FocusManager 

pub struct FocusManager<T: Clone + Eq + Hash = usize> { /* private fields */ }

Focus manager for Tab navigation.

Manages a list of focusable elements and tracks which one currently has focus. Elements are navigated in registration order.

Type Parameters

• T - The type used to identify focusable elements. Must implement Clone, Eq, and Hash. Commonly an enum or integer type.

Implementations

impl<T: Clone + Eq + Hash> FocusManager<T>

pub fn new() -> Self

Create a new empty focus manager.

pub fn with_capacity(capacity: usize) -> Self

Create a new focus manager with pre-allocated capacity.

pub fn register(&mut self, element: T)

Register a focusable element.

Elements are added to the end of the navigation order. Duplicate elements are ignored.

The first registered element is automatically focused.

pub fn register_all(&mut self, elements: impl IntoIterator<Item = T>)

Register multiple elements at once.

pub fn clear(&mut self)

Clear all registered elements and reset focus.

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

Get the currently focused element.

Returns None if no elements are registered.

pub fn current_index(&self) -> Option<usize>

Get the current focus index.

pub fn is_focused(&self, element: &T) -> bool

Check if an element is currently focused.

pub fn next(&mut self)

Move focus to the next element.

Wraps around to the first element after the last.

pub fn prev(&mut self)

Move focus to the previous element.

Wraps around to the last element before the first.

pub fn set(&mut self, element: T)

Set focus to a specific element.

If the element is not registered, focus is unchanged.

pub fn set_index(&mut self, index: usize)

Set focus by index.

If the index is out of bounds, focus is unchanged.

pub fn first(&mut self)

Focus the first element.

pub fn last(&mut self)

Focus the last element.

pub fn unfocus(&mut self)

Remove focus (no element focused).

pub fn has_focus(&self) -> bool

Check if any element has focus.

pub fn len(&self) -> usize

Get the number of registered elements.

pub fn is_empty(&self) -> bool

Check if no elements are registered.

pub fn elements(&self) -> &[T]

Get all registered elements.

pub fn remove(&mut self, element: &T) -> bool

Remove an element from the focus manager.

If the removed element was focused, focus moves to the next element (or previous if it was the last).

Trait Implementations

impl<T: Clone + Clone + Eq + Hash> Clone for FocusManager<T>

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

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug + Clone + Eq + Hash> Debug for FocusManager<T>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<T: Clone + Eq + Hash> Default for FocusManager<T>

fn default() -> Self

Returns the “default value” for a type.