Struct SelectionState 

pub struct SelectionState<Id: SelectableId> {
    pub selected: Option<Id>,
    pub hovered: Option<Id>,
    pub bar_idx: Option<usize>,
    /* private fields */
}

Generic selection state for chart elements, parameterized by an ID type.

Tracks which element is selected, which is hovered, and the bar index where the selection occurred. Used by both series and indicator selection.

Fields

selected: Option<Id>

Currently selected element

hovered: Option<Id>

Currently hovered element (desktop only)

bar_idx: Option<usize>

Additional selection metadata (bar index, etc.)

Implementations

impl<Id: SelectableId> SelectionState<Id>

pub fn new() -> Self

Create new empty selection state.

pub fn select(&mut self, id: Id, bar_idx: Option<usize>)

Select an element.

pub fn deselect(&mut self)

Deselect all elements.

pub fn set_hovered(&mut self, id: Option<Id>)

Set hovered element.

pub fn is_selected(&self, id: Id) -> bool

Check if a specific element is selected.

pub fn is_hovered(&self, id: Id) -> bool

Check if a specific element is hovered.

pub fn has_selection(&self) -> bool

Check if any element is selected.

pub fn selected_id(&self) -> Option<Id>

Get the currently selected element ID.

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

Get the bar index where selection occurred.

pub fn is_empty(&self) -> bool

Check if selection state is empty (nothing selected or hovered).

pub fn clear(&mut self)

Clear all state (selected, hovered, bar_idx).

Trait Implementations

impl<Id: Clone + SelectableId> Clone for SelectionState<Id>

fn clone(&self) -> SelectionState<Id>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<Id: Debug + SelectableId> Debug for SelectionState<Id>

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

Formats the value using the given formatter.

impl<Id: SelectableId> Default for SelectionState<Id>

fn default() -> Self

Returns the “default value” for a type.