Struct HeaderSortState 

pub struct HeaderSortState {
    pub column: Option<usize>,
    pub ascending: bool,
}

UI sort state tracked per column-header click.

Unlike the lower-level SortState (which records which column and an enum direction), HeaderSortState uses a simple ascending: bool toggle and an Option<usize> for the active column, matching the UI interaction model (click to sort ascending, click again to reverse).

Use HeaderSortState::as_sort_state to convert into the algorithm-level SortState accepted by sort_indices.

Fields

column: Option<usize>

The column currently sorted, or None when unsorted.

ascending: bool

true for ascending, false for descending.

Implementations

impl HeaderSortState

pub fn new() -> Self

Create a new, unsorted HeaderSortState.

pub fn toggle(&mut self, col: usize)

Toggle the sort for col:

• If col is not currently sorted, sort it ascending.
• If col is currently sorted ascending, switch to descending.
• If col is currently sorted descending, clear the sort.

pub fn indicator(&self, col: usize) -> &'static str

Return the indicator symbol for col:

• "▲" if this column is sorted ascending
• "▼" if this column is sorted descending
• "" otherwise

pub fn as_sort_state(&self) -> Option<SortState>

Convert to the algorithm-level SortState for use with sort_indices. Returns None when unsorted.

Trait Implementations

impl Clone for HeaderSortState

fn clone(&self) -> HeaderSortState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HeaderSortState

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

Formats the value using the given formatter.

impl Default for HeaderSortState

fn default() -> HeaderSortState

Returns the “default value” for a type.