Struct TableIndex 

pub struct TableIndex { /* private fields */ }

Memoised sort-and-filter index to avoid recomputing expensive permutations on every frame.

The dirty flags track whether the cached index is still valid. Call TableIndex::invalidate_sort after a sort-order change and TableIndex::invalidate_filter after a filter change (sorting a different column also implicitly invalidates the filter index).

Implementations

impl TableIndex

pub fn new() -> Self

Create a new, empty (dirty) TableIndex.

pub fn invalidate_sort(&mut self)

Mark the sort index (and consequently the filter index) as stale.

pub fn invalidate_filter(&mut self)

Mark only the filter index as stale (sort order is unchanged).

pub fn is_sort_dirty(&self) -> bool

Returns true if the sort index needs to be recomputed.

pub fn is_filter_dirty(&self) -> bool

Returns true if the filter index needs to be recomputed.

pub fn sort_index( &mut self, rows: &dyn RowSource, sort: &HeaderSortState, ) -> &[usize]

Return the current sort index, recomputing it if dirty.

The returned slice holds row indices in sorted order.

pub fn filter_index( &mut self, rows: &dyn RowSource, sort: &HeaderSortState, filters: &[ColumnFilter], ) -> &[usize]

Return the current filter index, recomputing it if dirty.

The returned slice holds a subset of the sort index that passes every active column filter.

Trait Implementations

impl Clone for TableIndex

fn clone(&self) -> TableIndex

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TableIndex

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

Formats the value using the given formatter.

impl Default for TableIndex

fn default() -> Self

Returns the “default value” for a type.