Struct GroupKey 

pub struct GroupKey<R: GridRow> { /* private fields */ }

Grouping by a function of the row rather than a column: a bucket of prices, the first letter of a name.

Implementations

impl<R: GridRow> GroupKey<R>

pub fn new( id: &'static str, depends_on: ColumnSet, key: impl Fn(&R) -> CellValue<'_> + Send + Sync + 'static, ) -> Self

A level keyed by key.

id names the level in group paths and must differ from every column id of the schema. depends_on lists the columns key reads; pass every column when unsure. key runs in the background, from several threads of a large rebuild, once or twice per row: it must not allocate, so it returns text borrowed from the row.

pub fn with_title(self, title: impl Into<Arc<str>>) -> Self

The level’s title in captions and the group panel; the id by default.

pub fn id(&self) -> &'static str

The level’s id.

pub fn title(&self) -> &str

The level’s title.

pub fn depends_on(&self) -> ColumnSet

The columns the key reads.

Trait Implementations

impl<R: GridRow> Clone for GroupKey<R>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<R: GridRow> Debug for GroupKey<R>

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

Formats the value using the given formatter.