Struct ColumnDef 

pub struct ColumnDef<'a, T: TreeModel> { /* private fields */ }

A column definition. Exactly one column in a set must have the tree role.

Implementations

impl<'a, T: TreeModel> ColumnDef<'a, T>

pub fn tree(header: impl Into<Line<'a>>, width: ColumnWidth) -> Self

Creates the primary tree column.

pub fn data<R>( header: impl Into<Line<'a>>, width: ColumnWidth, renderer: R, ) -> Self

where R: TreeCellRenderer<T> + 'a,

Creates an additional column whose renderer may borrow model data without allocation.

Function items and custom TreeCellRenderer implementations can return cells tied to the model borrow. Use Self::data_owned for an ergonomic capturing closure.

pub fn data_owned<R>( header: impl Into<Line<'a>>, width: ColumnWidth, renderer: R, ) -> Self

where R: Fn(&T, T::Id, &TreeRowContext<'_>) -> Cell<'static> + 'a,

Creates an additional column from a capturing closure that returns an owned cell.

Use Self::data when the returned cell borrows model data. This variant is convenient for closures that capture formatting configuration and produce owned text.