Struct Body 

pub struct Body<'a> {
    pub rows: usize,
    pub selected: Option<&'a dyn Fn(usize) -> bool>,
    pub scroll_to: Option<usize>,
}

The body’s own facts for this frame: how many rows, which are selected, and which one to bring into view.

Held apart from TableStyle because none of it is style and none of it survives the frame: a row count changes when a folder does, a selection when the user clicks, and a scroll request exists for exactly one frame. Held apart from the Column slice because none of it is description either. The description says what a table is, and this says what it holds right now.

Both of the optional fields are here rather than left to the app because egui_extras answers them on a handle the app never sees: set_selected is a method on the row, and scroll_to_row a method on the builder, and this crate owns both. That is the same reason cell exists.

Fields

rows: usize

How many rows to draw.

selected: Option<&'a dyn Fn(usize) -> bool>

Whether a row is selected, by index.

A predicate rather than a set, so an app whose selection is a range, a bitmap or a single index does not have to build a collection to be asked. None is a table no row of which is selected, which is not the same claim as a predicate that always answers false and costs nothing to make.

scroll_to: Option<usize>

A row to bring into view this frame.

Set it from a request the app then clears, the way a keyboard cursor moving off-screen raises one: held rather than taken, it would fight every scroll the user makes with the mouse.

Trait Implementations

impl Debug for Body<'_>

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

Formats the value using the given formatter.

impl<'a> Default for Body<'a>

fn default() -> Body<'a>

Returns the “default value” for a type.