Enum Message 

#[non_exhaustive]
pub enum Message<Row> {
    BodyScrolled(AbsoluteOffset),
    Fetched {
        generation: u64,
        start: usize,
        rows: Vec<Row>,
    },
    RowPressed {
        index: usize,
    },
    RowHovered {
        index: usize,
    },
    RowUnhovered {
        index: usize,
    },
    ColumnResizing {
        index: usize,
        delta: f32,
    },
    ColumnResized {
        index: usize,
    },
    ColumnAutoSizeRequested {
        index: usize,
    },
    ScrollbarDragged(f32),
    ColumnMeasured {
        index: usize,
        width: f32,
    },
    HeaderPressed {
        index: usize,
    },
}

Messages the grid emits and consumes.

#[non_exhaustive]: new capabilities add variants, so match with a wildcard arm. Most integrations never match at all — they forward everything to VirtualGrid::update.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

BodyScrolled(AbsoluteOffset)

The body scrollable moved; carries its absolute offset (x and y).

Fetched

A fetch resolved: rows start at index start.

Fields

generation: u64

The fetch generation this result belongs to. Results from a superseded generation (an older scroll position or an older spec) are ignored instead of clobbering the window — the stale-fetch guard (a degenerate form of request coalescing).

start: usize

Index of the first fetched row.

rows: Vec<Row>

The fetched rows.

RowPressed

A body row was clicked; index is its position in the current order.

On update, a click on a fetched row single-selects it (Selection holds exactly that row) and moves keyboard focus to it; a click on a not-yet-fetched placeholder row does nothing. That is the whole v1 gesture policy — ctrl/shift multi-select gestures are unshipped (the underlying Selection is a set; drive multi-selection programmatically via selection_mut). To react to clicks yourself (master-detail panes), match this variant in your update before forwarding, or read selection/focus after forwarding.

Fields

index: usize

Positional index of the clicked row.

RowHovered

The cursor entered a body row (drives the hover highlight).

Fields

index: usize

Positional index of the hovered row.

RowUnhovered

The cursor left a body row.

Fields

index: usize

Positional index of the row the cursor left.

ColumnResizing

A column is being resized: delta px from the drag origin.

Fields

index: usize

Positional index of the column.

delta: f32

Pixel delta from the drag origin.

ColumnResized

A column resize ended; commit the width.

Fields

index: usize

Positional index of the column.

ColumnAutoSizeRequested

A resize grip was double-clicked: auto-size the column to its content.

Fields

index: usize

Positional index of the column.

ScrollbarDragged(f32)

The grid’s own vertical scrollbar (the min-thumb replacement for the scrollable’s hidden one) was dragged or rail-clicked to an absolute y offset.

ColumnMeasured

The phantom measurer reported a column’s natural content width (the widest of its header — including the sort indicator when sorted — visible cells, and footer, without cell padding).

Fields

index: usize

Positional index of the column.

width: f32

Measured natural width, px.

HeaderPressed

A sortable column’s header was clicked; toggle sorting by it.

Fields

index: usize

Positional index of the column.

Trait Implementations

impl<Row: Clone> Clone for Message<Row>

fn clone(&self) -> Message<Row>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<Row: Debug> Debug for Message<Row>

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

Formats the value using the given formatter.