Struct RowDragData 

pub struct RowDragData<T: 'static> {
    pub source: ViewId,
    pub rows: Vec<usize>,
    pub items: Option<Vec<T>>,
}

The public, generic drag payload every data-view row (or selected set) emits. It occupies the single typed slot of a [teksilo_core::drag_payload::DragPayload] and serves both audiences:

• the origin view’s own erased classifier reads source + rows to recognise a same-view reorder;
• a foreign consumer (another view’s custom ListDataSource, a DropTarget::accept_typed::<RowDragData<T>>(), or on_rows_received) reads items.

items is Some only when the origin view opted into export via .exportable(..) (which requires T: Clone); a plain .reorderable(true) drag carries items == None (nothing outside the origin could use it anyway), so a reorder-only view is never accidentally droppable elsewhere.

Fields

source: ViewId

Identity of the view that started the drag.

rows: Vec<usize>

The dragged rows as the origin view’s flat visible indices at drag-start, ascending. Informational (row count, app callbacks): the origin’s accept path resolves the dragged rows’ stable keys at drag-start and never re-reads these indices at hover/drop time — they go stale the moment the source reflows mid-drag (a spring-load auto-expand, a peer write). A foreign consumer should read items instead.

items: Option<Vec<T>>

Clones of the dragged items, rows-ordered. None for a reorder-only (non-exportable) drag.

Implementations

impl<T: 'static> RowDragData<T>

pub fn items(&self) -> Option<&[T]>

The dragged items, if this is an export drag (.exportable(..) was set on the origin). None for a reorder-only drag.

pub fn into_items(self) -> Option<Vec<T>>

Consume the payload for its items (avoids cloning on the receive side).

pub fn is_export(&self) -> bool

Whether this drag carries exportable items — i.e. the origin opted into .exportable(..). A foreign receiver should gate on this (a reorder-only payload has the same Rust type but carries nothing usable).

pub fn len(&self) -> usize

Number of dragged rows.

pub fn is_empty(&self) -> bool

Whether no rows are carried (never true for a real drag).

Trait Implementations

impl<T: Debug + 'static> Debug for RowDragData<T>

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

Formats the value using the given formatter.