Struct ListReorder 

pub struct ListReorder {
    pub can_move: Rc<dyn Fn(usize, usize) -> i64>,
    pub move_row: Rc<dyn Fn(usize, usize)>,
}

The synchronous drag-to-reorder half of ListSource (docs/list.md). Both closures follow bind_row’s discipline: called on the UI thread from inside native drag callbacks, outside any day-core borrow, and they run to completion synchronously.

Fields

can_move: Rc<dyn Fn(usize, usize) -> i64>

May row from drop at row to? Called from the native validate/hover hook so the affordance (gap, insertion mark, forbidden cursor) reflects the app’s answer live. Returns the ACCEPTED target index — to itself to allow, another index to retarget the drop, or -1 to deny.

move_row: Rc<dyn Fn(usize, usize)>

Commit: row from dropped at row to (an index can_move accepted). Rotates Day’s row snapshot BEFORE returning — so len/token_at/bind_row reflect the new order while the native move animates — and defers the app’s own callback to the next event drain.

Trait Implementations

impl Clone for ListReorder

fn clone(&self) -> ListReorder

Returns a duplicate of the value.

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

Performs copy-assignment from source.