Struct DriftState 

pub struct DriftState(/* private fields */);

Where a drift was last aimed, and when it last moved.

Shaped like ScrollbarState and owned by the view for the same reason: the element is rebuilt every frame and cannot remember where the pointer was. One per pane — two panes sharing one would take turns reading each other’s clock.

Implementations

impl DriftState

pub fn new() -> Self

pub fn aim(&self, pointer: Point<Pixels>)

Where the pointer is. Call it from the drag-move listener of the payload this pane should follow — that listener is typed, which is what keeps a board from drifting under somebody dragging a scrollbar thumb:

.on_drag_move(cx.listener(|this, event: &DragMoveEvent<CardDrag>, _, _| {
    this.drift.aim(event.event.position);
}))

Aimed rather than continuous: gpui reports a drag only while it moves, and a pointer parked at an edge is the case the whole thing exists for.

Trait Implementations

impl Clone for DriftState

fn clone(&self) -> DriftState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Default for DriftState

fn default() -> DriftState

Returns the “default value” for a type.