updateDragHandle method

void updateDragHandle(
  1. Offset focalPoint
)

Updates the drag handle offset.

Must call prepareDragHandle() first.

Cannot be called after finalizeDragHandle() has been called.

Implementation

void updateDragHandle(Offset focalPoint) {
  if (_dragging) {
    _dragHandleOffset = focalPoint - _dragHandleFocalPoint!;
  }
}