dragStart method

void dragStart(
  1. Offset position
)

Implementation

void dragStart(Offset position) {
  var item = items[dragData!.index]!;
  item.isDrag = true;
  var overlay = Overlay.of(context);
  overlayEntry = OverlayEntry(builder: dragData!.buildProxy);
  overlay.insert(overlayEntry!);
}