onPanUpdate method

void onPanUpdate(
  1. DragUpdateDetails details
)

Implementation

void onPanUpdate(DragUpdateDetails details) {
  RenderBox box = context.findRenderObject() as RenderBox;
  Offset newPoint = box.globalToLocal(details.globalPosition);
  //print(newPoint);
  setState(() {
    lines[lines.length - 1].path.add(newPoint);
  });
}