private void RootCanvas_OnMouseMove(object sender, MouseEventArgs e)
{
var clickPosition = e.GetPosition(RootCanvas);
var pointNearby = Contour?.Any(p => p.DistanceTo(clickPosition) < (12 / Scale)) ?? false;
Cursor = pointNearby ? Cursors.SizeAll : Cursors.Arrow;
if (ActivePointIndex != null)
{
Contour[ActivePointIndex.Value] = e.GetPosition(RootCanvas);
}
}
