protected internal override void OnMouseMove(object sender, MouseEventArgs e)
{
base.OnMouseMove(sender, e);
_delta = Math.Sqrt((_position1.X - e.X) * (_position1.X - e.X) + (_position1.Y - e.Y) * (_position1.Y - e.Y));
if (_delta >= 10 && InUse)
{
_position2 = new PointF(e.X / canvas.ZoomFactor, e.Y / canvas.ZoomFactor);
if (base.canvas.SnapToGrid)
{
var cellsize = (int)(canvas.GridCellSize / canvas.ZoomFactor);
int newX = (int)Math.Round((double)(_position2.X / cellsize)) * cellsize;
int newY = (int)Math.Round((double)(_position2.Y / cellsize)) * cellsize;
_position2 = new PointF(newX, newY);
}
Boundary bounds = new Boundary(_position1, _position2);
_shape = Shapes.Clone <T>(bounds);
canvas.Invalidate();
}
}