void MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
_last = _start = _end = e.Location;
_moving = true;
if (_adding)
{
_adding = false;
_new = CreateAnnotation(new PointF(_start.X, _start.Y), new PointF(_end.X, _end.Y));
if (_new != null)
{
AddDrawing(_new);
}
}
else
{
Selection = HitTest(e.X, e.Y);
if (Selection != null)
{
Selection.MoveStart(e.X, e.Y);
}
}
}