private void pictureBoxGraph_MouseMove(object sender, MouseEventArgs e)
{
PointF p = graphDrawer.GetMouseLocation(e.Location, false);
lblMousePosition.Text = "x = " + Math.Round(p.X, 3) + "\ny = " + Math.Round(p.Y, 3);
if (e.Button == System.Windows.Forms.MouseButtons.Left)
{
graphDrawer.Move(-(e.X - MouseDownLocation.X) / 20, (e.Y - MouseDownLocation.Y) / 20);
}
}
