private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
        {
            Point point = new Point(e.X, e.Y);
            Node  node  = GraphicFunctions.ConvertToOwn(point);

            toolStripStatusLabel1.Text = "[ " + node.ToString() + " ]";
        }
 private void pictureBox1_MouseUp(object sender, MouseEventArgs e)
 {
     if (mode == ProgramMode.DrawMode)
     {
         Point point = new Point(e.X, e.Y);
         Node  node  = GraphicFunctions.ConvertToOwn(point);
         polygon.AddVertex(node);
         GraphicFunctions.DrawNode(node, g, false, 0);
         pictureBox1.Image = btm;
     }
 }