private void Graph_FormClosed(object sender, FormClosedEventArgs e)
 {
     if (trc != null)
     {
         trc.Close();
         trc = null;
     }
 }
        public Graph(List <string> nodesList, List <string> edges, bool isSpain)
        {
            InitializeComponent();

            this.Size          = new Size(1200, 700);
            this.StartPosition = FormStartPosition.Manual;
            //this.Location = new Point(Form1.ActiveForm.Location.X + Form1.ActiveForm.Width, Form1.ActiveForm.Location.Y);
            this.FormBorderStyle = FormBorderStyle.FixedSingle;
            //this.Size = new Size(500, 450);

            gi  = new GraphInfo(nodesList, edges, isSpain);
            trc = new TransClose(nodesList, gi.matrix);
            trc.Show();
        }