public class afisor_xt
    {
        System.Drawing.Graphics zona_des;
        int x0;
        int y0;
        int w;
        int h;
        double val_max;
        int nrv;
        public void desenez( Color culoare_contur)
        {
            zona_des.DrawRectangle(new Pen(culoare_contur), x0-1, y0-1, w+2, h+2);
        }
        public void sterg(Color culoare_fundal)
        {
            zona_des.FillRectangle(new SolidBrush(culoare_fundal), x0 + 1, y0 + 1, w - 2, h - 2);
        }
        public void setval(Color cul, double[] vals)
        {
            float val_v, val;
            val_v = 0;
            for (int i = 1; i < nrv; i++)
            {
                val = System.Convert.ToInt16(System.Convert.ToDouble(vals[i]) * (System.Convert.ToDouble(h) / System.Convert.ToDouble(val_max))); //scalare
                zona_des.DrawLine(new Pen(cul), x0 + (i - 1) * 10, y0 + h-val_v, x0 + i * 10, y0 + h-val);
                val_v = val;
            }
        }
        public afisor_xt(System.Drawing.Graphics desen, int pozx, int pozy, int nr_valori, int inaltime, double vmax)
        {
            zona_des = desen;
            x0 = pozx;
            y0 = pozy;
            w = nr_valori * 10;
            h = inaltime;
            nrv = nr_valori;
            val_max = vmax;
            desenez(Color.Blue);
        }
    }