public class afis_xt
    {
        public System.Drawing.Graphics zona_des;
        public System.Drawing.Pen c_contur = new System.Drawing.Pen(System.Drawing.Color.Tomato, 2);
        int x0;
        int y0;
        int w;
        int h;
        double val_max;

        public void sterg(Color culoare_fundal)
        {
            zona_des.FillRectangle(new SolidBrush(culoare_fundal), x0 + 2, y0 + 2, w - 2, h - 2);
        }

        public void setval(Color culoare_grafic, double[] vals, int nrv)
        {
            int val_v, val;
            val_v = 0;
            for (int i = 0; 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(culoare_grafic), x0 + i, y0 + val_v, x0 + i+1, y0 + val);
                val_v = val;
            }
            zona_des.DrawRectangle(c_contur, x0 + 1, y0 + 1, w, h);
        }
        public afis_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;
            h = inaltime;
            val_max = vmax;
        }
    }