public class termo
    {
        System.Drawing.Graphics zona_des;
        int x0;
        int y0;
        int w;
        int h;
        double val_max;
        double val_min;
        public void desenez(System.Drawing.Color culoare_contur, System.Drawing.Color culoare_valori)
        {
            System.Drawing.Pen creion_a = new System.Drawing.Pen(culoare_contur);
            System.Drawing.Pen creion_gr = new System.Drawing.Pen(Color.Gray);
            System.Drawing.SolidBrush pens_gr = new System.Drawing.SolidBrush(culoare_valori);
            System.Drawing.Font font_ni = new System.Drawing.Font("Nina", 8);
            zona_des.DrawRectangle(creion_a, x0, y0, w, h);
            for (int j = 0; j <= h; j += 5)// desenez gradatii
            {
                if (j % 25 == 0)
                {
                    zona_des.DrawLine(creion_gr, x0 + w + 2, y0 + j, x0 + w + 12, y0 + j);
                    zona_des.DrawString(System.Convert.ToString(Math.Round((val_max - j * (val_max - val_min) / h),2)), font_ni, pens_gr, x0 + w + 20, y0 + j - 7);
                }
                else
                {
                    zona_des.DrawLine(creion_gr, x0 + w + 2, y0 + j, x0 + w + 7, y0 + j);
                }
            }
        }
        public void setval(double val, System.Drawing.Color culoare_afisare, System.Drawing.Color culoare_radiera)
        {
            System.Drawing.SolidBrush pens_r = new System.Drawing.SolidBrush(culoare_afisare);
            System.Drawing.SolidBrush rad = new System.Drawing.SolidBrush(culoare_radiera);
            zona_des.FillRectangle(rad, x0 + 1, y0 + 1, w - 1, h - 1);
            if (val > val_max)
                val = val_max;
            if (val < val_min)
                val = val_min;
            val =(val - val_min) * (System.Convert.ToDouble(h) / (val_max - val_min)); //scalare 
            zona_des.FillRectangle(pens_r, x0 + 1, y0 + h - System.Convert.ToInt32(val), w - 1, System.Convert.ToInt32(val));
        }
        public termo(System.Drawing.Graphics desen, int pozx, int pozy, int lat, int inalt, double vmin, double vmax)
        {
            zona_des = desen;
            x0 = pozx;
            y0 = pozy;
            w = lat;
            h = inalt;
            val_max = vmax;
            val_min = vmin;
        }
    }