EditEventWindow.on_entry_time_changed C# (CSharp) Method

    private void on_entry_time_changed(object o, EventArgs args)
    {
        if(Util.IsNumber(entry_time_value.Text.ToString(), true)){
            entryTime = entry_time_value.Text.ToString();
            label_speed_value.Text = Util.TrimDecimals(
                    Util.GetSpeed (entryDistance, entryTime, metersSecondsPreferred) , pDN);
            button_accept.Sensitive = true;
        } else {
            button_accept.Sensitive = false;
            //entry_time_value.Text = "";
            //entry_time_value.Text = entryTime;
        }
    }