private void showQuestionDefinition(Parser.Question q)
        {
            if (this.qUIDef == null)
                this.qUIDef = new QuestionUIDefinition();

            this.qUIDef.SetQuestion(q);
            this.qUIDef.Dock = DockStyle.Fill;

            this.pnlDefinition.Controls.Clear();
            this.pnlDefinition.Controls.Add(this.qUIDef);
        }