private void m_propertyGrid_PropertyValueChanging(object sender, DevComponents.DotNetBar.PropertyValueChangingEventArgs e)
        {
            Node n = m_propertyGrid.SelectedObject as Node;

            if (n == null)
            {
                return;
            }

            m_actChangeProperty = new Action_PropertyChange(n);
        }
        private void m_propertyGrid_PropertyValueChanged(object sender, PropertyChangedEventArgs e)
        {
            if (m_actChangeProperty != null)
            {
                m_actChangeProperty.ChangeCommitted();
                ActionQueue.Instance.PushAction(m_actChangeProperty);
                m_actChangeProperty = null;
            }

            if (PropertyValueChanged != null)
            {
                PropertyValueChanged();
            }
        }