Stetic.WidgetEditSession.OnSelectionChanged C# (CSharp) Метод

        void OnSelectionChanged(object ob, EventArgs a)
        {
            if (frontend != null) {
                bool canCut, canCopy, canPaste, canDelete;
                ObjectWrapper obj = ObjectWrapper.Lookup (widget.Selection);
                Stetic.Wrapper.Widget wrapper = obj as Stetic.Wrapper.Widget;
                IEditableObject editable = widget.Selection as IEditableObject;
                if (editable == null)
                    editable = obj as IEditableObject;
                if (editable != null) {
                    canCut = editable.CanCut;
                    canCopy = editable.CanCopy;
                    canPaste = editable.CanPaste;
                    canDelete = editable.CanDelete;
                }
                else {
                    canCut = canCopy = canPaste = canDelete = false;
                }

                frontend.NotifySelectionChanged (Component.GetSafeReference (obj), canCut, canCopy, canPaste, canDelete);
                if (SelectionChanged != null)
                    SelectionChanged (this, new Stetic.Wrapper.WidgetEventArgs (wrapper));
            }
        }