GetNeighbourFaces逻辑

1. class FilletRadiusDelegate: public QItemDelegate

2. class FilletRadiusModel: public QStandardItemModel

3. class DlgGetNeighborFaces: public QWidget, public Gui::SelectionObserver

4. class GetNeighborFacesDialog: public QDialog

5. class TaskGetNeighborFaces: public Gui::TaskView::TaskDialog