Define a Filter as a 2D diagram, Thus, in this diagram, dimension of every object will be based on theirs 2D size (see Object 2D properties)
For each type, define if corresponding objects will be
(1) Expanded in 2D Diagrams : objects is always expanded and we always see its children
(2) Has Own Diagram in 2D Diagrams : if property is checked, we can access to the children object by double clicking on object in the diagram, otherwise double click is used to define object size (to go in the object, we must double click on object name in the treeview)
(3) Frozen in 2D Diagrams : Objects is not selectable in the diagram. User can't change its positions or size graphically. (This option is available since
