-- Created on: 1992-11-17 -- Created by: Christian CAILLET -- Copyright (c) 1992-1999 Matra Datavision -- Copyright (c) 1999-2012 OPEN CASCADE SAS -- -- The content of this file is subject to the Open CASCADE Technology Public -- License Version 6.5 (the "License"). You may not use the content of this file -- except in compliance with the License. Please obtain a copy of the License -- at http://www.opencascade.org and read it completely before using this file. -- -- The Initial Developer of the Original Code is Open CASCADE S.A.S., having its -- main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France. -- -- The Original Code and all software distributed under the License is -- distributed on an "AS IS" basis, without warranty of any kind, and the -- Initial Developer hereby disclaims all such warranties, including without -- limitation, any warranties of merchantability, fitness for a particular -- purpose or non-infringement. Please see the License for the specific terms -- and conditions governing the rights and limitations under the License. deferred class SelectDeduct from IFSelect inherits Selection ---Purpose : A SelectDeduct determines a list of Entities from an Input -- Selection, by a computation : Output list is not obliged to be -- a sub-list of Input list -- (for more specific, see SelectExtract for filtered sub-lists, -- and SelectExplore for recurcive exploration) -- -- A SelectDeduct may use an alternate input for one shot -- This allows to use an already existing definition, by -- overloading the input selection by an alternate list, -- already defined, for one use : -- If this alternate list is set, InputResult queries it instead -- of calling the input selection, then clears it immediately uses AsciiString from TCollection, EntityIterator, Graph, SelectionIterator, SelectPointed raises InterfaceError is SetInput (me : mutable; sel : mutable Selection); ---Purpose : Defines or Changes the Input Selection Input (me) returns mutable Selection; ---Purpose : Returns the Input Selection HasInput (me) returns Boolean; ---Purpose : Returns True if the Input Selection is defined, False else HasAlternate (me) returns Boolean; ---Purpose : Tells if an Alternate List has been set, i.e. : the Alternate -- Definition is present and set Alternate (me : mutable) returns SelectPointed; ---Purpose : Returns the Alternate Definition -- It is returned modifiable, hence an already defined -- SelectPointed can be used -- But if it was not yet defined, it is created the first time -- -- It is exploited by InputResult ---C++ : return & InputResult (me; G : Graph) returns EntityIterator; ---Purpose : Returns the Result determined by Input Selection, as Unique -- if Input Selection is not defined, returns an empty list. -- -- If Alternate is set, InputResult takes its definition instead -- of calling the Input Selection, then clears it -- RootResult remains to be defined by each class of Selection FillIterator (me; iter : in out SelectionIterator); ---Purpose : Puts in an Iterator the Selections from which "me" depends -- This list contains one Selection : the InputSelection fields thesel : Selection; thealt : SelectPointed; end SelectDeduct;