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-- File: IFSelect_SelectControl.cdl
-- Created: Wed Feb 16 10:07:01 1994
-- Author: Christian CAILLET
-- <cky@mastox>
---Copyright: Matra Datavision 1994
deferred class SelectControl from IFSelect inherits Selection
---Purpose : A SelectControl kind Selection works with two input Selections
-- in a dissymmetric way : the Main Input which gives an input
-- list of Entities, to be processed, and the Second Input which
-- gives another list, to be used to filter the main input.
--
-- e.g. : SelectDiff retains the items of the Main Input which
-- are not in the Control Input (which acts as Diff Input)
-- or a specific selection which retains Entities from the Main
-- Input if and only if they are concerned by an entity from
-- the Control Input (such as Views in IGES, etc...)
--
-- The way RootResult and Label are produced are at charge of
-- each sub-class
uses SelectionIterator
is
MainInput (me) returns mutable Selection;
---Purpose : Returns the Main Input Selection
HasSecondInput (me) returns Boolean;
---Purpose : Returns True if a Control Input is defined
-- Thus, Result can be computed differently if there is a
-- Control Input or if there is none
SecondInput (me) returns mutable Selection;
---Purpose : Returns the Control Input Selection, or a Null Handle
SetMainInput (me : mutable; sel : mutable Selection);
---Purpose : Sets a Selection to be the Main Input
SetSecondInput (me : mutable; sel : mutable Selection);
---Purpose : Sets a Selection to be the Control Input
-- RootResult,Label remain to be defined by each class of Selection
-- (also HasUniqueResult if it applies)
FillIterator (me; iter : in out SelectionIterator);
---Purpose : Puts in an Iterator the Selections from which "me" depends
-- That is to say, the list of Input Selections
fields
themain : Selection;
thesecond : Selection;
end SelectControl;
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