1 -- Created on: 1992-11-18
2 -- Created by: Christian CAILLET
3 -- Copyright (c) 1992-1999 Matra Datavision
4 -- Copyright (c) 1999-2014 OPEN CASCADE SAS
6 -- This file is part of Open CASCADE Technology software library.
8 -- This library is free software; you can redistribute it and/or modify it under
9 -- the terms of the GNU Lesser General Public License version 2.1 as published
10 -- by the Free Software Foundation, with special exception defined in the file
11 -- OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
12 -- distribution for complete text of the license and disclaimer of any warranty.
14 -- Alternatively, this file may be used under the terms of Open CASCADE
15 -- commercial license or contractual agreement.
17 generic class SelectList from IFSelect (Entity as Transient)
21 ---Purpose : A SelectList kind Selection selects a part of an Entity, as
22 -- well as this Entity can be described as an ordered List.
23 -- That is to say, it must have two methods :
25 -- NbEntities (me) returns Integer;
26 -- Entity (me; num : Integer) returns Transient;
28 -- For each class of Entity for which we want to define a
29 -- SelectList, we will instanciate this class with the
30 -- desired class of Entity as definition parameter : the deferred
31 -- methods NbEntities and ListedEntity are now defined to call
32 -- the required methods from <Entity>
34 -- SelectList works as SelectInList, beeing a sub-class of it
36 uses AsciiString from TCollection, Transient, EntityIterator, IntParam
42 Create returns mutable SelectList;
43 ---Purpose : Creates a SelectList (with no limit);
45 KeepInputEntity (me; iter : in out EntityIterator);
46 ---Purpose : Keeps Input Entity, as having required type <Entity>
48 NbItems (me; ent : Transient) returns Integer;
49 ---Purpose : Returns count of Entities in the list in the Entity <ent>
50 -- by calling method NbEntity from parameter class Entity
52 ListedEntity (me; num : Integer; ent : Transient)
53 returns Transient raises OutOfRange;
54 ---Purpose : Returns an Entity of the list in the Entity <ent>, by calling
55 -- method Entity from parameter class Entity
56 -- Error if <ent> has not required type, or if <num> is not in
57 -- the right range (1,NbEntities),
59 ListLabel (me) returns AsciiString from TCollection;
60 ---Purpose : Returns the specific label for the list
61 -- then, following cases :
62 -- " From .. Until .." or "From .." or "Until .." or "Rank no .."
63 -- Warning : it is not possible to give a character constant to instantiate
64 -- a generic class, thus "List From Entity" is not adapted :
65 -- redefine Label if judged necessary