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1 | -- Created on: 1997-03-06 |
2 | -- Created by: Robert COUBLANC |
3 | -- Copyright (c) 1997-1999 Matra Datavision |
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4 | -- Copyright (c) 1999-2014 OPEN CASCADE SAS |
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5 | -- |
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6 | -- This file is part of Open CASCADE Technology software library. |
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7 | -- |
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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 |
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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. |
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13 | -- |
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14 | -- Alternatively, this file may be used under the terms of Open CASCADE |
15 | -- commercial license or contractual agreement. |
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16 | |
17 | class TypeFilter from AIS inherits Filter from SelectMgr |
18 | |
19 | ---Purpose: Selects Interactive Objects through their types. The |
20 | -- filter questions each Interactive Object in local context |
21 | -- to determine whether it has an non-null owner, and if |
22 | -- so, whether it is of the desired type. If the object |
23 | -- returns true in each case, it is kept. If not, it is rejected. |
24 | -- By default, the interactive object has a None type |
25 | -- and a signature of 0. A filter for type specifies a |
26 | -- choice of type out of a range at any level enumerated |
27 | -- for type or kind. The choice could be for kind of |
28 | -- interactive object, of dimension, of unit, or type of axis, |
29 | -- plane or attribute. |
30 | -- If you want to give a particular type and signature to |
31 | -- your Interactive Object, you must redefine two virtual |
32 | -- methods: Type and Signature. |
33 | -- This filter is used in both Neutral Point and open local contexts. |
34 | -- In the Collector viewer, you can only locate |
35 | -- Interactive Objects which answer positively to the |
36 | -- positioned filters when a local context is open. |
37 | -- Warning |
38 | -- When you close a local context, all temporary |
39 | -- interactive objects are deleted, all selection modes |
40 | -- concerning the context are cancelled, and all content |
41 | -- filters are emptied. |
42 | |
43 | uses |
44 | KindOfInteractive from AIS, |
45 | EntityOwner from SelectMgr |
46 | |
47 | is |
48 | Create(aGivenKind : KindOfInteractive from AIS) |
49 | returns mutable TypeFilter from AIS; |
50 | ---Purpose: Initializes filter for type, aGivenKind. |
51 | IsOk (me;anobj : EntityOwner from SelectMgr) |
52 | returns Boolean from Standard is redefined virtual; |
53 | ---Purpose: Returns False if the transient is not an Interactive |
54 | -- Object, or if the type of the Interactive Object is not |
55 | -- the same as that stored in the filter. |
56 | |
57 | fields |
58 | myKind : KindOfInteractive from AIS is protected; |
59 | |
60 | end TypeFilter; |