Hi Sebastian, the problem is that you create the predicates like "notBinary" or "isImage" on the stack with the consequence that they are deleted right after the function ends. And because you store references to this "ghost" objects in "completePredicate", the program crashes. This is apparently no problem with the predicate classes themselves but with their memory management. The documentation says that they are volatile objects which should be instantiated, used and then thrown away. However, this is not possible for the QmitkDataStorageComboBox-class because it has to save the predicate as a pointer in order to decide if a new data node should show up in the combobox or not. We discussed this recently and decided to change the memory management of the predicate classes by either using the itk::SmartPointer-concept or by providing a manual memory management. We let you know about this soon.
Regards, Michael -----Ursprüngliche Nachricht----- Von: sebastian ordas [mailto:[email protected]] Gesendet: Samstag, 11. April 2009 16:59 An: [email protected] Betreff: [mitk-users] setting a more complete predicate toQmitkDataStorageBox Hi team, How can I set a more complete predicate to QmitkDataStorageBox? The method "SetPredicate" accepts a mitk::NodePredicateBase* and works fine with e.g. SetPredicate( new mitk::NodePredicateDataType("Image") ); But the point comes when trying build a more complete predicate, such as: mitk::BoolProperty::Pointer myProp = mitk::BoolProperty::New(true); mitk::NodePredicateProperty isBinary("binary", myProp); mitk::NodePredicateNOT notBinary(isBinary); mitk::NodePredicateDataType isImage("Image"); mitk::NodePredicateAND completePredicate( notBinary, isImage ); how can I input "completePredicate" into QmitkDataStorageBox? If I set it as: m_TreeNodeSelector->SetPredicate( (mitk::NodePredicateBase*) new mitk::NodePredicateAND( notBinary, isImage ) ); the program crushes when it is loaded an image that is not binary any clue? thanks sebastian ------------------------------------------------------------------------------ This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com _______________________________________________ mitk-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/mitk-users ------------------------------------------------------------------------------ This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com _______________________________________________ mitk-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/mitk-users
