22fa3b3922
FreeCADs property system utilises some pointer math to calculate the offset between property and base class. Due to virtual inheritance of th ePropertyContainer the memory layout has been changed to rather random, which has lead to crashes dependend on the order of object initialisation. The solution is to not make PropertyContaner virtual but a class below, Base::Persitance. Then the memory layout is random for Persistance, but it is perfectly aligned for the base class chains from PropertyContainer onwards as well as from Extension onwards. Hence the proeprty system was changed to take the offset always from those two.
80 lines
3.4 KiB
C++
80 lines
3.4 KiB
C++
/***************************************************************************
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* Copyright (c) Alexander Golubev (Fat-Zer) <fatzer2@gmail.com> 2015 *
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* *
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* This file is part of the FreeCAD CAx development system. *
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* *
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* This library is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU Library General Public *
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* License as published by the Free Software Foundation; either *
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* version 2 of the License, or (at your option) any later version. *
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* *
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* This library is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU Library General Public License for more details. *
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* *
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* You should have received a copy of the GNU Library General Public *
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* License along with this library; see the file COPYING.LIB. If not, *
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* write to the Free Software Foundation, Inc., 59 Temple Place, *
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* Suite 330, Boston, MA 02111-1307, USA *
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* *
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***************************************************************************/
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#ifndef ORIGINGROUP_H_QHTU73IF
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#define ORIGINGROUP_H_QHTU73IF
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#include "GeoFeatureGroupExtension.h"
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#include "PropertyLinks.h"
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namespace App {
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class Origin;
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/**
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* Represents an abstact placeable group of objects with an associated Origin
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*/
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class AppExport OriginGroupExtension : public App::GeoFeatureGroupExtension
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{
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EXTENSION_PROPERTY_HEADER(App::OriginGroupExtension);
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public:
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OriginGroupExtension ();
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virtual ~OriginGroupExtension ();
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/// Returns the origin link or throws an exception
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App::Origin *getOrigin () const;
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/// returns the type name of the ViewProvider
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virtual const char* getViewProviderName () const {
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return "Gui::ViewProviderOriginGroup";
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}
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/**
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* Returns the origin group which contains this object.
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* In case this object is not part of any geoFeatureGroup 0 is returned.
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* @param obj the object to search for
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* @param indirect if true return if the group that so-called geoHas the object, @see geoHasObject()
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* default is true
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*/
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static DocumentObject* getGroupOfObject (const DocumentObject* obj, bool indirect=true);
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/// Returns true on changing OriginFeature set
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virtual short extensionMustExecute () override;
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/// Origin linked to the group
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PropertyLink Origin;
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protected:
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/// Checks integrity of the Origin
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virtual App::DocumentObjectExecReturn *extensionExecute () override;
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/// Creates the corresponding Origin object
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virtual void onExtendedSetupObject () override;
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/// Removes all planes and axis if they are still linked to the document
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virtual void onExtendedUnsetupObject () override;
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};
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typedef ExtensionPythonT<GroupExtensionPythonT<OriginGroupExtension>> OriginGroupExtensionPython;
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} /* App */
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#endif /* end of include guard: ORIGINGROUP_H_QHTU73IF */
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