89bbb81521
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.
65 lines
2.9 KiB
C++
65 lines
2.9 KiB
C++
/***************************************************************************
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* Copyright (c) 2006 Werner Mayer <wmayer[at]users.sourceforge.net> *
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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 GUI_VIEWPROVIDERGROUPEXTENSION_H
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#define GUI_VIEWPROVIDERGROUPEXTENSION_H
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#include <App/Extension.h>
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#include "ViewProviderExtension.h"
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namespace Gui
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{
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class GuiExport ViewProviderGroupExtension : public ViewProviderExtension
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{
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EXTENSION_PROPERTY_HEADER(Gui::ViewProviderGroupExtension);
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public:
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/// Constructor
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ViewProviderGroupExtension(void);
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virtual ~ViewProviderGroupExtension();
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virtual std::vector<App::DocumentObject*> extensionClaimChildren(void)const override;
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virtual bool extensionCanDragObjects() const override;
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virtual bool extensionCanDragObject(App::DocumentObject*) const override;
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virtual void extensionDragObject(App::DocumentObject*) override;
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virtual bool extensionCanDropObjects() const override;
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virtual bool extensionCanDropObject(App::DocumentObject*) const override;
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virtual void extensionDropObject(App::DocumentObject*) override;
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virtual void extensionHide(void) override;
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virtual void extensionShow(void) override;
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virtual bool extensionOnDelete(const std::vector<std::string> &) override;
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private:
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bool visible; // helper variable
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std::vector<ViewProvider*> nodes;
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};
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typedef ViewProviderExtensionPythonT<Gui::ViewProviderGroupExtension> ViewProviderGroupExtensionPython;
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} //namespace Gui
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#endif // GUI_VIEWPROVIDERGROUPEXTENSION_H
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