PythonQtInstanceWrapper.h

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#ifndef _PYTHONQTINSTANCEWRAPPER_H
#define _PYTHONQTINSTANCEWRAPPER_H
 
/*
 *
 *  Copyright (C) 2010 MeVis Medical Solutions AG All Rights Reserved.
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  Further, this software is distributed without any warranty that it is
 *  free of the rightful claim of any third person regarding infringement
 *  or the like.  Any license provided herein, whether implied or
 *  otherwise, applies only to this software file.  Patent licenses, if
 *  any, provided herein do not apply to combinations of this program with
 *  other software, or any other product whatsoever.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  Contact information: MeVis Medical Solutions AG, Universitaetsallee 29,
 *  28359 Bremen, Germany or:
 *
 *  http://www.mevis.de
 *
 */
 
//----------------------------------------------------------------------------------
//----------------------------------------------------------------------------------
 
#include "PythonQtPythonInclude.h"
 
#include "PythonQtSystem.h"
#include "PythonQtClassWrapper.h"
#include <QPointer>
 
#include "structmember.h"
#include "methodobject.h"
#include "compile.h"
#include "eval.h"
 
class PythonQtClassInfo;
class QObject;
 
extern PYTHONQT_EXPORT PyTypeObject PythonQtInstanceWrapper_Type;
 
//---------------------------------------------------------------
struct PythonQtInstanceWrapper {
  PyObject_HEAD
 
  inline PythonQtClassInfo* classInfo() 
  {  return ((PythonQtClassWrapper*)Py_TYPE(this))->_classInfo; }
 
  inline PythonQtDynamicClassInfo* dynamicClassInfo()
  { return ((PythonQtClassWrapper*)Py_TYPE(this))->_dynamicClassInfo; }
 
  void setQObject(QObject* object) {
    _obj = object;
    _objPointerCopy = object;
  }
 
  void passOwnershipToCPP() {
    // we pass the ownership to C++
    _ownedByPythonQt = false;
    // handle shell instance
    if (_isShellInstance) {
      if (!_shellInstanceRefCountsWrapper) {
        // ref count the wrapper, so that the Python part of the shell instance can not go
        // away until the C++ object gets deleted...
        Py_INCREF((PyObject*)this);
        _shellInstanceRefCountsWrapper = true;
      }
    }
  }
 
  void passOwnershipToPython() {
    _ownedByPythonQt = true;
    // if the shell instance was owned by C++ and the ownership goes to Python,
    // we need to remove the extra ref count that kept the Python part alive from the C++ side.
    if (_shellInstanceRefCountsWrapper) {
      Py_DECREF((PyObject*)this);
      _shellInstanceRefCountsWrapper = false;
    }
  }
 
 
  QPointer<QObject> _obj;
  void* _objPointerCopy;
 
  void*    _wrappedPtr;
 
  // TODO xxx: put booleans into int that holds flags
 
  bool _ownedByPythonQt;
 
  bool _useQMetaTypeDestroy;
 
  bool _isShellInstance;
 
  bool _shellInstanceRefCountsWrapper;
 
};
 
int PythonQtInstanceWrapper_init(PythonQtInstanceWrapper * self, PyObject * args, PyObject * kwds);
 
PyObject *PythonQtInstanceWrapper_delete(PythonQtInstanceWrapper * self);
 
#endif