PythonQtInstanceWrapper Struct Reference

a Python wrapper object for Qt objects and C++ objects (that are themselves wrapped by wrapper QObjects) More...

#include <PythonQtInstanceWrapper.h>

Public Member Functions
PyObject_HEAD PythonQtClassInfo *	classInfo ()
	the class information, this is set even if the _obj or _wrappedPtr is NULL to support typed NULL pointers More...
PythonQtDynamicClassInfo *	dynamicClassInfo ()
void	setQObject (QObject *object)
	set the QObject pointer More...
void	passOwnershipToCPP ()
	Passes the ownership of the wrapped object to C++. More...
void	passOwnershipToPython ()
	Passes the ownership to Python. More...

Public Attributes
QPointer< QObject >	_obj
	pointer to the wrapped Qt object or if _wrappedPtr is set, the Qt object that wraps the C++ Ptr More...
void *	_objPointerCopy
void *	_wrappedPtr
	optional C++ object Ptr that is wrapped by the above _obj More...
bool	_ownedByPythonQt
	flag that stores if the object is owned by pythonQt More...
bool	_useQMetaTypeDestroy
	stores that the owned object should be destroyed using QMetaType::destroy() More...
bool	_isShellInstance
	stores if the object is a shell instance More...
bool	_shellInstanceRefCountsWrapper
	stores if the shell instance (C++) owns the wrapper with its ref count More...

Detailed Description

a Python wrapper object for Qt objects and C++ objects (that are themselves wrapped by wrapper QObjects)

Definition at line 63 of file PythonQtInstanceWrapper.h.

Member Function Documentation

classInfo()

PyObject_HEAD PythonQtClassInfo* PythonQtInstanceWrapper::classInfo ( )

inline

the class information, this is set even if the _obj or _wrappedPtr is NULL to support typed NULL pointers

Definition at line 67 of file PythonQtInstanceWrapper.h.

  {  return ((PythonQtClassWrapper*)Py_TYPE(this))->_classInfo; }

dynamicClassInfo()

PythonQtDynamicClassInfo* PythonQtInstanceWrapper::dynamicClassInfo ( )

inline

Definition at line 70 of file PythonQtInstanceWrapper.h.

  { return ((PythonQtClassWrapper*)Py_TYPE(this))->_dynamicClassInfo; }

passOwnershipToCPP()

void PythonQtInstanceWrapper::passOwnershipToCPP ( )

inline

Passes the ownership of the wrapped object to C++.

Definition at line 80 of file PythonQtInstanceWrapper.h.

                            {
    // 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;
      }
    }
  }

References _isShellInstance, _ownedByPythonQt, and _shellInstanceRefCountsWrapper.

passOwnershipToPython()

void PythonQtInstanceWrapper::passOwnershipToPython ( )

inline

Passes the ownership to Python.

Definition at line 95 of file PythonQtInstanceWrapper.h.

                               {
    _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;
    }
  }

References _ownedByPythonQt, and _shellInstanceRefCountsWrapper.

setQObject()

void PythonQtInstanceWrapper::setQObject ( QObject *  object )

inline

set the QObject pointer

Definition at line 74 of file PythonQtInstanceWrapper.h.

                                   {
    _obj = object;
    _objPointerCopy = object;
  }

References _obj, and _objPointerCopy.

Member Data Documentation

_isShellInstance

bool PythonQtInstanceWrapper::_isShellInstance

stores if the object is a shell instance

Definition at line 124 of file PythonQtInstanceWrapper.h.

Referenced by passOwnershipToCPP().

_obj

QPointer<QObject> PythonQtInstanceWrapper::_obj

pointer to the wrapped Qt object or if _wrappedPtr is set, the Qt object that wraps the C++ Ptr

Definition at line 107 of file PythonQtInstanceWrapper.h.

Referenced by setQObject().

_objPointerCopy

void* PythonQtInstanceWrapper::_objPointerCopy

a copy of the _obj pointer, which is required because the wrapper needs to deregister itself via the _obj pointer, even when the QPointer<QObject> object was destroyed

Definition at line 110 of file PythonQtInstanceWrapper.h.

Referenced by setQObject().

_ownedByPythonQt

bool PythonQtInstanceWrapper::_ownedByPythonQt

flag that stores if the object is owned by pythonQt

Definition at line 118 of file PythonQtInstanceWrapper.h.

Referenced by passOwnershipToCPP(), passOwnershipToPython(), and PythonQtConvertListOfKnownClassToPythonList().

_shellInstanceRefCountsWrapper

bool PythonQtInstanceWrapper::_shellInstanceRefCountsWrapper

stores if the shell instance (C++) owns the wrapper with its ref count

Definition at line 127 of file PythonQtInstanceWrapper.h.

Referenced by passOwnershipToCPP(), and passOwnershipToPython().

_useQMetaTypeDestroy

bool PythonQtInstanceWrapper::_useQMetaTypeDestroy

stores that the owned object should be destroyed using QMetaType::destroy()

Definition at line 121 of file PythonQtInstanceWrapper.h.

_wrappedPtr

void* PythonQtInstanceWrapper::_wrappedPtr

optional C++ object Ptr that is wrapped by the above _obj

Definition at line 113 of file PythonQtInstanceWrapper.h.

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The documentation for this struct was generated from the following file:

• PythonQtInstanceWrapper.h