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#ifndef _PYTHONQTCONVERSION_H
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#define _PYTHONQTCONVERSION_H
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/*
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*
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* Copyright (C) 2006 MeVis Research GmbH All Rights Reserved.
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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 Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 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 GNU
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* Lesser General Public License for more details.
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*
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* Further, this software is distributed without any warranty that it is
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* free of the rightful claim of any third person regarding infringement
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* or the like. Any license provided herein, whether implied or
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* otherwise, applies only to this software file. Patent licenses, if
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* any, provided herein do not apply to combinations of this program with
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* other software, or any other product whatsoever.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Contact information: MeVis Research GmbH, Universitaetsallee 29,
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* 28359 Bremen, Germany or:
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*
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* http://www.mevis.de
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*
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*/
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//----------------------------------------------------------------------------------
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/*!
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// \file PythonQtConversion.h
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// \author Florian Link
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// \author Last changed by $Author: florian $
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// \date 2006-05
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*/
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//----------------------------------------------------------------------------------
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#include "PythonQt.h"
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#include "PythonQtMisc.h"
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#include "PythonQtClassInfo.h"
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#include "PythonQtMethodInfo.h"
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#include <QWidget>
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#include <QList>
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#include <vector>
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typedef PyObject* PythonQtConvertMetaTypeToPythonCB(const void* inObject, int metaTypeId);
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typedef bool PythonQtConvertPythonToMetaTypeCB(PyObject* inObject, void* outObject, int metaTypeId, bool strict);
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#define PythonQtRegisterListTemplateConverter(type, innertype) \
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{ int typeId = qRegisterMetaType<type<innertype> >(#type"<"#innertype">"); \
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PythonQtConv::registerPythonToMetaTypeConverter(typeId, PythonQtConvertPythonListToListOfValueType<type<innertype>, innertype>); \
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PythonQtConv::registerMetaTypeToPythonConverter(typeId, PythonQtConvertListOfValueTypeToPythonList<type<innertype>, innertype>); \
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}
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#define PythonQtRegisterToolClassesTemplateConverter(innertype) \
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PythonQtRegisterListTemplateConverter(QList, innertype); \
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PythonQtRegisterListTemplateConverter(QVector, innertype); \
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PythonQtRegisterListTemplateConverter(std::vector, innertype);
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// TODO: add QHash etc. here!
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//! a static class that offers methods for type conversion
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class PYTHONQT_EXPORT PythonQtConv {
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public:
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//! get a ref counted True or False Python object
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static PyObject* GetPyBool(bool val);
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//! converts the Qt parameter given in \c data, interpreting it as a \c info parameter, into a Python object,
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static PyObject* ConvertQtValueToPython(const PythonQtMethodInfo::ParameterInfo& info, const void* data);
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//! convert python object to Qt (according to the given parameter) and if the conversion should be strict (classInfo is currently not used anymore)
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static void* ConvertPythonToQt(const PythonQtMethodInfo::ParameterInfo& info, PyObject* obj, bool strict, PythonQtClassInfo* classInfo, void* alreadyAllocatedCPPObject = NULL);
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//! creates a data storage for the passed parameter type and returns a void pointer to be set as arg[0] of qt_metacall
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static void* CreateQtReturnValue(const PythonQtMethodInfo::ParameterInfo& info);
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//! converts QString to Python string (unicode!)
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static PyObject* QStringToPyObject(const QString& str);
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//! converts QStringList to Python tuple
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static PyObject* QStringListToPyObject(const QStringList& list);
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//! converts QStringList to Python list
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static PyObject* QStringListToPyList(const QStringList& list);
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//! get string representation of py object
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static QString PyObjGetRepresentation(PyObject* val);
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//! get string value from py object
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static QString PyObjGetString(PyObject* val) { bool ok; QString s = PyObjGetString(val, false, ok); return s; }
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//! get string value from py object
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static QString PyObjGetString(PyObject* val, bool strict, bool &ok);
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//! get bytes from py object
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static QByteArray PyObjGetBytes(PyObject* val, bool strict, bool &ok);
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//! get int from py object
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static int PyObjGetInt(PyObject* val, bool strict, bool &ok);
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//! get int64 from py object
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static qint64 PyObjGetLongLong(PyObject* val, bool strict, bool &ok);
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//! get int64 from py object
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static quint64 PyObjGetULongLong(PyObject* val, bool strict, bool &ok);
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//! get double from py object
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static double PyObjGetDouble(PyObject* val, bool strict, bool &ok);
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//! get bool from py object
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static bool PyObjGetBool(PyObject* val, bool strict, bool &ok);
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//! create a string list from python sequence
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static QStringList PyObjToStringList(PyObject* val, bool strict, bool& ok);
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//! convert python object to qvariant, if type is given it will try to create a qvariant of that type, otherwise
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//! it will guess from the python type
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static QVariant PyObjToQVariant(PyObject* val, int type = -1);
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//! convert QVariant from PyObject
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static PyObject* QVariantToPyObject(const QVariant& v);
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static PyObject* QVariantMapToPyObject(const QVariantMap& m);
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static PyObject* QVariantListToPyObject(const QVariantList& l);
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//! get human readable string from qvariant
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static QString qVariantToString(const QVariant& v);
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//! get human readable string from CPP object (when the metatype is known)
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static QString CPPObjectToString(int type, const void* data);
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//! register a converter callback from python to cpp for given metatype
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static void registerPythonToMetaTypeConverter(int metaTypeId, PythonQtConvertPythonToMetaTypeCB* cb) { _pythonToMetaTypeConverters.insert(metaTypeId, cb); }
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//! register a converter callback from cpp to python for given metatype
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static void registerMetaTypeToPythonConverter(int metaTypeId, PythonQtConvertMetaTypeToPythonCB* cb) { _metaTypeToPythonConverters.insert(metaTypeId, cb); }
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//! returns the inner type id of a simple template of the form SomeObject<InnerType>
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static int getInnerTemplateMetaType(const QByteArray& typeName);
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//! converts the Qt parameter given in \c data, interpreting it as a \c type registered qvariant/meta type, into a Python object,
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static PyObject* ConvertQtValueToPythonInternal(int type, const void* data);
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public:
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static PythonQtValueStorage<qint64, 128> global_valueStorage;
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static PythonQtValueStorage<void*, 128> global_ptrStorage;
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static PythonQtValueStorage<QVariant, 32> global_variantStorage;
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protected:
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static QHash<int, PythonQtConvertMetaTypeToPythonCB*> _metaTypeToPythonConverters;
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static QHash<int, PythonQtConvertPythonToMetaTypeCB*> _pythonToMetaTypeConverters;
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//! converts the list of pointers of given type to Python
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static PyObject* ConvertQListOfPointerTypeToPythonList(QList<void*>* list, const QByteArray& type);
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//! tries to convert the python object to a QList of pointers to \c type objects, returns true on success
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static bool ConvertPythonListToQListOfPointerType(PyObject* obj, QList<void*>* list, const QByteArray& type, bool strict);
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//! cast wrapper to given className if possible
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static void* castWrapperTo(PythonQtInstanceWrapper* wrapper, const QByteArray& className, bool& ok);
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};
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template<class ListType, class T>
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PyObject* PythonQtConvertListOfValueTypeToPythonList(const void* /*QList<T>* */ inList, int metaTypeId)
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{
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ListType* list = (ListType*)inList;
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static const int innerType = PythonQtConv::getInnerTemplateMetaType(QByteArray(QMetaType::typeName(metaTypeId)));
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PyObject* result = PyTuple_New(list->size());
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int i = 0;
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foreach (const T& value, *list) {
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PyTuple_SET_ITEM(result, i, PythonQtConv::ConvertQtValueToPythonInternal(innerType, &value));
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i++;
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}
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return result;
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}
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template<class ListType, class T>
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bool PythonQtConvertPythonListToListOfValueType(PyObject* obj, void* /*QList<T>* */ outList, int metaTypeId, bool /*strict*/)
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{
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ListType* list = (ListType*)outList;
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static const int innerType = PythonQtConv::getInnerTemplateMetaType(QByteArray(QMetaType::typeName(metaTypeId)));
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bool result = false;
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if (PySequence_Check(obj)) {
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result = true;
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int count = PySequence_Size(obj);
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PyObject* value;
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for (int i = 0;i<count;i++) {
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value = PySequence_GetItem(obj,i);
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// this is quite some overhead, but it avoids having another large switch...
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QVariant v = PythonQtConv::PyObjToQVariant(value, innerType);
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if (v.isValid()) {
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list->push_back(qVariantValue<T>(v));
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} else {
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result = false;
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break;
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}
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}
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}
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return result;
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}
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#endif
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