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#ifndef _PYTHONQTOBJECTPTR_H
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#define _PYTHONQTOBJECTPTR_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 PythonQtObjectPtr.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 <Python.h>
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#include "PythonQtSystem.h"
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#include <QVariant>
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#include <QVariantList>
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//! a smart pointer that stores a PyObject pointer and that handles reference counting automatically
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class PYTHONQT_EXPORT PythonQtObjectPtr
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{
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public:
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PythonQtObjectPtr():_object(NULL) {}
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PythonQtObjectPtr(const PythonQtObjectPtr &p):_object(NULL) {
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setObject(p.object());
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}
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//! If the given variant holds a PythonQtObjectPtr, extract the value from it and hold onto the reference. This results in an increment of the reference count.
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PythonQtObjectPtr(const QVariant& variant):_object(NULL) {
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fromVariant(variant);
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}
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PythonQtObjectPtr(PyObject* o) {
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_object = o;
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if (o) Py_INCREF(_object);
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}
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~PythonQtObjectPtr() { if (_object) Py_DECREF(_object); }
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//! If the given variant holds a PythonQtObjectPtr, extract the value from it and hold onto the reference. This results in an increment of the reference count.
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bool fromVariant(const QVariant& variant);
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PythonQtObjectPtr &operator=(const PythonQtObjectPtr &p) {
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setObject(p.object());
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return *this;
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}
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PythonQtObjectPtr &operator=(PyObject* o) {
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setObject(o);
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return *this;
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}
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PythonQtObjectPtr &operator=(const QVariant& variant) {
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fromVariant(variant);
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return *this;
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}
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bool operator==( const PythonQtObjectPtr &p ) const {
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return object() == p.object();
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}
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bool operator!= ( const PythonQtObjectPtr& p ) const {
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return !( *this == p );
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}
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bool operator==( PyObject* p ) const {
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return object() == p;
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}
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bool operator!= ( PyObject* p ) const {
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return object() != p;
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}
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bool isNull() const { return !object(); }
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PyObject* operator->() const { return object(); }
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PyObject& operator*() const { return *( object() ); }
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operator PyObject*() const { return object(); }
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//! sets the object and passes the ownership (stealing the reference, in Python slang)
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void setNewRef(PyObject* o) {
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if (o != _object) {
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if (_object) Py_DECREF(_object);
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_object = o;
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}
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}
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PyObject* object() const {
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return _object;
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}
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//! evaluates the given script code in the context of this object and returns the result value
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QVariant evalScript(const QString& script, int start = Py_file_input);
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//! evaluates the given code and returns the result value (use Py_Compile etc. to create pycode from string)
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//! If pycode is NULL, a python error is printed.
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QVariant evalCode(PyObject* pycode);
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//! evaluates the given code in the context
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void evalFile(const QString& filename);
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//! add the given \c object to the \c module as a variable with \c name (it can be removed via clearVariable)
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void addObject(const QString& name, QObject* object);
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//! add the given variable to the module
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void addVariable(const QString& name, const QVariant& v);
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//! remove the given variable
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void removeVariable(const QString& name);
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//! get the variable with the \c name of the \c module, returns an invalid QVariant on error
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QVariant getVariable(const QString& name);
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//! call the given python object (in the scope of the current object), returns the result converted to a QVariant
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QVariant call(const QString& callable, const QVariantList& args = QVariantList());
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//! call the contained python object directly, returns the result converted to a QVariant
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QVariant call(const QVariantList& args = QVariantList());
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protected:
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void setObject(PyObject* o) {
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if (o != _object) {
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if (_object) Py_DECREF(_object);
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_object = o;
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if (_object) Py_INCREF(_object);
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}
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}
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private:
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PyObject* _object;
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};
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// register it to the meta type system
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Q_DECLARE_METATYPE(PythonQtObjectPtr)
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#endif
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