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/***************************************************************************
* pythonfunction.h
* This file is part of the KDE project
* copyright (C)2006 by Sebastian Sauer (mail@dipe.org)
*
* Parts of the code are from kjsembed4 SlotProxy
* Copyright (C) 2005, 2006 KJSEmbed Authors.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
* This program 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
* Library General Public License for more details.
* You should have received a copy of the GNU Library General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
***************************************************************************/
#ifndef KROSS_PYTHONFUNCTION_H
#define KROSS_PYTHONFUNCTION_H
#include "pythonconfig.h"
#include <kross/core/krossconfig.h>
#include <kross/core/metafunction.h>
#include <QObject>
#include <QMetaObject>
#include <QMetaMethod>
#include <QByteArray>
namespace Kross {
/**
* The PythonFunction class implements a QObject to provide
* an adaptor between Qt signals+slots and python functions.
*/
class PythonFunction : public MetaFunction
{
public:
/**
* Constructor.
*
* \param sender The QObject instance that sends the signal.
* \param signal The signature of the signal the QObject emits.
* \param callable The callable python function that should
* be executed if the QObject emits the signal.
*/
PythonFunction(QObject* sender, const QByteArray& signal, const Py::Callable& callable)
: MetaFunction(sender, signal), m_callable(callable)
{
#ifdef KROSS_PYTHON_FUNCTION_DEBUG
m_debuginfo = QString("sender=%1 [%2] signal=%3").arg(sender->objectName()).arg(sender->metaObject()->className()).arg(signal.constData());
krossdebug( QString("PythonFunction::Constructor: %1").arg(m_debuginfo) );
#endif
}
/**
* Destructor.
*/
virtual ~PythonFunction()
{
#ifdef KROSS_PYTHON_FUNCTION_DEBUG
krossdebug( QString("PythonFunction::Destructor: %1").arg(m_debuginfo) );
#endif
}
/**
* This method got called if a method this QObject instance
* defines should be invoked.
*/
int qt_metacall(QMetaObject::Call _c, int _id, void **_a)
{
_id = QObject::qt_metacall(_c, _id, _a);
//krossdebug(QString("PythonFunction::qt_metacall id=%1").arg(_id));
if(_id >= 0 && _c == QMetaObject::InvokeMetaMethod) {
switch(_id) {
case 0: {
// convert the arguments
QMetaMethod method = metaObject()->method( metaObject()->indexOfMethod(m_signature) );
QList<QByteArray> params = method.parameterTypes();
Py::Tuple args( params.size() );
int idx = 0;
foreach(QByteArray param, params) {
++idx;
int tp = QVariant::nameToType( param.constData() );
switch(tp) {
case QVariant::Invalid: // fall through
case QVariant::UserType: {
tp = QMetaType::type( param.constData() );
#ifdef KROSS_PYTHON_FUNCTION_DEBUG
krossdebug( QString("PythonFunction::qt_metacall: param=%1 metatypeId=%2").arg(param.constData()).arg(tp) );
#endif
if (tp == QMetaType::QObjectStar) {
QObject* obj = (*reinterpret_cast< QObject*(*)>( _a[idx] ));
//args[idx-1] = Py::asObject(new PythonExtension(obj, false));
args[idx-1] = Py::asObject(new PythonExtension(obj));
continue;
} else if (tp == qMetaTypeId<QWidget*>()) {
QWidget* obj = (*reinterpret_cast< QWidget*(*)>( _a[idx] ));
//args[idx-1] = Py::asObject(new PythonExtension(obj, false));
args[idx-1] = Py::asObject(new PythonExtension(obj));
continue;
}
} // fall through
default: {
QVariant v(tp, _a[idx]);
if( ! Kross::Manager::self().strictTypesEnabled() ) {
if( v.type() == QVariant::Invalid && QByteArray(param.constData()).endsWith("*") ) {
QObject* obj = (*reinterpret_cast< QObject*(*)>( _a[idx] ));
v.setValue( (QObject*) obj );
}
}
#ifdef KROSS_PYTHON_FUNCTION_DEBUG
krossdebug( QString("PythonFunction::qt_metacall argument param=%1 typeId=%2").arg(param.constData()).arg(tp) );
#endif
args[idx-1] = PythonType<QVariant>::toPyObject(v);
} break;
}
}
Py::Object result;
try {
// call the python function
result = m_callable.apply(args);
// set the returnvalue
m_tmpResult = PythonType<QVariant>::toVariant(result);
}
catch(Py::Exception& e) {
QStringList trace;
int lineno;
PythonInterpreter::extractException(trace, lineno);
#ifdef KROSS_PYTHON_FUNCTION_DEBUG
krosswarning( QString("PythonFunction::qt_metacall exception on line %1:\n%2 \n%3").arg(lineno).arg(Py::value(e).as_string().c_str()).arg(trace.join("\n")) );
#endif
PyErr_Print(); //e.clear();
return -1;
}
//_a[0] = Kross::MetaTypeVariant<QVariant>(d->tmpResult).toVoidStar();
_a[0] = &(m_tmpResult);
} break;
}
_id -= 1;
}
return _id;
}
private:
Py::Callable m_callable;
QVariant m_tmpResult;
#ifdef KROSS_PYTHON_FUNCTION_DEBUG
QString m_debuginfo;
#endif
};
}
#endif
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