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// This contains the definition of the PyQtSlotProxy class.
//
// Copyright (c) 2018 Riverbank Computing Limited <info@riverbankcomputing.com>
//
// This file is part of PyQt5.
//
// This file may be used under the terms of the GNU General Public License
// version 3.0 as published by the Free Software Foundation and appearing in
// the file LICENSE included in the packaging of this file. Please review the
// following information to ensure the GNU General Public License version 3.0
// requirements will be met: http://www.gnu.org/copyleft/gpl.html.
//
// If you do not wish to use this file under the terms of the GPL version 3.0
// then you may purchase a commercial license. For more information contact
// info@riverbankcomputing.com.
//
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
#ifndef _QPYCORE_PYQTSLOTPROXY_H
#define _QPYCORE_PYQTSLOTPROXY_H
#include <Python.h>
#include <QByteArray>
#include <QMultiHash>
#include <QMetaObject>
#include <QObject>
#include "qpycore_namespace.h"
#include "qpycore_chimera.h"
QT_BEGIN_NAMESPACE
class QMutex;
QT_END_NAMESPACE
class PyQtSlot;
// This class is implements a slot on behalf of Python callables. It is
// derived from QObject but is not run through moc. Instead the normal
// moc-generated methods are handwritten in order to implement a universal
// slot. This requires some knowledge of the internal structure of QObject but
// it is likely that they will only change between major Qt versions.
class PyQtSlotProxy : public QObject
{
public:
PyQtSlotProxy(PyObject *slot, QObject *transmitter,
const Chimera::Signature *slot_signature, bool single_shot);
~PyQtSlotProxy();
static const QMetaObject staticMetaObject;
virtual const QMetaObject *metaObject() const;
virtual void *qt_metacast(const char *);
virtual int qt_metacall(QMetaObject::Call, int, void **);
void unislot(void **qargs);
void disable();
static void deleteSlotProxy(const QMetaObject::Connection *connection);
static void deleteSlotProxies(const QObject *transmitter,
const QByteArray &signal_signature);
static PyQtSlotProxy *findSlotProxy(const QObject *transmitter,
const QByteArray &signal_signature, PyObject *slot);
void disableReceiverCheck();
static int clearSlotProxies(const QObject *transmitter);
static int visitSlotProxies(const QObject *transmitter, visitproc visit,
void *arg);
static QObject *lastSender();
// The signature of the slot that receives connections.
static const QByteArray proxy_slot_signature;
// The mutex around the proxies hash.
static QMutex *mutex;
// The connection to the proxy.
QMetaObject::Connection connection;
private:
// The last QObject sender.
static QObject *last_sender;
// The type of a proxy hash.
typedef QMultiHash<const QObject *, PyQtSlotProxy *> ProxyHash;
// The hash of proxies.
static ProxyHash proxy_slots;
// The proxy flags.
int proxy_flags;
// The normalised signature.
QByteArray signature;
// The QObject transmitter the proxy will be connected to (if any).
const QObject *transmitter;
// The slot we are proxying for.
PyQtSlot *real_slot;
// The meta-object.
const QMetaObject *meta_object;
PyQtSlotProxy(const PyQtSlotProxy &);
PyQtSlotProxy &operator=(const PyQtSlotProxy &);
};
#endif
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