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// This contains the definition of the PyQtProxy class.
//
// Copyright (c) 2015 Riverbank Computing Limited <info@riverbankcomputing.com>
//
// This file is part of PyQt4.
//
// 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_PYQTPROXY_H
#define _QPYCORE_PYQTPROXY_H
#include <Python.h>
#include <QByteArray>
#include <QMultiHash>
#include <QList>
#include <QMetaObject>
#include <QObject>
#include "qpycore_chimera.h"
#include "qpycore_namespace.h"
#include "qpycore_pyqtboundsignal.h"
#include "qpycore_sip.h"
#include "qpycore_types.h"
QT_BEGIN_NAMESPACE
class QMutex;
QT_END_NAMESPACE
class PyQt_PyObject;
// This class is used as a signal on behalf of Python signals and as 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 signal or slot. This requires some knowledge
// of the internal implementation of signals and slots but it is likely that
// they will only change between major Qt versions.
class PyQtProxy : public QObject
{
public:
// The different roles a proxy can fulfill. It might have been better to
// implement each as a sub-class.
enum ProxyType {
ProxySlot,
ProxySignal,
};
PyQtProxy(QObject *tx, const char *sig);
PyQtProxy(sipWrapper *txObj, const char *sig, PyObject *rxObj,
const char *slot, const char **member, int flags);
PyQtProxy(qpycore_pyqtBoundSignal *bs, PyObject *rxObj,
const char **member);
~PyQtProxy();
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);
static PyObject *invokeSlot(const qpycore_slot &slot, void **qargs,
int no_receiver_check = 0);
void disable();
int getReceivers(const char *signal) const {return receivers(signal);}
static void deleteSlotProxies(void *tx, const char *sig);
static PyQtProxy *findSlotProxy(void *tx, const char *sig, PyObject *rxObj,
const char *slot, const char **member);
void disableReceiverCheck();
// The type of a proxy hash.
typedef QMultiHash<void *, PyQtProxy *> ProxyHash;
// Each proxy type is held in a different hash.
static ProxyHash proxy_slots;
static ProxyHash proxy_signals;
// The mutex around the proxies hashes.
static QMutex *mutex;
// The proxy type.
ProxyType type;
// The proxy flags.
int proxy_flags;
// The normalised signature.
QByteArray signature;
// Set if the proxy is in a hash.
bool hashed;
// The QObject transmitter we are proxying for (if any).
QObject *transmitter;
// The slot we are proxying for. (Only used when type is ProxySlot.)
qpycore_slot real_slot;
// The last QObject sender.
static QObject *last_sender;
private:
void init(QObject *qtx, ProxyHash *hash, void *key);
void remove();
// This object's key in the relevant hash.
void *saved_key;
// The meta-object.
const QMetaObject *meta_object;
PyQtProxy(const PyQtProxy &);
PyQtProxy &operator=(const PyQtProxy &);
};
// This acts as a proxy for short-circuit signals. The parent is the object we
// are proxying for. The object name is the name of the signal.
class PyQtShortcircuitSignalProxy : public QObject
{
Q_OBJECT
public:
PyQtShortcircuitSignalProxy(QObject *parent);
int getReceivers(const char *signal) const {return receivers(signal);}
void emit_signal(const PyQt_PyObject &args) {emit pysignal(args);}
static PyQtShortcircuitSignalProxy *find(QObject *tx, const char *sig);
static PyQtShortcircuitSignalProxy *shortcircuitSignal(QObject *obj);
signals:
void pysignal(const PyQt_PyObject &);
private:
static bool no_shortcircuit_signals;
};
#endif
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