PythonQtSignalReceiver.h

Go to the documentation of this file.

#ifndef _PYTHONQTSIGNALRECEIVER_H
#define _PYTHONQTSIGNALRECEIVER_H
 
/*
 *
 *  Copyright (C) 2010 MeVis Medical Solutions AG All Rights Reserved.
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library 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
 *  Lesser General Public License for more details.
 *
 *  Further, this software is distributed without any warranty that it is
 *  free of the rightful claim of any third person regarding infringement
 *  or the like.  Any license provided herein, whether implied or
 *  otherwise, applies only to this software file.  Patent licenses, if
 *  any, provided herein do not apply to combinations of this program with
 *  other software, or any other product whatsoever.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  Contact information: MeVis Medical Solutions AG, Universitaetsallee 29,
 *  28359 Bremen, Germany or:
 *
 *  http://www.mevis.de
 *
 */
 
//----------------------------------------------------------------------------------
//----------------------------------------------------------------------------------
 
#include "PythonQtPythonInclude.h"
 
#include "PythonQtSystem.h"
#include "PythonQtObjectPtr.h"
 
class PythonQtMethodInfo;
class PythonQtClassInfo;
 
 
class PYTHONQT_EXPORT PythonQtSignalTarget
{
public:
  PythonQtSignalTarget()
  {
    _signalId = -1;
    _methodInfo = nullptr;
    _slotId = -1;
  }
 
  PythonQtSignalTarget(int signalId, const PythonQtMethodInfo* methodInfo, int slotId, PyObject* callable)
  {
    _signalId = signalId;
    _slotId = slotId;
    _methodInfo = methodInfo;
    _callable = callable;
  };
 
  ~PythonQtSignalTarget() {};
 
  int signalId() const { return _signalId; }
 
  int slotId() const { return _slotId; }
 
  const PythonQtMethodInfo* methodInfo() const { return _methodInfo; }
 
  void call(void** arguments) const;
 
  bool isSame(int signalId, PyObject* callable) const;
 
  static PyObject* call(PyObject* callable, const PythonQtMethodInfo* methodInfo, void** arguments,
    bool skipFirstArgumentOfMethodInfo = false);
 
private:
  int _signalId;
  int _slotId;
  const PythonQtMethodInfo* _methodInfo;
  PythonQtSafeObjectPtr _callable;
};
 
 
class PythonQtSignalReceiverBase : public QObject
{
  Q_OBJECT
public:
  PythonQtSignalReceiverBase(QObject* obj)
    : QObject(obj) {};
};
 
 
class PythonQtSignalReceiver : public PythonQtSignalReceiverBase
{
 
public:
  PythonQtSignalReceiver(QObject* obj);
  ~PythonQtSignalReceiver() override;
 
  bool addSignalHandler(const char* signal, PyObject* callable);
 
  bool removeSignalHandler(const char* signal, PyObject* callable = nullptr);
 
  int qt_metacall(QMetaObject::Call c, int id, void** arguments) override;
 
private:
  int getSignalIndex(const char* signal);
 
  QObject* _obj;
  PythonQtClassInfo* _objClassInfo;
  int _slotCount;
  int _destroyedSignalCount;
  // linear list may get slow on multiple targets, but I think typically we have many objects and just a few signals
  QList<PythonQtSignalTarget> _targets;
 
  static int _destroyedSignal1Id;
  static int _destroyedSignal2Id;
};
 
#endif