pqInterfaceTracker.h

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// SPDX-FileCopyrightText: Copyright (c) Kitware Inc.
// SPDX-FileCopyrightText: Copyright (c) Sandia Corporation
// SPDX-License-Identifier: BSD-3-Clause
#ifndef pqInterfaceTracker_h
#define pqInterfaceTracker_h

#include "pqCoreModule.h"
#include <QObject>

class vtkObject;

class PQCORE_EXPORT pqInterfaceTracker : public QObject
{
  Q_OBJECT
  typedef QObject Superclass;

public:
  pqInterfaceTracker(QObject* parent = nullptr);
  ~pqInterfaceTracker() override;

  QObjectList interfaces() const { return this->Interfaces + this->RegisteredInterfaces; }

  template <class T>
  QList<T> interfaces() const
  {
    QList<T> list;
    QObjectList objList = this->interfaces();
    Q_FOREACH (QObject* object, objList)
    {
      if (object && qobject_cast<T>(object))
      {
        list.push_back(qobject_cast<T>(object));
      }
    }
    return list;
  }

  void addInterface(QObject* iface);

  void removeInterface(QObject* iface);

  void initialize();
Q_SIGNALS:
  void interfaceRegistered(QObject* iface);

protected:
  void onPluginLoaded(vtkObject*, unsigned long, void* calldata);

  QObjectList Interfaces;
  QObjectList RegisteredInterfaces;
  unsigned long ObserverID;

private:
  Q_DISABLE_COPY(pqInterfaceTracker)
};

#endif