/*=========================================================================

  Library:   CTK

  Copyright (c) Kitware Inc. 
  All rights reserved.
  Distributed under a BSD License. See LICENSE.txt file.

  This software is distributed "AS IS" WITHOUT ANY WARRANTY; without even
  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the above copyright notice for more information.

=========================================================================*/

#ifndef __ctkVTKConnection_h
#define __ctkVTKConnection_h

// Qt includes
#include <QObject>
#include <QVector>

// CTK includes
#include <ctkPimpl.h>

#include "CTKVisualizationVTKCoreExport.h"

class vtkObject;
class ctkVTKConnectionPrivate;

class CTK_VISUALIZATION_VTK_CORE_EXPORT ctkVTKConnection : public QObject
{
Q_OBJECT

public:
  typedef QObject Superclass;
  explicit ctkVTKConnection(QObject* parent);

  /// 
  virtual void printAdditionalInfo();
  QString shortDescription();
  static QString shortDescription(vtkObject* vtk_obj, unsigned long vtk_event,
    const QObject* qt_obj, QString qt_slot = "");

  /// 
  void SetParameters(vtkObject* vtk_obj, unsigned long vtk_event,
    const QObject* qt_obj, QString qt_slot, float priority);

  /// 
  /// Check the validity of the parameters. Parameters must be valid to add 
  /// a connection
  static bool ValidateParameters(vtkObject* vtk_obj, unsigned long vtk_event,
    const QObject* qt_obj, QString qt_slot);

  /// 
  /// Actually do the connection. Parameters must have been set prior to it
  /// Disconnecting (enable = false) removes the connection.
  void setEnabled(bool enable);
  bool isEnabled()const;

  /// 
  /// Temporarilly block any signals/slots. If the event is fired, the slot
  /// won't be called. You can restore the connection by calling SetBlocked
  /// with block = false.
  void setBlocked(bool block);
  bool isBlocked()const;

  /// 
  bool isEqual(vtkObject* vtk_obj, unsigned long vtk_event,
               const QObject* qt_obj, QString qt_slot)const;

  /// 
  /// Return a string uniquely identifying the connection within the current process
  QString id()const;
public slots:
  ///
  /// Safe deletion
  void deleteConnection();

signals:
  /// 
  /// The qt signal emited by the VTK Callback
  /// The signal corresponding to the slot will be emited
  void emitExecute(vtkObject* caller, vtkObject* call_data);

  /// Note: even if the signal has a signature with 4 args, you can
  /// connect it to a slot with less arguments as long as the types of the 
  /// argument are matching:
  /// connect(obj1,SIGNAL(signalFunc(A,B,C,D)),obj2,SLOT(slotFunc(A)));
  void emitExecute(vtkObject* caller, void* call_data, unsigned long vtk_event, void* client_data);
protected:
  virtual ~ctkVTKConnection();

private:
  CTK_DECLARE_PRIVATE(ctkVTKConnection);
};

#endif