/**
 * PANDA 3D SOFTWARE
 * Copyright (c) Carnegie Mellon University.  All rights reserved.
 *
 * All use of this software is subject to the terms of the revised BSD
 * license.  You should have received a copy of this license along
 * with this source code in a file named "LICENSE."
 *
 * @file callbackData.h
 * @author drose
 * @date 2009-03-13
 */

#ifndef CALLBACKDATA_H
#define CALLBACKDATA_H

#include "pandabase.h"
#include "typedObject.h"

/**
 * This is a generic data block that is passed along to a CallbackObject when
 * a callback is made.  It contains data specific to the particular callback
 * type in question.
 *
 * This is actually an abstract base class and contains no data.
 * Specializations of this class will contain the actual data relevant to each
 * callback type.
 */
class EXPCL_PANDA_PUTIL CallbackData : public TypedObject {
protected:
  INLINE CallbackData();

PUBLISHED:
  virtual void output(std::ostream &out) const;

  virtual void upcall();

public:
  static TypeHandle get_class_type() {
    return _type_handle;
  }
  static void init_type() {
    TypedObject::init_type();
    register_type(_type_handle, "CallbackData",
                  TypedObject::get_class_type());
  }
  virtual TypeHandle get_type() const {
    return get_class_type();
  }
  virtual TypeHandle force_init_type() {init_type(); return get_class_type();}

private:
  static TypeHandle _type_handle;
};

inline std::ostream &operator << (std::ostream &out, const CallbackData &cbd) {
  cbd.output(out);
  return out;
}

#include "callbackData.I"

#endif