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panda/src/event/event.h

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// Filename: event.h
// Created by:  drose (08Feb99)
//
////////////////////////////////////////////////////////////////////
//
// PANDA 3D SOFTWARE
// Copyright (c) 2001, Disney Enterprises, Inc.  All rights reserved
//
// All use of this software is subject to the terms of the Panda 3d
// Software license.  You should have received a copy of this license
// along with this source code; you will also find a current copy of
// the license at http://www.panda3d.org/license.txt .
//
// To contact the maintainers of this program write to
// panda3d@yahoogroups.com .
//
////////////////////////////////////////////////////////////////////

#ifndef EVENT_H
#define EVENT_H

#include <pandabase.h>

#include "eventParameter.h"

#include <typedReferenceCount.h>

class EventReceiver;

////////////////////////////////////////////////////////////////////
//       Class : Event
// Description : A named event, possibly with parameters.  Anyone in
//               any thread may throw an event at any time; there will
//               be one process responsible for reading and dispacting
//               on the events (but not necessarily immediately).
//
//               This function use to inherit from Namable, but that
//               makes it too expensive to get its name the Python
//               code.  Now it just copies the Namable interface in.
////////////////////////////////////////////////////////////////////
class EXPCL_PANDAEXPRESS Event : public TypedReferenceCount {
PUBLISHED:
  Event(const string &event_name, EventReceiver *receiver = NULL);
  Event(const Event &copy);
  void operator = (const Event &copy);
  ~Event();

  INLINE void set_name(const string &name);
  INLINE void clear_name();
  INLINE bool has_name() const;
  INLINE const string &get_name() const;

  void add_parameter(const EventParameter &obj);

  int get_num_parameters() const;
  EventParameter get_parameter(int n) const;

  bool has_receiver() const;
  EventReceiver *get_receiver() const;
  void set_receiver(EventReceiver *receiver);
  void clear_receiver();

  void output(ostream &out) const;

protected:
  typedef pvector<EventParameter> ParameterList;
  ParameterList _parameters;
  EventReceiver *_receiver;

private:
  string _name;

public:
  static TypeHandle get_class_type() {
    return _type_handle;
  }
  static void init_type() {
    TypedReferenceCount::init_type();
    register_type(_type_handle, "Event",
                  TypedReferenceCount::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 ostream &operator << (ostream &out, const Event &n);

#include "event.I"

#endif

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