/indra/llcommon/lleventemitter.h
C++ Header | 102 lines | 47 code | 18 blank | 37 comment | 6 complexity | 8103e4954ca20c0c670b90a81a38f531 MD5 | raw file
Possible License(s): LGPL-2.1
- /**
- * @file lleventemitter.h
- * @brief General event emitter class
- *
- * $LicenseInfo:firstyear=2005&license=viewerlgpl$
- * Second Life Viewer Source Code
- * Copyright (C) 2010, Linden Research, Inc.
- *
- * 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;
- * version 2.1 of the License only.
- *
- * 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.
- *
- * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
- * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
- * $/LicenseInfo$
- */
- // header guard
- #ifndef LL_EVENTEMITTER_H
- #define LL_EVENTEMITTER_H
- // standard headers
- #include <algorithm>
- #include <typeinfo>
- #include <iostream>
- #include <string>
- #include <list>
- #include "stdtypes.h"
- ///////////////////////////////////////////////////////////////////////////////
- // templatized emitter class
- template < class T >
- class eventEmitter
- {
- public:
- typedef typename T::EventType EventType;
- typedef std::list< T* > ObserverContainer;
- typedef void ( T::*observerMethod )( const EventType& );
- protected:
- ObserverContainer observers;
- public:
- eventEmitter () { };
- ~eventEmitter () { };
- ///////////////////////////////////////////////////////////////////////////////
- //
- BOOL addObserver ( T* observerIn )
- {
- if ( ! observerIn )
- return FALSE;
- // check if observer already exists
- if ( std::find ( observers.begin (), observers.end (), observerIn ) != observers.end () )
- return FALSE;
- // save it
- observers.push_back ( observerIn );
- return true;
- };
- ///////////////////////////////////////////////////////////////////////////////
- //
- BOOL remObserver ( T* observerIn )
- {
- if ( ! observerIn )
- return FALSE;
- observers.remove ( observerIn );
- return TRUE;
- };
- ///////////////////////////////////////////////////////////////////////////////
- //
- void update ( observerMethod method, const EventType& msgIn )
- {
- typename std::list< T* >::iterator iter = observers.begin ();
- while ( iter != observers.end () )
- {
- ( ( *iter )->*method ) ( msgIn );
- ++iter;
- };
- };
- };
- #endif // lleventemitter_h