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include/cinder/Function.h

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00001 /*
00002  Copyright (c) 2010, The Cinder Project (http://libcinder.org)
00003  All rights reserved.
00004 
00005  Redistribution and use in source and binary forms, with or without modification, are permitted provided that
00006  the following conditions are met:
00007 
00008     * Redistributions of source code must retain the above copyright notice, this list of conditions and
00009     the following disclaimer.
00010     * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and
00011     the following disclaimer in the documentation and/or other materials provided with the distribution.
00012 
00013  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
00014  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
00015  PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
00016  ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
00017  TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00018  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00019  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
00020  POSSIBILITY OF SUCH DAMAGE.
00021 */
00022 
00023 #pragma once
00024 
00025 #include "cinder/Cinder.h"
00026 
00027 #include <algorithm>
00028 #include <map>
00029 
00030 #if defined( _MSC_VER ) && ( _MSC_VER >= 1600 )
00031     #include <functional>
00032 #else
00033     #include <boost/tr1/functional.hpp>
00034 #endif
00035 namespace std {
00036     using std::tr1::function;
00037 }
00038 
00039 namespace cinder {
00040 
00042 typedef uint32_t CallbackId;
00043 
00045 template<typename SIG>
00046 class CallbackMgr {
00047   private:
00048     std::map<CallbackId,std::function<SIG> >        mCallbacks; 
00049 
00050   public:
00051     typedef typename std::map<CallbackId,std::function<SIG> >::iterator     iterator;
00052     
00053     CallbackId  registerCb( std::function<SIG> cb )
00054     {
00055         CallbackId cbId = 0;
00056         if( ! mCallbacks.empty() )
00057             cbId = mCallbacks.rbegin()->first + 1;
00058         mCallbacks[cbId] = cb;
00059         return cbId;    
00060     }
00061 
00062     template<typename A1>
00063     void call( A1 a1 ) { for( iterator it = begin(); it != end(); ++it ) it->second( a1 ); }
00064     template<typename A1, typename A2>
00065     void call( A1 a1, A2 a2 ) { for( iterator it = begin(); it != end(); ++it ) it->second( a1, a2 ); }
00066     template<typename A1, typename A2, typename A3>
00067     void call( A1 a1, A2 a2, A3 a3 ) { for( iterator it = begin(); it != end(); ++it ) it->second( a1, a2, a3 ); }
00068     template<typename A1, typename A2, typename A3, typename A4>
00069     void call( A1 a1, A2 a2, A3 a3, A4 a4 ) { for( iterator it = begin(); it != end(); ++it ) it->second( a1, a2, a3, a4 ); }
00070     template<typename A1, typename A2, typename A3, typename A4, typename A5>
00071     void call( A1 a1, A2 a2, A3 a3, A4 a4, A5 a5 ) { for( iterator it = begin(); it != end(); ++it ) it->second( a1, a2, a3, a4, a5 ); }
00072     
00073     void    unregisterCb( CallbackId cbId ) { mCallbacks.erase( cbId ); }
00074     
00075     bool    empty() const { return mCallbacks.empty(); }
00076     
00077     iterator begin() { return mCallbacks.begin(); }
00078     iterator end() { return mCallbacks.end(); }  
00079 };
00080 
00081 } // namespace cinder