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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 <vector>
00029 #include <utility>
00030 
00031 #if defined( _MSC_VER ) && ( _MSC_VER >= 1600 )
00032     #include <functional>
00033 #elif defined( CINDER_COCOA )
00034     #include <tr1/functional>
00035 #else
00036     #include <boost/tr1/functional.hpp>
00037 #endif
00038 namespace std {
00039     using std::tr1::function;
00040     using std::tr1::bind;
00041     using namespace std::tr1::placeholders;
00042 }
00043 
00044 namespace cinder {
00045 
00047 typedef uint32_t CallbackId;
00048 
00050 template<typename SIG>
00051 class CallbackMgr {
00052   public:
00053     typedef typename std::vector<std::pair<CallbackId,std::function<SIG> > >    collection;
00054     typedef typename collection::iterator                                       iterator;
00055     
00056     CallbackId  registerCb( std::function<SIG> cb )
00057     {
00058         CallbackId cbId = 0;
00059         if( ! mCallbacks.empty() )
00060             cbId = mCallbacks.rbegin()->first + 1;
00061         mCallbacks.push_back( std::make_pair( cbId, cb ) );
00062         return cbId;    
00063     }
00064 
00065     CallbackId  registerCb( iterator position, std::function<SIG> cb )
00066     {
00067         CallbackId cbId = 0;
00068         if( ! mCallbacks.empty() )
00069             cbId = mCallbacks.rbegin()->first + 1;
00070         mCallbacks.insert( position, std::make_pair( cbId, cb ) );
00071         return cbId;    
00072     }
00073 
00074     template<typename A1>
00075     void call( A1 a1 ) { for( iterator it = begin(); it != end(); ++it ) it->second( a1 ); }
00076     template<typename A1, typename A2>
00077     void call( A1 a1, A2 a2 ) { for( iterator it = begin(); it != end(); ++it ) it->second( a1, a2 ); }
00078     template<typename A1, typename A2, typename A3>
00079     void call( A1 a1, A2 a2, A3 a3 ) { for( iterator it = begin(); it != end(); ++it ) it->second( a1, a2, a3 ); }
00080     template<typename A1, typename A2, typename A3, typename A4>
00081     void call( A1 a1, A2 a2, A3 a3, A4 a4 ) { for( iterator it = begin(); it != end(); ++it ) it->second( a1, a2, a3, a4 ); }
00082     template<typename A1, typename A2, typename A3, typename A4, typename A5>
00083     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 ); }
00084     
00085     void    unregisterCb( CallbackId cbId ) { mCallbacks.erase( find( cbId ) ); }
00086     
00087     bool    empty() const { return mCallbacks.empty(); }
00088 
00089     iterator find( CallbackId cbId ) { for( iterator it = begin(); it != end(); ++it ) if( it->first == cbId ) return it; return mCallbacks.end(); }
00090     iterator begin() { return mCallbacks.begin(); }
00091     iterator end() { return mCallbacks.end(); }  
00092 
00093     collection&     getCallbacks() { return mCallbacks; }
00094 
00095   private:
00096     collection      mCallbacks;
00097 };
00098 
00099 } // namespace cinder