1 //------------------------------------------------------------------------------ 2 // Copyright (c) 2001-2002, Haiku 3 // 4 // Permission is hereby granted, free of charge, to any person obtaining a 5 // copy of this software and associated documentation files (the "Software"), 6 // to deal in the Software without restriction, including without limitation 7 // the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 // and/or sell copies of the Software, and to permit persons to whom the 9 // Software is furnished to do so, subject to the following conditions: 10 // 11 // The above copyright notice and this permission notice shall be included in 12 // all copies or substantial portions of the Software. 13 // 14 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 17 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 19 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 20 // DEALINGS IN THE SOFTWARE. 21 // 22 // File Name: WatchingService.h 23 // Author: Ingo Weinhold (bonefish@users.sf.net) 24 // Description: Features everything needed to provide a watching service. 25 //------------------------------------------------------------------------------ 26 27 #ifndef WATCHING_SERVICE_H 28 #define WATCHING_SERVICE_H 29 30 #include <map> 31 32 #include <Messenger.h> 33 34 class Watcher; 35 class WatcherFilter; 36 37 class WatchingService { 38 public: 39 WatchingService(); 40 virtual ~WatchingService(); 41 42 bool AddWatcher(Watcher *watcher); 43 bool AddWatcher(const BMessenger &target); 44 bool RemoveWatcher(Watcher *watcher, bool deleteWatcher = true); 45 bool RemoveWatcher(const BMessenger &target, bool deleteWatcher = true); 46 47 void NotifyWatchers(BMessage *message, WatcherFilter *filter = NULL); 48 49 private: 50 typedef std::map<BMessenger,Watcher*> watcher_map; 51 52 private: 53 watcher_map fWatchers; 54 }; 55 56 #endif // WATCHING_SERVICE_H 57