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: Watcher.h 23// Author: Ingo Weinhold (bonefish@users.sf.net) 24// Description: A Watcher represents a target of a watching service. 25// A WatcherFilter represents a predicate on Watchers. 26//------------------------------------------------------------------------------ 27 28#ifndef WATCHER_H 29#define WATCHER_H 30 31#include <Messenger.h> 32 33// Watcher 34class Watcher { 35public: 36 Watcher(const BMessenger &target); 37 virtual ~Watcher(); 38 39 const BMessenger &Target() const; 40 41 virtual status_t SendMessage(BMessage *message); 42 43private: 44 BMessenger fTarget; 45}; 46 47// WatcherFilter 48class WatcherFilter { 49public: 50 WatcherFilter(); 51 virtual ~WatcherFilter(); 52 53 virtual bool Filter(Watcher *watcher, BMessage *message); 54}; 55 56#endif // WATCHER_H 57