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
34class Watcher;
35class WatcherFilter;
36
37class WatchingService {
38public:
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
49private:
50	typedef std::map<BMessenger,Watcher*> watcher_map;
51
52private:
53	watcher_map	fWatchers;
54};
55
56#endif	// WATCHING_SERVICE_H
57