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1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef CHROME_COMMON_DEPRECATED_EVENT_SYS_H_ | |
6 #define CHROME_COMMON_DEPRECATED_EVENT_SYS_H_ | |
7 #pragma once | |
8 | |
9 // TODO: This class should be removed or moved to Notifier code. | |
10 // See Bug 42450 (http://code.google.com/p/chromium/issues/detail?id=42450). | |
11 | |
12 namespace base { | |
13 class AutoLock; | |
14 class Lock; | |
15 } | |
16 | |
17 // An abstract base class for listening to events. | |
18 // | |
19 // Don't inherit from this class yourself. Using NewEventListenerHookup() is | |
20 // much easier. | |
21 template <typename EventType> | |
22 class EventListener { | |
23 public: | |
24 virtual void HandleEvent(const EventType& event) = 0; | |
25 | |
26 protected: | |
27 virtual ~EventListener() {} | |
28 }; | |
29 | |
30 // See the -inl.h for details about the following. | |
31 | |
32 template <typename EventTraits, typename NotifyLock = base::Lock, | |
33 typename ScopedNotifyLocker = base::AutoLock> | |
34 class EventChannel; | |
35 | |
36 class EventListenerHookup; | |
37 | |
38 template <typename EventChannel, typename CallbackObject, | |
39 typename CallbackMethod> | |
40 EventListenerHookup* NewEventListenerHookup(EventChannel* channel, | |
41 CallbackObject* cbobject, | |
42 CallbackMethod cbmethod); | |
43 | |
44 template <typename EventChannel, typename CallbackObject, | |
45 typename CallbackMethod, typename CallbackArg0> | |
46 EventListenerHookup* NewEventListenerHookup(EventChannel* channel, | |
47 CallbackObject* cbobject, | |
48 CallbackMethod cbmethod, | |
49 CallbackArg0 arg0); | |
50 | |
51 #endif // CHROME_COMMON_DEPRECATED_EVENT_SYS_H_ | |
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