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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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