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// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_COMMON_DEPRECATED_EVENT_SYS_H_
#define CHROME_COMMON_DEPRECATED_EVENT_SYS_H_
#pragma once
// TODO: This class should be removed or moved to Notifier code.
// See Bug 42450 (http://code.google.com/p/chromium/issues/detail?id=42450).
class AutoLock;
class Lock;
// An abstract base class for listening to events.
//
// Don't inherit from this class yourself. Using NewEventListenerHookup() is
// much easier.
template <typename EventType>
class EventListener {
public:
virtual void HandleEvent(const EventType& event) = 0;
};
// See the -inl.h for details about the following.
template <typename EventTraits, typename NotifyLock = Lock,
typename ScopedNotifyLocker = AutoLock>
class EventChannel;
class EventListenerHookup;
template <typename EventChannel, typename CallbackObject,
typename CallbackMethod>
EventListenerHookup* NewEventListenerHookup(EventChannel* channel,
CallbackObject* cbobject,
CallbackMethod cbmethod);
template <typename EventChannel, typename CallbackObject,
typename CallbackMethod, typename CallbackArg0>
EventListenerHookup* NewEventListenerHookup(EventChannel* channel,
CallbackObject* cbobject,
CallbackMethod cbmethod,
CallbackArg0 arg0);
#endif // CHROME_COMMON_DEPRECATED_EVENT_SYS_H_
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