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- // Copyright 2014 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 UI_EVENTS_PLATFORM_PLATFORM_EVENT_OBSERVER_H_
- #define UI_EVENTS_PLATFORM_PLATFORM_EVENT_OBSERVER_H_
- #include "ui/events/events_export.h"
- #include "ui/events/platform_event.h"
- namespace ui {
- // PlatformEventObserver can be installed on a PlatformEventSource, and it
- // receives all events that are dispatched to the dispatchers.
- class EVENTS_EXPORT PlatformEventObserver {
- public:
- // This is called before the dispatcher receives the event.
- virtual void WillProcessEvent(const PlatformEvent& event) = 0;
- // This is called after the event has been dispatched to the dispatcher(s).
- virtual void DidProcessEvent(const PlatformEvent& event) = 0;
- protected:
- virtual ~PlatformEventObserver() {}
- };
- } // namespace ui
- #endif // UI_EVENTS_PLATFORM_PLATFORM_EVENT_OBSERVER_H_
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