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- // Copyright (c) 2012 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_AURA_CLIENT_EVENT_CLIENT_H_
- #define UI_AURA_CLIENT_EVENT_CLIENT_H_
- #include "ui/aura/aura_export.h"
- namespace ui {
- class EventTarget;
- }
- namespace aura {
- class Window;
- namespace client {
- // An interface implemented by an object that alters event processing.
- class AURA_EXPORT EventClient {
- public:
- // Returns true if events can be processed by |window| or any of its children.
- virtual bool GetCanProcessEventsWithinSubtree(const Window* window) const = 0;
- // Returns the top level EventTarget for the current environment.
- virtual ui::EventTarget* GetToplevelEventTarget() = 0;
- protected:
- virtual ~EventClient() {}
- };
- // Sets/Gets the event client on the root Window.
- AURA_EXPORT void SetEventClient(Window* root_window, EventClient* client);
- AURA_EXPORT EventClient* GetEventClient(const Window* root_window);
- } // namespace clients
- } // namespace aura
- #endif // UI_AURA_CLIENT_EVENT_CLIENT_H_
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