1 // Copyright (c) 2012 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 ASH_WM_SYSTEM_GESTURE_EVENT_FILTER_H_
6 #define ASH_WM_SYSTEM_GESTURE_EVENT_FILTER_H_
7 
8 #include <memory>
9 
10 #include "base/macros.h"
11 #include "ui/events/event_handler.h"
12 
13 namespace ash {
14 class WmGestureHandler;
15 
16 // An event filter which handles system level gesture events.
17 class SystemGestureEventFilter : public ui::EventHandler {
18  public:
19   SystemGestureEventFilter();
20   ~SystemGestureEventFilter() override;
21 
22   // Overridden from ui::EventHandler:
23   void OnMouseEvent(ui::MouseEvent* event) override;
24   void OnScrollEvent(ui::ScrollEvent* event) override;
25 
26  private:
27   friend class SystemGestureEventFilterTest;
28 
29   std::unique_ptr<WmGestureHandler> wm_gesture_handler_;
30 
31   DISALLOW_COPY_AND_ASSIGN(SystemGestureEventFilter);
32 };
33 
34 }  // namespace ash
35 
36 #endif  // ASH_WM_SYSTEM_GESTURE_EVENT_FILTER_H_
37