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Side by Side Diff: views/touchui/gesture_manager.h

Issue 8568022: views: Move desktop and touchui directories to ui/views/. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 9 years, 1 month ago
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1 // Copyright (c) 2011 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 VIEWS_TOUCHUI_GESTURE_MANAGER_H_
6 #define VIEWS_TOUCHUI_GESTURE_MANAGER_H_
7 #pragma once
8
9 #include "base/memory/singleton.h"
10 #include "views/view.h"
11
12 namespace ui {
13 enum TouchStatus;
14 }
15
16 namespace views {
17 class TouchEvent;
18
19 // A GestureManager singleton detects gestures occurring in the
20 // incoming feed of touch events across all of the RootViews in
21 // the system. In response to a given touch event, the GestureManager
22 // updates its internal state and optionally dispatches synthetic
23 // events to the invoking view.
24 //
25 class VIEWS_EXPORT GestureManager {
26 public:
27 virtual ~GestureManager();
28
29 static GestureManager* GetInstance();
30
31 // Invoked for each touch event that could contribute to the current gesture.
32 // Takes the event and the View that originated it and which will also
33 // be the target of any generated synthetic event. Finally, status
34 // specifies if a touch sequence is in progress or not, so that the
35 // GestureManager state can correctly reflect events that are handled
36 // already.
37 // Returns true if the event resulted in firing a synthetic event.
38 virtual bool ProcessTouchEventForGesture(const TouchEvent& event,
39 View* source,
40 ui::TouchStatus status);
41
42 // TODO(rjkroege): Write the remainder of this class.
43 // It will appear in a subsequent CL.
44
45 protected:
46 GestureManager();
47
48 private:
49 friend struct DefaultSingletonTraits<GestureManager>;
50
51 DISALLOW_COPY_AND_ASSIGN(GestureManager);
52 };
53
54
55 } // namespace views
56
57 #endif // VIEWS_TOUCHUI_GESTURE_MANAGER_H_
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