motion_event_generic.h revision 5f1c94371a64b3196d4be9466099bb892df9b88e 
1// Copyright 2014 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 UI_EVENTS_GESTURE_DETECTION_UI_MOTION_EVENT_GENERIC_H_
6#define UI_EVENTS_GESTURE_DETECTION_UI_MOTION_EVENT_GENERIC_H_
7
8#include "base/basictypes.h"
9#include "base/containers/stack_container.h"
10#include "ui/events/gesture_detection/gesture_detection_export.h"
11#include "ui/events/gesture_detection/motion_event.h"
12
13namespace ui {
14
15struct GESTURE_DETECTION_EXPORT PointerProperties {
16  PointerProperties();
17  PointerProperties(float x, float y);
18
19  int id;
20  MotionEvent::ToolType tool_type;
21  float x;
22  float y;
23  float raw_x;
24  float raw_y;
25  float pressure;
26  float touch_major;
27};
28
29// A generic MotionEvent implementation.
30class GESTURE_DETECTION_EXPORT MotionEventGeneric : public MotionEvent {
31 public:
32  MotionEventGeneric(Action action,
33                     base::TimeTicks event_time,
34                     const PointerProperties& pointer);
35  MotionEventGeneric(const MotionEventGeneric& other);
36
37  virtual ~MotionEventGeneric();
38
39  // MotionEvent implementation.
40  virtual int GetId() const OVERRIDE;
41  virtual Action GetAction() const OVERRIDE;
42  virtual int GetActionIndex() const OVERRIDE;
43  virtual size_t GetPointerCount() const OVERRIDE;
44  virtual int GetPointerId(size_t pointer_index) const OVERRIDE;
45  virtual float GetX(size_t pointer_index) const OVERRIDE;
46  virtual float GetY(size_t pointer_index) const OVERRIDE;
47  virtual float GetRawX(size_t pointer_index) const OVERRIDE;
48  virtual float GetRawY(size_t pointer_index) const OVERRIDE;
49  virtual float GetTouchMajor(size_t pointer_index) const OVERRIDE;
50  virtual float GetPressure(size_t pointer_index) const OVERRIDE;
51  virtual ToolType GetToolType(size_t pointer_index) const OVERRIDE;
52  virtual int GetButtonState() const OVERRIDE;
53  virtual base::TimeTicks GetEventTime() const OVERRIDE;
54  virtual scoped_ptr<MotionEvent> Clone() const OVERRIDE;
55  virtual scoped_ptr<MotionEvent> Cancel() const OVERRIDE;
56
57  void PushPointer(const PointerProperties& pointer);
58
59  void set_action(Action action) { action_ = action; }
60  void set_event_time(base::TimeTicks event_time) { event_time_ = event_time; }
61  void set_id(int id) { id_ = id; }
62  void set_action_index(int action_index) { action_index_ = action_index; }
63  void set_button_state(int button_state) { button_state_ = button_state; }
64
65 protected:
66  MotionEventGeneric();
67
68  void PopPointer();
69
70  PointerProperties& pointer(size_t index) { return pointers_[index]; }
71  const PointerProperties& pointer(size_t index) const {
72    return pointers_[index];
73  }
74
75 private:
76  enum { kTypicalMaxPointerCount = 5 };
77
78  Action action_;
79  base::TimeTicks event_time_;
80  int id_;
81  int action_index_;
82  int button_state_;
83  base::StackVector<PointerProperties, kTypicalMaxPointerCount> pointers_;
84};
85
86}  // namespace ui
87
88#endif  // UI_EVENTS_GESTURE_DETECTION_UI_MOTION_EVENT_GENERIC_H_
89