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Side by Side Diff: ui/events/ozone/evdev/touch_event_converter_ozone.h

Issue 28513004: Move evdev events support into EventFactoryDelegateEvdev (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 7 years, 2 months ago
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1 // Copyright (c) 2013 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_OZONE_EVDEV_TOUCH_EVENT_CONVERTER_OZONE_H_
6 #define UI_EVENTS_OZONE_EVDEV_TOUCH_EVENT_CONVERTER_OZONE_H_
7
8 #include <bitset>
9
10 #include "base/compiler_specific.h"
11 #include "ui/events/event_constants.h"
12 #include "ui/events/events_export.h"
13 #include "ui/events/ozone/event_converter_ozone.h"
14
15 namespace ui {
16
17 class TouchEvent;
18
19 class EVENTS_EXPORT TouchEventConverterOzone : public EventConverterOzone {
20 public:
21 enum {
22 MAX_FINGERS = 11
23 };
24 TouchEventConverterOzone(int fd, int id);
25 virtual ~TouchEventConverterOzone();
26
27 private:
28 friend class MockTouchEventConverterOzone;
29
30 // Unsafe part of initialization.
31 void Init();
32
33 // Overidden from base::MessagePumpLibevent::Watcher.
34 virtual void OnFileCanReadWithoutBlocking(int fd) OVERRIDE;
35 virtual void OnFileCanWriteWithoutBlocking(int fd) OVERRIDE;
36
37 // Pressure values.
38 int pressure_min_;
39 int pressure_max_; // Used to normalize pressure values.
40
41 // Touch scaling.
42 float x_scale_;
43 float y_scale_;
44
45 // Maximum coordinate-values allowed for the events.
46 int x_max_;
47 int y_max_;
48
49 // Touch point currently being updated from the /dev/input/event* stream.
50 int current_slot_;
51
52 // File descriptor for the /dev/input/event* instance.
53 int fd_;
54
55 // Number corresponding to * in the source evdev device: /dev/input/event*
56 int id_;
57
58 // Bit field tracking which in-progress touch points have been modified
59 // without a syn event.
60 std::bitset<MAX_FINGERS> altered_slots_;
61
62 struct InProgressEvents {
63 int x_;
64 int y_;
65 int id_; // Device reported "unique" touch point id; -1 means not active
66 int finger_; // "Finger" id starting from 0; -1 means not active
67
68 EventType type_;
69 int major_;
70 float pressure_;
71 };
72
73 // In-progress touch points.
74 InProgressEvents events_[MAX_FINGERS];
75
76 DISALLOW_COPY_AND_ASSIGN(TouchEventConverterOzone);
77 };
78
79 } // namespace ui
80
81 #endif // UI_EVENTS_OZONE_EVDEV_TOUCH_EVENT_CONVERTER_OZONE_H_
82
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