event_constants.h revision 5d1f7b1de12d16ceb2c938c56701a3e8bfa558f7 
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 UI_EVENTS_EVENT_CONSTANTS_H_
6#define UI_EVENTS_EVENT_CONSTANTS_H_
7
8namespace ui {
9
10// Event types. (prefixed because of a conflict with windows headers)
11enum EventType {
12  ET_UNKNOWN = 0,
13  ET_MOUSE_PRESSED,
14  ET_MOUSE_DRAGGED,
15  ET_MOUSE_RELEASED,
16  ET_MOUSE_MOVED,
17  ET_MOUSE_ENTERED,
18  ET_MOUSE_EXITED,
19  ET_KEY_PRESSED,
20  ET_KEY_RELEASED,
21  ET_MOUSEWHEEL,
22  ET_MOUSE_CAPTURE_CHANGED,  // Event has no location.
23  ET_TOUCH_RELEASED,
24  ET_TOUCH_PRESSED,
25  ET_TOUCH_MOVED,
26  ET_TOUCH_STATIONARY,
27  ET_TOUCH_CANCELLED,
28  ET_DROP_TARGET_EVENT,
29  ET_TRANSLATED_KEY_PRESS,
30  ET_TRANSLATED_KEY_RELEASE,
31
32  // GestureEvent types
33  ET_GESTURE_SCROLL_BEGIN,
34  ET_GESTURE_SCROLL_END,
35  ET_GESTURE_SCROLL_UPDATE,
36  ET_GESTURE_TAP,
37  ET_GESTURE_TAP_DOWN,
38  ET_GESTURE_TAP_CANCEL,
39  ET_GESTURE_BEGIN,  // Sent before any other gesture types.
40  ET_GESTURE_END,    // Sent after any other gestures.
41  ET_GESTURE_TWO_FINGER_TAP,
42  ET_GESTURE_PINCH_BEGIN,
43  ET_GESTURE_PINCH_END,
44  ET_GESTURE_PINCH_UPDATE,
45  ET_GESTURE_LONG_PRESS,
46  ET_GESTURE_LONG_TAP,
47  // A SWIPE gesture can happen at the end of a TAP_UP gesture if the
48  // finger(s) were moving quickly before they are released.
49  ET_GESTURE_MULTIFINGER_SWIPE,
50  ET_GESTURE_SHOW_PRESS,
51
52  // Sent by Win8+ metro when the user swipes from the bottom or top.
53  ET_GESTURE_WIN8_EDGE_SWIPE,
54
55  // Scroll support.
56  // TODO[davemoore] we need to unify these events w/ touch and gestures.
57  ET_SCROLL,
58  ET_SCROLL_FLING_START,
59  ET_SCROLL_FLING_CANCEL,
60
61  // Sent by the system to indicate any modal type operations, such as drag and
62  // drop or menus, should stop.
63  ET_CANCEL_MODE,
64
65  // Sent by the CrOS gesture library for interesting patterns that we want
66  // to track with the UMA system.
67  ET_UMA_DATA,
68
69  // Must always be last. User namespace starts above this value.
70  // See ui::RegisterCustomEventType().
71  ET_LAST
72};
73
74// Event flags currently supported
75enum EventFlags {
76  EF_NONE                = 0,       // Used to denote no flags explicitly
77  EF_CAPS_LOCK_DOWN      = 1 << 0,
78  EF_SHIFT_DOWN          = 1 << 1,
79  EF_CONTROL_DOWN        = 1 << 2,
80  EF_ALT_DOWN            = 1 << 3,
81  EF_LEFT_MOUSE_BUTTON   = 1 << 4,
82  EF_MIDDLE_MOUSE_BUTTON = 1 << 5,
83  EF_RIGHT_MOUSE_BUTTON  = 1 << 6,
84  EF_COMMAND_DOWN        = 1 << 7,  // Only useful on OSX
85  EF_EXTENDED            = 1 << 8,  // Windows extended key (see WM_KEYDOWN doc)
86  EF_IS_SYNTHESIZED      = 1 << 9,
87  EF_ALTGR_DOWN          = 1 << 10,
88};
89
90// Flags specific to mouse events
91enum MouseEventFlags {
92  EF_IS_DOUBLE_CLICK    = 1 << 16,
93  EF_IS_TRIPLE_CLICK    = 1 << 17,
94  EF_IS_NON_CLIENT      = 1 << 18,
95  EF_FROM_TOUCH         = 1 << 19,  // Indicates this mouse event is generated
96                                    // from an unconsumed touch/gesture event.
97};
98
99// Result of dispatching an event.
100enum EventResult {
101  ER_UNHANDLED = 0,       // The event hasn't been handled. The event can be
102                          // propagated to other handlers.
103  ER_HANDLED   = 1 << 0,  // The event has already been handled, but it can
104                          // still be propagated to other handlers.
105  ER_CONSUMED  = 1 << 1,  // The event has been handled, and it should not be
106                          // propagated to other handlers.
107};
108
109// Phase of the event dispatch.
110enum EventPhase {
111  EP_PREDISPATCH,
112  EP_PRETARGET,
113  EP_TARGET,
114  EP_POSTTARGET,
115  EP_POSTDISPATCH
116};
117
118}  // namespace ui
119
120#endif  // UI_EVENTS_EVENT_CONSTANTS_H_
121