event_constants.h revision 5c02ac1a9c1b504631c0a3d2b6e737b5d738bae1 
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_CANCELLED,
27  ET_DROP_TARGET_EVENT,
28  ET_TRANSLATED_KEY_PRESS,
29  ET_TRANSLATED_KEY_RELEASE,
30
31  // GestureEvent types
32  ET_GESTURE_SCROLL_BEGIN,
33  ET_GESTURE_TYPE_START = 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_TAP_UNCONFIRMED, // User tapped, but the tap delay hasn't expired.
40  ET_GESTURE_DOUBLE_TAP,
41  ET_GESTURE_BEGIN,  // Sent before any other gesture types.
42  ET_GESTURE_END,    // Sent after any other gestures.
43  ET_GESTURE_TWO_FINGER_TAP,
44  ET_GESTURE_PINCH_BEGIN,
45  ET_GESTURE_PINCH_END,
46  ET_GESTURE_PINCH_UPDATE,
47  ET_GESTURE_LONG_PRESS,
48  ET_GESTURE_LONG_TAP,
49  // A SWIPE gesture can happen at the end of a TAP_UP gesture if the
50  // finger(s) were moving quickly before they are released.
51  ET_GESTURE_MULTIFINGER_SWIPE,
52  ET_GESTURE_SHOW_PRESS,
53
54  // Sent by Win8+ metro when the user swipes from the bottom or top.
55  ET_GESTURE_WIN8_EDGE_SWIPE,
56
57  // Scroll support.
58  // TODO[davemoore] we need to unify these events w/ touch and gestures.
59  ET_SCROLL,
60  ET_SCROLL_FLING_START,
61  ET_SCROLL_FLING_CANCEL,
62  ET_GESTURE_TYPE_END = ET_SCROLL_FLING_CANCEL,
63
64  // Sent by the system to indicate any modal type operations, such as drag and
65  // drop or menus, should stop.
66  ET_CANCEL_MODE,
67
68  // Sent by the CrOS gesture library for interesting patterns that we want
69  // to track with the UMA system.
70  ET_UMA_DATA,
71
72  // Must always be last. User namespace starts above this value.
73  // See ui::RegisterCustomEventType().
74  ET_LAST
75};
76
77// Event flags currently supported
78enum EventFlags {
79  EF_NONE                = 0,       // Used to denote no flags explicitly
80  EF_CAPS_LOCK_DOWN      = 1 << 0,
81  EF_SHIFT_DOWN          = 1 << 1,
82  EF_CONTROL_DOWN        = 1 << 2,
83  EF_ALT_DOWN            = 1 << 3,
84  EF_LEFT_MOUSE_BUTTON   = 1 << 4,
85  EF_MIDDLE_MOUSE_BUTTON = 1 << 5,
86  EF_RIGHT_MOUSE_BUTTON  = 1 << 6,
87  EF_COMMAND_DOWN        = 1 << 7,  // Only useful on OSX
88  EF_EXTENDED            = 1 << 8,  // Windows extended key (see WM_KEYDOWN doc)
89  EF_IS_SYNTHESIZED      = 1 << 9,
90  EF_ALTGR_DOWN          = 1 << 10,
91  EF_MOD3_DOWN           = 1 << 11,
92};
93
94// Flags specific to key events
95enum KeyEventFlags {
96  EF_NUMPAD_KEY         = 1 << 16,  // Key originates from number pad (Xkb only)
97  EF_IME_FABRICATED_KEY = 1 << 17,  // Key event fabricated by the underlying
98                                    // IME without a user action.
99                                    // (Linux X11 only)
100};
101
102// Flags specific to mouse events
103enum MouseEventFlags {
104  EF_IS_DOUBLE_CLICK    = 1 << 16,
105  EF_IS_TRIPLE_CLICK    = 1 << 17,
106  EF_IS_NON_CLIENT      = 1 << 18,
107  EF_FROM_TOUCH         = 1 << 19,  // Indicates this mouse event is generated
108                                    // from an unconsumed touch/gesture event.
109};
110
111// Result of dispatching an event.
112enum EventResult {
113  ER_UNHANDLED = 0,       // The event hasn't been handled. The event can be
114                          // propagated to other handlers.
115  ER_HANDLED   = 1 << 0,  // The event has already been handled, but it can
116                          // still be propagated to other handlers.
117  ER_CONSUMED  = 1 << 1,  // The event has been handled, and it should not be
118                          // propagated to other handlers.
119};
120
121// Phase of the event dispatch.
122enum EventPhase {
123  EP_PREDISPATCH,
124  EP_PRETARGET,
125  EP_TARGET,
126  EP_POSTTARGET,
127  EP_POSTDISPATCH
128};
129
130}  // namespace ui
131
132#endif  // UI_EVENTS_EVENT_CONSTANTS_H_
133