event_constants.h revision 0529e5d033099cbfc42635f6f6183833b09dff6e 
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_TYPE_START = ET_GESTURE_SCROLL_BEGIN,
35  ET_GESTURE_SCROLL_END,
36  ET_GESTURE_SCROLL_UPDATE,
37  ET_GESTURE_TAP,
38  ET_GESTURE_TAP_DOWN,
39  ET_GESTURE_TAP_CANCEL,
40  ET_GESTURE_TAP_UNCONFIRMED, // User tapped, but the tap delay hasn't expired.
41  ET_GESTURE_DOUBLE_TAP,
42  ET_GESTURE_BEGIN,  // Sent before any other gesture types.
43  ET_GESTURE_END,    // Sent after any other gestures.
44  ET_GESTURE_TWO_FINGER_TAP,
45  ET_GESTURE_PINCH_BEGIN,
46  ET_GESTURE_PINCH_END,
47  ET_GESTURE_PINCH_UPDATE,
48  ET_GESTURE_LONG_PRESS,
49  ET_GESTURE_LONG_TAP,
50  // A SWIPE gesture can happen at the end of a TAP_UP gesture if the
51  // finger(s) were moving quickly before they are released.
52  ET_GESTURE_MULTIFINGER_SWIPE,
53  ET_GESTURE_SHOW_PRESS,
54
55  // Sent by Win8+ metro when the user swipes from the bottom or top.
56  ET_GESTURE_WIN8_EDGE_SWIPE,
57
58  // Scroll support.
59  // TODO[davemoore] we need to unify these events w/ touch and gestures.
60  ET_SCROLL,
61  ET_SCROLL_FLING_START,
62  ET_SCROLL_FLING_CANCEL,
63  ET_GESTURE_TYPE_END = ET_SCROLL_FLING_CANCEL,
64
65  // Sent by the system to indicate any modal type operations, such as drag and
66  // drop or menus, should stop.
67  ET_CANCEL_MODE,
68
69  // Sent by the CrOS gesture library for interesting patterns that we want
70  // to track with the UMA system.
71  ET_UMA_DATA,
72
73  // Must always be last. User namespace starts above this value.
74  // See ui::RegisterCustomEventType().
75  ET_LAST
76};
77
78// Event flags currently supported
79enum EventFlags {
80  EF_NONE                = 0,       // Used to denote no flags explicitly
81  EF_CAPS_LOCK_DOWN      = 1 << 0,
82  EF_SHIFT_DOWN          = 1 << 1,
83  EF_CONTROL_DOWN        = 1 << 2,
84  EF_ALT_DOWN            = 1 << 3,
85  EF_LEFT_MOUSE_BUTTON   = 1 << 4,
86  EF_MIDDLE_MOUSE_BUTTON = 1 << 5,
87  EF_RIGHT_MOUSE_BUTTON  = 1 << 6,
88  EF_COMMAND_DOWN        = 1 << 7,  // Only useful on OSX
89  EF_EXTENDED            = 1 << 8,  // Windows extended key (see WM_KEYDOWN doc)
90  EF_IS_SYNTHESIZED      = 1 << 9,
91  EF_ALTGR_DOWN          = 1 << 10,
92  EF_MOD3_DOWN           = 1 << 11,
93};
94
95// Flags specific to key events
96enum KeyEventFlags {
97  EF_NUMPAD_KEY         = 1 << 16,  // Key originates from number pad (Xkb only)
98};
99
100// Flags specific to mouse events
101enum MouseEventFlags {
102  EF_IS_DOUBLE_CLICK    = 1 << 16,
103  EF_IS_TRIPLE_CLICK    = 1 << 17,
104  EF_IS_NON_CLIENT      = 1 << 18,
105  EF_FROM_TOUCH         = 1 << 19,  // Indicates this mouse event is generated
106                                    // from an unconsumed touch/gesture event.
107};
108
109// Result of dispatching an event.
110enum EventResult {
111  ER_UNHANDLED = 0,       // The event hasn't been handled. The event can be
112                          // propagated to other handlers.
113  ER_HANDLED   = 1 << 0,  // The event has already been handled, but it can
114                          // still be propagated to other handlers.
115  ER_CONSUMED  = 1 << 1,  // The event has been handled, and it should not be
116                          // propagated to other handlers.
117};
118
119// Phase of the event dispatch.
120enum EventPhase {
121  EP_PREDISPATCH,
122  EP_PRETARGET,
123  EP_TARGET,
124  EP_POSTTARGET,
125  EP_POSTDISPATCH
126};
127
128}  // namespace ui
129
130#endif  // UI_EVENTS_EVENT_CONSTANTS_H_
131