ui/events/event_constants.h

   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
   8 namespace ui {
   9
  10 // Event types. (prefixed because of a conflict with windows headers)
  11 enum 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
  29   // GestureEvent types
  30   ET_GESTURE_SCROLL_BEGIN,
  31   ET_GESTURE_TYPE_START = ET_GESTURE_SCROLL_BEGIN,
  32   ET_GESTURE_SCROLL_END,
  33   ET_GESTURE_SCROLL_UPDATE,
  34   ET_GESTURE_TAP,
  35   ET_GESTURE_TAP_DOWN,
  36   ET_GESTURE_TAP_CANCEL,
  37   ET_GESTURE_TAP_UNCONFIRMED, // User tapped, but the tap delay hasn't expired.
  38   ET_GESTURE_DOUBLE_TAP,
  39   ET_GESTURE_BEGIN,  // The first event sent when each finger is pressed.
  40   ET_GESTURE_END,    // Sent for each released finger.
  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 touch sequence involving one or
  48   // more fingers if the finger velocity was high enough when the first finger
  49   // was released.
  50   ET_GESTURE_SWIPE,
  51   ET_GESTURE_SHOW_PRESS,
  52
  53   // Sent by Win8+ metro when the user swipes from the bottom or top.
  54   ET_GESTURE_WIN8_EDGE_SWIPE,
  55
  56   // Scroll support.
  57   // TODO[davemoore] we need to unify these events w/ touch and gestures.
  58   ET_SCROLL,
  59   ET_SCROLL_FLING_START,
  60   ET_SCROLL_FLING_CANCEL,
  61   ET_GESTURE_TYPE_END = ET_SCROLL_FLING_CANCEL,
  62
  63   // Sent by the system to indicate any modal type operations, such as drag and
  64   // drop or menus, should stop.
  65   ET_CANCEL_MODE,
  66
  67   // Sent by the CrOS gesture library for interesting patterns that we want
  68   // to track with the UMA system.
  69   ET_UMA_DATA,
  70
  71   // Must always be last. User namespace starts above this value.
  72   // See ui::RegisterCustomEventType().
  73   ET_LAST
  74 };
  75
  76 // Event flags currently supported
  77 enum EventFlags {
  78   EF_NONE                 = 0,       // Used to denote no flags explicitly
  79   EF_CAPS_LOCK_DOWN       = 1 << 0,
  80   EF_SHIFT_DOWN           = 1 << 1,
  81   EF_CONTROL_DOWN         = 1 << 2,
  82   EF_ALT_DOWN             = 1 << 3,
  83   EF_LEFT_MOUSE_BUTTON    = 1 << 4,
  84   EF_MIDDLE_MOUSE_BUTTON  = 1 << 5,
  85   EF_RIGHT_MOUSE_BUTTON   = 1 << 6,
  86   EF_COMMAND_DOWN         = 1 << 7,  // GUI Key (e.g. Command on OS X
  87                                      // keyboards, Search on Chromebook
  88                                      // keyboards, Windows on MS-oriented
  89                                      // keyboards)
  90   EF_EXTENDED             = 1 << 8,  // Windows extended key (see WM_KEYDOWN
  91                                      // doc)
  92   EF_IS_SYNTHESIZED       = 1 << 9,
  93   EF_ALTGR_DOWN           = 1 << 10,
  94   EF_MOD3_DOWN            = 1 << 11,
  95   EF_BACK_MOUSE_BUTTON    = 1 << 12,
  96   EF_FORWARD_MOUSE_BUTTON = 1 << 13,
  97 };
  98
  99 // Flags specific to key events
 100 enum KeyEventFlags {
 101   EF_IME_FABRICATED_KEY = 1 << 16,  // Key event fabricated by the underlying
 102                                     // IME without a user action.
 103                                     // (Linux X11 only)
 104   EF_IS_REPEAT          = 1 << 17,
 105   EF_FINAL              = 1 << 18,  // Do not remap; the event was created with
 106                                     // the desired final values.
 107 };
 108
 109 // Flags specific to mouse events
 110 enum MouseEventFlags {
 111   EF_IS_DOUBLE_CLICK     = 1 << 16,
 112   EF_IS_TRIPLE_CLICK     = 1 << 17,
 113   EF_IS_NON_CLIENT       = 1 << 18,
 114   EF_FROM_TOUCH          = 1 << 19,  // Indicates this mouse event is generated
 115                                      // from an unconsumed touch/gesture event.
 116   EF_TOUCH_ACCESSIBILITY = 1 << 20,  // Indicates this event was generated from
 117                                      // touch accessibility mode.
 118 };
 119
 120 // Result of dispatching an event.
 121 enum EventResult {
 122   ER_UNHANDLED = 0,      // The event hasn't been handled. The event can be
 123                          // propagated to other handlers.
 124   ER_HANDLED = 1 << 0,   // The event has already been handled, but it can
 125                          // still be propagated to other handlers.
 126   ER_CONSUMED = 1 << 1,  // The event has been handled, and it should not be
 127                          // propagated to other handlers.
 128   ER_DISABLE_SYNC_HANDLING =
 129       1 << 2,  // The event shouldn't be handled synchronously. This
 130                // happens if the event is being handled
 131                // asynchronously, or if the event is invalid and
 132                // shouldn't be handled at all.
 133 };
 134
 135 // Phase of the event dispatch.
 136 enum EventPhase {
 137   EP_PREDISPATCH,
 138   EP_PRETARGET,
 139   EP_TARGET,
 140   EP_POSTTARGET,
 141   EP_POSTDISPATCH
 142 };
 143
 144 // Device ID for Touch and Key Events.
 145 enum EventDeviceId {
 146   ED_UNKNOWN_DEVICE = -1
 147 };
 148
 149 }  // namespace ui
 150
 151 #endif  // UI_EVENTS_EVENT_CONSTANTS_H_