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   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,  // The first event sent when each finger is pressed.
  42   ET_GESTURE_END,    // Sent for each released finger.
  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 touch sequence involving one or
  50   // more fingers if the finger velocity was high enough when the first finger
  51   // was released.
  52   ET_GESTURE_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
  79 enum 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,  // GUI Key (e.g. Command on OS X
  89                                      // keyboards, Search on Chromebook
  90                                      // keyboards, Windows on MS-oriented
  91                                      // keyboards)
  92   EF_EXTENDED             = 1 << 8,  // Windows extended key (see WM_KEYDOWN
  93                                      // doc)
  94   EF_IS_SYNTHESIZED       = 1 << 9,
  95   EF_ALTGR_DOWN           = 1 << 10,
  96   EF_MOD3_DOWN            = 1 << 11,
  97   EF_BACK_MOUSE_BUTTON    = 1 << 12,
  98   EF_FORWARD_MOUSE_BUTTON = 1 << 13,
  99 };
 100
 101 // Flags specific to key events
 102 enum KeyEventFlags {
 103   EF_IME_FABRICATED_KEY = 1 << 16,  // Key event fabricated by the underlying
 104                                     // IME without a user action.
 105                                     // (Linux X11 only)
 106   EF_IS_REPEAT          = 1 << 17,
 107   EF_FINAL              = 1 << 18,  // Do not remap; the event was created with
 108                                     // the desired final values.
 109 };
 110
 111 // Flags specific to mouse events
 112 enum MouseEventFlags {
 113   EF_IS_DOUBLE_CLICK     = 1 << 16,
 114   EF_IS_TRIPLE_CLICK     = 1 << 17,
 115   EF_IS_NON_CLIENT       = 1 << 18,
 116   EF_FROM_TOUCH          = 1 << 19,  // Indicates this mouse event is generated
 117                                      // from an unconsumed touch/gesture event.
 118   EF_TOUCH_ACCESSIBILITY = 1 << 20,  // Indicates this event was generated from
 119                                      // touch accessibility mode.
 120 };
 121
 122 // Result of dispatching an event.
 123 enum EventResult {
 124   ER_UNHANDLED = 0,      // The event hasn't been handled. The event can be
 125                          // propagated to other handlers.
 126   ER_HANDLED = 1 << 0,   // The event has already been handled, but it can
 127                          // still be propagated to other handlers.
 128   ER_CONSUMED = 1 << 1,  // The event has been handled, and it should not be
 129                          // propagated to other handlers.
 130   ER_DISABLE_SYNC_HANDLING =
 131       1 << 2,  // The event shouldn't be handled synchronously. This
 132                // happens if the event is being handled
 133                // asynchronously, or if the event is invalid and
 134                // shouldn't be handled at all.
 135 };
 136
 137 // Phase of the event dispatch.
 138 enum EventPhase {
 139   EP_PREDISPATCH,
 140   EP_PRETARGET,
 141   EP_TARGET,
 142   EP_POSTTARGET,
 143   EP_POSTDISPATCH
 144 };
 145
 146 // Device ID for Touch and Key Events.
 147 enum EventDeviceId {
 148   ED_UNKNOWN_DEVICE = -1
 149 };
 150
 151 }  // namespace ui
 152
 153 #endif  // UI_EVENTS_EVENT_CONSTANTS_H_