Initial views touchui Gesture Recognizer support

ui/base/events.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_BASE_EVENTS_H_
 #define UI_BASE_EVENTS_H_
 #pragma once
 
 #include "base/event_types.h"
 #include "ui/base/keycodes/keyboard_codes.h"
@@ skipping 20 matching lines @@
   ET_TOUCH_RELEASED,
   ET_TOUCH_PRESSED,
   ET_TOUCH_MOVED,
   ET_TOUCH_STATIONARY,
   ET_TOUCH_CANCELLED,
   ET_DROP_TARGET_EVENT,
   ET_FOCUS_CHANGE,
   ET_SCROLL,
   ET_TRANSLATED_KEY_PRESS,
   ET_TRANSLATED_KEY_RELEASE,
+
+  // GestureEvent types
+  ET_GESTURE_SCROLL_BEGIN,
+  ET_GESTURE_SCROLL_END,
+  ET_GESTURE_SCROLL_UPDATE,
+  ET_GESTURE_TAP,
+  ET_GESTURE_TAP_DOWN,
+  ET_GESTURE_DOUBLE_TAP,
 };
 
 // Event flags currently supported
 enum EventFlags {
   EF_CAPS_LOCK_DOWN      = 1 << 0,
   EF_SHIFT_DOWN          = 1 << 1,
   EF_CONTROL_DOWN        = 1 << 2,
   EF_ALT_DOWN            = 1 << 3,
   EF_LEFT_MOUSE_BUTTON   = 1 << 4,
   EF_MIDDLE_MOUSE_BUTTON = 1 << 5,
@@ skipping 18 matching lines @@
   TOUCH_STATUS_CANCEL,       // The touch event was cancelled, but didn't
                              // terminate the touch sequence.
   TOUCH_STATUS_SYNTH_MOUSE   // The touch event was not processed, but a
                              // synthetic mouse event generated from the
                              // unused touch event was handled.
 };
 
 // Updates the list of devices for cached properties.
 UI_EXPORT void UpdateDeviceList();
 
+enum GestureStatus {
+  GESTURE_STATUS_UNKNOWN = 0,  // Unknown Gesture status. This is used to
+                               // indicate that the Gesture event was not
+                               // handled.
+  GESTURE_STATUS_CONSUMED,     // The Gesture event got consumed.
+  GESTURE_STATUS_SYNTH_MOUSE   // The Gesture event was not processed, but a
+                               // synthetic mouse event generated from the
+                               // unused Gesture event was handled.
+};
+
 // Get the EventType from a native event.
 UI_EXPORT EventType EventTypeFromNative(const base::NativeEvent& native_event);
 
 // Get the EventFlags from a native event.
 UI_EXPORT int EventFlagsFromNative(const base::NativeEvent& native_event);
 
 // Get the location from a native event.  The coordinate system of the resultant
 // |Point| has the origin at top-left of the "root window".  The nature of
 // this "root window" and how it maps to platform-specific drawing surfaces is
 // defined in ui/aura/root_window.* and ui/aura/root_window_host*.
@@ skipping 36 matching lines @@
 UI_EXPORT bool GetScrollOffsets(const base::NativeEvent& native_event,
                                 float* x_offset,
                                 float* y_offset);
 
 // Creates and returns no-op event.
 UI_EXPORT base::NativeEvent CreateNoopEvent();
 
 }  // namespace ui
 
 #endif  // UI_BASE_EVENTS_H_