ui/events/gestures/gesture_types.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_GESTURES_GESTURE_TYPES_H_
   6 #define UI_EVENTS_GESTURES_GESTURE_TYPES_H_
   7
   8 #include "ui/events/events_export.h"
   9
  10 namespace ui {
  11
  12 class GestureEvent;
  13 class TouchEvent;
  14
  15 // An abstract type for consumers of gesture-events created by the
  16 // gesture-recognizer.
  17 class EVENTS_EXPORT GestureConsumer {
  18  public:
  19   virtual ~GestureConsumer() {}
  20 };
  21
  22 // GestureEventHelper creates implementation-specific gesture events and
  23 // can dispatch them.
  24 class EVENTS_EXPORT GestureEventHelper {
  25  public:
  26   virtual ~GestureEventHelper() {
  27   }
  28
  29   // Returns true if this helper can dispatch events to |consumer|.
  30   virtual bool CanDispatchToConsumer(GestureConsumer* consumer) = 0;
  31   virtual void DispatchGestureEvent(GestureEvent* event) = 0;
  32   virtual void DispatchCancelTouchEvent(TouchEvent* event) = 0;
  33 };
  34
  35 }  // namespace ui
  36
  37 #endif  // UI_EVENTS_GESTURES_GESTURE_TYPES_H_