Unified Gesture Recognizer

ui/events/gestures/gesture_provider_aura.h

+// Copyright 2014 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_EVENTS_GESTURE_DETECTION_UI_GESTURE_PROVIDER_H_
+#define UI_EVENTS_GESTURE_DETECTION_UI_GESTURE_PROVIDER_H_
+
+#include "base/basictypes.h"
+#include "ui/events/event.h"
+#include "ui/events/events_export.h"
+#include "ui/events/gesture_detection/filtered_gesture_provider.h"
+#include "ui/events/gesture_detection/gesture_event_data_packet.h"
+#include "ui/events/gesture_detection/touch_disposition_gesture_filter.h"
+#include "ui/events/gestures/motion_event_aura.h"
+
+namespace ui {
+
+class EVENTS_EXPORT GestureProviderAuraClient {
+ public:
+  virtual ~GestureProviderAuraClient() {}
+  virtual void OnGestureEvent(GestureEvent* event) = 0;
+};
+
+// Provides gesture detection and dispatch given a sequence of touch events
+// and touch event acks.
+class EVENTS_EXPORT GestureProviderAura : public GestureProviderClient {
+ public:
+  GestureProviderAura(GestureProviderAuraClient* client);
+  virtual ~GestureProviderAura();
+
+  bool OnTouchEvent(const TouchEvent& event);
+  void OnTouchEventAck(bool event_consumed);
+  const MotionEventAura& pointer_state() { return pointer_state_; }
+
+  // GestureProviderClient implementation
+  virtual void OnGestureEvent(const GestureEventData& gesture) OVERRIDE;
+
+ private:
+  GestureProviderAuraClient* client_;
+  MotionEventAura pointer_state_;
+  FilteredGestureProvider filtered_gesture_provider_;
+
+  int last_touch_event_flags_;
+
+  DISALLOW_COPY_AND_ASSIGN(GestureProviderAura);
+};
+
+}  // namespace ui
+
+#endif  // UI_EVENTS_GESTURE_DETECTION_UI_GESTURE_PROVIDER_H_