[PATCH 5/11] ozone: evdev: Replace dispatch callbacks with an interface

ui/events/ozone/evdev/device_event_dispatcher_evdev.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
+// Copyright 2015 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_OZONE_EVDEV_EVENT_DISPATCH_CALLBACK_H_
-#define UI_EVENTS_OZONE_EVDEV_EVENT_DISPATCH_CALLBACK_H_
+#ifndef UI_EVENTS_OZONE_EVDEV_DEVICE_EVENT_DISPATCHER_H_
+#define UI_EVENTS_OZONE_EVDEV_DEVICE_EVENT_DISPATCHER_H_
 
-#include "base/callback.h"
 #include "base/time/time.h"
 #include "ui/events/event_constants.h"
 #include "ui/events/ozone/evdev/events_ozone_evdev_export.h"
 #include "ui/gfx/geometry/point_f.h"
 #include "ui/gfx/geometry/vector2d.h"
 #include "ui/gfx/geometry/vector2d_f.h"
 
-namespace base {
-class TimeDelta;
-}
-
-namespace gfx {
-class PointF;
-class Vector2d;
-class Vector2dF;
-}
-
 namespace ui {
 
-class Event;
-
-typedef base::Callback<void(scoped_ptr<Event>)> EventDispatchCallback;
-
 struct EVENTS_OZONE_EVDEV_EXPORT KeyEventParams {
   KeyEventParams(int device_id, unsigned int code, bool down);
   KeyEventParams(const KeyEventParams& other);
   ~KeyEventParams();
 
   int device_id;
   unsigned int code;
   bool down;
 };
 
-typedef base::Callback<void(const KeyEventParams& params)>
-    KeyEventDispatchCallback;
-
 struct EVENTS_OZONE_EVDEV_EXPORT MouseMoveEventParams {
   MouseMoveEventParams(int device_id, const gfx::PointF& location);
   MouseMoveEventParams(const MouseMoveEventParams& other);
   ~MouseMoveEventParams();
 
   int device_id;
   gfx::PointF location;
 };
 
-typedef base::Callback<void(const MouseMoveEventParams& params)>
-    MouseMoveEventDispatchCallback;
-
 struct EVENTS_OZONE_EVDEV_EXPORT MouseButtonEventParams {
   MouseButtonEventParams(int device_id,
                          const gfx::PointF& location,
                          unsigned int button,
                          bool down,
                          bool allow_remap);
   MouseButtonEventParams(const MouseButtonEventParams& other);
   ~MouseButtonEventParams();
 
   int device_id;
   gfx::PointF location;
   unsigned int button;
   bool down;
   bool allow_remap;
 };
 
-typedef base::Callback<void(const MouseButtonEventParams& params)>
-    MouseButtonEventDispatchCallback;
-
 struct EVENTS_OZONE_EVDEV_EXPORT MouseWheelEventParams {
   MouseWheelEventParams(int device_id,
                         const gfx::PointF& location,
                         const gfx::Vector2d& delta);
   MouseWheelEventParams(const MouseWheelEventParams& other);
   ~MouseWheelEventParams();
 
   int device_id;
   gfx::PointF location;
   gfx::Vector2d delta;
 };
 
-typedef base::Callback<void(const MouseWheelEventParams& params)>
-    MouseWheelEventDispatchCallback;
-
 struct EVENTS_OZONE_EVDEV_EXPORT ScrollEventParams {
   ScrollEventParams(int device_id,
                     EventType type,
                     const gfx::PointF location,
                     const gfx::Vector2dF delta,
                     const gfx::Vector2dF ordinal_delta,
                     int finger_count,
                     const base::TimeDelta timestamp);
   ScrollEventParams(const ScrollEventParams& other);
   ~ScrollEventParams();
 
   int device_id;
   EventType type;
   const gfx::PointF location;
   const gfx::Vector2dF delta;
   const gfx::Vector2dF ordinal_delta;
   int finger_count;
   const base::TimeDelta timestamp;
 };
 
-typedef base::Callback<void(const ScrollEventParams& params)>
-    ScrollEventDispatchCallback;
-
 struct EVENTS_OZONE_EVDEV_EXPORT TouchEventParams {
   TouchEventParams(int device_id,
                    int touch_id,
                    EventType type,
                    const gfx::PointF& location,
                    const gfx::Vector2dF& radii,
                    float pressure,
                    const base::TimeDelta& timestamp);
   TouchEventParams(const TouchEventParams& other);
   ~TouchEventParams();
 
   int device_id;
   int touch_id;
   EventType type;
   gfx::PointF location;
   gfx::Vector2dF radii;
   float pressure;
   base::TimeDelta timestamp;
 };
 
-typedef base::Callback<void(const TouchEventParams& params)>
-    TouchEventDispatchCallback;
+// Interface used by device objects for event dispatch.
+class EVENTS_OZONE_EVDEV_EXPORT DeviceEventDispatcherEvdev {
+ public:
+  DeviceEventDispatcherEvdev() {}
+  virtual ~DeviceEventDispatcherEvdev() {}
 
-}  // namspace ui
+  virtual void DispatchKeyEvent(const KeyEventParams& params) = 0;
+  virtual void DispatchMouseMoveEvent(const MouseMoveEventParams& params) = 0;
+  virtual void DispatchMouseButtonEvent(
+      const MouseButtonEventParams& params) = 0;
+  virtual void DispatchMouseWheelEvent(const MouseWheelEventParams& params) = 0;
+  virtual void DispatchScrollEvent(const ScrollEventParams& params) = 0;
+  virtual void DispatchTouchEvent(const TouchEventParams& params) = 0;
+};
 
-#endif  // UI_EVENTS_OZONE_EVDEV_EVENT_DISPATCH_CALLBACK_H_
+}  // namespace ui
+
+#endif  // UI_EVENTS_OZONE_EVDEV_DEVICE_EVENT_DISPATCHER_H_