Split Screen mode implementation

athena/wm/bezel_controller.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 ATHENA_WM_BEZEL_CONTROLLER_H_
 #define ATHENA_WM_BEZEL_CONTROLLER_H_
 
 #include "ui/events/event_handler.h"
 
 namespace aura {
@@ skipping 49 matching lines @@
 
  private:
   enum State {
     NONE,
     IGNORE_CURRENT_SCROLL,
     BEZEL_GESTURE_STARTED,
     BEZEL_SCROLLING_ONE_FINGER,
     BEZEL_SCROLLING_TWO_FINGERS,
   };
 
-  // Calculates the distance from |position| to the |bezel|.
-  float GetDistance(const gfx::PointF& position, Bezel bezel);
+  // Calculates the distance from |location| specified in |window|'s coordinates
+  // to the |bezel|.
+  float GetDistance(const gfx::PointF& location,
+                    aura::Window* window,
+                    Bezel bezel);
 
-  // |scroll_position| only needs to be passed in the scrolling state
-  void SetState(State state, const gfx::PointF& scroll_position);
+  // |scroll_delta| only needs to be passed in the scrolling state
+  void SetState(State state, float scroll_delta);
 
   // Returns the bezel corresponding to the |location| or BEZEL_NONE if the
   // location is outside of the bezel area.
   Bezel GetBezel(const gfx::PointF& location);
 
   // ui::EventHandler overrides
   virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
 
   aura::Window* container_;
 
   State state_;
 
   // The bezel where the currently active scroll was started.
   Bezel scroll_bezel_;
 
   // The target of the bezel scroll gesture. Used to filter out other gestures
   // when the bezel scroll is in progress.
   ui::EventTarget* scroll_target_;
 
   // Responsible for handling gestures started from the left and right bezels.
   // Not owned.
   ScrollDelegate* left_right_delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(BezelController);
 };
 
 }  // namespace athena
 
 #endif  // ATHENA_WM_BEZEL_CONTROLLER_H_