Scaling scroll/fling events in multi-monitor setup

ui/base/events/event.h

 // Copyright (c) 2012 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_EVENT_H_
 #define UI_BASE_EVENTS_EVENT_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/event_types.h"
@@ skipping 614 matching lines @@
         finger_count_(model.finger_count_){
   }
 
   // Used for tests.
   ScrollEvent(EventType type,
               const gfx::Point& location,
               int flags,
               float x_offset,
               float y_offset);
 
+  // Rescale the scroll event's offset value.
+  // This is useful in the multi-monitor setup where it needs to be scaled
+  // to provide a consistent user experience.
+  void Rescale(const float factor);

[DaveMoore, 2013/01/07 04:31:45]

Nit: The naming of this is a bit strange. Isn't it "Scale" not "Rescale"?

+
   float x_offset() const { return x_offset_; }
   float y_offset() const { return y_offset_; }
   int finger_count() const { return finger_count_; }
 
  private:
   float x_offset_;
   float y_offset_;
   int finger_count_;
 
   DISALLOW_COPY_AND_ASSIGN(ScrollEvent);
@@ skipping 35 matching lines @@
   // This value is stored as a bitfield because the number of touch ids varies,
   // but we currently don't need more than 32 touches at a time.
   const unsigned int touch_ids_bitfield_;
 
   DISALLOW_COPY_AND_ASSIGN(GestureEvent);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_EVENTS_EVENT_H_