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      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_VIEWS_MOUSE_WATCHER_VIEW_HOST_H_
      6 #define UI_VIEWS_MOUSE_WATCHER_VIEW_HOST_H_
      7 
      8 #include "ui/views/mouse_watcher.h"
      9 
     10 namespace views {
     11 
     12 class View;
     13 
     14 class VIEWS_EXPORT MouseWatcherViewHost : public MouseWatcherHost {
     15  public:
     16   // Creates a new MouseWatcherViewHost. |hot_zone_insets| is added to the
     17   // bounds of the view to determine the active zone. For example, if
     18   // |hot_zone_insets.bottom()| is 10, then the listener is not notified if
     19   // the y coordinate is between the origin of the view and height of the view
     20   // plus 10.
     21   MouseWatcherViewHost(View* view, const gfx::Insets& hot_zone_insets);
     22   virtual ~MouseWatcherViewHost();
     23 
     24   // MouseWatcherHost.
     25   virtual bool Contains(const gfx::Point& screen_point,
     26                         MouseEventType type) OVERRIDE;
     27 
     28  private:
     29   bool IsCursorInViewZone(const gfx::Point& screen_point);
     30   bool IsMouseOverWindow();
     31 
     32   // View we're listening for events over.
     33   View* view_;
     34   // Insets added to the bounds of the view.
     35   const gfx::Insets hot_zone_insets_;
     36 
     37   DISALLOW_COPY_AND_ASSIGN(MouseWatcherViewHost);
     38 };
     39 
     40 }  // namespace views
     41 
     42 #endif  // UI_VIEWS_MOUSE_WATCHER_VIEW_HOST_H_
     43