ash/shelf/shelf_layout_manager_observer.h

   1 // Copyright 2013 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 ASH_SHELF_SHELF_LAYOUT_MANAGER_OBSERVER_H_
   6 #define ASH_SHELF_SHELF_LAYOUT_MANAGER_OBSERVER_H_
   7
   8 #include "ash/ash_export.h"
   9 #include "ash/shelf/background_animator.h"
  10 #include "ash/shelf/shelf_types.h"
  11
  12 namespace aura {
  13 class Window;
  14 }
  15
  16 namespace ash {
  17
  18 class ASH_EXPORT ShelfLayoutManagerObserver {
  19  public:
  20   virtual ~ShelfLayoutManagerObserver() {}
  21
  22   // Called when the target ShelfLayoutManager will be deleted.
  23   virtual void WillDeleteShelf() {}
  24
  25   // Called when the visibility change is scheduled.
  26   virtual void WillChangeVisibilityState(ShelfVisibilityState new_state) {}
  27
  28   // Called when the auto hide state is changed.
  29   virtual void OnAutoHideStateChanged(ShelfAutoHideState new_state) {}
  30
  31   // Called when the auto hide behavior is changed.
  32   virtual void OnAutoHideBehaviorChanged(aura::Window* root_window,
  33                                          ShelfAutoHideBehavior new_behavior) {}
  34
  35   // Called when shelf background animation is started.
  36   virtual void OnBackgroundUpdated(
  37       ShelfBackgroundType background_type,
  38       BackgroundAnimatorChangeType change_type) {}
  39 };
  40
  41 }  // namespace ash
  42
  43 #endif  // ASH_SHELF_SHELF_LAYOUT_MANAGER_OBSERVER_H_