ui/app_list/views/top_icon_animation_view.h

   1 // Copyright 2014 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_APP_LIST_VIEWS_TOP_ICON_ANIMATION_VIEW_H_
   6 #define UI_APP_LIST_VIEWS_TOP_ICON_ANIMATION_VIEW_H_
   7
   8 #include "base/observer_list.h"
   9 #include "ui/compositor/layer_animation_observer.h"
  10 #include "ui/views/view.h"
  11
  12 namespace views {
  13 class ImageView;
  14 }
  15
  16 namespace app_list {
  17
  18 // Observer for top icon animation completion.
  19 class TopIconAnimationObserver {
  20  public:
  21   // Called when top icon animation completes.
  22   virtual void OnTopIconAnimationsComplete() {}
  23
  24  protected:
  25   TopIconAnimationObserver() {}
  26   virtual ~TopIconAnimationObserver() {}
  27
  28  private:
  29   DISALLOW_COPY_AND_ASSIGN(TopIconAnimationObserver);
  30 };
  31
  32 // Transitional view used for top item icons animation when opening or closing
  33 // a folder. Owns itself.
  34 class TopIconAnimationView : public views::View,
  35                              public ui::ImplicitAnimationObserver {
  36  public:
  37   // |icon|: The icon image of the item icon of full scale size.
  38   // |scaled_rect|: Bounds of the small icon inside folder icon.
  39   // |open_folder|: Specify open/close folder animation to perform.
  40   // The view will be self-cleaned by the end of animation.
  41   TopIconAnimationView(const gfx::ImageSkia& icon,
  42                        const gfx::Rect& scaled_rect,
  43                        bool open_folder);
  44   ~TopIconAnimationView() override;
  45
  46   void AddObserver(TopIconAnimationObserver* observer);
  47   void RemoveObserver(TopIconAnimationObserver* observer);
  48
  49   // When opening a folder, transform the top item icon from the small icon
  50   // inside folder icon to the full scale icon at the target location.
  51   // When closing a folder, transform the full scale item icon from its
  52   // location to the small icon inside the folder icon.
  53   void TransformView();
  54
  55  private:
  56   // views::View overrides:
  57   gfx::Size GetPreferredSize() const override;
  58   void Layout() override;
  59
  60   // ui::ImplicitAnimationObserver overrides:
  61   void OnImplicitAnimationsCompleted() override;
  62   bool RequiresNotificationWhenAnimatorDestroyed() const override;
  63
  64   gfx::Size icon_size_;
  65   views::ImageView* icon_;  // Owned by views hierarchy.
  66   // Rect of the scaled down top item icon inside folder icon's ink bubble.
  67   gfx::Rect scaled_rect_;
  68   // true: opening folder; false: closing folder.
  69   bool open_folder_;
  70
  71   base::ObserverList<TopIconAnimationObserver> observers_;
  72
  73   DISALLOW_COPY_AND_ASSIGN(TopIconAnimationView);
  74 };
  75
  76 }  // namespace app_list
  77
  78 #endif  // UI_APP_LIST_VIEWS_TOP_ICON_ANIMATION_VIEW_H_