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      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_FOLDER_BACKGROUND_VIEW_H_
      6 #define UI_APP_LIST_VIEWS_FOLDER_BACKGROUND_VIEW_H_
      7 
      8 #include "ui/compositor/layer_animation_observer.h"
      9 #include "ui/views/view.h"
     10 
     11 namespace app_list {
     12 
     13 class AppListFolderView;
     14 
     15 // Draws the ink bubble indicating the boundary of the folder when user drags an
     16 // item inside a folder.
     17 class FolderBackgroundView : public views::View,
     18                              public ui::ImplicitAnimationObserver {
     19  public:
     20   enum ShowState {
     21     NO_BUBBLE,
     22     SHOW_BUBBLE,
     23     HIDE_BUBBLE,
     24   };
     25 
     26   FolderBackgroundView();
     27   virtual ~FolderBackgroundView();
     28 
     29   // Updates the ink bubble's ShowState.
     30   void UpdateFolderContainerBubble(ShowState state);
     31 
     32   // Returns the radius of the folder container ink bubble.
     33   int GetFolderContainerBubbleRadius() const;
     34 
     35   void set_folder_view(AppListFolderView* folder_view) {
     36     folder_view_ = folder_view;
     37   }
     38 
     39  private:
     40   // views::View overrides:
     41   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
     42 
     43   // ui::ImplicitAnimationObserver overrides:
     44   virtual void OnImplicitAnimationsCompleted() OVERRIDE;
     45 
     46   AppListFolderView* folder_view_;
     47   ShowState show_state_;
     48 
     49   DISALLOW_COPY_AND_ASSIGN(FolderBackgroundView);
     50 };
     51 
     52 }  // namespace app_list
     53 
     54 #endif  // UI_APP_LIST_VIEWS_FOLDER_BACKGROUND_VIEW_H_
     55