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      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 UI_APP_LIST_VIEWS_APPS_CONTAINER_VIEW_H_
      6 #define UI_APP_LIST_VIEWS_APPS_CONTAINER_VIEW_H_
      7 
      8 #include <vector>
      9 
     10 #include "ui/app_list/app_list_folder_item.h"
     11 #include "ui/app_list/views/top_icon_animation_view.h"
     12 #include "ui/views/view.h"
     13 
     14 namespace app_list {
     15 
     16 class AppsGridView;
     17 class ApplicationDragAndDropHost;
     18 class AppListFolderItem;
     19 class AppListFolderView;
     20 class AppListMainView;
     21 class AppListModel;
     22 class ContentsView;
     23 class FolderBackgroundView;
     24 
     25 // AppsContainerView contains a root level AppsGridView to render the root level
     26 // app items, and a AppListFolderView to render the app items inside the
     27 // active folder. Only one if them is visible to user at any time.
     28 class AppsContainerView : public views::View,
     29                           public TopIconAnimationObserver {
     30  public:
     31   AppsContainerView(AppListMainView* app_list_main_view,
     32                     AppListModel* model);
     33   virtual ~AppsContainerView();
     34 
     35   // Shows the active folder content specified by |folder_item|.
     36   void ShowActiveFolder(AppListFolderItem* folder_item);
     37 
     38   // Shows the root level apps list. This is called when UI navigate back from
     39   // a folder view with |folder_item|. If |folder_item| is NULL skips animation.
     40   void ShowApps(AppListFolderItem* folder_item);
     41 
     42   // Resets the app list to a state where it shows the main grid view. This is
     43   // called when the user opens the launcher for the first time or when the user
     44   // hides and then shows it. This is necessary because we only hide and show
     45   // the launcher on Windows and Linux so we need to reset to a fresh state.
     46   void ResetForShowApps();
     47 
     48   // Sets |drag_and_drop_host_| for the current app list in both
     49   // app_list_folder_view_ and root level apps_grid_view_.
     50   void SetDragAndDropHostOfCurrentAppList(
     51       ApplicationDragAndDropHost* drag_and_drop_host);
     52 
     53   // Transits the UI from folder view to root lelve apps grid view when
     54   // re-parenting a child item of |folder_item|.
     55   void ReparentFolderItemTransit(AppListFolderItem* folder_item);
     56 
     57   // Returns true if it is currently showing an active folder page.
     58   bool IsInFolderView() const;
     59 
     60   // views::View overrides:
     61   virtual gfx::Size GetPreferredSize() const OVERRIDE;
     62   virtual void Layout() OVERRIDE;
     63   virtual bool OnKeyPressed(const ui::KeyEvent& event) OVERRIDE;
     64 
     65   // TopIconAnimationObserver overrides:
     66   virtual void OnTopIconAnimationsComplete() OVERRIDE;
     67 
     68   AppsGridView* apps_grid_view() { return apps_grid_view_; }
     69   FolderBackgroundView* folder_background_view() {
     70      return folder_background_view_;
     71   }
     72   AppListFolderView* app_list_folder_view() { return app_list_folder_view_; }
     73 
     74  private:
     75   enum ShowState {
     76     SHOW_NONE,  // initial state
     77     SHOW_APPS,
     78     SHOW_ACTIVE_FOLDER,
     79     SHOW_ITEM_REPARENT,
     80   };
     81 
     82   void SetShowState(ShowState show_state, bool show_apps_with_animation);
     83 
     84   // Calculates the top item icon bounds in the active folder icon. The bounds
     85   // is relative to AppsContainerView.
     86   // Returns the bounds of top items' icon in sequence of top left, top right,
     87   // bottom left, bottom right.
     88   Rects GetTopItemIconBoundsInActiveFolder();
     89 
     90   // Creates the transitional views for animating the top items in the folder
     91   // when opening or closing a folder.
     92   void CreateViewsForFolderTopItemsAnimation(
     93       AppListFolderItem* active_folder, bool open_folder);
     94 
     95   void PrepareToShowApps(AppListFolderItem* folder_item);
     96 
     97   AppListModel* model_;
     98   AppsGridView* apps_grid_view_;  // Owned by views hierarchy.
     99   AppListFolderView* app_list_folder_view_;  // Owned by views hierarchy.
    100   FolderBackgroundView* folder_background_view_;  // Owned by views hierarchy.
    101   ShowState show_state_;
    102 
    103   // The transitional views for animating the top items in folder
    104   // when opening or closing a folder.
    105   std::vector<views::View*> top_icon_views_;
    106 
    107   size_t top_icon_animation_pending_count_;
    108 
    109   DISALLOW_COPY_AND_ASSIGN(AppsContainerView);
    110 };
    111 
    112 }  // namespace app_list
    113 
    114 
    115 #endif  // UI_APP_LIST_VIEWS_APPS_CONTAINER_VIEW_H_
    116