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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_APP_LIST_MAIN_VIEW_H_
      6 #define UI_APP_LIST_VIEWS_APP_LIST_MAIN_VIEW_H_
      7 
      8 #include <string>
      9 
     10 #include "base/memory/scoped_vector.h"
     11 #include "base/memory/weak_ptr.h"
     12 #include "base/timer/timer.h"
     13 #include "ui/app_list/app_list_export.h"
     14 #include "ui/app_list/views/apps_grid_view_delegate.h"
     15 #include "ui/app_list/views/search_box_view_delegate.h"
     16 #include "ui/app_list/views/search_result_list_view_delegate.h"
     17 #include "ui/views/view.h"
     18 
     19 namespace views {
     20 class Widget;
     21 }
     22 
     23 namespace app_list {
     24 
     25 class AppListItem;
     26 class AppListModel;
     27 class AppListViewDelegate;
     28 class ApplicationDragAndDropHost;
     29 class ContentsSwitcherView;
     30 class ContentsView;
     31 class PaginationModel;
     32 class SearchBoxView;
     33 
     34 // AppListMainView contains the normal view of the app list, which is shown
     35 // when the user is signed in.
     36 class APP_LIST_EXPORT AppListMainView : public views::View,
     37                                         public AppsGridViewDelegate,
     38                                         public SearchBoxViewDelegate,
     39                                         public SearchResultListViewDelegate {
     40  public:
     41   // Takes ownership of |delegate|.
     42   explicit AppListMainView(AppListViewDelegate* delegate,
     43                            int initial_apps_page,
     44                            gfx::NativeView parent);
     45   virtual ~AppListMainView();
     46 
     47   void ShowAppListWhenReady();
     48 
     49   void ResetForShow();
     50 
     51   void Close();
     52 
     53   void Prerender();
     54 
     55   void ModelChanged();
     56 
     57   void UpdateSearchBoxVisibility();
     58 
     59   void OnStartPageSearchTextfieldChanged(const base::string16& new_contents);
     60 
     61   SearchBoxView* search_box_view() const { return search_box_view_; }
     62 
     63   // If |drag_and_drop_host| is not NULL it will be called upon drag and drop
     64   // operations outside the application list.
     65   void SetDragAndDropHostOfCurrentAppList(
     66       ApplicationDragAndDropHost* drag_and_drop_host);
     67 
     68   ContentsView* contents_view() const { return contents_view_; }
     69   ContentsSwitcherView* contents_switcher_view() const {
     70     return contents_switcher_view_;
     71   }
     72   AppListModel* model() { return model_; }
     73 
     74   // Returns true if the app list should be centered and in landscape mode.
     75   bool ShouldCenterWindow() const;
     76 
     77   // Called when the search box's visibility is changed.
     78   void NotifySearchBoxVisibilityChanged();
     79 
     80  private:
     81   class IconLoader;
     82 
     83   // Adds the ContentsView and the ContentsSwitcherView.
     84   void AddContentsViews();
     85 
     86   // Gets the PaginationModel owned by the AppsGridView.
     87   PaginationModel* GetAppsPaginationModel();
     88 
     89   // Loads icon image for the apps in the selected page of |pagination_model_|.
     90   // |parent| is used to determine the image scale factor to use.
     91   void PreloadIcons(gfx::NativeView parent);
     92 
     93   // Invoked when |icon_loading_wait_timer_| fires.
     94   void OnIconLoadingWaitTimer();
     95 
     96   // Invoked from an IconLoader when icon loading is finished.
     97   void OnItemIconLoaded(IconLoader* loader);
     98 
     99   // Overridden from AppsGridViewDelegate:
    100   virtual void ActivateApp(AppListItem* item, int event_flags) OVERRIDE;
    101   virtual void GetShortcutPathForApp(
    102       const std::string& app_id,
    103       const base::Callback<void(const base::FilePath&)>& callback) OVERRIDE;
    104   virtual void CancelDragInActiveFolder() OVERRIDE;
    105 
    106   // Overridden from SearchBoxViewDelegate:
    107   virtual void QueryChanged(SearchBoxView* sender) OVERRIDE;
    108 
    109   // Overridden from SearchResultListViewDelegate:
    110   virtual void OnResultInstalled(SearchResult* result) OVERRIDE;
    111   virtual void OnResultUninstalled(SearchResult* result) OVERRIDE;
    112 
    113   AppListViewDelegate* delegate_;  // Owned by parent view (AppListView).
    114   AppListModel* model_;  // Unowned; ownership is handled by |delegate_|.
    115 
    116   SearchBoxView* search_box_view_;  // Owned by views hierarchy.
    117   ContentsView* contents_view_;  // Owned by views hierarchy.
    118 
    119   // Owned by views hierarchy. NULL in the non-experimental app list.
    120   ContentsSwitcherView* contents_switcher_view_;
    121 
    122   // A timer that fires when maximum allowed time to wait for icon loading has
    123   // passed.
    124   base::OneShotTimer<AppListMainView> icon_loading_wait_timer_;
    125 
    126   ScopedVector<IconLoader> pending_icon_loaders_;
    127 
    128   base::WeakPtrFactory<AppListMainView> weak_ptr_factory_;
    129 
    130   DISALLOW_COPY_AND_ASSIGN(AppListMainView);
    131 };
    132 
    133 }  // namespace app_list
    134 
    135 #endif  // UI_APP_LIST_VIEWS_APP_LIST_MAIN_VIEW_H_
    136