ui/app_list/views/app_list_main_view.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 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/app_list_model_observer.h"
  15 #include "ui/app_list/views/apps_grid_view_delegate.h"
  16 #include "ui/app_list/views/search_box_view_delegate.h"
  17 #include "ui/app_list/views/search_result_list_view_delegate.h"
  18 #include "ui/views/view.h"
  19
  20 namespace views {
  21 class Widget;
  22 }
  23
  24 namespace app_list {
  25
  26 class AppListItem;
  27 class AppListModel;
  28 class AppListViewDelegate;
  29 class ApplicationDragAndDropHost;
  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 AppListModelObserver,
  39                                         public SearchBoxViewDelegate,
  40                                         public SearchResultListViewDelegate {
  41  public:
  42   explicit AppListMainView(AppListViewDelegate* delegate);
  43   ~AppListMainView() override;
  44
  45   void Init(gfx::NativeView parent,
  46             int initial_apps_page,
  47             SearchBoxView* search_box_view);
  48
  49   void ShowAppListWhenReady();
  50
  51   void ResetForShow();
  52
  53   void Close();
  54
  55   void Prerender();
  56
  57   void ModelChanged();
  58
  59   SearchBoxView* search_box_view() const { return search_box_view_; }
  60
  61   // Gets the invisible widget that sits partly over the bottom of the app list,
  62   // covering the collapsed-state custom page. May return nullptr, if the widget
  63   // has not been initialized or has already been destroyed.
  64   views::Widget* GetCustomPageClickzone() const;
  65
  66   // If |drag_and_drop_host| is not NULL it will be called upon drag and drop
  67   // operations outside the application list.
  68   void SetDragAndDropHostOfCurrentAppList(
  69       ApplicationDragAndDropHost* drag_and_drop_host);
  70
  71   ContentsView* contents_view() const { return contents_view_; }
  72   AppListModel* model() { return model_; }
  73   AppListViewDelegate* view_delegate() { return delegate_; }
  74
  75   // Returns true if the app list should be centered and in landscape mode.
  76   bool ShouldCenterWindow() const;
  77
  78   // Called when the search box's visibility is changed.
  79   void NotifySearchBoxVisibilityChanged();
  80
  81   // Initialize widgets that live inside the app list's main widget.
  82   void InitWidgets();
  83
  84   // Overridden from AppListModelObserver:
  85   void OnCustomLauncherPageEnabledStateChanged(bool enabled) override;
  86
  87  private:
  88   class IconLoader;
  89
  90   // Adds the ContentsView.
  91   void AddContentsViews();
  92
  93   // Gets the PaginationModel owned by the AppsGridView.
  94   PaginationModel* GetAppsPaginationModel();
  95
  96   // Loads icon image for the apps in the selected page of |pagination_model_|.
  97   // |parent| is used to determine the image scale factor to use.
  98   void PreloadIcons(gfx::NativeView parent);
  99
 100   // Invoked when |icon_loading_wait_timer_| fires.
 101   void OnIconLoadingWaitTimer();
 102
 103   // Invoked from an IconLoader when icon loading is finished.
 104   void OnItemIconLoaded(IconLoader* loader);
 105
 106   // Overridden from AppsGridViewDelegate:
 107   void ActivateApp(AppListItem* item, int event_flags) override;
 108   void GetShortcutPathForApp(
 109       const std::string& app_id,
 110       const base::Callback<void(const base::FilePath&)>& callback) override;
 111   void CancelDragInActiveFolder() override;
 112
 113   // Overridden from SearchBoxViewDelegate:
 114   void QueryChanged(SearchBoxView* sender) override;
 115   void BackButtonPressed() override;
 116
 117   // Overridden from SearchResultListViewDelegate:
 118   void OnResultInstalled(SearchResult* result) override;
 119
 120   AppListViewDelegate* delegate_;  // Owned by parent view (AppListView).
 121   AppListModel* model_;  // Unowned; ownership is handled by |delegate_|.
 122
 123   // Created by AppListView. Owned by views hierarchy.
 124   SearchBoxView* search_box_view_;
 125   ContentsView* contents_view_;  // Owned by views hierarchy.
 126
 127   // Invisible widget that sits partly over the bottom of the app list, covering
 128   // the collapsed-state custom page, and intercepts click events. Always use
 129   // GetCustomPageClickzone() to access this (do not access it directly).
 130   views::Widget* custom_page_clickzone_;  // Owned by the app list widget.
 131
 132   // A timer that fires when maximum allowed time to wait for icon loading has
 133   // passed.
 134   base::OneShotTimer<AppListMainView> icon_loading_wait_timer_;
 135
 136   ScopedVector<IconLoader> pending_icon_loaders_;
 137
 138   base::WeakPtrFactory<AppListMainView> weak_ptr_factory_;
 139
 140   DISALLOW_COPY_AND_ASSIGN(AppListMainView);
 141 };
 142
 143 }  // namespace app_list
 144
 145 #endif  // UI_APP_LIST_VIEWS_APP_LIST_MAIN_VIEW_H_