ui/app_list/views/start_page_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_START_PAGE_VIEW_H_
   6 #define UI_APP_LIST_VIEWS_START_PAGE_VIEW_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/memory/weak_ptr.h"
  10 #include "ui/app_list/app_list_export.h"
  11 #include "ui/app_list/app_list_model.h"
  12 #include "ui/app_list/app_list_view_delegate_observer.h"
  13 #include "ui/app_list/views/search_box_view_delegate.h"
  14 #include "ui/base/models/list_model_observer.h"
  15 #include "ui/views/view.h"
  16
  17 namespace app_list {
  18
  19 class AppListMainView;
  20 class AppListViewDelegate;
  21 class SearchResultListView;
  22 class TileItemView;
  23
  24 // The start page for the experimental app list.
  25 class APP_LIST_EXPORT StartPageView : public views::View,
  26                                       public ui::ListModelObserver,
  27                                       public SearchBoxViewDelegate {
  28  public:
  29   StartPageView(AppListMainView* app_list_main_view,
  30                 AppListViewDelegate* view_delegate);
  31   virtual ~StartPageView();
  32
  33   void Reset();
  34   void ShowSearchResults();
  35
  36   bool IsShowingSearchResults() const;
  37
  38   void UpdateForTesting();
  39
  40   const std::vector<TileItemView*>& tile_views() const { return tile_views_; }
  41   SearchBoxView* dummy_search_box_view() { return search_box_view_; }
  42
  43   // Overridden from views::View:
  44   virtual bool OnKeyPressed(const ui::KeyEvent& event) override;
  45   virtual void Layout() override;
  46
  47  private:
  48   enum ShowState {
  49     SHOW_START_PAGE,
  50     SHOW_SEARCH_RESULTS,
  51   };
  52
  53   void InitInstantContainer();
  54   void InitTilesContainer();
  55
  56   void SetShowState(ShowState show_state);
  57   void SetModel(AppListModel* model);
  58
  59   // Updates UI with model.
  60   void Update();
  61
  62   // Schedules an Update() call using |update_factory_|. Does nothing if there
  63   // is a pending call.
  64   void ScheduleUpdate();
  65
  66   // Overridden from SearchBoxViewDelegate:
  67   virtual void QueryChanged(SearchBoxView* sender) override;
  68
  69   // Overridden from ui::ListModelObserver:
  70   virtual void ListItemsAdded(size_t start, size_t count) override;
  71   virtual void ListItemsRemoved(size_t start, size_t count) override;
  72   virtual void ListItemMoved(size_t index, size_t target_index) override;
  73   virtual void ListItemsChanged(size_t start, size_t count) override;
  74
  75   // The parent view of ContentsView which is the parent of this view.
  76   AppListMainView* app_list_main_view_;
  77
  78   AppListModel::SearchResults*
  79       search_results_model_;  // Owned by AppListSyncableService.
  80
  81   AppListViewDelegate* view_delegate_;  // Owned by AppListView.
  82
  83   SearchBoxView* search_box_view_;      // Owned by views hierarchy.
  84   SearchResultListView* results_view_;  // Owned by views hierarchy.
  85   views::View* instant_container_;  // Owned by views hierarchy.
  86   views::View* tiles_container_;    // Owned by views hierarchy.
  87
  88   std::vector<TileItemView*> tile_views_;
  89
  90   ShowState show_state_;
  91
  92   // ScheduleUpdate() generates a single weak pointer; if one exists then an
  93   // update is pending. Further calls to ScheduleUpdate() will have no effect.
  94   // Once the Update() completes, the weak pointer is invalidated.
  95   base::WeakPtrFactory<StartPageView> update_factory_;
  96
  97   DISALLOW_COPY_AND_ASSIGN(StartPageView);
  98 };
  99
 100 }  // namespace app_list
 101
 102 #endif  // UI_APP_LIST_VIEWS_START_PAGE_VIEW_H_