ui/app_list/views/contents_view.h

   1 // Copyright (c) 2012 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_CONTENTS_VIEW_H_
   6 #define UI_APP_LIST_VIEWS_CONTENTS_VIEW_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/compiler_specific.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "ui/app_list/app_list_export.h"
  12 #include "ui/views/view.h"
  13
  14 namespace content {
  15 class WebContents;
  16 }
  17
  18 namespace views {
  19 class BoundsAnimator;
  20 class ViewModel;
  21 }
  22
  23 namespace app_list {
  24
  25 class AppsGridView;
  26 class ApplicationDragAndDropHost;
  27 class AppListFolderItem;
  28 class AppListMainView;
  29 class AppListModel;
  30 class AppListViewDelegate;
  31 class AppsContainerView;
  32 class PaginationModel;
  33 class StartPageView;
  34
  35 // A view to manage sub views under the search box (apps grid view + page
  36 // switcher and search results). The two sets of sub views are mutually
  37 // exclusive. ContentsView manages a show state to choose one set to show
  38 // and animates the transition between show states.
  39 class APP_LIST_EXPORT ContentsView : public views::View {
  40  public:
  41   enum ShowState {
  42     SHOW_APPS,
  43     SHOW_SEARCH_RESULTS,
  44     SHOW_START_PAGE,
  45   };
  46
  47   ContentsView(AppListMainView* app_list_main_view,
  48                PaginationModel* pagination_model,
  49                AppListModel* model,
  50                AppListViewDelegate* view_delegate);
  51   virtual ~ContentsView();
  52
  53   // The app list gets closed and drag and drop operations need to be cancelled.
  54   void CancelDrag();
  55
  56   // If |drag_and_drop| is not NULL it will be called upon drag and drop
  57   // operations outside the application list.
  58   void SetDragAndDropHostOfCurrentAppList(
  59       ApplicationDragAndDropHost* drag_and_drop_host);
  60
  61   void ShowSearchResults(bool show);
  62   void ShowFolderContent(AppListFolderItem* folder);
  63
  64   // Sets show state and animates the subviews to match the show state.
  65   void SetShowState(ShowState show_state);
  66
  67   void Prerender();
  68
  69   AppsContainerView* apps_container_view() { return apps_container_view_; }
  70   StartPageView* start_page_view() { return start_page_view_; }
  71
  72   ShowState show_state() const { return show_state_; }
  73
  74   // Overridden from views::View:
  75   virtual gfx::Size GetPreferredSize() const OVERRIDE;
  76   virtual void Layout() OVERRIDE;
  77   virtual bool OnKeyPressed(const ui::KeyEvent& event) OVERRIDE;
  78   virtual bool OnMouseWheel(const ui::MouseWheelEvent& event) OVERRIDE;
  79
  80  private:
  81   // Invoked when show state is changed.
  82   void ShowStateChanged();
  83
  84   void CalculateIdealBounds();
  85   void AnimateToIdealBounds();
  86
  87   // Overridden from ui::EventHandler:
  88   virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
  89   virtual void OnScrollEvent(ui::ScrollEvent* event) OVERRIDE;
  90
  91   ShowState show_state_;
  92   PaginationModel* pagination_model_;  // Owned by AppListController.
  93
  94   AppsContainerView* apps_container_view_;  // Owned by the views hierarchy.
  95   StartPageView* start_page_view_;          // Owned by the views hierarchy.
  96
  97   AppListMainView* app_list_main_view_;     // Parent view, owns this.
  98
  99   scoped_ptr<views::ViewModel> view_model_;
 100   scoped_ptr<views::BoundsAnimator> bounds_animator_;
 101
 102   DISALLOW_COPY_AND_ASSIGN(ContentsView);
 103 };
 104
 105 }  // namespace app_list
 106
 107 #endif  // UI_APP_LIST_VIEWS_CONTENTS_VIEW_H_