src/ui/app_list/views/apps_container_view.cc

   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 #include "ui/app_list/views/apps_container_view.h"
   6
   7 #include <algorithm>
   8
   9 #include "ui/app_list/app_list_constants.h"
  10 #include "ui/app_list/app_list_folder_item.h"
  11 #include "ui/app_list/pagination_model.h"
  12 #include "ui/app_list/views/app_list_folder_view.h"
  13 #include "ui/app_list/views/app_list_item_view.h"
  14 #include "ui/app_list/views/app_list_main_view.h"
  15 #include "ui/app_list/views/apps_grid_view.h"
  16 #include "ui/compositor/scoped_layer_animation_settings.h"
  17 #include "ui/events/event.h"
  18 #include "ui/gfx/image/image_skia_operations.h"
  19 #include "ui/views/controls/image_view.h"
  20
  21 namespace app_list {
  22
  23 namespace {
  24
  25 // Transitional view used for top item icons animation when opening or closing
  26 // a folder.
  27 class TopIconAnimationView : public views::View,
  28                              public ui::ImplicitAnimationObserver {
  29  public:
  30   TopIconAnimationView(const gfx::ImageSkia& icon,
  31                        const gfx::Rect& scaled_rect,
  32                        bool open_folder)
  33       : icon_size_(kPreferredIconDimension, kPreferredIconDimension),
  34         icon_(new views::ImageView),
  35         scaled_rect_(scaled_rect),
  36         open_folder_(open_folder) {
  37     DCHECK(!icon.isNull());
  38     gfx::ImageSkia resized(gfx::ImageSkiaOperations::CreateResizedImage(
  39           icon,
  40           skia::ImageOperations::RESIZE_BEST, icon_size_));
  41     icon_->SetImage(resized);
  42     AddChildView(icon_);
  43
  44 #if defined(USE_AURA)
  45     SetPaintToLayer(true);
  46     SetFillsBoundsOpaquely(false);
  47 #endif
  48   }
  49   virtual ~TopIconAnimationView() {}
  50
  51   void AddObserver(TopIconAnimationObserver* observer) {
  52     observers_.AddObserver(observer);
  53   }
  54
  55   void RemoveObserver(TopIconAnimationObserver* observer) {
  56     observers_.RemoveObserver(observer);
  57   }
  58
  59   void TransformView() {
  60     // Transform used for scaling down the icon and move it back inside to the
  61     // original folder icon.
  62     const float kIconTransformScale = 0.33333f;
  63     gfx::Transform transform;
  64     transform.Translate(scaled_rect_.x() - layer()->bounds().x(),
  65                         scaled_rect_.y() - layer()->bounds().y());
  66     transform.Scale(kIconTransformScale, kIconTransformScale);
  67
  68     if (open_folder_) {
  69       // Transform to a scaled down icon inside the original folder icon.
  70       layer()->SetTransform(transform);
  71     }
  72
  73     // Animate the icon to its target location and scale when opening or
  74     // closing a folder.
  75     ui::ScopedLayerAnimationSettings settings(layer()->GetAnimator());
  76     settings.AddObserver(this);
  77     settings.SetTransitionDuration(
  78         base::TimeDelta::FromMilliseconds(kFolderTransitionInDurationMs));
  79     layer()->SetTransform(open_folder_ ? gfx::Transform() : transform);
  80   }
  81
  82  private:
  83   // views::View overrides:
  84   virtual gfx::Size GetPreferredSize() OVERRIDE {
  85     return icon_size_;
  86   }
  87
  88   virtual void Layout() OVERRIDE {
  89     icon_->SetBoundsRect(GetContentsBounds());
  90   }
  91
  92   // ui::ImplicitAnimationObserver overrides:
  93   virtual void OnImplicitAnimationsCompleted() OVERRIDE {
  94     SetVisible(false);
  95     FOR_EACH_OBSERVER(TopIconAnimationObserver,
  96                       observers_,
  97                       OnTopIconAnimationsComplete(this));
  98   }
  99
 100   gfx::Size icon_size_;
 101   views::ImageView* icon_;  // Owned by views hierarchy.
 102   // Rect of the scaled down top item icon inside folder icon's ink bubble.
 103   gfx::Rect scaled_rect_;
 104   // True: opening folder; False: closing folder.
 105   bool open_folder_;
 106
 107   ObserverList<TopIconAnimationObserver> observers_;
 108
 109   DISALLOW_COPY_AND_ASSIGN(TopIconAnimationView);
 110 };
 111
 112 }  // namespace
 113
 114 AppsContainerView::AppsContainerView(AppListMainView* app_list_main_view,
 115                                      PaginationModel* pagination_model,
 116                                      AppListModel* model,
 117                                      content::WebContents* start_page_contents)
 118     : model_(model),
 119       show_state_(SHOW_APPS) {
 120   apps_grid_view_ = new AppsGridView(
 121       app_list_main_view, pagination_model, start_page_contents);
 122   apps_grid_view_->SetLayout(kPreferredIconDimension,
 123                              kPreferredCols,
 124                              kPreferredRows);
 125   AddChildView(apps_grid_view_);
 126
 127   app_list_folder_view_ = new AppListFolderView(
 128       this,
 129       model,
 130       app_list_main_view,
 131       start_page_contents);
 132   AddChildView(app_list_folder_view_);
 133
 134   apps_grid_view_->SetModel(model_);
 135   apps_grid_view_->SetItemList(model_->item_list());
 136 }
 137
 138 AppsContainerView::~AppsContainerView() {
 139 }
 140
 141 void AppsContainerView::ShowActiveFolder(AppListFolderItem* folder_item) {
 142   app_list_folder_view_->SetAppListFolderItem(folder_item);
 143   SetShowState(SHOW_ACTIVE_FOLDER);
 144
 145   CreateViewsForFolderTopItemsAnimation(folder_item, true);
 146 }
 147
 148 void AppsContainerView::ShowApps(AppListFolderItem* folder_item) {
 149   CreateViewsForFolderTopItemsAnimation(folder_item, false);
 150   // Hide the active folder view until the animation completes.
 151   apps_grid_view_->activated_item_view()->SetVisible(false);
 152   SetShowState(SHOW_APPS);
 153 }
 154
 155 gfx::Size AppsContainerView::GetPreferredSize() {
 156   const gfx::Size grid_size = apps_grid_view_->GetPreferredSize();
 157   const gfx::Size folder_view_size = app_list_folder_view_->GetPreferredSize();
 158
 159   int width = std::max(grid_size.width(), folder_view_size.width());
 160   int height = std::max(grid_size.height(), folder_view_size.height());
 161   return gfx::Size(width, height);
 162 }
 163
 164 void AppsContainerView::Layout() {
 165   gfx::Rect rect(GetContentsBounds());
 166   if (rect.IsEmpty())
 167     return;
 168
 169   switch (show_state_) {
 170     case SHOW_APPS:
 171       app_list_folder_view_->ScheduleShowHideAnimation(false);
 172       apps_grid_view_->SetBoundsRect(rect);
 173       apps_grid_view_->ScheduleShowHideAnimation(true);
 174       break;
 175     case SHOW_ACTIVE_FOLDER:
 176       apps_grid_view_->ScheduleShowHideAnimation(false);
 177       app_list_folder_view_->SetBoundsRect(rect);
 178       app_list_folder_view_->ScheduleShowHideAnimation(true);
 179       break;
 180     default:
 181       NOTREACHED();
 182   }
 183 }
 184
 185 bool AppsContainerView::OnKeyPressed(const ui::KeyEvent& event) {
 186   if (show_state_ == SHOW_APPS)
 187     return apps_grid_view_->OnKeyPressed(event);
 188   else
 189     return app_list_folder_view_->OnKeyPressed(event);
 190 }
 191
 192 void AppsContainerView::OnTopIconAnimationsComplete(views::View* icon_view) {
 193   bool animations_done = true;
 194   for (size_t i = 0; i < top_icon_views_.size(); ++i) {
 195     if (top_icon_views_[i]->visible()) {
 196       animations_done = false;
 197       break;
 198     }
 199   }
 200
 201   if (animations_done) {
 202     // Clean up the transitional views using for top item icon animation.
 203     for (size_t i = 0; i < top_icon_views_.size(); ++i) {
 204       TopIconAnimationView* icon_view =
 205           static_cast<TopIconAnimationView*>(top_icon_views_[i]);
 206       icon_view->RemoveObserver(this);
 207       delete icon_view;
 208     }
 209     top_icon_views_.clear();
 210
 211     // Show the folder icon when closing the folder.
 212     if (show_state_ == SHOW_APPS && apps_grid_view_->activated_item_view())
 213       apps_grid_view_->activated_item_view()->SetVisible(true);
 214   }
 215 }
 216
 217 void AppsContainerView::SetShowState(ShowState show_state) {
 218   if (show_state_ == show_state)
 219     return;
 220
 221   show_state_ = show_state;
 222   Layout();
 223 }
 224
 225 Rects AppsContainerView::GetTopItemIconBoundsInActiveFolder() {
 226   // Get the active folder's icon bounds relative to AppsContainerView.
 227   AppListItemView* folder_view = apps_grid_view_->activated_item_view();
 228   gfx::Rect to_grid_view = folder_view->ConvertRectToParent(
 229       folder_view->GetIconBounds());
 230   gfx::Rect to_container = apps_grid_view_->ConvertRectToParent(to_grid_view);
 231
 232   return AppListFolderItem::GetTopIconsBounds(to_container);
 233 }
 234
 235 void AppsContainerView::CreateViewsForFolderTopItemsAnimation(
 236     AppListFolderItem* active_folder,
 237     bool open_folder) {
 238   top_icon_views_.clear();
 239   std::vector<gfx::Rect> top_items_bounds =
 240       GetTopItemIconBoundsInActiveFolder();
 241   size_t top_items_count =
 242       std::min(kNumFolderTopItems, active_folder->item_list()->item_count());
 243   for (size_t i = 0; i < top_items_count; ++i) {
 244     TopIconAnimationView* icon_view = new TopIconAnimationView(
 245         active_folder->GetTopIcon(i), top_items_bounds[i], open_folder);
 246     icon_view->AddObserver(this);
 247     top_icon_views_.push_back(icon_view);
 248
 249     // Add the transitional views into child views, and set its bounds to the
 250     // same location of the item in the folder list view.
 251     AddChildView(top_icon_views_[i]);
 252     top_icon_views_[i]->SetBoundsRect(
 253         app_list_folder_view_->ConvertRectToParent(
 254             app_list_folder_view_->GetItemIconBoundsAt(i)));
 255     static_cast<TopIconAnimationView*>(top_icon_views_[i])->TransformView();
 256   }
 257 }
 258
 259 }  // namespace app_list