ui/app_list/views/app_list_folder_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/app_list_folder_view.h"
   6
   7 #include <algorithm>
   8
   9 #include "grit/ui_strings.h"
  10 #include "ui/accessibility/ax_view_state.h"
  11 #include "ui/app_list/app_list_constants.h"
  12 #include "ui/app_list/app_list_folder_item.h"
  13 #include "ui/app_list/app_list_model.h"
  14 #include "ui/app_list/pagination_model.h"
  15 #include "ui/app_list/views/app_list_item_view.h"
  16 #include "ui/app_list/views/app_list_main_view.h"
  17 #include "ui/app_list/views/apps_container_view.h"
  18 #include "ui/app_list/views/apps_grid_view.h"
  19 #include "ui/app_list/views/contents_view.h"
  20 #include "ui/app_list/views/folder_background_view.h"
  21 #include "ui/app_list/views/folder_header_view.h"
  22 #include "ui/app_list/views/search_box_view.h"
  23 #include "ui/compositor/scoped_layer_animation_settings.h"
  24 #include "ui/events/event.h"
  25 #include "ui/gfx/rect_conversions.h"
  26 #include "ui/views/controls/textfield/textfield.h"
  27 #include "ui/views/view_model.h"
  28 #include "ui/views/view_model_utils.h"
  29
  30 namespace app_list {
  31
  32 namespace {
  33
  34 // Indexes of interesting views in ViewModel of AppListFolderView.
  35 const int kIndexFolderHeader = 0;
  36 const int kIndexChildItems = 1;
  37
  38 // Threshold for the distance from the center of the item to the circle of the
  39 // folder container ink bubble, beyond which, the item is considered dragged
  40 // out of the folder boundary.
  41 const int kOutOfFolderContainerBubbleDelta = 30;
  42
  43 }  // namespace
  44
  45 AppListFolderView::AppListFolderView(AppsContainerView* container_view,
  46                                      AppListModel* model,
  47                                      AppListMainView* app_list_main_view)
  48     : container_view_(container_view),
  49       app_list_main_view_(app_list_main_view),
  50       folder_header_view_(new FolderHeaderView(this)),
  51       view_model_(new views::ViewModel),
  52       model_(model),
  53       folder_item_(NULL),
  54       pagination_model_(new PaginationModel),
  55       hide_for_reparent_(false) {
  56   AddChildView(folder_header_view_);
  57   view_model_->Add(folder_header_view_, kIndexFolderHeader);
  58
  59   items_grid_view_ =
  60       new AppsGridView(app_list_main_view_, pagination_model_.get());
  61   items_grid_view_->set_folder_delegate(this);
  62   items_grid_view_->SetLayout(
  63       kPreferredIconDimension,
  64       container_view->apps_grid_view()->cols(),
  65       container_view->apps_grid_view()->rows_per_page());
  66   items_grid_view_->SetModel(model);
  67   AddChildView(items_grid_view_);
  68   view_model_->Add(items_grid_view_, kIndexChildItems);
  69
  70 #if defined(USE_AURA)
  71   SetPaintToLayer(true);
  72   SetFillsBoundsOpaquely(false);
  73 #endif
  74
  75   model_->AddObserver(this);
  76 }
  77
  78 AppListFolderView::~AppListFolderView() {
  79   model_->RemoveObserver(this);
  80   // Make sure |items_grid_view_| is deleted before |pagination_model_|.
  81   RemoveAllChildViews(true);
  82 }
  83
  84 void AppListFolderView::SetAppListFolderItem(AppListFolderItem* folder) {
  85   accessible_name_ = ui::ResourceBundle::GetSharedInstance().GetLocalizedString(
  86       IDS_APP_LIST_FOLDER_OPEN_FOLDER_ACCESSIBILE_NAME);
  87   NotifyAccessibilityEvent(ui::AX_EVENT_ALERT, true);
  88
  89   folder_item_ = folder;
  90   items_grid_view_->SetItemList(folder_item_->item_list());
  91   folder_header_view_->SetFolderItem(folder_item_);
  92 }
  93
  94 void AppListFolderView::ScheduleShowHideAnimation(bool show,
  95                                                   bool hide_for_reparent) {
  96   hide_for_reparent_ = hide_for_reparent;
  97
  98   // Stop any previous animation.
  99   layer()->GetAnimator()->StopAnimating();
 100
 101   // Hide the top items temporarily if showing the view for opening the folder.
 102   if (show)
 103     items_grid_view_->SetTopItemViewsVisible(false);
 104
 105   // Set initial state.
 106   layer()->SetOpacity(show ? 0.0f : 1.0f);
 107   SetVisible(true);
 108   UpdateFolderNameVisibility(true);
 109
 110   ui::ScopedLayerAnimationSettings animation(layer()->GetAnimator());
 111   animation.SetTweenType(
 112       show ? kFolderFadeInTweenType : kFolderFadeOutTweenType);
 113   animation.AddObserver(this);
 114   animation.SetTransitionDuration(base::TimeDelta::FromMilliseconds(
 115       show ? kFolderTransitionInDurationMs : kFolderTransitionOutDurationMs));
 116
 117   layer()->SetOpacity(show ? 1.0f : 0.0f);
 118 }
 119
 120 gfx::Size AppListFolderView::GetPreferredSize() const {
 121   const gfx::Size header_size = folder_header_view_->GetPreferredSize();
 122   const gfx::Size grid_size = items_grid_view_->GetPreferredSize();
 123   int width = std::max(header_size.width(), grid_size.width());
 124   int height = header_size.height() + grid_size.height();
 125   return gfx::Size(width, height);
 126 }
 127
 128 void AppListFolderView::Layout() {
 129   CalculateIdealBounds();
 130   views::ViewModelUtils::SetViewBoundsToIdealBounds(*view_model_);
 131 }
 132
 133 bool AppListFolderView::OnKeyPressed(const ui::KeyEvent& event) {
 134   return items_grid_view_->OnKeyPressed(event);
 135 }
 136
 137 void AppListFolderView::OnAppListItemWillBeDeleted(AppListItem* item) {
 138   if (item == folder_item_) {
 139     items_grid_view_->OnFolderItemRemoved();
 140     folder_header_view_->OnFolderItemRemoved();
 141     folder_item_ = NULL;
 142
 143     // Do not change state if it is hidden.
 144     if (hide_for_reparent_ || layer()->opacity() == 0.0f)
 145       return;
 146
 147     // If the folder item associated with this view is removed from the model,
 148     // (e.g. the last item in the folder was deleted), reset the view and signal
 149     // the container view to show the app list instead.
 150     // Pass NULL to ShowApps() to avoid triggering animation from the deleted
 151     // folder.
 152     container_view_->ShowApps(NULL);
 153   }
 154 }
 155
 156 void AppListFolderView::OnImplicitAnimationsCompleted() {
 157   // Show the top items when the opening folder animation is done.
 158   if (layer()->opacity() == 1.0f)
 159     items_grid_view_->SetTopItemViewsVisible(true);
 160
 161   // If the view is hidden for reparenting a folder item, it has to be visible,
 162   // so that drag_view_ can keep receiving mouse events.
 163   if (layer()->opacity() == 0.0f && !hide_for_reparent_)
 164     SetVisible(false);
 165
 166   // Set the view bounds to a small rect, so that it won't overlap the root
 167   // level apps grid view during folder item reprenting transitional period.
 168   if (hide_for_reparent_)
 169     SetBoundsRect(gfx::Rect(bounds().x(), bounds().y(), 1, 1));
 170 }
 171
 172 void AppListFolderView::CalculateIdealBounds() {
 173   gfx::Rect rect(GetContentsBounds());
 174   if (rect.IsEmpty())
 175     return;
 176
 177   gfx::Rect header_frame(rect);
 178   gfx::Size size = folder_header_view_->GetPreferredSize();
 179   header_frame.set_height(size.height());
 180   view_model_->set_ideal_bounds(kIndexFolderHeader, header_frame);
 181
 182   gfx::Rect grid_frame(rect);
 183   grid_frame.Subtract(header_frame);
 184   view_model_->set_ideal_bounds(kIndexChildItems, grid_frame);
 185 }
 186
 187 void AppListFolderView::StartSetupDragInRootLevelAppsGridView(
 188     AppListItemView* original_drag_view,
 189     const gfx::Point& drag_point_in_root_grid) {
 190   // Converts the original_drag_view's bounds to the coordinate system of
 191   // root level grid view.
 192   gfx::RectF rect_f(original_drag_view->bounds());
 193   views::View::ConvertRectToTarget(items_grid_view_,
 194                                    container_view_->apps_grid_view(),
 195                                    &rect_f);
 196   gfx::Rect rect_in_root_grid_view = gfx::ToEnclosingRect(rect_f);
 197
 198   container_view_->apps_grid_view()->
 199       InitiateDragFromReparentItemInRootLevelGridView(
 200           original_drag_view, rect_in_root_grid_view, drag_point_in_root_grid);
 201 }
 202
 203 gfx::Rect AppListFolderView::GetItemIconBoundsAt(int index) {
 204   AppListItemView* item_view = items_grid_view_->GetItemViewAt(index);
 205   // Icon bounds relative to AppListItemView.
 206   const gfx::Rect icon_bounds = item_view->GetIconBounds();
 207   gfx::Rect to_apps_grid_view = item_view->ConvertRectToParent(icon_bounds);
 208   gfx::Rect to_folder =
 209       items_grid_view_->ConvertRectToParent(to_apps_grid_view);
 210
 211   // Get the icon image's bound.
 212   to_folder.ClampToCenteredSize(
 213       gfx::Size(kPreferredIconDimension, kPreferredIconDimension));
 214
 215   return to_folder;
 216 }
 217
 218 void AppListFolderView::UpdateFolderViewBackground(bool show_bubble) {
 219   if (hide_for_reparent_)
 220     return;
 221
 222   // Before showing the folder container inking bubble, hide the folder name.
 223   if (show_bubble)
 224     UpdateFolderNameVisibility(false);
 225
 226   container_view_->folder_background_view()->UpdateFolderContainerBubble(
 227       show_bubble ? FolderBackgroundView::SHOW_BUBBLE :
 228                     FolderBackgroundView::HIDE_BUBBLE);
 229 }
 230
 231 void AppListFolderView::UpdateFolderNameVisibility(bool visible) {
 232   folder_header_view_->UpdateFolderNameVisibility(visible);
 233 }
 234
 235 bool AppListFolderView::IsPointOutsideOfFolderBoundary(
 236     const gfx::Point& point) {
 237   if (!GetLocalBounds().Contains(point))
 238     return true;
 239
 240   gfx::Point center = GetLocalBounds().CenterPoint();
 241   float delta = (point - center).Length();
 242   return delta > container_view_->folder_background_view()->
 243       GetFolderContainerBubbleRadius() + kOutOfFolderContainerBubbleDelta;
 244 }
 245
 246 // When user drags a folder item out of the folder boundary ink bubble, the
 247 // folder view UI will be hidden, and switch back to top level AppsGridView.
 248 // The dragged item will seamlessly move on the top level AppsGridView.
 249 // In order to achieve the above, we keep the folder view and its child grid
 250 // view visible with opacity 0, so that the drag_view_ on the hidden grid view
 251 // will keep receiving mouse event. At the same time, we initiated a new
 252 // drag_view_ in the top level grid view, and keep it moving with the hidden
 253 // grid view's drag_view_, so that the dragged item can be engaged in drag and
 254 // drop flow in the top level grid view. During the reparenting process, the
 255 // drag_view_ in hidden grid view will dispatch the drag and drop event to
 256 // the top level grid view, until the drag ends.
 257 void AppListFolderView::ReparentItem(
 258     AppListItemView* original_drag_view,
 259     const gfx::Point& drag_point_in_folder_grid) {
 260   // Convert the drag point relative to the root level AppsGridView.
 261   gfx::Point to_root_level_grid = drag_point_in_folder_grid;
 262   ConvertPointToTarget(items_grid_view_,
 263                        container_view_->apps_grid_view(),
 264                        &to_root_level_grid);
 265   StartSetupDragInRootLevelAppsGridView(original_drag_view, to_root_level_grid);
 266   container_view_->ReparentFolderItemTransit(folder_item_);
 267 }
 268
 269 void AppListFolderView::DispatchDragEventForReparent(
 270     AppsGridView::Pointer pointer,
 271     const gfx::Point& drag_point_in_folder_grid) {
 272   AppsGridView* root_grid = container_view_->apps_grid_view();
 273   gfx::Point drag_point_in_root_grid = drag_point_in_folder_grid;
 274   ConvertPointToTarget(items_grid_view_, root_grid, &drag_point_in_root_grid);
 275   root_grid->UpdateDragFromReparentItem(pointer, drag_point_in_folder_grid);
 276 }
 277
 278 void AppListFolderView::DispatchEndDragEventForReparent(
 279     bool events_forwarded_to_drag_drop_host,
 280     bool cancel_drag) {
 281   container_view_->apps_grid_view()->EndDragFromReparentItemInRootLevel(
 282       events_forwarded_to_drag_drop_host, cancel_drag);
 283 }
 284
 285 void AppListFolderView::HideViewImmediately() {
 286   SetVisible(false);
 287   hide_for_reparent_ = false;
 288 }
 289
 290 void AppListFolderView::CloseFolderPage() {
 291   accessible_name_ = ui::ResourceBundle::GetSharedInstance().GetLocalizedString(
 292       IDS_APP_LIST_FOLDER_CLOSE_FOLDER_ACCESSIBILE_NAME);
 293   NotifyAccessibilityEvent(ui::AX_EVENT_ALERT, true);
 294
 295   GiveBackFocusToSearchBox();
 296   if (items_grid_view()->dragging())
 297     items_grid_view()->EndDrag(true);
 298   items_grid_view()->ClearAnySelectedView();
 299   container_view_->ShowApps(folder_item_);
 300 }
 301
 302 bool AppListFolderView::IsOEMFolder() const {
 303   return folder_item_->folder_type() == AppListFolderItem::FOLDER_TYPE_OEM;
 304 }
 305
 306 void AppListFolderView::SetRootLevelDragViewVisible(bool visible) {
 307   container_view_->apps_grid_view()->SetDragViewVisible(visible);
 308 }
 309
 310 void AppListFolderView::GetAccessibleState(ui::AXViewState* state) {
 311   state->role = ui::AX_ROLE_BUTTON;
 312   state->name = accessible_name_;
 313 }
 314
 315 void AppListFolderView::NavigateBack(AppListFolderItem* item,
 316                                      const ui::Event& event_flags) {
 317   CloseFolderPage();
 318 }
 319
 320 void AppListFolderView::GiveBackFocusToSearchBox() {
 321   app_list_main_view_->search_box_view()->search_box()->RequestFocus();
 322 }
 323
 324 void AppListFolderView::SetItemName(AppListFolderItem* item,
 325                                     const std::string& name) {
 326   model_->SetItemName(item, name);
 327 }
 328
 329 }  // namespace app_list