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