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