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/compositor/scoped_layer_animation_settings.h"
  21 #include "ui/events/event.h"
  22 #include "ui/gfx/rect_conversions.h"
  23 #include "ui/views/view_model.h"
  24 #include "ui/views/view_model_utils.h"
  25
  26 namespace app_list {
  27
  28 namespace {
  29
  30 // Indexes of interesting views in ViewModel of AppListFolderView.
  31 const int kIndexFolderHeader = 0;
  32 const int kIndexChildItems = 1;
  33
  34 // Threshold for the distance from the center of the item to the circle of the
  35 // folder container ink bubble, beyond which, the item is considered dragged
  36 // out of the folder boundary.
  37 const int kOutOfFolderContainerBubbleDelta = 30;
  38
  39 }  // namespace
  40
  41 AppListFolderView::AppListFolderView(AppsContainerView* container_view,
  42                                      AppListModel* model,
  43                                      AppListMainView* app_list_main_view,
  44                                      content::WebContents* start_page_contents)
  45     : container_view_(container_view),
  46       folder_header_view_(new FolderHeaderView(this)),
  47       view_model_(new views::ViewModel),
  48       model_(model),
  49       folder_item_(NULL),
  50       pagination_model_(new PaginationModel),
  51       hide_for_reparent_(false) {
  52   AddChildView(folder_header_view_);
  53   view_model_->Add(folder_header_view_, kIndexFolderHeader);
  54
  55   items_grid_view_ = new AppsGridView(
  56       app_list_main_view, pagination_model_.get(), NULL);
  57   items_grid_view_->set_is_root_level(false);
  58   items_grid_view_->SetLayout(
  59       kPreferredIconDimension,
  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 #if defined(USE_AURA)
  67   SetPaintToLayer(true);
  68   SetFillsBoundsOpaquely(false);
  69 #endif
  70
  71   model_->item_list()->AddObserver(this);
  72 }
  73
  74 AppListFolderView::~AppListFolderView() {
  75   model_->item_list()->RemoveObserver(this);
  76   // Make sure |items_grid_view_| is deleted before |pagination_model_|.
  77   RemoveAllChildViews(true);
  78 }
  79
  80 void AppListFolderView::SetAppListFolderItem(AppListFolderItem* folder) {
  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() {
 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::OnListItemRemoved(size_t index, 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 (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   // Converts the original_drag_view's bounds to the coordinate system of
 183   // root level grid view.
 184   gfx::RectF rect_f(original_drag_view->bounds());
 185   views::View::ConvertRectToTarget(items_grid_view_,
 186                                    container_view_->apps_grid_view(),
 187                                    &rect_f);
 188   gfx::Rect rect_in_root_grid_view = gfx::ToEnclosingRect(rect_f);
 189
 190   container_view_->apps_grid_view()->
 191       InitiateDragFromReparentItemInRootLevelGridView(
 192           original_drag_view, rect_in_root_grid_view, drag_point_in_root_grid);
 193 }
 194
 195 gfx::Rect AppListFolderView::GetItemIconBoundsAt(int index) {
 196   AppListItemView* item_view = items_grid_view_->GetItemViewAt(index);
 197   // Icon bounds relative to AppListItemView.
 198   const gfx::Rect icon_bounds = item_view->GetIconBounds();
 199   gfx::Rect to_apps_grid_view = item_view->ConvertRectToParent(icon_bounds);
 200   gfx::Rect to_folder =
 201       items_grid_view_->ConvertRectToParent(to_apps_grid_view);
 202
 203   // Get the icon image's bound.
 204   to_folder.ClampToCenteredSize(
 205       gfx::Size(kPreferredIconDimension, kPreferredIconDimension));
 206
 207   return to_folder;
 208 }
 209
 210 void AppListFolderView::UpdateFolderViewBackground(bool show_bubble) {
 211   if (hide_for_reparent_)
 212     return;
 213
 214   // Before showing the folder container inking bubble, hide the folder name.
 215   if (show_bubble)
 216     UpdateFolderNameVisibility(false);
 217
 218   container_view_->folder_background_view()->UpdateFolderContainerBubble(
 219       show_bubble ? FolderBackgroundView::SHOW_BUBBLE :
 220                     FolderBackgroundView::HIDE_BUBBLE);
 221 }
 222
 223 void AppListFolderView::UpdateFolderNameVisibility(bool visible) {
 224   folder_header_view_->UpdateFolderNameVisibility(visible);
 225 }
 226
 227 bool AppListFolderView::IsPointOutsideOfFolderBoundray(
 228     const gfx::Point& point) {
 229   if (!GetLocalBounds().Contains(point))
 230     return true;
 231
 232   gfx::Point center = GetLocalBounds().CenterPoint();
 233   float delta = (point - center).Length();
 234   return delta > container_view_->folder_background_view()->
 235       GetFolderContainerBubbleRadius() + kOutOfFolderContainerBubbleDelta;
 236 }
 237
 238 // When user drags a folder item out of the folder boundary ink bubble, the
 239 // folder view UI will be hidden, and switch back to top level AppsGridView.
 240 // The dragged item will seamlessly move on the top level AppsGridView.
 241 // In order to achieve the above, we keep the folder view and its child grid
 242 // view visible with opacity 0, so that the drag_view_ on the hidden grid view
 243 // will keep receiving mouse event. At the same time, we initiated a new
 244 // drag_view_ in the top level grid view, and keep it moving with the hidden
 245 // grid view's drag_view_, so that the dragged item can be engaged in drag and
 246 // drop flow in the top level grid view. During the reparenting process, the
 247 // drag_view_ in hidden grid view will dispatch the drag and drop event to
 248 // the top level grid view, until the drag ends.
 249 void AppListFolderView::ReparentItem(
 250     AppListItemView* original_drag_view,
 251     const gfx::Point& drag_point_in_folder_grid) {
 252   // Convert the drag point relative to the root level AppsGridView.
 253   gfx::Point to_root_level_grid = drag_point_in_folder_grid;
 254   ConvertPointToTarget(items_grid_view_,
 255                        container_view_->apps_grid_view(),
 256                        &to_root_level_grid);
 257   StartSetupDragInRootLevelAppsGridView(original_drag_view, to_root_level_grid);
 258   container_view_->ReparentFolderItemTransit(folder_item_);
 259 }
 260
 261 void AppListFolderView::DispatchDragEventForReparent(
 262     AppsGridView::Pointer pointer,
 263     const ui::LocatedEvent& event) {
 264   container_view_->apps_grid_view()->UpdateDragFromReparentItem(pointer, event);
 265 }
 266
 267 void AppListFolderView::DispatchEndDragEventForReparent(
 268     bool events_forwarded_to_drag_drop_host) {
 269   container_view_->apps_grid_view()->
 270       EndDragFromReparentItemInRootLevel(events_forwarded_to_drag_drop_host);
 271 }
 272
 273
 274 void AppListFolderView::HideViewImmediately() {
 275   SetVisible(false);
 276   hide_for_reparent_ = false;
 277 }
 278
 279 void AppListFolderView::NavigateBack(AppListFolderItem* item,
 280                                      const ui::Event& event_flags) {
 281   container_view_->ShowApps(item);
 282 }
 283
 284 }  // namespace app_list