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_header_view.h"
  19 #include "ui/compositor/scoped_layer_animation_settings.h"
  20 #include "ui/events/event.h"
  21 #include "ui/views/view_model.h"
  22 #include "ui/views/view_model_utils.h"
  23
  24 namespace app_list {
  25
  26 namespace {
  27
  28 // Indexes of interesting views in ViewModel of AppListFolderView.
  29 const int kIndexFolderHeader = 0;
  30 const int kIndexChildItems = 1;
  31
  32 }  // namespace
  33
  34 AppListFolderView::AppListFolderView(AppsContainerView* container_view,
  35                                      AppListModel* model,
  36                                      AppListMainView* app_list_main_view,
  37                                      content::WebContents* start_page_contents)
  38     : container_view_(container_view),
  39       folder_header_view_(new FolderHeaderView(this)),
  40       view_model_(new views::ViewModel),
  41       model_(model),
  42       folder_item_(NULL),
  43       pagination_model_(new PaginationModel) {
  44   AddChildView(folder_header_view_);
  45   view_model_->Add(folder_header_view_, kIndexFolderHeader);
  46
  47   items_grid_view_ = new AppsGridView(
  48       app_list_main_view, pagination_model_.get(), NULL);
  49   items_grid_view_->set_is_root_level(false);
  50   items_grid_view_->SetLayout(kPreferredIconDimension,
  51                               kPreferredCols,
  52                               kPreferredRows);
  53   items_grid_view_->SetModel(model);
  54   AddChildView(items_grid_view_);
  55   view_model_->Add(items_grid_view_, kIndexChildItems);
  56
  57 #if defined(USE_AURA)
  58   SetPaintToLayer(true);
  59   SetFillsBoundsOpaquely(false);
  60 #endif
  61
  62   model_->item_list()->AddObserver(this);
  63 }
  64
  65 AppListFolderView::~AppListFolderView() {
  66   model_->item_list()->RemoveObserver(this);
  67   // Make sure |items_grid_view_| is deleted before |pagination_model_|.
  68   RemoveAllChildViews(true);
  69 }
  70
  71 void AppListFolderView::SetAppListFolderItem(AppListFolderItem* folder) {
  72   folder_item_ = folder;
  73   items_grid_view_->SetItemList(folder_item_->item_list());
  74   folder_header_view_->SetFolderItem(folder_item_);
  75 }
  76
  77 void AppListFolderView::ScheduleShowHideAnimation(bool show) {
  78   // Stop any previous animation.
  79   layer()->GetAnimator()->StopAnimating();
  80
  81   // Hide the top items temporarily if showing the view for opening the folder.
  82   if (show)
  83     items_grid_view_->SetTopItemViewsVisible(false);
  84
  85   // Set initial state.
  86   SetVisible(true);
  87   layer()->SetOpacity(show ? 0.0f : 1.0f);
  88
  89   ui::ScopedLayerAnimationSettings animation(layer()->GetAnimator());
  90   animation.SetTweenType(gfx::Tween::EASE_IN_2);
  91   animation.AddObserver(this);
  92   animation.SetTransitionDuration(base::TimeDelta::FromMilliseconds(
  93       show ? kFolderTransitionInDurationMs : kFolderTransitionOutDurationMs));
  94
  95   layer()->SetOpacity(show ? 1.0f : 0.0f);
  96 }
  97
  98 gfx::Size AppListFolderView::GetPreferredSize() {
  99   const gfx::Size header_size = folder_header_view_->GetPreferredSize();
 100   const gfx::Size grid_size = items_grid_view_->GetPreferredSize();
 101   int width = std::max(header_size.width(), grid_size.width());
 102   int height = header_size.height() + grid_size.height();
 103   return gfx::Size(width, height);
 104 }
 105
 106 void AppListFolderView::Layout() {
 107   CalculateIdealBounds();
 108   views::ViewModelUtils::SetViewBoundsToIdealBounds(*view_model_);
 109 }
 110
 111 bool AppListFolderView::OnKeyPressed(const ui::KeyEvent& event) {
 112   return items_grid_view_->OnKeyPressed(event);
 113 }
 114
 115 void AppListFolderView::OnListItemRemoved(size_t index, AppListItem* item) {
 116   // If the folder item associated with this view is removed from the model,
 117   // (e.g. the last item in the folder was deleted), reset the view and signal
 118   // the container view to show the app list instead.
 119   if (item == folder_item_) {
 120     items_grid_view_->SetItemList(NULL);
 121     folder_header_view_->SetFolderItem(NULL);
 122     folder_item_ = NULL;
 123     // Pass NULL to ShowApps() to avoid triggering animation from the deleted
 124     // folder.
 125     container_view_->ShowApps(NULL);
 126   }
 127 }
 128
 129 void AppListFolderView::OnImplicitAnimationsCompleted() {
 130   // Show the top items when the opening folder animation is done.
 131   if (layer()->opacity() == 1.0f)
 132     items_grid_view_->SetTopItemViewsVisible(true);
 133
 134   if (layer()->opacity() == 0.0f)
 135     SetVisible(false);
 136 }
 137
 138 void AppListFolderView::CalculateIdealBounds() {
 139   gfx::Rect rect(GetContentsBounds());
 140   if (rect.IsEmpty())
 141     return;
 142
 143   gfx::Rect header_frame(rect);
 144   gfx::Size size = folder_header_view_->GetPreferredSize();
 145   header_frame.set_height(size.height());
 146   view_model_->set_ideal_bounds(kIndexFolderHeader, header_frame);
 147
 148   gfx::Rect grid_frame(rect);
 149   grid_frame.set_y(header_frame.height());
 150   view_model_->set_ideal_bounds(kIndexChildItems, grid_frame);
 151 }
 152
 153 gfx::Rect AppListFolderView::GetItemIconBoundsAt(int index) {
 154   AppListItemView* item_view = items_grid_view_->GetItemViewAt(index);
 155   // Icon bounds relative to AppListItemView.
 156   const gfx::Rect icon_bounds = item_view->GetIconBounds();
 157   gfx::Rect to_apps_grid_view = item_view->ConvertRectToParent(icon_bounds);
 158   gfx::Rect to_folder =
 159       items_grid_view_->ConvertRectToParent(to_apps_grid_view);
 160
 161   // Get the icon image's bound.
 162   to_folder.ClampToCenteredSize(
 163       gfx::Size(kPreferredIconDimension, kPreferredIconDimension));
 164
 165   return to_folder;
 166 }
 167
 168 void AppListFolderView::NavigateBack(AppListFolderItem* item,
 169                                      const ui::Event& event_flags) {
 170   container_view_->ShowApps(item);
 171 }
 172
 173 }  // namespace app_list