src/ui/app_list/views/start_page_view.cc

   1 // Copyright 2014 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/start_page_view.h"
   6
   7 #include "base/strings/utf_string_conversions.h"
   8 #include "ui/app_list/app_list_constants.h"
   9 #include "ui/app_list/app_list_item.h"
  10 #include "ui/app_list/app_list_model.h"
  11 #include "ui/app_list/app_list_view_delegate.h"
  12 #include "ui/app_list/search_result.h"
  13 #include "ui/app_list/views/app_list_main_view.h"
  14 #include "ui/app_list/views/search_box_view.h"
  15 #include "ui/app_list/views/search_result_list_view.h"
  16 #include "ui/app_list/views/tile_item_view.h"
  17 #include "ui/gfx/canvas.h"
  18 #include "ui/views/background.h"
  19 #include "ui/views/controls/image_view.h"
  20 #include "ui/views/controls/label.h"
  21 #include "ui/views/controls/textfield/textfield.h"
  22 #include "ui/views/layout/box_layout.h"
  23 #include "ui/views/widget/widget.h"
  24
  25 namespace app_list {
  26
  27 namespace {
  28
  29 // Layout constants.
  30 const int kTopMargin = 84;
  31 const int kInstantContainerSpacing = 11;
  32 const int kSearchBoxAndTilesSpacing = 40;
  33
  34 // WebView constants.
  35 const int kWebViewWidth = 500;
  36 const int kWebViewHeight = 105;
  37
  38 // DummySearchBoxView constants.
  39 const int kDummySearchBoxWidth = 480;
  40
  41 // Tile container constants.
  42 const size_t kNumStartPageTiles = 5;
  43 const int kTileSpacing = 10;
  44
  45 // A placeholder search box which is sized to fit within the start page view.
  46 class DummySearchBoxView : public SearchBoxView {
  47  public:
  48   DummySearchBoxView(SearchBoxViewDelegate* delegate,
  49                      AppListViewDelegate* view_delegate)
  50       : SearchBoxView(delegate, view_delegate) {
  51   }
  52
  53   virtual ~DummySearchBoxView() {}
  54
  55   // Overridden from views::View:
  56   virtual gfx::Size GetPreferredSize() const OVERRIDE {
  57     gfx::Size size(SearchBoxView::GetPreferredSize());
  58     size.set_width(kDummySearchBoxWidth);
  59     return size;
  60   }
  61
  62  private:
  63   DISALLOW_COPY_AND_ASSIGN(DummySearchBoxView);
  64 };
  65
  66 }  // namespace
  67
  68 StartPageView::StartPageView(AppListMainView* app_list_main_view,
  69                              AppListViewDelegate* view_delegate)
  70     : app_list_main_view_(app_list_main_view),
  71       search_results_model_(NULL),
  72       view_delegate_(view_delegate),
  73       search_box_view_(new DummySearchBoxView(this, view_delegate_)),
  74       results_view_(
  75           new SearchResultListView(app_list_main_view, view_delegate)),
  76       instant_container_(new views::View),
  77       tiles_container_(new views::View),
  78       show_state_(SHOW_START_PAGE),
  79       update_factory_(this) {
  80   // The view containing the start page WebContents and DummySearchBoxView.
  81   InitInstantContainer();
  82   AddChildView(instant_container_);
  83
  84   // The view containing the search results.
  85   AddChildView(results_view_);
  86
  87   // The view containing the start page tiles.
  88   InitTilesContainer();
  89   AddChildView(tiles_container_);
  90
  91   SetModel(view_delegate_->GetModel());
  92 }
  93
  94 StartPageView::~StartPageView() {
  95   if (search_results_model_)
  96     search_results_model_->RemoveObserver(this);
  97 }
  98
  99 void StartPageView::InitInstantContainer() {
 100   views::BoxLayout* instant_layout_manager = new views::BoxLayout(
 101       views::BoxLayout::kVertical, 0, 0, kInstantContainerSpacing);
 102   instant_layout_manager->set_inside_border_insets(
 103       gfx::Insets(kTopMargin, 0, kSearchBoxAndTilesSpacing, 0));
 104   instant_layout_manager->set_main_axis_alignment(
 105       views::BoxLayout::MAIN_AXIS_ALIGNMENT_END);
 106   instant_layout_manager->set_cross_axis_alignment(
 107       views::BoxLayout::CROSS_AXIS_ALIGNMENT_CENTER);
 108   instant_container_->SetLayoutManager(instant_layout_manager);
 109
 110   views::View* web_view = view_delegate_->CreateStartPageWebView(
 111       gfx::Size(kWebViewWidth, kWebViewHeight));
 112   if (web_view)
 113     instant_container_->AddChildView(web_view);
 114
 115   // TODO(calamity): This container is needed to horizontally center the search
 116   // box view. Remove this container once BoxLayout supports CrossAxisAlignment.
 117   views::View* search_box_container = new views::View();
 118   views::BoxLayout* layout_manager =
 119       new views::BoxLayout(views::BoxLayout::kHorizontal, 0, 0, 0);
 120   layout_manager->set_main_axis_alignment(
 121       views::BoxLayout::MAIN_AXIS_ALIGNMENT_CENTER);
 122   search_box_container->SetLayoutManager(layout_manager);
 123   search_box_container->AddChildView(search_box_view_);
 124
 125   instant_container_->AddChildView(search_box_container);
 126 }
 127
 128 void StartPageView::InitTilesContainer() {
 129   views::BoxLayout* tiles_layout_manager =
 130       new views::BoxLayout(views::BoxLayout::kHorizontal, 0, 0, kTileSpacing);
 131   tiles_layout_manager->set_main_axis_alignment(
 132       views::BoxLayout::MAIN_AXIS_ALIGNMENT_CENTER);
 133   tiles_container_->SetLayoutManager(tiles_layout_manager);
 134   for (size_t i = 0; i < kNumStartPageTiles; ++i) {
 135     TileItemView* tile_item = new TileItemView();
 136     tiles_container_->AddChildView(tile_item);
 137     tile_views_.push_back(tile_item);
 138   }
 139 }
 140
 141 void StartPageView::SetModel(AppListModel* model) {
 142   DCHECK(model);
 143   if (search_results_model_)
 144     search_results_model_->RemoveObserver(this);
 145   search_results_model_ = model->results();
 146   search_results_model_->AddObserver(this);
 147   results_view_->SetResults(search_results_model_);
 148   Reset();
 149 }
 150
 151 void StartPageView::Reset() {
 152   SetShowState(SHOW_START_PAGE);
 153   Update();
 154 }
 155
 156 void StartPageView::ShowSearchResults() {
 157   SetShowState(SHOW_SEARCH_RESULTS);
 158   Update();
 159 }
 160
 161 void StartPageView::SetShowState(ShowState show_state) {
 162   instant_container_->SetVisible(show_state == SHOW_START_PAGE);
 163   results_view_->SetVisible(show_state == SHOW_SEARCH_RESULTS);
 164
 165   // This can be called when the app list is closing (widget is invisible). In
 166   // that case, do not steal focus from other elements.
 167   if (show_state == SHOW_START_PAGE && GetWidget() && GetWidget()->IsVisible())
 168     search_box_view_->search_box()->RequestFocus();
 169
 170   if (show_state_ == show_state)
 171     return;
 172
 173   show_state_ = show_state;
 174
 175   if (show_state_ == SHOW_START_PAGE)
 176     search_box_view_->ClearSearch();
 177
 178   results_view_->UpdateAutoLaunchState();
 179   if (show_state == SHOW_SEARCH_RESULTS)
 180     results_view_->SetSelectedIndex(0);
 181 }
 182
 183 bool StartPageView::IsShowingSearchResults() const {
 184   return show_state_ == SHOW_SEARCH_RESULTS;
 185 }
 186
 187 void StartPageView::UpdateForTesting() {
 188   Update();
 189 }
 190
 191 bool StartPageView::OnKeyPressed(const ui::KeyEvent& event) {
 192   if (show_state_ == SHOW_SEARCH_RESULTS)
 193     return results_view_->OnKeyPressed(event);
 194
 195   return false;
 196 }
 197
 198 void StartPageView::Layout() {
 199   // Instant and search results take up the height of the instant container.
 200   gfx::Rect bounds(GetContentsBounds());
 201   bounds.set_height(instant_container_->GetHeightForWidth(bounds.width()));
 202   instant_container_->SetBoundsRect(bounds);
 203   results_view_->SetBoundsRect(bounds);
 204
 205   // Tiles begin where the instant container ends.
 206   bounds.set_y(bounds.bottom());
 207   bounds.set_height(tiles_container_->GetHeightForWidth(bounds.width()));
 208   tiles_container_->SetBoundsRect(bounds);
 209 }
 210
 211 void StartPageView::Update() {
 212   std::vector<SearchResult*> display_results =
 213       AppListModel::FilterSearchResultsByDisplayType(search_results_model_,
 214                                                      SearchResult::DISPLAY_TILE,
 215                                                      kNumStartPageTiles);
 216   for (size_t i = 0; i < kNumStartPageTiles; ++i) {
 217     SearchResult* item = NULL;
 218     if (i < display_results.size())
 219       item = display_results[i];
 220     tile_views_[i]->SetSearchResult(item);
 221   }
 222   tiles_container_->Layout();
 223   Layout();
 224   update_factory_.InvalidateWeakPtrs();
 225 }
 226
 227 void StartPageView::ScheduleUpdate() {
 228   // When search results are added one by one, each addition generates an update
 229   // request. Consolidates those update requests into one Update call.
 230   if (!update_factory_.HasWeakPtrs()) {
 231     base::MessageLoop::current()->PostTask(
 232         FROM_HERE,
 233         base::Bind(&StartPageView::Update, update_factory_.GetWeakPtr()));
 234   }
 235 }
 236
 237 void StartPageView::QueryChanged(SearchBoxView* sender) {
 238   // Forward the search terms on to the real search box and clear the dummy
 239   // search box.
 240   app_list_main_view_->OnStartPageSearchTextfieldChanged(
 241       sender->search_box()->text());
 242   sender->search_box()->SetText(base::string16());
 243 }
 244
 245 void StartPageView::ListItemsAdded(size_t start, size_t count) {
 246   ScheduleUpdate();
 247 }
 248
 249 void StartPageView::ListItemsRemoved(size_t start, size_t count) {
 250   ScheduleUpdate();
 251 }
 252
 253 void StartPageView::ListItemMoved(size_t index, size_t target_index) {
 254   ScheduleUpdate();
 255 }
 256
 257 void StartPageView::ListItemsChanged(size_t start, size_t count) {
 258   ScheduleUpdate();
 259 }
 260
 261 }  // namespace app_list