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| 1 // Copyright (c) 2012 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 "ash/app_list/app_list_model_view.h" | |
| 6 | |
| 7 #include "ash/app_list/app_list_item_view.h" | |
| 8 #include "ash/app_list/app_list_model.h" | |
| 9 #include "ash/app_list/pagination_model.h" | |
| 10 | |
| 11 namespace ash { | |
| 12 | |
| 13 AppListModelView::AppListModelView(views::ButtonListener* listener, | |
| 14 PaginationModel* pagination_model) | |
| 15 : model_(NULL), | |
| 16 listener_(listener), | |
| 17 pagination_model_(pagination_model), | |
| 18 fixed_layout_(false), | |
| 19 cols_(0), | |
| 20 rows_per_page_(0), | |
| 21 selected_item_index_(-1) { | |
| 22 set_focusable(true); | |
| 23 pagination_model_->AddObserver(this); | |
| 24 } | |
| 25 | |
| 26 AppListModelView::~AppListModelView() { | |
| 27 if (model_) | |
| 28 model_->RemoveObserver(this); | |
| 29 pagination_model_->RemoveObserver(this); | |
| 30 } | |
| 31 | |
| 32 void AppListModelView::SetLayout(int icon_size, int cols, int rows_per_page) { | |
| 33 fixed_layout_ = true; | |
| 34 | |
| 35 icon_size_.SetSize(icon_size, icon_size); | |
| 36 cols_ = cols; | |
| 37 rows_per_page_ = rows_per_page; | |
| 38 } | |
| 39 | |
| 40 void AppListModelView::CalculateLayout(const gfx::Size& content_size, | |
| 41 int num_of_tiles, | |
| 42 gfx::Size* icon_size, | |
| 43 int* rows, | |
| 44 int* cols) { | |
| 45 DCHECK(!content_size.IsEmpty() && num_of_tiles); | |
| 46 | |
| 47 // Icon sizes to try. | |
| 48 const int kIconSizes[] = { 128, 96, 64, 48, 32 }; | |
| 49 | |
| 50 double aspect = static_cast<double>(content_size.width()) / | |
| 51 content_size.height(); | |
| 52 | |
| 53 // Chooses the biggest icon size that could fit all tiles. | |
| 54 gfx::Size tile_size; | |
| 55 for (size_t i = 0; i < arraysize(kIconSizes); ++i) { | |
| 56 icon_size->SetSize(kIconSizes[i], kIconSizes[i]); | |
| 57 tile_size = AppListItemView::GetPreferredSizeForIconSize( | |
| 58 *icon_size); | |
| 59 | |
| 60 int max_cols = content_size.width() / tile_size.width(); | |
| 61 int max_rows = content_size.height() / tile_size.height(); | |
| 62 | |
| 63 // Skip if |tile_size| could not fit into |content_size|. | |
| 64 if (max_cols * max_rows < num_of_tiles) | |
| 65 continue; | |
| 66 | |
| 67 // Find a rows/cols pair that has a aspect ratio closest to |aspect|. | |
| 68 double min_aspect_diff = 1e5; | |
| 69 for (int c = std::max(max_cols / 2, 1); c <= max_cols; ++c) { | |
| 70 int r = std::min((num_of_tiles - 1) / c + 1, max_rows); | |
| 71 if (c * r < num_of_tiles) | |
| 72 continue; | |
| 73 | |
| 74 double aspect_diff = fabs(static_cast<double>(c) / r - aspect); | |
| 75 if (aspect_diff < min_aspect_diff) { | |
| 76 *cols = c; | |
| 77 *rows = r; | |
| 78 min_aspect_diff = aspect_diff; | |
| 79 } | |
| 80 } | |
| 81 | |
| 82 DCHECK((*rows) * (*cols) >= num_of_tiles); | |
| 83 return; | |
| 84 } | |
| 85 | |
| 86 // No icon size that could fit all tiles. | |
| 87 *cols = std::max(content_size.width() / tile_size.width(), 1); | |
| 88 *rows = (num_of_tiles - 1) / (*cols) + 1; | |
| 89 } | |
| 90 | |
| 91 void AppListModelView::SetModel(AppListModel* model) { | |
| 92 if (model_) | |
| 93 model_->RemoveObserver(this); | |
| 94 | |
| 95 model_ = model; | |
| 96 if (model_) | |
| 97 model_->AddObserver(this); | |
| 98 Update(); | |
| 99 } | |
| 100 | |
| 101 void AppListModelView::SetSelectedItem(AppListItemView* item) { | |
| 102 int index = GetIndexOf(item); | |
| 103 if (index >= 0) | |
| 104 SetSelectedItemByIndex(index); | |
| 105 } | |
| 106 | |
| 107 void AppListModelView::ClearSelectedItem(AppListItemView* item) { | |
| 108 int index = GetIndexOf(item); | |
| 109 if (index == selected_item_index_) | |
| 110 SetSelectedItemByIndex(-1); | |
| 111 } | |
| 112 | |
| 113 void AppListModelView::Update() { | |
| 114 selected_item_index_ = -1; | |
| 115 RemoveAllChildViews(true); | |
| 116 if (!model_ || model_->item_count() == 0) | |
| 117 return; | |
| 118 | |
| 119 for (int i = 0; i < model_->item_count(); ++i) | |
| 120 AddChildView(new AppListItemView(this, model_->GetItem(i), listener_)); | |
| 121 | |
| 122 Layout(); | |
| 123 SchedulePaint(); | |
| 124 } | |
| 125 | |
| 126 AppListItemView* AppListModelView::GetItemViewAtIndex(int index) { | |
| 127 return static_cast<AppListItemView*>(child_at(index)); | |
| 128 } | |
| 129 | |
| 130 void AppListModelView::SetSelectedItemByIndex(int index) { | |
| 131 if (selected_item_index_ == index) | |
| 132 return; | |
| 133 | |
| 134 if (selected_item_index_ >= 0) | |
| 135 GetItemViewAtIndex(selected_item_index_)->SetSelected(false); | |
| 136 | |
| 137 if (index < 0 || index >= child_count()) { | |
| 138 selected_item_index_ = -1; | |
| 139 } else { | |
| 140 selected_item_index_ = index; | |
| 141 GetItemViewAtIndex(selected_item_index_)->SetSelected(true); | |
| 142 | |
| 143 if (tiles_per_page()) | |
| 144 pagination_model_->SelectPage(selected_item_index_ / tiles_per_page()); | |
| 145 } | |
| 146 } | |
| 147 | |
| 148 gfx::Size AppListModelView::GetPreferredSize() { | |
| 149 if (!fixed_layout_) | |
| 150 return gfx::Size(); | |
| 151 | |
| 152 gfx::Size tile_size = AppListItemView::GetPreferredSizeForIconSize( | |
| 153 icon_size_); | |
| 154 return gfx::Size(tile_size.width() * cols_, | |
| 155 tile_size.height() * rows_per_page_); | |
| 156 } | |
| 157 | |
| 158 void AppListModelView::Layout() { | |
| 159 gfx::Rect rect(GetContentsBounds()); | |
| 160 if (rect.IsEmpty() || child_count() == 0) | |
| 161 return; | |
| 162 | |
| 163 gfx::Size tile_size; | |
| 164 if (fixed_layout_) { | |
| 165 tile_size = AppListItemView::GetPreferredSizeForIconSize(icon_size_); | |
| 166 } else { | |
| 167 int rows = 0; | |
| 168 CalculateLayout(rect.size(), child_count(), &icon_size_, &rows, &cols_); | |
| 169 | |
| 170 tile_size = AppListItemView::GetPreferredSizeForIconSize( | |
| 171 icon_size_); | |
| 172 rows_per_page_ = tile_size.height() ? | |
| 173 std::max(rect.height() / tile_size.height(), 1) : 1; | |
| 174 | |
| 175 tile_size.set_width(std::max(rect.width() / (cols_ + 1), | |
| 176 tile_size.width())); | |
| 177 tile_size.set_height(std::max(rect.height() / (rows_per_page_ + 1), | |
| 178 tile_size.height())); | |
| 179 } | |
| 180 | |
| 181 if (!tiles_per_page()) | |
| 182 return; | |
| 183 | |
| 184 pagination_model_->SetTotalPages((child_count() - 1) / tiles_per_page() + 1); | |
| 185 if (pagination_model_->selected_page() < 0) | |
| 186 pagination_model_->SelectPage(0); | |
| 187 | |
| 188 gfx::Rect grid_rect = rect.Center( | |
| 189 gfx::Size(tile_size.width() * cols_, | |
| 190 tile_size.height() * rows_per_page_)); | |
| 191 grid_rect = grid_rect.Intersect(rect); | |
| 192 | |
| 193 // Layouts items. | |
| 194 const int page = pagination_model_->selected_page(); | |
| 195 const int first_visible_index = page * tiles_per_page(); | |
| 196 const int last_visible_index = (page + 1) * tiles_per_page() - 1; | |
| 197 gfx::Rect current_tile(grid_rect.origin(), tile_size); | |
| 198 for (int i = 0; i < child_count(); ++i) { | |
| 199 views::View* view = child_at(i); | |
| 200 static_cast<AppListItemView*>(view)->SetIconSize(icon_size_); | |
| 201 | |
| 202 if (i < first_visible_index || i > last_visible_index) { | |
| 203 view->SetVisible(false); | |
| 204 continue; | |
| 205 } | |
| 206 | |
| 207 view->SetBoundsRect(current_tile); | |
| 208 view->SetVisible(rect.Contains(current_tile)); | |
| 209 | |
| 210 current_tile.Offset(tile_size.width(), 0); | |
| 211 if ((i + 1) % cols_ == 0) { | |
| 212 current_tile.set_x(grid_rect.x()); | |
| 213 current_tile.set_y(current_tile.y() + tile_size.height()); | |
| 214 } | |
| 215 } | |
| 216 } | |
| 217 | |
| 218 bool AppListModelView::OnKeyPressed(const views::KeyEvent& event) { | |
| 219 bool handled = false; | |
| 220 if (selected_item_index_ >= 0) | |
| 221 handled = GetItemViewAtIndex(selected_item_index_)->OnKeyPressed(event); | |
| 222 | |
| 223 if (!handled) { | |
| 224 switch (event.key_code()) { | |
| 225 case ui::VKEY_LEFT: | |
| 226 SetSelectedItemByIndex(std::max(selected_item_index_ - 1, 0)); | |
| 227 return true; | |
| 228 case ui::VKEY_RIGHT: | |
| 229 SetSelectedItemByIndex(std::min(selected_item_index_ + 1, | |
| 230 child_count() - 1)); | |
| 231 return true; | |
| 232 case ui::VKEY_UP: | |
| 233 SetSelectedItemByIndex(std::max(selected_item_index_ - cols_, | |
| 234 0)); | |
| 235 return true; | |
| 236 case ui::VKEY_DOWN: | |
| 237 if (selected_item_index_ < 0) { | |
| 238 SetSelectedItemByIndex(0); | |
| 239 } else { | |
| 240 SetSelectedItemByIndex(std::min(selected_item_index_ + cols_, | |
| 241 child_count() - 1)); | |
| 242 } | |
| 243 return true; | |
| 244 case ui::VKEY_PRIOR: { | |
| 245 SetSelectedItemByIndex( | |
| 246 std::max(selected_item_index_ - tiles_per_page(), | |
| 247 0)); | |
| 248 return true; | |
| 249 } | |
| 250 case ui::VKEY_NEXT: { | |
| 251 if (selected_item_index_ < 0) { | |
| 252 SetSelectedItemByIndex(0); | |
| 253 } else { | |
| 254 SetSelectedItemByIndex( | |
| 255 std::min(selected_item_index_ + tiles_per_page(), | |
| 256 child_count() - 1)); | |
| 257 } | |
| 258 } | |
| 259 default: | |
| 260 break; | |
| 261 } | |
| 262 } | |
| 263 | |
| 264 return handled; | |
| 265 } | |
| 266 | |
| 267 bool AppListModelView::OnKeyReleased(const views::KeyEvent& event) { | |
| 268 bool handled = false; | |
| 269 if (selected_item_index_ >= 0) | |
| 270 handled = GetItemViewAtIndex(selected_item_index_)->OnKeyReleased(event); | |
| 271 | |
| 272 return handled; | |
| 273 } | |
| 274 | |
| 275 void AppListModelView::OnPaintFocusBorder(gfx::Canvas* canvas) { | |
| 276 // Override to not paint focus frame. | |
| 277 } | |
| 278 | |
| 279 void AppListModelView::ListItemsAdded(int start, int count) { | |
| 280 for (int i = start; i < start + count; ++i) { | |
| 281 AddChildViewAt(new AppListItemView(this, model_->GetItem(i), listener_), | |
| 282 i); | |
| 283 } | |
| 284 Layout(); | |
| 285 SchedulePaint(); | |
| 286 } | |
| 287 | |
| 288 void AppListModelView::ListItemsRemoved(int start, int count) { | |
| 289 for (int i = 0; i < count; ++i) | |
| 290 delete child_at(start); | |
| 291 | |
| 292 Layout(); | |
| 293 SchedulePaint(); | |
| 294 } | |
| 295 | |
| 296 void AppListModelView::ListItemsChanged(int start, int count) { | |
| 297 NOTREACHED(); | |
| 298 } | |
| 299 | |
| 300 void AppListModelView::TotalPagesChanged() { | |
| 301 } | |
| 302 | |
| 303 void AppListModelView::SelectedPageChanged(int old_selected, int new_selected) { | |
| 304 Layout(); | |
| 305 } | |
| 306 | |
| 307 } // namespace ash | |
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Chromium Code Reviews
Issue 10388032:
Move app list from ash to ui. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src/