Implement app list folder management page UI.

ui/app_list/views/app_list_folder_view.cc

+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ui/app_list/views/app_list_folder_view.h"
+
+#include "ui/app_list/app_list_constants.h"
+#include "ui/app_list/app_list_folder_item.h"
+#include "ui/app_list/app_list_model.h"
+#include "ui/app_list/pagination_model.h"
+#include "ui/app_list/views/app_list_main_view.h"
+#include "ui/app_list/views/apps_container_view.h"
+#include "ui/app_list/views/apps_grid_view.h"
+#include "ui/app_list/views/contents_view.h"
+#include "ui/app_list/views/folder_header_view.h"
+#include "ui/views/view_model.h"
+#include "ui/views/view_model_utils.h"
+
+namespace app_list {
+
+namespace {
+
+// Indexes of interesting views in ViewModel of AppListFolderView.
+const int kIndexFolderHeader = 0;
+const int kIndexChildItems = 1;
+
+}  // namespace
+
+AppListFolderView::AppListFolderView(AppsContainerView* container_view,
+                                     AppListModel* model,
+                                     AppListMainView* app_list_main_view,
+                                     content::WebContents* start_page_contents)
+    : container_view_(container_view),
+      folder_header_view_(new FolderHeaderView(this)),
+      view_model_(new views::ViewModel),
+      folder_item_(NULL),
+      pagination_model_(new PaginationModel) {
+  AddChildView(folder_header_view_);
+  view_model_->Add(folder_header_view_, kIndexFolderHeader);
+
+  items_grid_view_ = new AppsGridView(
+      app_list_main_view, pagination_model_.get(), NULL);
+  items_grid_view_->SetLayout(kPreferredIconDimension,
+                              kPreferredCols,
+                              kPreferredRows);
+  items_grid_view_->SetModel(model);
+  AddChildView(items_grid_view_);
+  view_model_->Add(items_grid_view_, kIndexChildItems);
+}
+
+AppListFolderView::~AppListFolderView() {

[xiyuan, 2013/10/23 00:43:25]

Add "RemoveAllChildViews(true);" here to explicitly delete |items_grid_view_|.
This should fix the use-after-free

[jennyz, 2013/10/23 05:25:52]

Thanks, fixed in a new patch since it is reverted and running on bots to try.

+}
+
+void AppListFolderView::SetAppListFolderItem(AppListFolderItem* folder) {
+  folder_item_ = folder;
+  items_grid_view_->SetApps(folder_item_->apps());
+  folder_header_view_->SetFolderItem(folder_item_);
+}
+
+gfx::Size AppListFolderView::GetPreferredSize() {
+  const gfx::Size header_size = folder_header_view_->GetPreferredSize();
+  const gfx::Size grid_size = items_grid_view_->GetPreferredSize();
+  int width = std::max(header_size.width(), grid_size.width());
+  int height = header_size.height() + grid_size.height();
+  return gfx::Size(width, height);
+}
+
+void AppListFolderView::Layout() {
+  CalculateIdealBounds();
+  views::ViewModelUtils::SetViewBoundsToIdealBounds(*view_model_);
+}
+
+void AppListFolderView::CalculateIdealBounds() {
+  gfx::Rect rect(GetContentsBounds());
+  if (rect.IsEmpty())
+    return;
+
+  gfx::Rect header_frame(rect);
+  gfx::Size size = folder_header_view_->GetPreferredSize();
+  header_frame.set_height(size.height());
+  view_model_->set_ideal_bounds(kIndexFolderHeader, header_frame);
+
+  gfx::Rect grid_frame(rect);
+  grid_frame.set_y(header_frame.height());
+  view_model_->set_ideal_bounds(kIndexChildItems, grid_frame);
+}
+
+void AppListFolderView::NavigateBack(AppListFolderItem* item,
+                                     const ui::Event& event_flags) {
+  container_view_->ShowApps();
+}
+
+}  // namespace app_list
+