Draggable peeking/fullscreen launcher with transparent background.

ui/app_list/views/app_list_main_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_main_view.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 44 matching lines @@
                 new views::BoxLayout(views::BoxLayout::kVertical, 0, 0, 0)));
   model_->AddObserver(this);
 }
 
 AppListMainView::~AppListMainView() {
   model_->RemoveObserver(this);
 }
 
 void AppListMainView::Init(gfx::NativeView parent,
                            int initial_apps_page,
-                           SearchBoxView* search_box_view) {
+                           SearchBoxView* search_box_view,
+                           AppListView* app_list_view) {
   search_box_view_ = search_box_view;
+  app_list_view_ = app_list_view;
   AddContentsViews();
 
   // Switch the apps grid view to the specified page.
   app_list::PaginationModel* pagination_model = GetAppsPaginationModel();
   if (pagination_model->is_valid_page(initial_apps_page))
     pagination_model->SelectPage(initial_apps_page, false);
 
   OnSearchEngineIsGoogleChanged(model_->search_engine_is_google());
 }
 
 void AppListMainView::AddContentsViews() {
   DCHECK(search_box_view_);
-
-  contents_view_ = new ContentsView(this);
+  contents_view_ = new ContentsView(this, app_list_view_);
   contents_view_->Init(model_);
   AddChildView(contents_view_);
 
   search_box_view_->set_contents_view(contents_view_);
 
   contents_view_->SetPaintToLayer();
   contents_view_->layer()->SetFillsBoundsOpaquely(false);
   contents_view_->layer()->SetMasksToBounds(true);
 
   // Clear the old query and start search.
@@ skipping 122 matching lines @@
     contents_view_->search_results_page_view()->SetSelection(select);
 }
 
 void AppListMainView::OnResultInstalled(SearchResult* result) {
   // Clears the search to show the apps grid. The last installed app
   // should be highlighted and made visible already.
   search_box_view_->ClearSearch();
 }
 
 }  // namespace app_list