Draggable peeking/fullscreen launcher with transparent background.

ui/app_list/views/search_box_view.h

 // Copyright (c) 2012 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.
 
 #ifndef UI_APP_LIST_VIEWS_SEARCH_BOX_VIEW_H_
 #define UI_APP_LIST_VIEWS_SEARCH_BOX_VIEW_H_
 
 #include <string>
 
 #include "base/macros.h"
@@ skipping 13 matching lines @@
 // Possible locations for partial keyboard focus (but note that the search
 // box always handles typing).
 enum SearchBoxFocus {
   FOCUS_BACK_BUTTON,    // Back button, only responds to ENTER
   FOCUS_SEARCH_BOX,     // Nothing else has partial focus
   FOCUS_MIC_BUTTON,     // Mic button, only responds to ENTER
   FOCUS_CONTENTS_VIEW,  // Something outside the SearchBox is selected
 };
 
 class AppListModel;
+class AppListView;
 class AppListViewDelegate;
 class SearchBoxModel;
 class SearchBoxViewDelegate;
 class SearchBoxImageButton;
 
 // SearchBoxView consists of an icon and a Textfield. SearchBoxModel is its data
 // model that controls what icon to display, what placeholder text to use for
 // Textfield. The text and selection model part could be set to change the
 // contents and selection model of the Textfield.
 class APP_LIST_EXPORT SearchBoxView : public views::View,
                                       public views::TextfieldController,
                                       public views::ButtonListener,
                                       public SearchBoxModelObserver,
                                       public SpeechUIModelObserver {
  public:
   SearchBoxView(SearchBoxViewDelegate* delegate,
-                AppListViewDelegate* view_delegate);
+                AppListViewDelegate* view_delegate,
+                AppListView* app_list_view = nullptr);
   ~SearchBoxView() override;
 
   void ModelChanged();
   bool HasSearch() const;
   void ClearSearch();
 
   // Sets the shadow border of the search box.
   void SetShadow(const gfx::ShadowValue& shadow);
 
   // Returns the bounds to use for the view (including the shadow) given the
@@ skipping 50 matching lines @@
 
   SearchBoxViewDelegate* delegate_;  // Not owned.
   AppListViewDelegate* view_delegate_;  // Not owned.
   AppListModel* model_;  // Owned by the profile-keyed service.
 
   views::View* content_container_;     // Owned by views hierarchy.
   SearchBoxImageButton* back_button_;    // Owned by views hierarchy.
   SearchBoxImageButton* speech_button_;  // Owned by views hierarchy.
   views::Textfield* search_box_;  // Owned by views hierarchy.
   views::View* contents_view_;  // Owned by views hierarchy.
+  app_list::AppListView* app_list_view_;  // Owned by views hierarchy.
 
   SearchBoxFocus focused_view_;  // Which element has TAB'd focus.
 
   DISALLOW_COPY_AND_ASSIGN(SearchBoxView);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_VIEWS_SEARCH_BOX_VIEW_H_