Drag and drop between app list and launcher - First patch

ui/app_list/views/app_list_main_view.h

 // 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.
 
 #ifndef UI_APP_LIST_VIEWS_APP_LIST_MAIN_VIEW_H_
 #define UI_APP_LIST_VIEWS_APP_LIST_MAIN_VIEW_H_
 
 #include "base/memory/scoped_vector.h"
 #include "base/timer.h"
 #include "ui/app_list/apps_grid_view_delegate.h"
 #include "ui/app_list/search_box_view_delegate.h"
 #include "ui/app_list/search_result_list_view_delegate.h"
 #include "ui/views/view.h"
 
 namespace views {
 class Widget;
 }
 
 namespace app_list {
 
+class ApplicationDragAndDropHost;
 class AppListModel;
 class AppListItemModel;
 class AppListViewDelegate;
 class ContentsView;
 class PaginationModel;
 class SearchBoxView;
 
 // AppListMainView contains the normal view of the app list, which is shown
 // when the user is signed in.
 class AppListMainView : public views::View,
                         public AppsGridViewDelegate,
                         public SearchBoxViewDelegate,
                         public SearchResultListViewDelegate {
  public:
   // Takes ownership of |delegate|.
   explicit AppListMainView(AppListViewDelegate* delegate,
                            AppListModel* model,
                            PaginationModel* pagination_model,
                            views::View* anchor);
   virtual ~AppListMainView();
 
   void ShowAppListWhenReady();
 
   void Close();
 
   void Prerender();
 
   SearchBoxView* search_box_view() { return search_box_view_; }
 
+  // If |drag_and_drop_host| is not NULL it will be called upon drag and drop
+  // operations outside the application list.
+  void SetDragAndDropHostOfCurrentAppList(
+      ApplicationDragAndDropHost* drag_and_drop_host);
+
  private:
   class IconLoader;
 
   // Loads icon image for the apps in the selected page of |pagination_model|.
   // |anchor| is used to determine the image scale factor to use.
   void PreloadIcons(PaginationModel* pagination_model,
                     views::View* anchor);
 
   // Invoked when |icon_loading_wait_timer_| fires.
   void OnIconLoadingWaitTimer();
@@ skipping 25 matching lines @@
   base::OneShotTimer<AppListMainView> icon_loading_wait_timer_;
 
   ScopedVector<IconLoader> pending_icon_loaders_;
 
   DISALLOW_COPY_AND_ASSIGN(AppListMainView);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_VIEWS_APP_LIST_MAIN_VIEW_H_