Implement ui for re-parenting an item from an app list folder to another position or folder in the …

ui/app_list/views/app_list_folder_view.h

Index: ui/app_list/views/app_list_folder_view.h
diff --git a/ui/app_list/views/app_list_folder_view.h b/ui/app_list/views/app_list_folder_view.h
index 7052588179b10b2b6fbcf9aef86f4eb07e8a3eed..72b8fc5bd3e87d27d723fd39d6986d5319771062 100644
--- a/ui/app_list/views/app_list_folder_view.h
+++ b/ui/app_list/views/app_list_folder_view.h
@@ -6,6 +6,7 @@
 #define UI_APP_LIST_VIEWS_APP_LIST_FOLDER_VIEW_H_
 
 #include "ui/app_list/app_list_item_list_observer.h"
+#include "ui/app_list/views/apps_grid_view.h"
 #include "ui/app_list/views/folder_header_view.h"
 #include "ui/app_list/views/folder_header_view_delegate.h"
 #include "ui/compositor/layer_animation_observer.h"
@@ -25,6 +26,7 @@ namespace app_list {
 class AppsContainerView;
 class AppsGridView;
 class AppListFolderItem;
+class AppListItemView;
 class AppListMainView;
 class AppListModel;
 class FolderHeaderView;
@@ -44,12 +46,41 @@ class AppListFolderView : public views::View,
   void SetAppListFolderItem(AppListFolderItem* folder);
 
   // Schedules an animation to show or hide the view.
-  void ScheduleShowHideAnimation(bool show);
+  // If |show| is false, the view should be set to invisible after the
+  // animation is done unless |hide_for_reparent| is true.
+  void ScheduleShowHideAnimation(bool show, bool hide_for_reparent);
 
   // Gets icon image bounds of the item at |index|, relative to
   // AppListFolderView.
   gfx::Rect GetItemIconBoundsAt(int index);
 
+  // Updates the folder view background to show or hide folder container ink
+  // bubble.
+  void UpdateFolderViewBackground(bool show_bubble);
+
+  void UpdateFolderNameVisibility(bool visible);
+
+  // Returns true if |point| falls outside of the folder container ink bubble.
+  bool IsPointOutsideOfFolderBoundray(const gfx::Point& point);
+
+  // Called when a folder item is dragged out of the folder to be re-parented.
+  // |original_drag_view| is the |drag_view_| inside the folder's grid view.
+  // |drag_point_in_folder_grid| is the last drag point in coordinate of the
+  // AppsGridView inside the folder.
+  void ReparentItem(AppListItemView* original_drag_view,
+      const gfx::Point& drag_point_in_folder_grid);
+
+  // Dispatches drag event from the hidden grid view to the root level grid view
+  // for re-parenting a folder item.
+  void DispatchDragEventForReparent(AppsGridView::Pointer pointer,
+      const ui::LocatedEvent& event);
+
+  // Dispatches EndDrag event from the hidden grid view to the root level grid
+  // view for reparenting a folder item.
+  // |events_forwarded_to_drag_drop_host|: True if the dragged item is dropped
+  // to the drag_drop_host, eg. dropped on shelf.
+  void DispatchEndDragEventForReparent(bool events_forwarded_to_drag_drop_host);
+
   // views::View overrides:
   virtual gfx::Size GetPreferredSize() OVERRIDE;
   virtual void Layout() OVERRIDE;
@@ -61,9 +92,19 @@ class AppListFolderView : public views::View,
   // ui::ImplicitAnimationObserver overrides:
   virtual void OnImplicitAnimationsCompleted() OVERRIDE;
 
+  AppsGridView* items_grid_view() { return items_grid_view_; }
+  bool hide_for_reparent() const { return hide_for_reparent_; }
+
  private:
   void CalculateIdealBounds();
 
+  // Starts setting up drag in root level apps grid view for re-parenting a
+  // folder item.
+  // |drag_point_in_root_grid| is in the cooridnates of root level AppsGridView.
+  void StartSetupDragInRootLevelAppsGridView(
+      AppListItemView* original_drag_view,
+      const gfx::Point& drag_point_in_root_grid);
+
   // Overridden from FolderHeaderViewDelegate:
   virtual void NavigateBack(AppListFolderItem* item,
                             const ui::Event& event_flags) OVERRIDE;
@@ -79,6 +120,8 @@ class AppListFolderView : public views::View,
 
   scoped_ptr<PaginationModel> pagination_model_;
 
+  bool hide_for_reparent_;
+
   DISALLOW_COPY_AND_ASSIGN(AppListFolderView);
 };