Refactor app list event handling and prerendering.

ui/app_list/views/apps_container_view.h

Index: ui/app_list/views/apps_container_view.h
diff --git a/ui/app_list/views/apps_container_view.h b/ui/app_list/views/apps_container_view.h
index 3278385fdbda56a2d40d2a683bd569bbc4e733c7..1988a98b4d3ab4038265504e36c6cdf43caeccdd 100644
--- a/ui/app_list/views/apps_container_view.h
+++ b/ui/app_list/views/apps_container_view.h
@@ -21,6 +21,7 @@ class AppListMainView;
 class AppListModel;
 class ContentsView;
 class FolderBackgroundView;
+class PaginationModel;
 
 // AppsContainerView contains a root level AppsGridView to render the root level
 // app items, and a AppListFolderView to render the app items inside the
@@ -61,6 +62,11 @@ class AppsContainerView : public views::View,
   virtual gfx::Size GetPreferredSize() const OVERRIDE;
   virtual void Layout() OVERRIDE;
   virtual bool OnKeyPressed(const ui::KeyEvent& event) OVERRIDE;
+  virtual bool OnMouseWheel(const ui::MouseWheelEvent& event) OVERRIDE;
+
+  // Overridden from ui::EventHandler:
+  virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
+  virtual void OnScrollEvent(ui::ScrollEvent* event) OVERRIDE;

[calamity, 2014/08/26 08:12:34]

Should this be part of the AppsGridView instead?

[Matt Giuca, 2014/08/28 00:35:21]

Done.

 
   // TopIconAnimationObserver overrides:
   virtual void OnTopIconAnimationsComplete() OVERRIDE;
@@ -87,6 +93,9 @@ class AppsContainerView : public views::View,
   // bottom left, bottom right.
   Rects GetTopItemIconBoundsInActiveFolder();
 
+  // Gets the PaginationModel owned by the AppsGridView.
+  PaginationModel* GetPaginationModel();
+
   // Creates the transitional views for animating the top items in the folder
   // when opening or closing a folder.
   void CreateViewsForFolderTopItemsAnimation(