Experimental app list: Change transition animations of top-level pages.

ui/app_list/views/contents_view.h

Index: ui/app_list/views/contents_view.h
diff --git a/ui/app_list/views/contents_view.h b/ui/app_list/views/contents_view.h
index 17ecf9366e29ae6988ce2bacfb969a3303db6ba1..effd004fa7002f54b88d70ddab537f5c19627d89 100644
--- a/ui/app_list/views/contents_view.h
+++ b/ui/app_list/views/contents_view.h
@@ -15,6 +15,10 @@
 #include "ui/app_list/pagination_model_observer.h"
 #include "ui/views/view.h"
 
+namespace gfx {
+class Rect;
+}
+
 namespace views {
 class ViewModel;
 }
@@ -84,7 +88,11 @@ class APP_LIST_EXPORT ContentsView : public views::View,
   // True if |named_page| is the current active laucher page.
   bool IsNamedPageActive(NamedPage named_page) const;
 
-  // Gets the index of a launcher page in |view_model_|, by NamedPage.
+  // True if |page_index| is the index of |named_page|.
+  bool IndexIsNamedPage(int page_index, NamedPage named_page) const;

[calamity, 2014/09/10 01:56:40]

Can we have GetPageIndexForNamedPage() return -1 if the NamedPage isn't found to
avoid bloating the API?

[Matt Giuca, 2014/09/10 03:15:30]

Done.

+
+  // Gets the index of a launcher page in |view_model_|, by NamedPage. The given
+  // |named_page| must have a view in the view model.
   int GetPageIndexForNamedPage(NamedPage named_page) const;
 
   int NumLauncherPages() const;
@@ -121,6 +129,10 @@ class APP_LIST_EXPORT ContentsView : public views::View,
   // Invoked when active view is changed.
   void ActivePageChanged(bool show_search_results);
 
+  // Gets the origin (the off-screen resting place) for a given launcher page
+  // with index |page_index|. |bounds| is the contents bounds for this view.
+  int PageOrigin(const gfx::Rect& bounds, int page_index) const;

[calamity, 2014/09/10 01:56:40]

Can this return a gfx::Rect() so that it's actually an origin?

Maybe change the name to (Get)?OffscreenPageBounds().

[Matt Giuca, 2014/09/10 03:15:30]

Done & Done.

+
   // Calculates and sets the bounds for the subviews. If there is currently an
   // animation, this positions the views as appropriate for the current frame.
   void UpdatePageBounds();