Make the bookmark toolbar folders act like a menu bar....

chrome/browser/gtk/bookmark_bar_gtk.h

 // Copyright (c) 2009 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 CHROME_BROWSER_GTK_BOOKMARK_BAR_GTK_H_
 #define CHROME_BROWSER_GTK_BOOKMARK_BAR_GTK_H_
 
 #include <gtk/gtk.h>
 
 #include <string>
+#include <vector>
 
 #include "app/slide_animation.h"
 #include "base/scoped_ptr.h"
 #include "chrome/browser/bookmarks/bookmark_model_observer.h"
+#include "chrome/browser/gtk/menu_bar_helper.h"
 #include "chrome/browser/gtk/view_id_util.h"
 #include "chrome/common/notification_observer.h"
 #include "chrome/common/notification_registrar.h"
 #include "chrome/common/owned_widget_gtk.h"
 
 class BookmarkContextMenu;
 class BookmarkMenuController;
 class Browser;
 class BrowserWindowGtk;
 class CustomContainerButton;
 class PageNavigator;
 class Profile;
 struct GtkThemeProvider;
 
 class BookmarkBarGtk : public AnimationDelegate,
                        public BookmarkModelObserver,
+                       public MenuBarHelper::Delegate,
                        public NotificationObserver {
  public:
   explicit BookmarkBarGtk(Profile* profile, Browser* browser,
                           BrowserWindowGtk* window);
   virtual ~BookmarkBarGtk();
 
   // Resets the profile. This removes any buttons for the current profile and
   // recreates the models.
   void SetProfile(Profile* profile);
 
@@ skipping 28 matching lines @@
   // Returns true if the bookmark bar is showing an animation.
   bool IsAnimating();
 
   // Returns true if the bookmarks bar preference is set to 'always show'.
   bool IsAlwaysShown();
 
   // AnimationDelegate implementation ------------------------------------------
   virtual void AnimationProgressed(const Animation* animation);
   virtual void AnimationEnded(const Animation* animation);
 
+  // MenuBarHelper::Delegate implementation ------------------------------------
+  virtual void PopupForButton(GtkWidget* button);
+  virtual void PopupForButtonNextTo(GtkWidget* button,
+                                    GtkMenuDirectionType dir);
  private:
   // Helper function which generates GtkToolItems for |bookmark_toolbar_|.
   void CreateAllBookmarkButtons();
 
   // Sets the visibility of the instructional text based on whether there are
   // any bookmarks in the bookmark bar node.
   void SetInstructionState();
 
   // Sets the visibility of the overflow chevron.
   void SetChevronState();
 
   // Helper function which destroys all the bookmark buttons in the GtkToolbar.
   void RemoveAllBookmarkButtons();
 
   // Returns the number of buttons corresponding to starred urls/groups. This
   // is equivalent to the number of children the bookmark bar node from the
   // bookmark bar model has.
   int GetBookmarkButtonCount();
 
   // Set the appearance of the overflow button appropriately (either chromium
   // style or GTK style).
   void SetOverflowButtonAppearance();
 
   // Returns the index of the first bookmark that is not visible on the bar.
   // Returns -1 if they are all visible.
   // |extra_space| is how much extra space to give the toolbar during the
   // calculation (for the purposes of determining if ditching the chevron
   // would be a good idea).
-  int GetFirstHiddenBookmark(int extra_space);
+  // If non-NULL, |showing_folders| is packed with all the folders that are
+  // showing on the bar.
+  int GetFirstHiddenBookmark(int extra_space,
+                             std::vector<GtkWidget*>* showing_folders);
 
   // Overridden from BookmarkModelObserver:
 
   // Invoked when the bookmark model has finished loading. Creates a button
   // for each of the children of the root node from the model.
   virtual void Loaded(BookmarkModel* model);
 
   // Invoked when the model is being deleted.
   virtual void BookmarkModelBeingDeleted(BookmarkModel* model);
 
@@ skipping 127 matching lines @@
 
   // We create a GtkToolbarItem from |dragged_node_| for display.
   GtkToolItem* toolbar_drop_item_;
 
   // Theme provider for building buttons.
   GtkThemeProvider* theme_provider_;
 
   // Whether we should show the instructional text in the bookmark bar.
   bool show_instructions_;
 
+  MenuBarHelper menu_bar_helper_;
+
   // The last displayed right click menu, or NULL if no menus have been
   // displayed yet.
   scoped_ptr<BookmarkContextMenu> current_context_menu_;
 
   // The last displayed left click menu, or NULL if no menus have been
   // displayed yet.
   scoped_ptr<BookmarkMenuController> current_menu_;
 
   scoped_ptr<SlideAnimation> slide_animation_;
 
   NotificationRegistrar registrar_;
 };
 
 #endif  // CHROME_BROWSER_GTK_BOOKMARK_BAR_GTK_H_