GTK: Implement the bookmark bar chevron....

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>
@@ skipping 66 matching lines @@
   virtual void AnimationEnded(const Animation* animation);
 
  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);
+
   // 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);
 
   // Invoked when a node has moved.
@@ skipping 61 matching lines @@
   static gboolean OnToolbarDragMotion(GtkToolbar* toolbar,
                                       GdkDragContext* context,
                                       gint x,
                                       gint y,
                                       guint time,
                                       BookmarkBarGtk* bar);
   static void OnToolbarDragLeave(GtkToolbar* toolbar,
                                  GdkDragContext* context,
                                  guint time,
                                  BookmarkBarGtk* bar);
+  static void OnToolbarSizeAllocate(GtkWidget* widget,
+                                    GtkAllocation* allocation,
+                                    BookmarkBarGtk* bar);
 
   // Used for both folder buttons and the toolbar.
   static void OnDragReceived(GtkWidget* widget,
                              GdkDragContext* context,
                              gint x, gint y,
                              GtkSelectionData* selection_data,
                              guint target_type, guint time,
                              BookmarkBarGtk* bar);
 
   // GtkEventBox callbacks.
@@ skipping 22 matching lines @@
 
   // Used to position all children.
   GtkWidget* bookmark_hbox_;
 
   // A GtkLabel to display when there are no bookmark buttons to display.
   GtkWidget* instructions_;
 
   // GtkToolbar which contains all the bookmark buttons.
   OwnedWidgetGtk bookmark_toolbar_;
 
+  // The button that shows extra bookmarks that don't fit on the bookmark
+  // bar.
+  GtkWidget* overflow_button_;
+
   // The other bookmarks button.
   GtkWidget* other_bookmarks_button_;
 
   // The BookmarkNode from the model being dragged. NULL when we aren't
   // dragging.
   const BookmarkNode* dragged_node_;
 
   // We create a GtkToolbarItem from |dragged_node_| for display.
   GtkToolItem* toolbar_drop_item_;
 
@@ skipping 10 matching lines @@
   // 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_