]> Pileus Git - ~andy/gtk/blobdiff - gtk/gtktreeview.c
docs: Typo fix
[~andy/gtk] / gtk / gtktreeview.c
index 1fe6031194b33ae688988ddd20b41b95ba668867..4544c6f6da614c1c7f31bc43bb8659e8c0226bac 100644 (file)
@@ -12,9 +12,7 @@
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
  */
 
 
@@ -24,6 +22,8 @@
 #include <string.h>
 
 #include "gtktreeview.h"
+
+#include "gtkadjustment.h"
 #include "gtkrbtree.h"
 #include "gtktreednd.h"
 #include "gtktreeprivate.h"
 #include "gtkwidgetprivate.h"
 #include "gtkentryprivate.h"
 #include "gtkstylecontextprivate.h"
+#include "gtkcssstylepropertyprivate.h"
 #include "gtktypebuiltins.h"
 #include "gtkmain.h"
-#include "a11y/gtktreeviewaccessible.h"
+#include "gtksettings.h"
+#include "gtkwidgetpath.h"
+#include "a11y/gtktreeviewaccessibleprivate.h"
 
 
 /**
@@ -152,6 +155,12 @@ enum
   RUBBER_BAND_ACTIVE = 2
 };
 
+typedef enum {
+  CLEAR_AND_SELECT = (1 << 0),
+  CLAMP_NODE       = (1 << 1),
+  CURSOR_INVALID   = (1 << 2)
+} SetCursorFlags;
+
  /* This lovely little value is used to determine how far away from the title bar
   * you can move the mouse and still have a column drag work.
   */
@@ -230,7 +239,6 @@ enum
 #define GTK_TREE_VIEW_PRIORITY_SCROLL_SYNC (GTK_TREE_VIEW_PRIORITY_VALIDATE + 2)
 #define GTK_TREE_VIEW_TIME_MS_PER_IDLE 30
 #define SCROLL_EDGE_SIZE 15
-#define EXPANDER_EXTRA_PADDING 4
 #define GTK_TREE_VIEW_SEARCH_DIALOG_TIMEOUT 5000
 #define AUTO_EXPAND_TIMEOUT 500
 
@@ -308,7 +316,6 @@ struct _GtkTreeViewPrivate
   guint scroll_sync_timer;
 
   /* Indentation and expander layout */
-  gint expander_size;
   GtkTreeViewColumn *expander_column;
 
   gint level_indentation;
@@ -317,7 +324,8 @@ struct _GtkTreeViewPrivate
   gint cursor_offset;
 
   GtkTreeRowReference *anchor;
-  GtkTreeRowReference *cursor;
+  GtkRBNode *cursor_node;
+  GtkRBTree *cursor_tree;
 
   GtkTreeViewColumn *focus_column;
 
@@ -376,12 +384,10 @@ struct _GtkTreeViewPrivate
   gint drag_pos;
   gint x_drag;
 
-  /* Non-interactive Header Resizing, expand flag support */
-  gint prev_width;
-
-  gint last_extra_space;
-  gint last_extra_space_per_column;
-  gint last_number_of_expand_columns;
+  /* Column width allocation */
+  gint minimum_width;
+  gint natural_width;
+  gint n_expand_columns;
 
   /* ATK Hack */
   GtkTreeDestroyCountFunc destroy_count_func;
@@ -455,6 +461,7 @@ struct _GtkTreeViewPrivate
   guint fixed_height_mode : 1;
   guint fixed_height_check : 1;
 
+  guint activate_on_single_click : 1;
   guint reorderable : 1;
   guint header_has_focus : 1;
   guint drag_column_window_state : 3;
@@ -485,8 +492,6 @@ struct _GtkTreeViewPrivate
 
   guint in_grab : 1;
 
-  guint post_validation_flag : 1;
-
   /* Whether our key press handler is to avoid sending an unhandled binding to the search entry */
   guint search_entry_avoid_unhandled_binding : 1;
 
@@ -551,7 +556,8 @@ enum {
   PROP_RUBBER_BANDING,
   PROP_ENABLE_GRID_LINES,
   PROP_ENABLE_TREE_LINES,
-  PROP_TOOLTIP_COLUMN
+  PROP_TOOLTIP_COLUMN,
+  PROP_ACTIVATE_ON_SINGLE_CLICK
 };
 
 /* object signals */
@@ -576,9 +582,6 @@ static void     gtk_tree_view_get_preferred_width  (GtkWidget        *widget,
 static void     gtk_tree_view_get_preferred_height (GtkWidget        *widget,
                                                    gint             *minimum,
                                                    gint             *natural);
-static void     gtk_tree_view_size_request         (GtkWidget        *widget,
-                                                   GtkRequisition   *requisition,
-                                                    gboolean          may_validate);
 static void     gtk_tree_view_size_allocate        (GtkWidget        *widget,
                                                    GtkAllocation    *allocation);
 static gboolean gtk_tree_view_draw                 (GtkWidget        *widget,
@@ -707,7 +710,7 @@ static gboolean validate_row             (GtkTreeView *tree_view,
 static void     validate_visible_area    (GtkTreeView *tree_view);
 static gboolean validate_rows_handler    (GtkTreeView *tree_view);
 static gboolean do_validate_rows         (GtkTreeView *tree_view,
-                                         gboolean     size_request);
+                                         gboolean     queue_resize);
 static gboolean validate_rows            (GtkTreeView *tree_view);
 static gboolean presize_handler_callback (gpointer     data);
 static void     install_presize_handler  (GtkTreeView *tree_view);
@@ -745,9 +748,6 @@ static void     gtk_tree_view_get_arrow_xrange               (GtkTreeView
                                                              GtkRBTree          *tree,
                                                              gint               *x1,
                                                              gint               *x2);
-static gint     gtk_tree_view_new_column_width               (GtkTreeView        *tree_view,
-                                                             gint                i,
-                                                             gint               *x);
 static void     gtk_tree_view_adjustment_changed             (GtkAdjustment      *adjustment,
                                                              GtkTreeView        *tree_view);
 static void     gtk_tree_view_build_tree                     (GtkTreeView        *tree_view,
@@ -785,8 +785,7 @@ static gboolean gtk_tree_view_real_expand_row                (GtkTreeView
                                                              gboolean            animate);
 static void     gtk_tree_view_real_set_cursor                (GtkTreeView        *tree_view,
                                                              GtkTreePath        *path,
-                                                             gboolean            clear_and_select,
-                                                             gboolean            clamp_node);
+                                                              SetCursorFlags      flags);
 static gboolean gtk_tree_view_has_can_focus_cell             (GtkTreeView        *tree_view);
 static void     column_sizing_notify                         (GObject            *object,
                                                               GParamSpec         *pspec,
@@ -1177,6 +1176,22 @@ gtk_tree_view_class_init (GtkTreeViewClass *class)
                                                       -1,
                                                       GTK_PARAM_READWRITE));
 
+  /**
+   * GtkTreeView:activate-on-single-click:
+   *
+   * The activate-on-single-click property specifies whether the "row-activated" signal
+   * will be emitted after a single click.
+   *
+   * Since: 3.8
+   */
+  g_object_class_install_property (o_class,
+                                   PROP_ACTIVATE_ON_SINGLE_CLICK,
+                                   g_param_spec_boolean ("activate-on-single-click",
+                                                        P_("Activate on Single Click"),
+                                                        P_("Activate row on a single click"),
+                                                        FALSE,
+                                                        GTK_PARAM_READWRITE));
+
   /* Style properties */
 #define _TREE_VIEW_EXPANDER_SIZE 14
 #define _TREE_VIEW_VERTICAL_SEPARATOR 2
@@ -1273,10 +1288,12 @@ gtk_tree_view_class_init (GtkTreeViewClass *class)
    * @column: the #GtkTreeViewColumn in which the activation occurred
    *
    * The "row-activated" signal is emitted when the method
-   * gtk_tree_view_row_activated() is called or the user double clicks 
-   * a treeview row. It is also emitted when a non-editable row is 
-   * selected and one of the keys: Space, Shift+Space, Return or 
-   * Enter is pressed.
+   * gtk_tree_view_row_activated() is called, when the user double
+   * clicks a treeview row with the "activate-on-single-click"
+   * property set to %FALSE, or when the user single clicks a row when
+   * the "activate-on-single-click" property set to %TRUE. It is also
+   * emitted when a non-editable row is selected and one of the keys:
+   * Space, Shift+Space, Return or Enter is pressed.
    * 
    * For selection handling refer to the <link linkend="TreeWidget">tree 
    * widget conceptual overview</link> as well as #GtkTreeSelection.
@@ -1711,6 +1728,7 @@ gtk_tree_view_init (GtkTreeView *tree_view)
   tree_view->priv->show_expanders = TRUE;
   tree_view->priv->draw_keyfocus = TRUE;
   tree_view->priv->headers_visible = TRUE;
+  tree_view->priv->activate_on_single_click = FALSE;
 
   /* We need some padding */
   tree_view->priv->dy = 0;
@@ -1719,6 +1737,9 @@ gtk_tree_view_init (GtkTreeView *tree_view)
   tree_view->priv->header_height = 1;
   tree_view->priv->x_drag = 0;
   tree_view->priv->drag_pos = -1;
+  tree_view->priv->minimum_width = 0;
+  tree_view->priv->natural_width = 0;
+  tree_view->priv->n_expand_columns = 0;
   tree_view->priv->header_has_focus = FALSE;
   tree_view->priv->pressed_button = -1;
   tree_view->priv->press_start_x = -1;
@@ -1751,8 +1772,6 @@ gtk_tree_view_init (GtkTreeView *tree_view)
 
   tree_view->priv->tooltip_column = -1;
 
-  tree_view->priv->post_validation_flag = FALSE;
-
   tree_view->priv->last_button_x = -1;
   tree_view->priv->last_button_y = -1;
 
@@ -1761,6 +1780,9 @@ gtk_tree_view_init (GtkTreeView *tree_view)
 
   gtk_tree_view_do_set_vadjustment (tree_view, NULL);
   gtk_tree_view_do_set_hadjustment (tree_view, NULL);
+
+  gtk_style_context_add_class (gtk_widget_get_style_context (GTK_WIDGET (tree_view)),
+                               GTK_STYLE_CLASS_VIEW);
 }
 
 \f
@@ -1845,6 +1867,9 @@ gtk_tree_view_set_property (GObject         *object,
     case PROP_TOOLTIP_COLUMN:
       gtk_tree_view_set_tooltip_column (tree_view, g_value_get_int (value));
       break;
+    case PROP_ACTIVATE_ON_SINGLE_CLICK:
+      gtk_tree_view_set_activate_on_single_click (tree_view, g_value_get_boolean (value));
+      break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
@@ -1926,6 +1951,9 @@ gtk_tree_view_get_property (GObject    *object,
     case PROP_TOOLTIP_COLUMN:
       g_value_set_int (value, tree_view->priv->tooltip_column);
       break;
+    case PROP_ACTIVATE_ON_SINGLE_CLICK:
+      g_value_set_boolean (value, tree_view->priv->activate_on_single_click);
+      break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
@@ -2055,9 +2083,6 @@ gtk_tree_view_destroy (GtkWidget *widget)
       tree_view->priv->destroy_count_data = NULL;
     }
 
-  gtk_tree_row_reference_free (tree_view->priv->cursor);
-  tree_view->priv->cursor = NULL;
-
   gtk_tree_row_reference_free (tree_view->priv->anchor);
   tree_view->priv->anchor = NULL;
 
@@ -2180,11 +2205,22 @@ gtk_tree_view_map (GtkWidget *widget)
   gdk_window_show (gtk_widget_get_window (widget));
 }
 
+static void
+gtk_tree_view_ensure_background (GtkTreeView *tree_view)
+{
+  GtkStyleContext *context;
+
+  context = gtk_widget_get_style_context (GTK_WIDGET (tree_view));
+
+  gtk_style_context_set_background (context, tree_view->priv->bin_window);
+  gtk_style_context_set_background (context, gtk_widget_get_window (GTK_WIDGET (tree_view)));
+  gtk_style_context_set_background (context, tree_view->priv->header_window);
+}
+
 static void
 gtk_tree_view_realize (GtkWidget *widget)
 {
   GtkAllocation allocation;
-  GtkStyleContext *context;
   GtkTreeView *tree_view = GTK_TREE_VIEW (widget);
   GdkWindow *window;
   GdkWindowAttr attributes;
@@ -2210,7 +2246,7 @@ gtk_tree_view_realize (GtkWidget *widget)
   window = gdk_window_new (gtk_widget_get_parent_window (widget),
                            &attributes, attributes_mask);
   gtk_widget_set_window (widget, window);
-  gdk_window_set_user_data (window, widget);
+  gtk_widget_register_window (widget, window);
 
   gtk_widget_get_allocation (widget, &allocation);
 
@@ -2221,6 +2257,7 @@ gtk_tree_view_realize (GtkWidget *widget)
   attributes.height = allocation.height;
   attributes.event_mask = (GDK_EXPOSURE_MASK |
                            GDK_SCROLL_MASK |
+                           GDK_SMOOTH_SCROLL_MASK |
                            GDK_POINTER_MOTION_MASK |
                            GDK_ENTER_NOTIFY_MASK |
                            GDK_LEAVE_NOTIFY_MASK |
@@ -2230,7 +2267,7 @@ gtk_tree_view_realize (GtkWidget *widget)
 
   tree_view->priv->bin_window = gdk_window_new (window,
                                                &attributes, attributes_mask);
-  gdk_window_set_user_data (tree_view->priv->bin_window, widget);
+  gtk_widget_register_window (widget, tree_view->priv->bin_window);
 
   gtk_widget_get_allocation (widget, &allocation);
 
@@ -2251,16 +2288,9 @@ gtk_tree_view_realize (GtkWidget *widget)
 
   tree_view->priv->header_window = gdk_window_new (window,
                                                   &attributes, attributes_mask);
-  gdk_window_set_user_data (tree_view->priv->header_window, widget);
-
-  context = gtk_widget_get_style_context (widget);
-
-  gtk_style_context_save (context);
-  gtk_style_context_add_class (context, GTK_STYLE_CLASS_VIEW);
-  gtk_style_context_set_background (context, tree_view->priv->bin_window);
-  gtk_style_context_restore (context);
+  gtk_widget_register_window (widget, tree_view->priv->header_window);
 
-  gtk_style_context_set_background (context, tree_view->priv->header_window);
+  gtk_tree_view_ensure_background (tree_view);
 
   tmp_list = tree_view->priv->children;
   while (tmp_list)
@@ -2286,7 +2316,6 @@ gtk_tree_view_unrealize (GtkWidget *widget)
 {
   GtkTreeView *tree_view = GTK_TREE_VIEW (widget);
   GtkTreeViewPrivate *priv = tree_view->priv;
-  GtkStyleContext *context;
   GList *list;
 
   if (priv->scroll_timeout != 0)
@@ -2307,9 +2336,6 @@ gtk_tree_view_unrealize (GtkWidget *widget)
       priv->open_dest_timeout = 0;
     }
 
-  context = gtk_widget_get_style_context (widget);
-  gtk_style_context_cancel_animations (context, NULL);
-
   if (priv->presize_handler_timer != 0)
     {
       g_source_remove (priv->presize_handler_timer);
@@ -2337,24 +2363,24 @@ gtk_tree_view_unrealize (GtkWidget *widget)
   for (list = priv->columns; list; list = list->next)
     _gtk_tree_view_column_unrealize_button (GTK_TREE_VIEW_COLUMN (list->data));
 
-  gdk_window_set_user_data (priv->bin_window, NULL);
+  gtk_widget_unregister_window (widget, priv->bin_window);
   gdk_window_destroy (priv->bin_window);
   priv->bin_window = NULL;
 
-  gdk_window_set_user_data (priv->header_window, NULL);
+  gtk_widget_unregister_window (widget, priv->header_window);
   gdk_window_destroy (priv->header_window);
   priv->header_window = NULL;
 
   if (priv->drag_window)
     {
-      gdk_window_set_user_data (priv->drag_window, NULL);
+      gtk_widget_unregister_window (widget, priv->drag_window);
       gdk_window_destroy (priv->drag_window);
       priv->drag_window = NULL;
     }
 
   if (priv->drag_highlight_window)
     {
-      gdk_window_set_user_data (priv->drag_highlight_window, NULL);
+      gtk_widget_unregister_window (widget, priv->drag_highlight_window);
       gdk_window_destroy (priv->drag_highlight_window);
       priv->drag_highlight_window = NULL;
     }
@@ -2362,9 +2388,9 @@ gtk_tree_view_unrealize (GtkWidget *widget)
   GTK_WIDGET_CLASS (gtk_tree_view_parent_class)->unrealize (widget);
 }
 
-/* GtkWidget::size_request helper */
+/* GtkWidget::get_preferred_height helper */
 static void
-gtk_tree_view_size_request_columns (GtkTreeView *tree_view)
+gtk_tree_view_update_height (GtkTreeView *tree_view)
 {
   GList *list;
 
@@ -2382,88 +2408,134 @@ gtk_tree_view_size_request_columns (GtkTreeView *tree_view)
       gtk_widget_get_preferred_size (button, &requisition, NULL);
       tree_view->priv->header_height = MAX (tree_view->priv->header_height, requisition.height);
     }
-}
 
+  if (tree_view->priv->tree == NULL)
+    tree_view->priv->height = 0;
+  else
+    tree_view->priv->height = tree_view->priv->tree->root->offset;
+}
 
-/* Called only by ::size_request */
 static void
-gtk_tree_view_update_size (GtkTreeView *tree_view)
+gtk_tree_view_get_preferred_width (GtkWidget *widget,
+                                  gint      *minimum,
+                                  gint      *natural)
 {
+  GtkTreeView *tree_view = GTK_TREE_VIEW (widget);
   GList *list;
   GtkTreeViewColumn *column;
-  gint i;
-
-  if (tree_view->priv->model == NULL)
-    {
-      tree_view->priv->width = 0;
-      tree_view->priv->prev_width = 0;                   
-      tree_view->priv->height = 0;
-      return;
-    }
+  gint column_minimum, column_natural;
 
-  tree_view->priv->prev_width = tree_view->priv->width;  
-  tree_view->priv->width = 0;
+  /* we validate some rows initially just to make sure we have some size.
+   * In practice, with a lot of static lists, this should get a good width.
+   */
+  do_validate_rows (tree_view, FALSE);
+  
+  tree_view->priv->minimum_width = 0;
+  tree_view->priv->natural_width = 0;
+  tree_view->priv->n_expand_columns = 0;
 
   /* keep this in sync with size_allocate below */
-  for (list = tree_view->priv->columns, i = 0; list; list = list->next, i++)
+  for (list = tree_view->priv->columns; list; list = list->next)
     {
       column = list->data;
-      if (!gtk_tree_view_column_get_visible (column))
+      if (!gtk_tree_view_column_get_visible (column) || column == tree_view->priv->drag_column)
        continue;
 
-      tree_view->priv->width += _gtk_tree_view_column_request_width (column);
+      _gtk_tree_view_column_request_width (column, &column_minimum, &column_natural);
+      tree_view->priv->minimum_width += column_minimum;
+      tree_view->priv->natural_width += column_natural;
+
+      if (gtk_tree_view_column_get_expand (column))
+       tree_view->priv->n_expand_columns++;
     }
 
-  if (tree_view->priv->tree == NULL)
-    tree_view->priv->height = 0;
-  else
-    tree_view->priv->height = tree_view->priv->tree->root->offset;
+  if (minimum != NULL)
+    *minimum = tree_view->priv->minimum_width;
+  if (natural != NULL)
+    *natural = tree_view->priv->natural_width;
 }
 
 static void
-gtk_tree_view_size_request (GtkWidget      *widget,
-                           GtkRequisition *requisition,
-                            gboolean        may_validate)
+gtk_tree_view_get_preferred_height (GtkWidget *widget,
+                                   gint      *minimum,
+                                   gint      *natural)
 {
   GtkTreeView *tree_view = GTK_TREE_VIEW (widget);
+  gint height;
 
-  if (may_validate)
-    {
-      /* we validate some rows initially just to make sure we have some size.
-       * In practice, with a lot of static lists, this should get a good width.
-       */
-      do_validate_rows (tree_view, FALSE);
-    }
+  gtk_tree_view_update_height (tree_view);
 
-  gtk_tree_view_size_request_columns (tree_view);
-  gtk_tree_view_update_size (GTK_TREE_VIEW (widget));
+  height = tree_view->priv->height + gtk_tree_view_get_effective_header_height (tree_view);
 
-  requisition->width = tree_view->priv->width;
-  requisition->height = tree_view->priv->height + gtk_tree_view_get_effective_header_height (tree_view);
+  if (minimum != NULL)
+    *minimum = height;
+  if (natural != NULL)
+    *natural = height;
 }
 
 static void
-gtk_tree_view_get_preferred_width (GtkWidget *widget,
-                                  gint      *minimum,
-                                  gint      *natural)
+gtk_tree_view_modify_column_width (GtkTreeView       *tree_view,
+                                  GtkTreeViewColumn *column,
+                                  gint               width)
 {
-  GtkRequisition requisition;
+  gboolean is_expand;
+  gint n_expand_others;
+  gint minimum, natural, natural_others;
+  gint expand;
 
-  gtk_tree_view_size_request (widget, &requisition, TRUE);
+  is_expand = gtk_tree_view_column_get_expand (column);
+  n_expand_others = tree_view->priv->n_expand_columns - (is_expand ? 1 : 0);
 
-  *minimum = *natural = requisition.width;
-}
+  _gtk_tree_view_column_request_width (column, &minimum, &natural);
+  natural_others = tree_view->priv->natural_width - natural;
 
-static void
-gtk_tree_view_get_preferred_height (GtkWidget *widget,
-                                   gint      *minimum,
-                                   gint      *natural)
-{
-  GtkRequisition requisition;
+  if (natural_others + width < tree_view->priv->width)
+    {
+      /* There is extra space that needs to be taken up by letting some other
+       * column(s) expand: by default, the last column. */
+      if (!n_expand_others)
+       {
+         GList *last = g_list_last (tree_view->priv->columns);
+         while (!gtk_tree_view_column_get_visible (last->data))
+           last = last->prev;
+
+         if (column == last->data)
+           return;
+
+         gtk_tree_view_column_set_expand (last->data, TRUE);
+         n_expand_others++;
+       }
+
+      /* Now try to make this column expandable also.  Solving the following
+       * equations reveals what the natural width should be to achieve the
+       * desired width after expanding:
+       *
+       *   1. natural + expand = desired_width
+       *   2. natural + natural_others + expand * (n_expand_others + 1) = total_width
+       *
+       * Solution:
+       *   expand = (total_width - natural_others - desired_width) / n_expand_others
+       *
+       * It is possible for the solved natural width to be less than the
+       * minimum; in that case, we cannot let the column expand.
+       */
+      expand = (tree_view->priv->width - natural_others - width) / n_expand_others;
+
+      if (minimum + expand > width)
+       {
+         if (is_expand)
+           gtk_tree_view_column_set_expand (column, FALSE);
+       }
+      else
+       {
+         if (!is_expand)
+           gtk_tree_view_column_set_expand (column, TRUE);
 
-  gtk_tree_view_size_request (widget, &requisition, TRUE);
+         width -= expand;
+       }
+    }
 
-  *minimum = *natural = requisition.height;
+  gtk_tree_view_column_set_fixed_width (column, width);
 }
 
 static int
@@ -2495,12 +2567,9 @@ gtk_tree_view_size_allocate_columns (GtkWidget *widget,
   GList *list, *first_column, *last_column;
   GtkTreeViewColumn *column;
   GtkAllocation widget_allocation;
-  gint width = 0;
-  gint extra, extra_per_column, extra_for_last;
-  gint full_requested_width = 0;
-  gint number_of_expand_columns = 0;
+  gint minimum_width, natural_width, n_expand_columns, width;
+  gint column_minimum, column_natural, column_width;
   gboolean rtl;
-  gboolean update_expand;
   
   tree_view = GTK_TREE_VIEW (widget);
 
@@ -2520,133 +2589,88 @@ gtk_tree_view_size_allocate_columns (GtkWidget *widget,
 
   rtl = (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL);
 
-  /* find out how many extra space and expandable columns we have */
-  for (list = tree_view->priv->columns; list != last_column->next; list = list->next)
-    {
-      column = (GtkTreeViewColumn *)list->data;
-
-      if (!gtk_tree_view_column_get_visible (column))
-       continue;
-
-      full_requested_width += _gtk_tree_view_column_request_width (column);
-
-      if (gtk_tree_view_column_get_expand (column))
-       number_of_expand_columns++;
-    }
-
-  /* Only update the expand value if the width of the widget has changed,
-   * or the number of expand columns has changed, or if there are no expand
-   * columns, or if we didn't have an size-allocation yet after the
-   * last validated node.
-   */
-  update_expand = (width_changed && *width_changed == TRUE)
-      || number_of_expand_columns != tree_view->priv->last_number_of_expand_columns
-      || number_of_expand_columns == 0
-      || tree_view->priv->post_validation_flag == TRUE;
-
-  tree_view->priv->post_validation_flag = FALSE;
-
   gtk_widget_get_allocation (widget, &widget_allocation);
-  if (!update_expand)
-    {
-      extra = tree_view->priv->last_extra_space;
-      extra_for_last = MAX (widget_allocation.width - full_requested_width - extra, 0);
-    }
-  else
-    {
-      extra = MAX (widget_allocation.width - full_requested_width, 0);
-      extra_for_last = 0;
 
-      tree_view->priv->last_extra_space = extra;
-    }
+  minimum_width = tree_view->priv->minimum_width;
+  natural_width = tree_view->priv->natural_width;
+  n_expand_columns = tree_view->priv->n_expand_columns;
 
-  if (number_of_expand_columns > 0)
-    extra_per_column = extra/number_of_expand_columns;
-  else
-    extra_per_column = 0;
+  width = MAX (widget_allocation.width, minimum_width);
 
-  if (update_expand)
+  /* We change the width here.  The user might have been resizing columns,
+   * which changes the total width of the tree view.  This is of
+   * importance for getting the horizontal scroll bar right.
+   */
+  if (tree_view->priv->width != width)
     {
-      tree_view->priv->last_extra_space_per_column = extra_per_column;
-      tree_view->priv->last_number_of_expand_columns = number_of_expand_columns;
+      tree_view->priv->width = width;
+      if (width_changed)
+        *width_changed = TRUE;
     }
 
-  for (list = (rtl ? last_column : first_column); 
-       list != (rtl ? first_column->prev : last_column->next);
-       list = (rtl ? list->prev : list->next)) 
+  /* iterate through columns in reverse order */
+  for (list = (rtl ? first_column : last_column); 
+       list != (rtl ? last_column->next : first_column->prev);
+       list = (rtl ? list->next : list->prev)) 
     {
-      gint column_width;
-
       column = list->data;
 
-      if (!gtk_tree_view_column_get_visible (column))
+      if (!gtk_tree_view_column_get_visible (column) || column == tree_view->priv->drag_column)
        continue;
 
-      /* We need to handle the dragged button specially.
-       */
-      if (column == tree_view->priv->drag_column)
-       {
-         GtkAllocation drag_allocation;
-         GtkWidget    *button;
-
-         button = gtk_tree_view_column_get_button (tree_view->priv->drag_column);
-
-         drag_allocation.x = 0;
-         drag_allocation.y = 0;
-          drag_allocation.width = gdk_window_get_width (tree_view->priv->drag_window);
-          drag_allocation.height = gdk_window_get_height (tree_view->priv->drag_window);
-         gtk_widget_size_allocate (button, &drag_allocation);
-         width += drag_allocation.width;
-         continue;
-       }
-
-      column_width = _gtk_tree_view_column_request_width (column);
+      _gtk_tree_view_column_request_width (column, &column_minimum, &column_natural);
+      
+      column_width = column_natural;
 
-      if (gtk_tree_view_column_get_expand (column))
-       {
-         if (number_of_expand_columns == 1)
+      if (width > natural_width)
+        {
+         /* We need to expand some columns.  If there are none marked to
+          * expand, give all the extra space to the last column. */
+         if (n_expand_columns == 0)
            {
-             /* We add the remander to the last column as
-              * */
-             column_width += extra;
+             column_width = column_natural + (width - natural_width);
            }
-         else
+         else if (gtk_tree_view_column_get_expand (column))
            {
-             column_width += extra_per_column;
-             extra -= extra_per_column;
-             number_of_expand_columns --;
+             column_width = column_natural + (width - natural_width) / n_expand_columns;
+             n_expand_columns--;
            }
-       }
-      else if (number_of_expand_columns == 0 &&
-              list == last_column)
+        }
+      else if (width < natural_width)
        {
-         column_width += extra;
+         /* We need to shrink some columns.  Starting with later columns,
+          * shrink each one down to its minimum width as necessary. */
+         column_width = MAX (column_natural + (width - natural_width), column_minimum);
        }
+       
+      _gtk_tree_view_column_allocate (column, width - column_width, column_width);
+      
+      minimum_width -= column_minimum;
+      natural_width -= column_natural;
+      width -= column_width;
+    }
+}
 
-      /* In addition to expand, the last column can get even more
-       * extra space so all available space is filled up.
-       */
-      if (extra_for_last > 0 && list == last_column)
-       column_width += extra_for_last;
+/* GtkWidget::size_allocate helper */
+static void
+gtk_tree_view_size_allocate_drag_column (GtkWidget *widget)
+{
+  GtkTreeView *tree_view = GTK_TREE_VIEW (widget);
+  GtkAllocation drag_allocation;
+  GtkWidget *button;
 
-      _gtk_tree_view_column_allocate (column, width, column_width);
+  if (tree_view->priv->drag_column == NULL)
+    return;
 
-      width += column_width;
-    }
+  button = gtk_tree_view_column_get_button (tree_view->priv->drag_column);
 
-  /* We change the width here.  The user might have been resizing columns,
-   * which changes the total width of the tree view.  This is of
-   * importance for getting the horizontal scroll bar right.
-   */
-  if (tree_view->priv->width != width)
-    {
-      tree_view->priv->width = width;
-      if (width_changed)
-        *width_changed = TRUE;
-    }
+  drag_allocation.x = 0;
+  drag_allocation.y = 0;
+  drag_allocation.width = gdk_window_get_width (tree_view->priv->drag_window);
+  drag_allocation.height = gdk_window_get_height (tree_view->priv->drag_window);
+  gtk_widget_size_allocate (button, &drag_allocation);
 }
 
-
 static void
 gtk_tree_view_size_allocate (GtkWidget     *widget,
                             GtkAllocation *allocation)
@@ -2685,6 +2709,7 @@ gtk_tree_view_size_allocate (GtkWidget     *widget,
    * tree view (used in updating the adjustments below) might change.
    */
   gtk_tree_view_size_allocate_columns (widget, &width_changed);
+  gtk_tree_view_size_allocate_drag_column (widget);
 
   g_object_freeze_notify (G_OBJECT (tree_view->priv->hadjustment));
   gtk_adjustment_set_page_size (tree_view->priv->hadjustment,
@@ -2717,11 +2742,6 @@ gtk_tree_view_size_allocate (GtkWidget     *widget,
                                                0,
                                                tree_view->priv->width - allocation->width));
            }
-         else
-            gtk_adjustment_set_value (tree_view->priv->hadjustment,
-                                      CLAMP (tree_view->priv->width - (tree_view->priv->prev_width - gtk_adjustment_get_value (tree_view->priv->hadjustment)),
-                                             0,
-                                             tree_view->priv->width - allocation->width));
        }
       else
         {
@@ -2840,6 +2860,20 @@ row_is_separator (GtkTreeView *tree_view,
   return is_separator;
 }
 
+static int
+gtk_tree_view_get_expander_size (GtkTreeView *tree_view)
+{
+  gint expander_size;
+  gint horizontal_separator;
+
+  gtk_widget_style_get (GTK_WIDGET (tree_view),
+                       "expander-size", &expander_size,
+                        "horizontal-separator", &horizontal_separator,
+                       NULL);
+
+  return expander_size + (horizontal_separator / 2);
+}
+
 static gboolean
 gtk_tree_view_button_press (GtkWidget      *widget,
                            GdkEventButton *event)
@@ -2862,6 +2896,10 @@ gtk_tree_view_button_press (GtkWidget      *widget,
                        "horizontal-separator", &horizontal_separator,
                        NULL);
 
+  /* Don't handle extra mouse buttons events, let them bubble up */
+  if (event->button > 5)
+    return FALSE;
   /* Because grab_focus can cause reentrancy, we delay grab_focus until after
    * we're done handling the button press.
    */
@@ -2896,7 +2934,7 @@ gtk_tree_view_button_press (GtkWidget      *widget,
           tree_view->priv->arrow_prelit &&
          gtk_tree_view_draw_expanders (tree_view))
        {
-         if (event->button == 1)
+         if (event->button == GDK_BUTTON_PRIMARY)
            {
              gtk_grab_add (widget);
              tree_view->priv->button_pressed_node = tree_view->priv->prelight_node;
@@ -2924,7 +2962,7 @@ gtk_tree_view_button_press (GtkWidget      *widget,
        }
 
       /* Get the path and the node */
-      path = _gtk_tree_view_find_path (tree_view, tree, node);
+      path = _gtk_tree_path_new_from_rbtree (tree, node);
       path_is_selectable = !row_is_separator (tree_view, NULL, path);
 
       if (!path_is_selectable)
@@ -2973,9 +3011,10 @@ gtk_tree_view_button_press (GtkWidget      *widget,
 
               if (gtk_tree_view_draw_expanders (tree_view))
                {
+                  gint expander_size = gtk_tree_view_get_expander_size (tree_view);
                  if (!rtl)
-                   cell_area.x += depth * tree_view->priv->expander_size;
-                 cell_area.width -= depth * tree_view->priv->expander_size;
+                   cell_area.x += depth * expander_size;
+                 cell_area.width -= depth * expander_size;
                }
            }
          break;
@@ -2988,10 +3027,10 @@ gtk_tree_view_button_press (GtkWidget      *widget,
          return FALSE;
        }
 
-      tree_view->priv->focus_column = column;
+      _gtk_tree_view_set_focus_column (tree_view, column);
 
       /* decide if we edit */
-      if (event->type == GDK_BUTTON_PRESS && event->button == 1 &&
+      if (event->type == GDK_BUTTON_PRESS && event->button == GDK_BUTTON_PRIMARY &&
          !(event->state & gtk_accelerator_get_default_mod_mask ()))
        {
          GtkTreePath *anchor;
@@ -3074,17 +3113,17 @@ gtk_tree_view_button_press (GtkWidget      *widget,
 
           if (event->state & modify_mod_mask)
             {
-              gtk_tree_view_real_set_cursor (tree_view, path, FALSE, TRUE);
+              gtk_tree_view_real_set_cursor (tree_view, path, CLAMP_NODE);
               gtk_tree_view_real_toggle_cursor_row (tree_view);
             }
           else if (event->state & extend_mod_mask)
             {
-              gtk_tree_view_real_set_cursor (tree_view, path, FALSE, TRUE);
+              gtk_tree_view_real_set_cursor (tree_view, path, CLAMP_NODE);
               gtk_tree_view_real_select_cursor_row (tree_view, FALSE);
             }
           else
             {
-              gtk_tree_view_real_set_cursor (tree_view, path, TRUE, TRUE);
+              gtk_tree_view_real_set_cursor (tree_view, path, CLEAR_AND_SELECT | CLAMP_NODE);
             }
 
           tree_view->priv->modify_selection_pressed = FALSE;
@@ -3127,38 +3166,47 @@ gtk_tree_view_button_press (GtkWidget      *widget,
            }
         }
 
-      /* Test if a double click happened on the same row. */
-      if (event->button == 1 && event->type == GDK_BUTTON_PRESS)
+      if (event->button == GDK_BUTTON_PRIMARY && event->type == GDK_BUTTON_PRESS)
         {
-          int double_click_time, double_click_distance;
-
-          g_object_get (gtk_settings_get_default (),
-                        "gtk-double-click-time", &double_click_time,
-                        "gtk-double-click-distance", &double_click_distance,
-                        NULL);
 
-          /* Same conditions as _gdk_event_button_generate */
-          if (tree_view->priv->last_button_x != -1 &&
-              (event->time < tree_view->priv->last_button_time + double_click_time) &&
-              (ABS (event->x - tree_view->priv->last_button_x) <= double_click_distance) &&
-              (ABS (event->y - tree_view->priv->last_button_y) <= double_click_distance))
+          /* Test if a double click happened on the same row. */
+          if (!tree_view->priv->activate_on_single_click)
             {
-              /* We do no longer compare paths of this row and the
-               * row clicked previously.  We use the double click
-               * distance to decide whether this is a valid click,
-               * allowing the mouse to slightly move over another row.
-               */
-              row_double_click = TRUE;
-
-              tree_view->priv->last_button_time = 0;
-              tree_view->priv->last_button_x = -1;
-              tree_view->priv->last_button_y = -1;
+              int double_click_time, double_click_distance;
+
+              g_object_get (gtk_settings_get_default (),
+                            "gtk-double-click-time", &double_click_time,
+                            "gtk-double-click-distance", &double_click_distance,
+                            NULL);
+
+              /* Same conditions as _gdk_event_button_generate */
+              if (tree_view->priv->last_button_x != -1 &&
+                  (event->time < tree_view->priv->last_button_time + double_click_time) &&
+                  (ABS (event->x - tree_view->priv->last_button_x) <= double_click_distance) &&
+                  (ABS (event->y - tree_view->priv->last_button_y) <= double_click_distance))
+                {
+                  /* We do no longer compare paths of this row and the
+                   * row clicked previously.  We use the double click
+                   * distance to decide whether this is a valid click,
+                   * allowing the mouse to slightly move over another row.
+                   */
+                  row_double_click = TRUE;
+
+                  tree_view->priv->last_button_time = 0;
+                  tree_view->priv->last_button_x = -1;
+                  tree_view->priv->last_button_y = -1;
+                }
+              else
+                {
+                  tree_view->priv->last_button_time = event->time;
+                  tree_view->priv->last_button_x = event->x;
+                  tree_view->priv->last_button_y = event->y;
+                }
             }
           else
             {
-              tree_view->priv->last_button_time = event->time;
-              tree_view->priv->last_button_x = event->x;
-              tree_view->priv->last_button_y = event->y;
+              tree_view->priv->button_pressed_node = tree_view->priv->prelight_node;
+              tree_view->priv->button_pressed_tree = tree_view->priv->prelight_tree;
             }
         }
 
@@ -3192,11 +3240,13 @@ gtk_tree_view_button_press (GtkWidget      *widget,
          _gtk_tree_view_column_get_window (column))
        {
          gpointer drag_data;
+         gint column_width, x;
 
          if (event->type == GDK_2BUTTON_PRESS &&
              gtk_tree_view_column_get_sizing (column) != GTK_TREE_VIEW_COLUMN_AUTOSIZE)
            {
-             _gtk_tree_view_column_set_use_resized_width (column, FALSE);
+             gtk_tree_view_column_set_fixed_width (column, -1);
+             gtk_tree_view_column_set_expand (column, FALSE);
              _gtk_tree_view_column_autosize (tree_view, column);
              return TRUE;
            }
@@ -3215,9 +3265,6 @@ gtk_tree_view_button_press (GtkWidget      *widget,
           gtk_grab_add (widget);
           tree_view->priv->in_column_resize = TRUE;
 
-         _gtk_tree_view_column_set_resized_width (column, gtk_tree_view_column_get_width (column) -
-                                                  tree_view->priv->last_extra_space_per_column);
-
          /* block attached dnd signal handler */
          drag_data = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
          if (drag_data)
@@ -3226,8 +3273,13 @@ gtk_tree_view_button_press (GtkWidget      *widget,
                                             0, 0, NULL, NULL,
                                             drag_data);
 
+         column_width = gtk_tree_view_column_get_width (column);
+         gdk_window_get_device_position (tree_view->priv->bin_window,
+                                         gdk_event_get_device ((GdkEvent *) event),
+                                         &x, NULL, NULL);
+
          tree_view->priv->drag_pos = i;
-         tree_view->priv->x_drag = gtk_tree_view_column_get_x_offset (column) + (rtl ? 0 : gtk_tree_view_column_get_width (column));
+         tree_view->priv->x_drag = x + (rtl ? column_width : -column_width);
 
          if (!gtk_widget_has_focus (widget))
            gtk_widget_grab_focus (widget);
@@ -3248,6 +3300,7 @@ gtk_tree_view_button_release_drag_column (GtkWidget      *widget,
   GList *l;
   gboolean rtl;
   GdkDevice *device, *other;
+  GtkStyleContext *context;
 
   tree_view = GTK_TREE_VIEW (widget);
 
@@ -3259,6 +3312,10 @@ gtk_tree_view_button_release_drag_column (GtkWidget      *widget,
 
   /* Move the button back */
   button = gtk_tree_view_column_get_button (tree_view->priv->drag_column);
+
+  context = gtk_widget_get_style_context (button);
+  gtk_style_context_remove_class (context, GTK_STYLE_CLASS_DND);
+
   g_object_ref (button);
   gtk_container_remove (GTK_CONTAINER (tree_view), button);
   gtk_widget_set_parent_window (button, tree_view->priv->header_window);
@@ -3290,7 +3347,9 @@ gtk_tree_view_button_release_drag_column (GtkWidget      *widget,
                                         tree_view->priv->cur_reorder->left_column);
     }
   tree_view->priv->drag_column = NULL;
-  gdk_window_hide (tree_view->priv->drag_window);
+  gtk_widget_unregister_window (widget, tree_view->priv->drag_window);
+  gdk_window_destroy (tree_view->priv->drag_window);
+  tree_view->priv->drag_window = NULL;
 
   for (l = tree_view->priv->column_drag_info; l != NULL; l = l->next)
     g_slice_free (GtkTreeViewColumnReorder, l->data);
@@ -3334,6 +3393,12 @@ gtk_tree_view_button_release_column_resize (GtkWidget      *widget,
   return TRUE;
 }
 
+static gboolean
+button_event_modifies_selection (GdkEventButton *event)
+{
+        return (event->state & (GDK_CONTROL_MASK | GDK_SHIFT_MASK)) != 0;
+}
+
 static gboolean
 gtk_tree_view_button_release (GtkWidget      *widget,
                              GdkEventButton *event)
@@ -3355,16 +3420,15 @@ gtk_tree_view_button_release (GtkWidget      *widget,
   if (tree_view->priv->button_pressed_node == NULL)
     return FALSE;
 
-  if (event->button == 1)
+  if (event->button == GDK_BUTTON_PRIMARY
+      && tree_view->priv->button_pressed_node == tree_view->priv->prelight_node)
     {
-      if (tree_view->priv->button_pressed_node == tree_view->priv->prelight_node &&
-          tree_view->priv->arrow_prelit)
+      if (tree_view->priv->arrow_prelit)
        {
          GtkTreePath *path = NULL;
 
-         path = _gtk_tree_view_find_path (tree_view,
-                                          tree_view->priv->button_pressed_tree,
-                                          tree_view->priv->button_pressed_node);
+         path = _gtk_tree_path_new_from_rbtree (tree_view->priv->button_pressed_tree,
+                                                tree_view->priv->button_pressed_node);
          /* Actually activate the node */
          if (tree_view->priv->button_pressed_node->children == NULL)
            gtk_tree_view_real_expand_row (tree_view, path,
@@ -3377,6 +3441,16 @@ gtk_tree_view_button_release (GtkWidget      *widget,
                                             tree_view->priv->button_pressed_node, TRUE);
          gtk_tree_path_free (path);
        }
+      else if (tree_view->priv->activate_on_single_click
+               && !button_event_modifies_selection (event))
+        {
+          GtkTreePath *path = NULL;
+
+          path = _gtk_tree_path_new_from_rbtree (tree_view->priv->button_pressed_tree,
+                                                 tree_view->priv->button_pressed_node);
+          gtk_tree_view_row_activated (tree_view, path, tree_view->priv->focus_column);
+          gtk_tree_path_free (path);
+        }
 
       gtk_grab_remove (widget);
       tree_view->priv->button_pressed_tree = NULL;
@@ -3456,9 +3530,8 @@ auto_expand_timeout (gpointer data)
 
   if (tree_view->priv->prelight_node)
     {
-      path = _gtk_tree_view_find_path (tree_view,
-                                      tree_view->priv->prelight_tree,
-                                      tree_view->priv->prelight_node);   
+      path = _gtk_tree_path_new_from_rbtree (tree_view->priv->prelight_tree,
+                                            tree_view->priv->prelight_node);
 
       if (tree_view->priv->prelight_node->children)
        gtk_tree_view_collapse_row (tree_view, path);
@@ -3594,12 +3667,12 @@ prelight_or_select (GtkTreeView *tree_view,
            {
              GtkTreePath *path;
              
-             path = _gtk_tree_view_find_path (tree_view, tree, node);
+             path = _gtk_tree_path_new_from_rbtree (tree, node);
              gtk_tree_selection_select_path (tree_view->priv->selection, path);
              if (GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
                {
                   tree_view->priv->draw_keyfocus = FALSE;
-                 gtk_tree_view_real_set_cursor (tree_view, path, FALSE, FALSE);
+                 gtk_tree_view_real_set_cursor (tree_view, path, 0);
                }
              gtk_tree_path_free (path);
            }
@@ -3735,8 +3808,7 @@ gtk_tree_view_motion_draw_column_motion_arrow (GtkTreeView *tree_view)
 
          if (tree_view->priv->drag_highlight_window)
            {
-             gdk_window_set_user_data (tree_view->priv->drag_highlight_window,
-                                       NULL);
+             gtk_widget_unregister_window (GTK_WIDGET (tree_view), tree_view->priv->drag_highlight_window);
              gdk_window_destroy (tree_view->priv->drag_highlight_window);
            }
 
@@ -3752,7 +3824,7 @@ gtk_tree_view_motion_draw_column_motion_arrow (GtkTreeView *tree_view)
          attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK | GDK_EXPOSURE_MASK | GDK_POINTER_MOTION_MASK;
          attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
          tree_view->priv->drag_highlight_window = gdk_window_new (tree_view->priv->header_window, &attributes, attributes_mask);
-         gdk_window_set_user_data (tree_view->priv->drag_highlight_window, GTK_WIDGET (tree_view));
+         gtk_widget_register_window (GTK_WIDGET (tree_view), tree_view->priv->drag_highlight_window);
 
          mask_image = cairo_image_surface_create (CAIRO_FORMAT_A1, width, height);
           cr = cairo_create (mask_image);
@@ -3776,7 +3848,7 @@ gtk_tree_view_motion_draw_column_motion_arrow (GtkTreeView *tree_view)
       GtkAllocation button_allocation;
       GtkWidget    *button;
 
-      width = tree_view->priv->expander_size;
+      width = gtk_tree_view_get_expander_size (tree_view);
 
       /* Get x, y, width, height of arrow */
       gdk_window_get_origin (tree_view->priv->header_window, &x, &y);
@@ -3794,16 +3866,15 @@ gtk_tree_view_motion_draw_column_motion_arrow (GtkTreeView *tree_view)
          x += button_allocation.x - width/2;
          height = button_allocation.height;
        }
-      y -= tree_view->priv->expander_size/2; /* The arrow takes up only half the space */
-      height += tree_view->priv->expander_size;
+      y -= width/2; /* The arrow takes up only half the space */
+      height += width;
 
       /* Create the new window */
       if (tree_view->priv->drag_column_window_state != DRAG_COLUMN_WINDOW_STATE_ARROW)
        {
          if (tree_view->priv->drag_highlight_window)
            {
-             gdk_window_set_user_data (tree_view->priv->drag_highlight_window,
-                                       NULL);
+             gtk_widget_unregister_window (GTK_WIDGET (tree_view), tree_view->priv->drag_highlight_window);
              gdk_window_destroy (tree_view->priv->drag_highlight_window);
            }
 
@@ -3818,7 +3889,7 @@ gtk_tree_view_motion_draw_column_motion_arrow (GtkTreeView *tree_view)
          attributes.height = height;
          tree_view->priv->drag_highlight_window = gdk_window_new (gtk_widget_get_root_window (widget),
                                                                   &attributes, attributes_mask);
-         gdk_window_set_user_data (tree_view->priv->drag_highlight_window, GTK_WIDGET (tree_view));
+         gtk_widget_register_window (GTK_WIDGET (tree_view), tree_view->priv->drag_highlight_window);
 
          mask_image = cairo_image_surface_create (CAIRO_FORMAT_A1, width, height);
 
@@ -3848,11 +3919,12 @@ gtk_tree_view_motion_draw_column_motion_arrow (GtkTreeView *tree_view)
     {
       GtkAllocation allocation;
       GtkWidget    *button;
+      gint          expander_size;
 
-      width = tree_view->priv->expander_size;
+      expander_size = gtk_tree_view_get_expander_size (tree_view);
 
       /* Get x, y, width, height of arrow */
-      width = width/2; /* remember, the arrow only takes half the available width */
+      width = expander_size/2; /* remember, the arrow only takes half the available width */
       gdk_window_get_origin (gtk_widget_get_window (widget),
                              &x, &y);
       if (arrow_type == DRAG_COLUMN_WINDOW_STATE_ARROW_RIGHT)
@@ -3874,8 +3946,8 @@ gtk_tree_view_motion_draw_column_motion_arrow (GtkTreeView *tree_view)
           height = allocation.height;
         }
 
-      y -= tree_view->priv->expander_size;
-      height += 2*tree_view->priv->expander_size;
+      y -= expander_size;
+      height += 2 * expander_size;
 
       /* Create the new window */
       if (tree_view->priv->drag_column_window_state != DRAG_COLUMN_WINDOW_STATE_ARROW_LEFT &&
@@ -3883,8 +3955,7 @@ gtk_tree_view_motion_draw_column_motion_arrow (GtkTreeView *tree_view)
        {
          if (tree_view->priv->drag_highlight_window)
            {
-             gdk_window_set_user_data (tree_view->priv->drag_highlight_window,
-                                       NULL);
+             gtk_widget_unregister_window (GTK_WIDGET (tree_view), tree_view->priv->drag_highlight_window);
              gdk_window_destroy (tree_view->priv->drag_highlight_window);
            }
 
@@ -3897,8 +3968,8 @@ gtk_tree_view_motion_draw_column_motion_arrow (GtkTreeView *tree_view)
           attributes.y = y;
          attributes.width = width;
          attributes.height = height;
-         tree_view->priv->drag_highlight_window = gdk_window_new (NULL, &attributes, attributes_mask);
-         gdk_window_set_user_data (tree_view->priv->drag_highlight_window, GTK_WIDGET (tree_view));
+         tree_view->priv->drag_highlight_window = gdk_window_new (gtk_widget_get_root_window (widget), &attributes, attributes_mask);
+         gtk_widget_register_window (GTK_WIDGET (tree_view), tree_view->priv->drag_highlight_window);
 
          mask_image = cairo_image_surface_create (CAIRO_FORMAT_A1, width, height);
 
@@ -3911,10 +3982,10 @@ gtk_tree_view_motion_draw_column_motion_arrow (GtkTreeView *tree_view)
             }
           cairo_move_to (cr, 0, 0);
           cairo_line_to (cr, width, width);
-          cairo_line_to (cr, 0, tree_view->priv->expander_size);
+          cairo_line_to (cr, 0, expander_size);
           cairo_move_to (cr, 0, height);
           cairo_line_to (cr, width, height - width);
-          cairo_line_to (cr, 0, height - tree_view->priv->expander_size);
+          cairo_line_to (cr, 0, height - expander_size);
           cairo_fill (cr);
           cairo_destroy (cr);
 
@@ -3951,31 +4022,17 @@ gtk_tree_view_motion_resize_column (GtkWidget      *widget,
 
   column = gtk_tree_view_get_column (tree_view, tree_view->priv->drag_pos);
 
-  if (event->is_hint || event->window != gtk_widget_get_window (widget))
-    gdk_window_get_device_position (gtk_widget_get_window (widget),
-                                    gdk_event_get_device ((GdkEvent *) event),
-                                    &x, NULL, NULL);
-  else
-    x = event->x;
-
-  if (tree_view->priv->hadjustment)
-    x += gtk_adjustment_get_value (tree_view->priv->hadjustment);
-
-  new_width = gtk_tree_view_new_column_width (tree_view,
-                                             tree_view->priv->drag_pos, &x);
-  if (x != tree_view->priv->x_drag &&
-      (new_width != gtk_tree_view_column_get_fixed_width (column)))
-    {
-      _gtk_tree_view_column_set_use_resized_width (column, TRUE);
-
-      if (gtk_tree_view_column_get_expand (column))
-       new_width -= tree_view->priv->last_extra_space_per_column;
-
-      _gtk_tree_view_column_set_resized_width (column, new_width);
+  gdk_window_get_device_position (tree_view->priv->bin_window,
+                                 gdk_event_get_device ((GdkEvent *) event),
+                                 &x, NULL, NULL);
 
+  if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
+    new_width = MAX (tree_view->priv->x_drag - x, 0);
+  else
+    new_width = MAX (x - tree_view->priv->x_drag, 0);
 
-      gtk_widget_queue_resize (widget);
-    }
+  if (new_width != gtk_tree_view_column_get_width (column))
+    gtk_tree_view_modify_column_width (tree_view, column, new_width);
 
   return FALSE;
 }
@@ -4113,9 +4170,8 @@ gtk_tree_view_stop_rubber_band (GtkTreeView *tree_view)
       gtk_widget_queue_draw (GTK_WIDGET (tree_view));
 
       /* The anchor path should be set to the start path */
-      tmp_path = _gtk_tree_view_find_path (tree_view,
-                                          tree_view->priv->rubber_band_start_tree,
-                                          tree_view->priv->rubber_band_start_node);
+      tmp_path = _gtk_tree_path_new_from_rbtree (tree_view->priv->rubber_band_start_tree,
+                                                tree_view->priv->rubber_band_start_node);
 
       if (tree_view->priv->anchor)
        gtk_tree_row_reference_free (tree_view->priv->anchor);
@@ -4128,10 +4184,9 @@ gtk_tree_view_stop_rubber_band (GtkTreeView *tree_view)
       gtk_tree_path_free (tmp_path);
 
       /* ... and the cursor to the end path */
-      tmp_path = _gtk_tree_view_find_path (tree_view,
-                                          tree_view->priv->rubber_band_end_tree,
-                                          tree_view->priv->rubber_band_end_node);
-      gtk_tree_view_real_set_cursor (GTK_TREE_VIEW (tree_view), tmp_path, FALSE, FALSE);
+      tmp_path = _gtk_tree_path_new_from_rbtree (tree_view->priv->rubber_band_end_tree,
+                                                 tree_view->priv->rubber_band_end_node);
+      gtk_tree_view_real_set_cursor (GTK_TREE_VIEW (tree_view), tmp_path, 0);
       gtk_tree_path_free (tmp_path);
 
       _gtk_tree_selection_emit_changed (tree_view->priv->selection);
@@ -4175,7 +4230,7 @@ gtk_tree_view_update_rubber_band_selection_range (GtkTreeView *tree_view,
          GtkTreePath *path;
          gboolean selectable;
 
-         path = _gtk_tree_view_find_path (tree_view, start_tree, start_node);
+         path = _gtk_tree_path_new_from_rbtree (start_tree, start_node);
          selectable = _gtk_tree_selection_row_is_selectable (tree_view->priv->selection, start_node, path);
          gtk_tree_path_free (path);
 
@@ -4226,9 +4281,7 @@ skip_first:
       if (start_node->children)
         {
          start_tree = start_node->children;
-         start_node = start_tree->root;
-         while (start_node->left != start_tree->nil)
-           start_node = start_node->left;
+          start_node = _gtk_rbtree_first (start_tree);
        }
       else
         {
@@ -4552,17 +4605,10 @@ draw_empty_focus (GtkTreeView *tree_view, cairo_t *cr)
   if (w > 0 && h > 0)
     {
       GtkStyleContext *context;
-      GtkStateFlags state;
 
       context = gtk_widget_get_style_context (widget);
-      state = gtk_widget_get_state_flags (widget);
-
-      gtk_style_context_save (context);
-      gtk_style_context_set_state (context, state);
 
       gtk_render_focus (context, cr, 1, 1, w, h);
-
-      gtk_style_context_restore (context);
     }
 }
 
@@ -4677,8 +4723,6 @@ gtk_tree_view_bin_draw (GtkWidget      *widget,
   GtkRBTree *tree;
   GList *list;
   GtkRBNode *node;
-  GtkRBNode *cursor = NULL;
-  GtkRBTree *cursor_tree = NULL;
   GtkRBNode *drag_highlight = NULL;
   GtkRBTree *drag_highlight_tree = NULL;
   GtkTreeIter iter;
@@ -4694,31 +4738,27 @@ gtk_tree_view_bin_draw (GtkWidget      *widget,
   gint expander_cell_width;
   gint bin_window_width;
   gint bin_window_height;
-  GtkTreePath *cursor_path;
   GtkTreePath *drag_dest_path;
   GList *first_column, *last_column;
   gint vertical_separator;
   gint horizontal_separator;
-  gint focus_line_width;
   gboolean allow_rules;
   gboolean has_can_focus_cell;
   gboolean rtl;
   gint n_visible_columns;
   gint grid_line_width;
+  gint expander_size;
   gboolean draw_vgrid_lines, draw_hgrid_lines;
   GtkStyleContext *context;
-  GtkStateFlags state;
   gboolean parity;
 
   rtl = (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL);
   context = gtk_widget_get_style_context (widget);
-  state = gtk_widget_get_state_flags (widget);
 
   gtk_widget_style_get (widget,
                        "horizontal-separator", &horizontal_separator,
                        "vertical-separator", &vertical_separator,
                        "allow-rules", &allow_rules,
-                       "focus-line-width", &focus_line_width,
                        NULL);
 
   if (tree_view->priv->tree == NULL)
@@ -4743,7 +4783,6 @@ gtk_tree_view_bin_draw (GtkWidget      *widget,
   if (tree_view->priv->height < bin_window_height)
     {
       gtk_style_context_save (context);
-      gtk_style_context_set_state (context, state);
       gtk_style_context_add_class (context, GTK_STYLE_CLASS_CELL);
 
       gtk_render_background (context, cr,
@@ -4758,25 +4797,15 @@ gtk_tree_view_bin_draw (GtkWidget      *widget,
     return TRUE;
 
   /* find the path for the node */
-  path = _gtk_tree_view_find_path ((GtkTreeView *)widget,
-                                  tree,
-                                  node);
+  path = _gtk_tree_path_new_from_rbtree (tree, node);
   gtk_tree_model_get_iter (tree_view->priv->model,
                           &iter,
                           path);
   depth = gtk_tree_path_get_depth (path);
   gtk_tree_path_free (path);
   
-  cursor_path = NULL;
   drag_dest_path = NULL;
 
-  if (tree_view->priv->cursor)
-    cursor_path = gtk_tree_row_reference_get_path (tree_view->priv->cursor);
-
-  if (cursor_path)
-    _gtk_tree_view_find_node (tree_view, cursor_path,
-                              &cursor_tree, &cursor);
-
   if (tree_view->priv->drag_dest_row)
     drag_dest_path = gtk_tree_row_reference_get_path (tree_view->priv->drag_dest_row);
 
@@ -4790,6 +4819,7 @@ gtk_tree_view_bin_draw (GtkWidget      *widget,
   draw_hgrid_lines =
     tree_view->priv->grid_lines == GTK_TREE_VIEW_GRID_LINES_HORIZONTAL
     || tree_view->priv->grid_lines == GTK_TREE_VIEW_GRID_LINES_BOTH;
+  expander_size = gtk_tree_view_get_expander_size (tree_view);
 
   if (draw_vgrid_lines || draw_hgrid_lines)
     gtk_widget_style_get (widget, "grid-line-width", &grid_line_width, NULL);
@@ -4896,11 +4926,21 @@ gtk_tree_view_bin_draw (GtkWidget      *widget,
           else
             flags &= ~GTK_CELL_RENDERER_SORTED;
 
-         if (cursor == node)
+         if (tree_view->priv->cursor_node == node)
             flags |= GTK_CELL_RENDERER_FOCUSED;
           else
             flags &= ~GTK_CELL_RENDERER_FOCUSED;
 
+          if (GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_PARENT))
+            flags |= GTK_CELL_RENDERER_EXPANDABLE;
+          else
+            flags &= ~GTK_CELL_RENDERER_EXPANDABLE;
+
+          if (node->children)
+            flags |= GTK_CELL_RENDERER_EXPANDED;
+          else
+            flags &= ~GTK_CELL_RENDERER_EXPANDED;
+
          background_area.x = cell_offset;
          background_area.width = width;
 
@@ -4985,7 +5025,7 @@ gtk_tree_view_bin_draw (GtkWidget      *widget,
           gtk_style_context_add_region (context, GTK_STYLE_REGION_ROW, row_flags);
           gtk_style_context_add_region (context, GTK_STYLE_REGION_COLUMN, column_flags);
 
-         if (node == cursor && has_can_focus_cell
+         if (node == tree_view->priv->cursor_node && has_can_focus_cell
               && ((column == tree_view->priv->focus_column
                    && tree_view->priv->draw_keyfocus &&
                    gtk_widget_has_visible_focus (widget))
@@ -5016,9 +5056,10 @@ gtk_tree_view_bin_draw (GtkWidget      *widget,
 
               if (gtk_tree_view_draw_expanders (tree_view))
                {
+                  int expander_size = gtk_tree_view_get_expander_size (tree_view);
                  if (!rtl)
-                   cell_area.x += depth * tree_view->priv->expander_size;
-                 cell_area.width -= depth * tree_view->priv->expander_size;
+                   cell_area.x += depth * expander_size;
+                 cell_area.width -= depth * expander_size;
                }
 
               /* If we have an expander column, the highlight underline
@@ -5118,18 +5159,18 @@ gtk_tree_view_bin_draw (GtkWidget      *widget,
                {
                   gtk_tree_view_draw_line (tree_view, cr,
                                            GTK_TREE_VIEW_TREE_LINE,
-                                           x + tree_view->priv->expander_size * (depth - 1.5) * mult,
+                                           x + expander_size * (depth - 1.5) * mult,
                                            y1,
-                                           x + tree_view->priv->expander_size * (depth - 1.1) * mult,
+                                           x + expander_size * (depth - 1.1) * mult,
                                            y1);
                }
              else if (depth > 1)
                {
                   gtk_tree_view_draw_line (tree_view, cr,
                                            GTK_TREE_VIEW_TREE_LINE,
-                                           x + tree_view->priv->expander_size * (depth - 1.5) * mult,
+                                           x + expander_size * (depth - 1.5) * mult,
                                            y1,
-                                           x + tree_view->priv->expander_size * (depth - 0.5) * mult,
+                                           x + expander_size * (depth - 0.5) * mult,
                                            y1);
                }
 
@@ -5142,16 +5183,16 @@ gtk_tree_view_bin_draw (GtkWidget      *widget,
                  if (!_gtk_rbtree_next (tree, node))
                     gtk_tree_view_draw_line (tree_view, cr,
                                              GTK_TREE_VIEW_TREE_LINE,
-                                             x + tree_view->priv->expander_size * (depth - 1.5) * mult,
+                                             x + expander_size * (depth - 1.5) * mult,
                                              y0,
-                                             x + tree_view->priv->expander_size * (depth - 1.5) * mult,
+                                             x + expander_size * (depth - 1.5) * mult,
                                              y1);
                  else
                     gtk_tree_view_draw_line (tree_view, cr,
                                              GTK_TREE_VIEW_TREE_LINE,
-                                             x + tree_view->priv->expander_size * (depth - 1.5) * mult,
+                                             x + expander_size * (depth - 1.5) * mult,
                                              y0,
-                                             x + tree_view->priv->expander_size * (depth - 1.5) * mult,
+                                             x + expander_size * (depth - 1.5) * mult,
                                              y2);
 
                  tmp_node = tree->parent_node;
@@ -5162,9 +5203,9 @@ gtk_tree_view_bin_draw (GtkWidget      *widget,
                      if (_gtk_rbtree_next (tmp_tree, tmp_node))
                         gtk_tree_view_draw_line (tree_view, cr,
                                                  GTK_TREE_VIEW_TREE_LINE,
-                                                 x + tree_view->priv->expander_size * (i - 0.5) * mult,
+                                                 x + expander_size * (i - 0.5) * mult,
                                                  y0,
-                                                 x + tree_view->priv->expander_size * (i - 0.5) * mult,
+                                                 x + expander_size * (i - 0.5) * mult,
                                                  y2);
 
                      tmp_node = tmp_tree->parent_node;
@@ -5185,6 +5226,9 @@ gtk_tree_view_bin_draw (GtkWidget      *widget,
          GtkRBTree *tree = NULL;
          GtkRBNode *node = NULL;
 
+          gtk_style_context_save (context);
+          gtk_style_context_add_class (context, GTK_STYLE_CLASS_DND);
+
           switch (tree_view->priv->drag_dest_pos)
             {
             case GTK_TREE_VIEW_DROP_BEFORE:
@@ -5204,12 +5248,10 @@ gtk_tree_view_bin_draw (GtkWidget      *widget,
              if (tree == NULL)
                break;
 
-              gtk_render_focus (context, cr,
-                               0, gtk_tree_view_get_row_y_offset (tree_view, tree, node)
-                                  - focus_line_width / 2,
-                               gdk_window_get_width (tree_view->priv->bin_window),
-                                gtk_tree_view_get_row_height (tree_view, node)
-                                  - focus_line_width + 1);
+              gtk_render_frame (context, cr,
+                                0, gtk_tree_view_get_row_y_offset (tree_view, tree, node),
+                                gdk_window_get_width (tree_view->priv->bin_window),
+                                gtk_tree_view_get_row_height (tree_view, node));
               break;
             }
 
@@ -5222,10 +5264,12 @@ gtk_tree_view_bin_draw (GtkWidget      *widget,
                                        rtl ? 0 : bin_window_width,
                                        highlight_y);
             }
+
+          gtk_style_context_restore (context);
         }
 
       /* draw the big row-spanning focus rectangle, if needed */
-      if (!has_can_focus_cell && node == cursor &&
+      if (!has_can_focus_cell && node == tree_view->priv->cursor_node &&
           tree_view->priv->draw_keyfocus &&
          gtk_widget_has_visible_focus (widget))
         {
@@ -5263,12 +5307,8 @@ gtk_tree_view_bin_draw (GtkWidget      *widget,
          gboolean has_child;
 
          tree = node->children;
-         node = tree->root;
-
-          g_assert (node != tree->nil);
+          node = _gtk_rbtree_first (tree);
 
-         while (node->left != tree->nil)
-           node = node->left;
          has_child = gtk_tree_model_iter_children (tree_view->priv->model,
                                                    &iter,
                                                    &parent);
@@ -5322,9 +5362,6 @@ done:
   if (tree_view->priv->rubber_band_status == RUBBER_BAND_ACTIVE)
     gtk_tree_view_paint_rubber_band (tree_view, cr);
 
-  if (cursor_path)
-    gtk_tree_path_free (cursor_path);
-
   if (drag_dest_path)
     gtk_tree_path_free (drag_dest_path);
 
@@ -5337,24 +5374,23 @@ gtk_tree_view_draw (GtkWidget *widget,
 {
   GtkTreeView *tree_view = GTK_TREE_VIEW (widget);
   GtkWidget   *button;
+  GtkStyleContext *context;
+
+  context = gtk_widget_get_style_context (widget);
+  gtk_render_background (context, cr,
+                         0, 0,
+                         gtk_widget_get_allocated_width (widget),
+                         gtk_widget_get_allocated_height (widget));
 
   if (gtk_cairo_should_draw_window (cr, tree_view->priv->bin_window))
     {
-      GtkStyleContext *context;
       GList *tmp_list;
 
-      context = gtk_widget_get_style_context (widget);
-
       cairo_save (cr);
 
-      gtk_style_context_save (context);
-      gtk_style_context_add_class (context, GTK_STYLE_CLASS_VIEW);
-
       gtk_cairo_transform_to_window (cr, widget, tree_view->priv->bin_window);
-
       gtk_tree_view_bin_draw (widget, cr);
 
-      gtk_style_context_restore (context);
       cairo_restore (cr);
 
       /* We can't just chain up to Container::draw as it will try to send the
@@ -5371,6 +5407,9 @@ gtk_tree_view_draw (GtkWidget *widget,
        }
     }
 
+  gtk_style_context_save (context);
+  gtk_style_context_remove_class (context, GTK_STYLE_CLASS_VIEW);
+
   if (gtk_cairo_should_draw_window (cr, tree_view->priv->header_window))
     {
       GList *list;
@@ -5399,6 +5438,8 @@ gtk_tree_view_draw (GtkWidget *widget,
                                     button, cr);
     }
 
+  gtk_style_context_restore (context);
+
   return FALSE;
 }
 
@@ -5665,7 +5706,7 @@ gtk_tree_view_key_press (GtkWidget   *widget,
            || event->keyval == GDK_KEY_Right || event->keyval == GDK_KEY_KP_Right))
         {
           GtkTreeViewColumn *column = GTK_TREE_VIEW_COLUMN (focus_column->data);
-          gint max_width, min_width;
+          gint column_width;
 
           if (!gtk_tree_view_column_get_resizable (column))
             {
@@ -5673,70 +5714,20 @@ gtk_tree_view_key_press (GtkWidget   *widget,
               return TRUE;
             }
 
+         column_width = gtk_tree_view_column_get_width (column);
+
           if (event->keyval == (rtl ? GDK_KEY_Right : GDK_KEY_Left)
               || event->keyval == (rtl ? GDK_KEY_KP_Right : GDK_KEY_KP_Left))
             {
-             GtkRequisition button_req;
-              gint old_width = _gtk_tree_view_column_get_resized_width (column);
-             gint new_width;
-
-             button = gtk_tree_view_column_get_button (column);
-
-             gtk_widget_get_preferred_size (button, &button_req, NULL);
-
-              new_width = MAX (old_width, gtk_tree_view_column_get_width (column));
-              new_width -= 2;
-              if (new_width < 0)
-                new_width = 0;
-
-             _gtk_tree_view_column_set_resized_width (column, new_width);
-
-              min_width = gtk_tree_view_column_get_min_width (column);
-              if (min_width == -1)
-                new_width = MAX (button_req.width, new_width);
-              else
-                {
-                  new_width = MAX (min_width, new_width);
-                }
-
-              max_width = gtk_tree_view_column_get_max_width (column);
-              if (max_width != -1)
-                new_width = MIN (new_width, max_width);
-
-             _gtk_tree_view_column_set_use_resized_width (column, TRUE);
-
-              if (new_width != old_width)
-               {
-                 _gtk_tree_view_column_set_resized_width (column, new_width);
-                 gtk_widget_queue_resize (widget);
-               }
-              else
-                gtk_widget_error_bell (widget);
+             column_width = MAX (column_width - 2, 0);
             }
           else if (event->keyval == (rtl ? GDK_KEY_Left : GDK_KEY_Right)
                    || event->keyval == (rtl ? GDK_KEY_KP_Left : GDK_KEY_KP_Right))
             {
-              gint old_width = _gtk_tree_view_column_get_resized_width (column);
-             gint new_width;
-
-              new_width = MAX (old_width, gtk_tree_view_column_get_width (column));
-              new_width += 2;
-
-              max_width = gtk_tree_view_column_get_max_width (column);
-              if (max_width != -1)
-                new_width = MIN (new_width, max_width);
-
-             _gtk_tree_view_column_set_use_resized_width (column, TRUE);
-
-              if (new_width != old_width)
-               {
-                 _gtk_tree_view_column_set_resized_width (column, new_width);
-                 gtk_widget_queue_resize (widget);
-               }
-              else
-                gtk_widget_error_bell (widget);
+             column_width = column_width + 2;
             }
 
+         gtk_tree_view_modify_column_width (tree_view, column, column_width);
           return TRUE;
         }
 
@@ -5932,7 +5923,9 @@ gtk_tree_view_leave_notify (GtkWidget        *widget,
 {
   GtkTreeView *tree_view;
 
-  if (event->mode == GDK_CROSSING_GRAB)
+  if (event->mode == GDK_CROSSING_GRAB ||
+      event->mode == GDK_CROSSING_GTK_GRAB ||
+      event->mode == GDK_CROSSING_GTK_UNGRAB)
     return TRUE;
 
   tree_view = GTK_TREE_VIEW (widget);
@@ -6036,6 +6029,7 @@ validate_row (GtkTreeView *tree_view,
   gint grid_line_width;
   gboolean wide_separators;
   gint separator_height;
+  gint expander_size;
 
   /* double check the row needs validating */
   if (! GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_INVALID) &&
@@ -6059,6 +6053,7 @@ validate_row (GtkTreeView *tree_view,
   draw_hgrid_lines =
     tree_view->priv->grid_lines == GTK_TREE_VIEW_GRID_LINES_HORIZONTAL
     || tree_view->priv->grid_lines == GTK_TREE_VIEW_GRID_LINES_BOTH;
+  expander_size = gtk_tree_view_get_expander_size (tree_view);
 
   for (last_column = g_list_last (tree_view->priv->columns);
        last_column &&
@@ -6101,7 +6096,7 @@ validate_row (GtkTreeView *tree_view,
        {
           row_height += vertical_separator;
          height = MAX (height, row_height);
-         height = MAX (height, tree_view->priv->expander_size);
+         height = MAX (height, expander_size);
        }
       else
         {
@@ -6116,7 +6111,7 @@ validate_row (GtkTreeView *tree_view,
          padding += horizontal_separator + (depth - 1) * tree_view->priv->level_indentation;
 
          if (gtk_tree_view_draw_expanders (tree_view))
-           padding += depth * tree_view->priv->expander_size;
+           padding += depth * expander_size;
        }
       else
        padding += horizontal_separator;
@@ -6146,7 +6141,6 @@ validate_row (GtkTreeView *tree_view,
       _gtk_rbtree_node_set_height (tree, node, height);
     }
   _gtk_rbtree_node_mark_valid (tree, node);
-  tree_view->priv->post_validation_flag = TRUE;
 
   return retval;
 }
@@ -6296,7 +6290,7 @@ validate_visible_area (GtkTreeView *tree_view)
        }
       else
        {
-         path = _gtk_tree_view_find_path (tree_view, tree, node);
+         path = _gtk_tree_path_new_from_rbtree (tree, node);
          total_height += offset;
        }
 
@@ -6334,7 +6328,7 @@ validate_visible_area (GtkTreeView *tree_view)
          GtkTreePath *tmppath;
          GtkTreeIter tmpiter;
 
-         tmppath = _gtk_tree_view_find_path (tree_view, tmptree, tmpnode);
+         tmppath = _gtk_tree_path_new_from_rbtree (tmptree, tmpnode);
          gtk_tree_model_get_iter (tree_view->priv->model, &tmpiter, tmppath);
 
          if (GTK_RBNODE_FLAG_SET (tmpnode, GTK_RBNODE_INVALID) ||
@@ -6362,12 +6356,8 @@ validate_visible_area (GtkTreeView *tree_view)
          gboolean has_child;
 
          tree = node->children;
-         node = tree->root;
-
-          g_assert (node != tree->nil);
+          node = _gtk_rbtree_first (tree);
 
-         while (node->left != tree->nil)
-           node = node->left;
          has_child = gtk_tree_model_iter_children (tree_view->priv->model,
                                                    &iter,
                                                    &parent);
@@ -6450,7 +6440,7 @@ validate_visible_area (GtkTreeView *tree_view)
        break;
 
       gtk_tree_path_free (above_path);
-      above_path = _gtk_tree_view_find_path (tree_view, tree, node);
+      above_path = _gtk_tree_path_new_from_rbtree (tree, node);
 
       gtk_tree_model_get_iter (tree_view->priv->model, &iter, above_path);
 
@@ -6542,7 +6532,7 @@ initialize_fixed_height_mode (GtkTreeView *tree_view)
       tree = tree_view->priv->tree;
       node = tree->root;
 
-      path = _gtk_tree_view_find_path (tree_view, tree, node);
+      path = _gtk_tree_path_new_from_rbtree (tree, node);
       gtk_tree_model_get_iter (tree_view->priv->model, &iter, path);
 
       validate_row (tree_view, tree, node, &iter, path);
@@ -6565,6 +6555,8 @@ initialize_fixed_height_mode (GtkTreeView *tree_view)
 static gboolean
 do_validate_rows (GtkTreeView *tree_view, gboolean queue_resize)
 {
+  static gboolean prevent_recursion_hack = FALSE;
+
   GtkRBTree *tree = NULL;
   GtkRBNode *node = NULL;
   gboolean validated_area = FALSE;
@@ -6580,6 +6572,10 @@ do_validate_rows (GtkTreeView *tree_view, gboolean queue_resize)
 
   g_assert (tree_view);
 
+  /* prevent infinite recursion via get_preferred_width() */
+  if (prevent_recursion_hack)
+    return FALSE;
+
   if (tree_view->priv->tree == NULL)
       return FALSE;
 
@@ -6628,12 +6624,12 @@ do_validate_rows (GtkTreeView *tree_view, gboolean queue_resize)
 
          do
            {
-             if (node->left != tree->nil &&
+             if (!_gtk_rbtree_is_nil (node->left) &&
                  GTK_RBNODE_FLAG_SET (node->left, GTK_RBNODE_DESCENDANTS_INVALID))
                {
                  node = node->left;
                }
-             else if (node->right != tree->nil &&
+              else if (!_gtk_rbtree_is_nil (node->right) &&
                       GTK_RBNODE_FLAG_SET (node->right, GTK_RBNODE_DESCENDANTS_INVALID))
                {
                  node = node->right;
@@ -6653,7 +6649,7 @@ do_validate_rows (GtkTreeView *tree_view, gboolean queue_resize)
                g_assert_not_reached ();
            }
          while (TRUE);
-         path = _gtk_tree_view_find_path (tree_view, tree, node);
+         path = _gtk_tree_path_new_from_rbtree (tree, node);
          gtk_tree_model_get_iter (tree_view->priv->model, &iter, path);
        }
 
@@ -6710,7 +6706,10 @@ do_validate_rows (GtkTreeView *tree_view, gboolean queue_resize)
        * Currently bypassing this but the real solution is to not update the scroll adjustments
        * untill we've recieved an allocation (never update scroll adjustments from size-requests).
        */
-      gtk_tree_view_size_request (GTK_WIDGET (tree_view), &requisition, FALSE);
+      prevent_recursion_hack = TRUE;
+      gtk_tree_view_get_preferred_width (GTK_WIDGET (tree_view), &requisition.width, NULL);
+      gtk_tree_view_get_preferred_height (GTK_WIDGET (tree_view), &requisition.height, NULL);
+      prevent_recursion_hack = FALSE;
 
       /* If rows above the current position have changed height, this has
        * affected the current view and thus needs a redraw.
@@ -6819,21 +6818,6 @@ install_presize_handler (GtkTreeView *tree_view)
     }
 }
 
-static void
-gtk_tree_view_bin_process_updates (GtkTreeView *tree_view)
-{
-  /* Prior to drawing, we make sure the visible area is validated. */
-  if (tree_view->priv->presize_handler_timer)
-    {
-      g_source_remove (tree_view->priv->presize_handler_timer);
-      tree_view->priv->presize_handler_timer = 0;
-
-      do_presize_handler (tree_view);
-    }
-
-  gdk_window_process_updates (tree_view->priv->bin_window, TRUE);
-}
-
 static gboolean
 scroll_sync_handler (GtkTreeView *tree_view)
 {
@@ -6908,7 +6892,7 @@ gtk_tree_view_dy_to_top_row (GtkTreeView *tree_view)
        }
       else
         {
-         path = _gtk_tree_view_find_path (tree_view, tree, node);
+         path = _gtk_tree_path_new_from_rbtree (tree, node);
          gtk_tree_view_set_top_row (tree_view, path, offset);
          gtk_tree_path_free (path);
        }
@@ -7175,7 +7159,7 @@ drag_scan_timeout (gpointer data)
   GtkTreeViewColumn *column = NULL;
   GdkRectangle visible_rect;
 
-  GDK_THREADS_ENTER ();
+  gdk_threads_enter ();
 
   tree_view = GTK_TREE_VIEW (data);
 
@@ -7213,7 +7197,7 @@ drag_scan_timeout (gpointer data)
         }
     }
 
-  GDK_THREADS_LEAVE ();
+  gdk_threads_leave ();
 
   return TRUE;
 }
@@ -7606,7 +7590,14 @@ gtk_tree_view_drag_begin (GtkWidget      *widget,
                                  &cell_x,
                                  &cell_y);
 
-  g_return_if_fail (path != NULL);
+  /* If path is NULL, there's nothing we can drag.  For now, we silently
+   * bail out.  Actually, dragging should not be possible from an empty
+   * tree view, but there's no way we can cancel that from here.
+   * Automatically unsetting the tree view as drag source for empty models
+   * is something that would likely break other people's code ...
+   */
+  if (!path)
+    return;
 
   row_pix = gtk_tree_view_create_row_drag_icon (tree_view,
                                                 path);
@@ -7974,8 +7965,9 @@ gtk_tree_view_drag_data_received (GtkWidget        *widget,
                    (gdk_drag_context_get_selected_action (context) == GDK_ACTION_MOVE),
                    time);
 
-  if (gtk_tree_path_get_depth (dest_row) == 1
-      && gtk_tree_path_get_indices (dest_row)[0] == 0)
+  if (gtk_tree_path_get_depth (dest_row) == 1 &&
+      gtk_tree_path_get_indices (dest_row)[0] == 0 &&
+      gtk_tree_model_iter_n_children (tree_view->priv->model, NULL) != 0)
     {
       /* special special case drag to "0", scroll to first item */
       if (!tree_view->priv->scroll_to_path)
@@ -8133,9 +8125,6 @@ gtk_tree_view_set_fixed_height_mode (GtkTreeView *tree_view,
     {
       tree_view->priv->fixed_height_mode = 0;
       tree_view->priv->fixed_height = -1;
-
-      /* force a revalidation */
-      install_presize_handler (tree_view);
     }
   else 
     {
@@ -8154,11 +8143,11 @@ gtk_tree_view_set_fixed_height_mode (GtkTreeView *tree_view,
       
       tree_view->priv->fixed_height_mode = 1;
       tree_view->priv->fixed_height = -1;
-      
-      if (tree_view->priv->tree)
-       initialize_fixed_height_mode (tree_view);
     }
 
+  /* force a revalidation */
+  install_presize_handler (tree_view);
+
   g_object_notify (G_OBJECT (tree_view), "fixed-height-mode");
 }
 
@@ -8330,7 +8319,7 @@ gtk_tree_view_header_focus (GtkTreeView      *tree_view,
       for (tmp_list = tree_view->priv->columns; tmp_list; tmp_list = tmp_list->next)
        if (gtk_tree_view_column_get_button (GTK_TREE_VIEW_COLUMN (tmp_list->data)) == focus_child)
          {
-           tree_view->priv->focus_column = GTK_TREE_VIEW_COLUMN (tmp_list->data);
+            _gtk_tree_view_set_focus_column (tree_view, GTK_TREE_VIEW_COLUMN (tmp_list->data));
            break;
          }
 
@@ -8377,7 +8366,7 @@ search_first_focusable_path (GtkTreeView  *tree_view,
        gtk_tree_path_free (*path);
 
       if (node)
-       *path = _gtk_tree_view_find_path (tree_view, tree, node);
+       *path = _gtk_tree_path_new_from_rbtree (tree, node);
       else
        *path = NULL;
     }
@@ -8459,41 +8448,32 @@ gtk_tree_view_style_updated (GtkWidget *widget)
   GtkTreeView *tree_view = GTK_TREE_VIEW (widget);
   GList *list;
   GtkTreeViewColumn *column;
+  GtkStyleContext *style_context;
+  const GtkBitmask *changes;
 
   GTK_WIDGET_CLASS (gtk_tree_view_parent_class)->style_updated (widget);
 
   if (gtk_widget_get_realized (widget))
     {
-      GtkStyleContext *context;
-
-      context = gtk_widget_get_style_context (widget);
-
-      gtk_style_context_save (context);
-      gtk_style_context_add_class (context, GTK_STYLE_CLASS_VIEW);
-      gtk_style_context_set_background (context, tree_view->priv->bin_window);
-      gtk_style_context_restore (context);
-
-      gtk_style_context_set_background (context, tree_view->priv->header_window);
+      gtk_tree_view_ensure_background (tree_view);
 
       gtk_tree_view_set_grid_lines (tree_view, tree_view->priv->grid_lines);
       gtk_tree_view_set_enable_tree_lines (tree_view, tree_view->priv->tree_lines_enabled);
     }
 
-  gtk_widget_style_get (widget,
-                       "expander-size", &tree_view->priv->expander_size,
-                       NULL);
-  tree_view->priv->expander_size += EXPANDER_EXTRA_PADDING;
-
-  for (list = tree_view->priv->columns; list; list = list->next)
+  style_context = gtk_widget_get_style_context (widget);
+  changes = _gtk_style_context_get_changes (style_context);
+  if (changes == NULL || _gtk_css_style_property_changes_affect_size (changes))
     {
-      column = list->data;
-      _gtk_tree_view_column_cell_set_dirty (column, TRUE);
-    }
-
-  tree_view->priv->fixed_height = -1;
-  _gtk_rbtree_mark_invalid (tree_view->priv->tree);
+      for (list = tree_view->priv->columns; list; list = list->next)
+       {
+         column = list->data;
+         _gtk_tree_view_column_cell_set_dirty (column, TRUE);
+       }
 
-  gtk_widget_queue_resize (widget);
+      tree_view->priv->fixed_height = -1;
+      _gtk_rbtree_mark_invalid (tree_view->priv->tree);
+    }
 }
 
 
@@ -8508,7 +8488,7 @@ gtk_tree_view_set_focus_child (GtkContainer *container,
     {
       if (gtk_tree_view_column_get_button (GTK_TREE_VIEW_COLUMN (list->data)) == child)
        {
-         tree_view->priv->focus_column = GTK_TREE_VIEW_COLUMN (list->data);
+          _gtk_tree_view_set_focus_column (tree_view, GTK_TREE_VIEW_COLUMN (list->data));
          break;
        }
     }
@@ -8523,21 +8503,27 @@ gtk_tree_view_get_path_for_child (GtkContainer *container,
   GtkTreeView *tree_view = GTK_TREE_VIEW (container);
   GtkWidgetPath *path;
   gboolean rtl;
-  GList *list;
+  GList *list, *visible_columns = NULL;
   gint n_col = 0;
 
   path = GTK_CONTAINER_CLASS (gtk_tree_view_parent_class)->get_path_for_child (container, child);
   rtl = (gtk_widget_get_direction (GTK_WIDGET (container)) == GTK_TEXT_DIR_RTL);
 
-  for (list = (rtl ? g_list_last (tree_view->priv->columns) : g_list_first (tree_view->priv->columns));
-       list;
-       list = (rtl ? list->prev : list->next))
+  for (list = tree_view->priv->columns; list; list = list->next)
     {
       GtkTreeViewColumn *column = list->data;
-      GtkRegionFlags flags = 0;
 
-      if (!gtk_tree_view_column_get_visible (column))
-        continue;
+      if (gtk_tree_view_column_get_visible (column))
+        visible_columns = g_list_prepend (visible_columns, column);
+    }
+
+  if (!rtl)
+    visible_columns = g_list_reverse (visible_columns);
+
+  for (list = visible_columns; list != NULL; list = list->next)
+    {
+      GtkTreeViewColumn *column = list->data;
+      GtkRegionFlags flags = 0;
 
       n_col++;
 
@@ -8553,15 +8539,13 @@ gtk_tree_view_get_path_for_child (GtkContainer *container,
       if (n_col == 1)
         flags |= GTK_REGION_FIRST;
 
-      if ((rtl && !list->prev) ||
-          (!rtl && !list->next))
+      if (!list->next)
         flags |= GTK_REGION_LAST;
 
-      gtk_widget_path_iter_add_region (path, -1, GTK_STYLE_REGION_COLUMN_HEADER, flags);
+      gtk_widget_path_iter_add_region (path, gtk_widget_path_length (path) - 2, GTK_STYLE_REGION_COLUMN_HEADER, flags);
       break;
     }
-
-  gtk_widget_path_append_for_widget (path, child);
+  g_list_free (visible_columns);
 
   return path;
 }
@@ -8720,8 +8704,9 @@ gtk_tree_view_row_changed (GtkTreeModel *model,
 
   g_return_if_fail (path != NULL || iter != NULL);
 
-  if (tree_view->priv->cursor != NULL)
-    cursor_path = gtk_tree_row_reference_get_path (tree_view->priv->cursor);
+  if (tree_view->priv->cursor_node != NULL)
+    cursor_path = _gtk_tree_path_new_from_rbtree (tree_view->priv->cursor_tree,
+                                                  tree_view->priv->cursor_node);
   else
     cursor_path = NULL;
 
@@ -8750,6 +8735,8 @@ gtk_tree_view_row_changed (GtkTreeModel *model,
   if (tree == NULL)
     goto done;
 
+  _gtk_tree_view_accessible_changed (tree_view, tree, node);
+
   if (tree_view->priv->fixed_height_mode
       && tree_view->priv->fixed_height >= 0)
     {
@@ -8849,9 +8836,7 @@ gtk_tree_view_row_inserted (GtkTreeModel *model,
          /* In theory, the model should have emitted has_child_toggled here.  We
           * try to catch it anyway, just to be safe, in case the model hasn't.
           */
-         GtkTreePath *tmppath = _gtk_tree_view_find_path (tree_view,
-                                                          tree,
-                                                          tmpnode);
+         GtkTreePath *tmppath = _gtk_tree_path_new_from_rbtree (tree, tmpnode);
          gtk_tree_view_row_has_child_toggled (model, tmppath, NULL, data);
          gtk_tree_path_free (tmppath);
           goto done;
@@ -8880,6 +8865,8 @@ gtk_tree_view_row_inserted (GtkTreeModel *model,
       tmpnode = _gtk_rbtree_insert_after (tree, tmpnode, height, FALSE);
     }
 
+  _gtk_tree_view_accessible_add (tree_view, tree, tmpnode);
+
  done:
   if (height > 0)
     {
@@ -8940,9 +8927,15 @@ gtk_tree_view_row_has_child_toggled (GtkTreeModel *model,
     goto done;
 
   if (has_child)
-    GTK_RBNODE_SET_FLAG (node, GTK_RBNODE_IS_PARENT);
+    {
+      GTK_RBNODE_SET_FLAG (node, GTK_RBNODE_IS_PARENT);
+      _gtk_tree_view_accessible_add_state (tree_view, tree, node, GTK_CELL_RENDERER_EXPANDABLE);
+    }
   else
-    GTK_RBNODE_UNSET_FLAG (node, GTK_RBNODE_IS_PARENT);
+    {
+      GTK_RBNODE_UNSET_FLAG (node, GTK_RBNODE_IS_PARENT);
+      _gtk_tree_view_accessible_remove_state (tree_view, tree, node, GTK_CELL_RENDERER_EXPANDABLE);
+    }
 
   if (has_child && tree_view->priv->is_list)
     {
@@ -8987,7 +8980,7 @@ check_selection_helper (GtkRBTree *tree,
 {
   gint *value = (gint *)data;
 
-  *value = GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED);
+  *value |= GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED);
 
   if (node->children && !*value)
     _gtk_rbtree_traverse (node->children, node->children->root, G_POST_ORDER, check_selection_helper, data);
@@ -9002,8 +8995,9 @@ gtk_tree_view_row_deleted (GtkTreeModel *model,
   GtkRBTree *tree;
   GtkRBNode *node;
   GList *list;
-  gint selection_changed = FALSE;
-  GtkStyleContext *context;
+  gboolean selection_changed = FALSE, cursor_changed = FALSE;
+  GtkRBTree *cursor_tree = NULL;
+  GtkRBNode *cursor_node = NULL;
 
   g_return_if_fail (path != NULL);
 
@@ -9030,6 +9024,53 @@ gtk_tree_view_row_deleted (GtkTreeModel *model,
   /* Cancel editting if we've started */
   gtk_tree_view_stop_editing (tree_view, TRUE);
 
+  /* If the cursor row got deleted, move the cursor to the next row */
+  if (tree_view->priv->cursor_node &&
+      (tree_view->priv->cursor_node == node ||
+       (node->children && (tree_view->priv->cursor_tree == node->children ||
+                           _gtk_rbtree_contains (node->children, tree_view->priv->cursor_tree)))))
+    {
+      GtkTreePath *cursor_path;
+
+      cursor_tree = tree;
+      cursor_node = _gtk_rbtree_next (tree, node);
+      /* find the first node that is not going to be deleted */
+      while (cursor_node == NULL && cursor_tree->parent_tree)
+        {
+          cursor_node = _gtk_rbtree_next (cursor_tree->parent_tree,
+                                          cursor_tree->parent_node);
+          cursor_tree = cursor_tree->parent_tree;
+        }
+
+      if (cursor_node != NULL)
+        cursor_path = _gtk_tree_path_new_from_rbtree (cursor_tree, cursor_node);
+      else
+        cursor_path = NULL;
+
+      if (cursor_path == NULL ||
+          ! search_first_focusable_path (tree_view, &cursor_path, TRUE, 
+                                         &cursor_tree, &cursor_node))
+        {
+          /* It looks like we reached the end of the view without finding
+           * a focusable row.  We will step backwards to find the last
+           * focusable row.
+           */
+          _gtk_rbtree_prev_full (tree, node, &cursor_tree, &cursor_node);
+          if (cursor_node)
+            {
+              cursor_path = _gtk_tree_path_new_from_rbtree (cursor_tree, cursor_node);
+              if (! search_first_focusable_path (tree_view, &cursor_path, FALSE,
+                                                 &cursor_tree, &cursor_node))
+                cursor_node = NULL;
+              gtk_tree_path_free (cursor_path);
+            }
+        }
+      else if (cursor_path)
+        gtk_tree_path_free (cursor_path);
+
+      cursor_changed = TRUE;
+    }
+
   if (tree_view->priv->destroy_count_func)
     {
       gint child_count = 0;
@@ -9043,6 +9084,9 @@ gtk_tree_view_row_deleted (GtkTreeModel *model,
       if (tree_view->priv->tree == tree)
        tree_view->priv->tree = NULL;
 
+      _gtk_tree_view_accessible_remove_state (tree_view,
+                                              tree->parent_tree, tree->parent_node,
+                                              GTK_CELL_RENDERER_EXPANDED);
       _gtk_tree_view_accessible_remove (tree_view, tree, NULL);
       _gtk_rbtree_remove (tree);
     }
@@ -9058,14 +9102,21 @@ gtk_tree_view_row_deleted (GtkTreeModel *model,
       tree_view->priv->top_row = NULL;
     }
 
-  /* Cancel any ongoing animation happening within the row */
-  context = gtk_widget_get_style_context (GTK_WIDGET (tree_view));
-  gtk_style_context_cancel_animations (context, node);
-
   install_scroll_sync_handler (tree_view);
 
   gtk_widget_queue_resize (GTK_WIDGET (tree_view));
 
+  if (cursor_changed)
+    {
+      if (cursor_node)
+        {
+          GtkTreePath *cursor_path = _gtk_tree_path_new_from_rbtree (cursor_tree, cursor_node);
+          gtk_tree_view_real_set_cursor (tree_view, cursor_path, CLEAR_AND_SELECT | CURSOR_INVALID);
+          gtk_tree_path_free (cursor_path);
+        }
+      else
+        gtk_tree_view_real_set_cursor (tree_view, NULL, CLEAR_AND_SELECT | CURSOR_INVALID);
+    }
   if (selection_changed)
     g_signal_emit_by_name (tree_view->priv->selection, "changed");
 }
@@ -9115,6 +9166,8 @@ gtk_tree_view_rows_reordered (GtkTreeModel *model,
 
   _gtk_rbtree_reorder (tree, new_order, len);
 
+  _gtk_tree_view_accessible_reorder (tree_view);
+
   gtk_widget_queue_draw (GTK_WIDGET (tree_view));
 
   gtk_tree_view_dy_to_top_row (tree_view);
@@ -9187,10 +9240,19 @@ gtk_tree_view_get_arrow_xrange (GtkTreeView *tree_view,
   GList *list;
   GtkTreeViewColumn *tmp_column = NULL;
   gint total_width;
+  gint expander_size, expander_render_size;
+  gint horizontal_separator;
   gboolean indent_expanders;
   gboolean rtl;
 
+  gtk_widget_style_get (GTK_WIDGET (tree_view),
+                       "indent-expanders", &indent_expanders,
+                        "horizontal-separator", &horizontal_separator,
+                       NULL);
+
   rtl = (gtk_widget_get_direction (GTK_WIDGET (tree_view)) == GTK_TEXT_DIR_RTL);
+  expander_size = gtk_tree_view_get_expander_size (tree_view);
+  expander_render_size = expander_size - (horizontal_separator / 2);
 
   total_width = 0;
   for (list = (rtl ? g_list_last (tree_view->priv->columns) : g_list_first (tree_view->priv->columns));
@@ -9202,7 +9264,7 @@ gtk_tree_view_get_arrow_xrange (GtkTreeView *tree_view,
       if (gtk_tree_view_is_expander_column (tree_view, tmp_column))
         {
          if (rtl)
-           x_offset = total_width + gtk_tree_view_column_get_width (tmp_column) - tree_view->priv->expander_size;
+           x_offset = total_width + gtk_tree_view_column_get_width (tmp_column) - expander_size;
          else
            x_offset = total_width;
           break;
@@ -9212,16 +9274,14 @@ gtk_tree_view_get_arrow_xrange (GtkTreeView *tree_view,
         total_width += gtk_tree_view_column_get_width (tmp_column);
     }
 
-  gtk_widget_style_get (GTK_WIDGET (tree_view),
-                       "indent-expanders", &indent_expanders,
-                       NULL);
+  x_offset += (expander_size - expander_render_size);
 
   if (indent_expanders)
     {
       if (rtl)
-       x_offset -= tree_view->priv->expander_size * _gtk_rbtree_get_depth (tree);
+       x_offset -= expander_size * _gtk_rbtree_get_depth (tree);
       else
-       x_offset += tree_view->priv->expander_size * _gtk_rbtree_get_depth (tree);
+       x_offset += expander_size * _gtk_rbtree_get_depth (tree);
     }
 
   *x1 = x_offset;
@@ -9229,7 +9289,7 @@ gtk_tree_view_get_arrow_xrange (GtkTreeView *tree_view,
   if (tmp_column &&
       gtk_tree_view_column_get_visible (tmp_column))
     /* +1 because x2 isn't included in the range. */
-    *x2 = *x1 + tree_view->priv->expander_size + 1;
+    *x2 = *x1 + expander_render_size + 1;
   else
     *x2 = *x1;
 }
@@ -9320,13 +9380,9 @@ gtk_tree_view_clamp_node_visible (GtkTreeView *tree_view,
                               + gtk_adjustment_get_page_size (tree_view->priv->vadjustment)))
     return;
 
-  path = _gtk_tree_view_find_path (tree_view, tree, node);
+  path = _gtk_tree_path_new_from_rbtree (tree, node);
   if (path)
     {
-      /* We process updates because we want to clear old selected items when we scroll.
-       * if this is removed, we get a "selection streak" at the bottom. */
-      gtk_tree_view_bin_process_updates (tree_view);
-
       gtk_tree_view_scroll_to_cell (tree_view, path, NULL, FALSE, 0.0, 0.0);
       gtk_tree_path_free (path);
     }
@@ -9396,9 +9452,8 @@ gtk_tree_view_clamp_column_visible (GtkTreeView       *tree_view,
 /* This function could be more efficient.  I'll optimize it if profiling seems
  * to imply that it is important */
 GtkTreePath *
-_gtk_tree_view_find_path (GtkTreeView *tree_view,
-                         GtkRBTree   *tree,
-                         GtkRBNode   *node)
+_gtk_tree_path_new_from_rbtree (GtkRBTree   *tree,
+                               GtkRBNode   *node)
 {
   GtkTreePath *path;
   GtkRBTree *tmp_tree;
@@ -9408,7 +9463,6 @@ _gtk_tree_view_find_path (GtkTreeView *tree_view,
   path = gtk_tree_path_new ();
 
   g_return_val_if_fail (node != NULL, path);
-  g_return_val_if_fail (node != tree->nil, path);
 
   count = 1 + node->left->count;
 
@@ -9417,7 +9471,7 @@ _gtk_tree_view_find_path (GtkTreeView *tree_view,
   tmp_tree = tree;
   while (tmp_tree)
     {
-      while (tmp_node != tmp_tree->nil)
+      while (!_gtk_rbtree_is_nil (tmp_node))
        {
          if (tmp_node->right == last)
            count += 1 + tmp_node->left->count;
@@ -9571,15 +9625,12 @@ gtk_tree_view_unref_tree_helper (GtkTreeModel *model,
          GtkRBNode *new_node;
 
          new_tree = node->children;
-         new_node = new_tree->root;
-
-         while (new_node && new_node->left != new_tree->nil)
-           new_node = new_node->left;
+          new_node = _gtk_rbtree_first (new_tree);
 
          if (!gtk_tree_model_iter_children (model, &child, iter))
            return FALSE;
 
-         retval = retval || gtk_tree_view_unref_tree_helper (model, &child, new_tree, new_node);
+         retval = gtk_tree_view_unref_tree_helper (model, &child, new_tree, new_node) | retval;
        }
 
       if (GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
@@ -9604,12 +9655,10 @@ gtk_tree_view_unref_and_check_selection_tree (GtkTreeView *tree_view,
   if (!tree)
     return FALSE;
 
-  node = tree->root;
-  while (node && node->left != tree->nil)
-    node = node->left;
+  node = _gtk_rbtree_first (tree);
 
   g_return_val_if_fail (node != NULL, FALSE);
-  path = _gtk_tree_view_find_path (tree_view, tree, node);
+  path = _gtk_tree_path_new_from_rbtree (tree, node);
   gtk_tree_model_get_iter (GTK_TREE_MODEL (tree_view->priv->model),
                           &iter, path);
   retval = gtk_tree_view_unref_tree_helper (GTK_TREE_MODEL (tree_view->priv->model), &iter, tree, node);
@@ -9736,9 +9785,13 @@ _gtk_tree_view_column_start_drag (GtkTreeView       *tree_view,
   GdkScreen *screen = gtk_widget_get_screen (GTK_WIDGET (tree_view));
   GtkWidget *button;
   GdkDevice *pointer, *keyboard;
+  GdkWindowAttr attributes;
+  guint attributes_mask;
+  GtkStyleContext *context;
 
   g_return_if_fail (tree_view->priv->column_drag_info == NULL);
   g_return_if_fail (tree_view->priv->cur_reorder == NULL);
+  g_return_if_fail (tree_view->priv->drag_window == NULL);
 
   gtk_tree_view_set_column_drag_info (tree_view, column);
 
@@ -9747,28 +9800,25 @@ _gtk_tree_view_column_start_drag (GtkTreeView       *tree_view,
 
   button = gtk_tree_view_column_get_button (column);
 
-  if (tree_view->priv->drag_window == NULL)
-    {
-      GdkWindowAttr attributes;
-      guint attributes_mask;
+  context = gtk_widget_get_style_context (button);
+  gtk_style_context_add_class (context, GTK_STYLE_CLASS_DND);
 
-      gtk_widget_get_allocation (button, &button_allocation);
+  gtk_widget_get_allocation (button, &button_allocation);
 
-      attributes.window_type = GDK_WINDOW_CHILD;
-      attributes.wclass = GDK_INPUT_OUTPUT;
-      attributes.x = button_allocation.x;
-      attributes.y = 0;
-      attributes.width = button_allocation.width;
-      attributes.height = button_allocation.height;
-      attributes.visual = gtk_widget_get_visual (GTK_WIDGET (tree_view));
-      attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK | GDK_EXPOSURE_MASK | GDK_POINTER_MOTION_MASK;
-      attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
+  attributes.window_type = GDK_WINDOW_CHILD;
+  attributes.wclass = GDK_INPUT_OUTPUT;
+  attributes.x = button_allocation.x;
+  attributes.y = 0;
+  attributes.width = button_allocation.width;
+  attributes.height = button_allocation.height;
+  attributes.visual = gtk_widget_get_visual (GTK_WIDGET (tree_view));
+  attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK | GDK_EXPOSURE_MASK | GDK_POINTER_MOTION_MASK;
+  attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
 
-      tree_view->priv->drag_window = gdk_window_new (tree_view->priv->bin_window,
-                                                     &attributes,
-                                                     attributes_mask);
-      gdk_window_set_user_data (tree_view->priv->drag_window, GTK_WIDGET (tree_view));
-    }
+  tree_view->priv->drag_window = gdk_window_new (tree_view->priv->header_window,
+                                                 &attributes,
+                                                 attributes_mask);
+  gtk_widget_register_window (GTK_WIDGET (tree_view), tree_view->priv->drag_window);
 
   if (gdk_device_get_source (device) == GDK_SOURCE_KEYBOARD)
     {
@@ -9805,7 +9855,7 @@ _gtk_tree_view_column_start_drag (GtkTreeView       *tree_view,
   send_event->button.y = -1;
   send_event->button.axes = NULL;
   send_event->button.state = 0;
-  send_event->button.button = 1;
+  send_event->button.button = GDK_BUTTON_PRIMARY;
   send_event->button.x_root = 0;
   send_event->button.y_root = 0;
   gdk_event_set_device (send_event, device);
@@ -9865,7 +9915,8 @@ gtk_tree_view_queue_draw_arrow (GtkTreeView        *tree_view,
 
   gtk_widget_get_allocation (GTK_WIDGET (tree_view), &allocation);
   rect.x = 0;
-  rect.width = MAX (tree_view->priv->expander_size, MAX (tree_view->priv->width, allocation.width));
+  rect.width = gtk_tree_view_get_expander_size (tree_view);
+  rect.width = MAX (rect.width, MAX (tree_view->priv->width, allocation.width));
 
   rect.y = gtk_tree_view_get_row_y_offset (tree_view, tree, node);
   rect.height = gtk_tree_view_get_row_height (tree_view, node);
@@ -9961,17 +10012,50 @@ _gtk_tree_view_get_rbtree (GtkTreeView *tree_view)
   return tree_view->priv->tree;
 }
 
+gboolean
+_gtk_tree_view_get_cursor_node (GtkTreeView  *tree_view,
+                                GtkRBTree   **tree,
+                                GtkRBNode   **node)
+{
+  GtkTreeViewPrivate *priv;
+
+  priv = tree_view->priv;
+
+  if (priv->cursor_node == NULL)
+    return FALSE;
+
+  *tree = priv->cursor_tree;
+  *node = priv->cursor_node;
+
+  return TRUE;
+}
+
 GdkWindow *
 _gtk_tree_view_get_header_window (GtkTreeView *tree_view)
 {
   return tree_view->priv->header_window;
 }
 
+GtkTreeViewColumn *
+_gtk_tree_view_get_focus_column (GtkTreeView *tree_view)
+{
+  return tree_view->priv->focus_column;
+}
+
 void
 _gtk_tree_view_set_focus_column (GtkTreeView       *tree_view,
                                 GtkTreeViewColumn *column)
 {
+  GtkTreeViewColumn *old_column = tree_view->priv->focus_column;
+
+  if (old_column == column)
+    return;
+
   tree_view->priv->focus_column = column;
+
+  _gtk_tree_view_accessible_update_focus_column (tree_view, 
+                                                 old_column,
+                                                 column);
 }
 
 
@@ -10004,16 +10088,14 @@ gtk_tree_view_draw_arrow (GtkTreeView *tree_view,
   gint x_offset = 0;
   gint x2;
   gint vertical_separator;
-  gint expander_size;
-  GtkCellRendererState flags;
+  GtkCellRendererState flags = 0;
 
   widget = GTK_WIDGET (tree_view);
   context = gtk_widget_get_style_context (widget);
 
   gtk_widget_style_get (widget,
-                       "vertical-separator", &vertical_separator,
-                       NULL);
-  expander_size = tree_view->priv->expander_size - EXPANDER_EXTRA_PADDING;
+                        "vertical-separator", &vertical_separator,
+                        NULL);
 
   if (! GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_PARENT))
     return;
@@ -10023,41 +10105,33 @@ gtk_tree_view_draw_arrow (GtkTreeView *tree_view,
   area.x = x_offset;
   area.y = gtk_tree_view_get_cell_area_y_offset (tree_view, tree, node,
                                                  vertical_separator);
-  area.width = expander_size;
+  area.width = x2 - x_offset;
   area.height = gtk_tree_view_get_cell_area_height (tree_view, node,
                                                     vertical_separator);
 
-  if (!gtk_widget_get_sensitive (widget))
-    state |= GTK_STATE_FLAG_INSENSITIVE;
-  else
-    {
-      flags = 0;
-
-      if (GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
-        flags |= GTK_CELL_RENDERER_SELECTED;
+  if (GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
+    flags |= GTK_CELL_RENDERER_SELECTED;
 
-      state = gtk_cell_renderer_get_state (NULL, widget, flags);
+  if (node == tree_view->priv->prelight_node &&
+      tree_view->priv->arrow_prelit)
+    flags |= GTK_CELL_RENDERER_PRELIT;
 
-      if (node == tree_view->priv->prelight_node &&
-          tree_view->priv->arrow_prelit)
-       state |= GTK_STATE_FLAG_PRELIGHT;
-    }
+  state = gtk_cell_renderer_get_state (NULL, widget, flags);
 
   if (node->children != NULL)
     state |= GTK_STATE_FLAG_ACTIVE;
+  else
+    state &= ~(GTK_STATE_FLAG_ACTIVE);
 
   gtk_style_context_save (context);
 
   gtk_style_context_set_state (context, state);
   gtk_style_context_add_class (context, GTK_STYLE_CLASS_EXPANDER);
 
-  gtk_style_context_push_animatable_region (context, node);
-
   gtk_render_expander (context, cr,
                        area.x, area.y,
                        area.width, area.height);
 
-  gtk_style_context_pop_animatable_region (context);
   gtk_style_context_restore (context);
 }
 
@@ -10072,8 +10146,9 @@ gtk_tree_view_focus_to_cursor (GtkTreeView *tree_view)
     return;
 
   cursor_path = NULL;
-  if (tree_view->priv->cursor)
-    cursor_path = gtk_tree_row_reference_get_path (tree_view->priv->cursor);
+  if (tree_view->priv->cursor_node)
+    cursor_path = _gtk_tree_path_new_from_rbtree (tree_view->priv->cursor_tree,
+                                                  tree_view->priv->cursor_node);
 
   if (cursor_path == NULL)
     {
@@ -10090,8 +10165,7 @@ gtk_tree_view_focus_to_cursor (GtkTreeView *tree_view)
       if (selected_rows)
        {
           cursor_path = gtk_tree_path_copy((const GtkTreePath *)(selected_rows->data));
-         g_list_foreach (selected_rows, (GFunc)gtk_tree_path_free, NULL);
-         g_list_free (selected_rows);
+         g_list_free_full (selected_rows, (GDestroyNotify) gtk_tree_path_free);
         }
       else
        {
@@ -10100,15 +10174,12 @@ gtk_tree_view_focus_to_cursor (GtkTreeView *tree_view)
                                       TRUE, NULL, NULL);
        }
 
-      gtk_tree_row_reference_free (tree_view->priv->cursor);
-      tree_view->priv->cursor = NULL;
-
       if (cursor_path)
        {
          if (gtk_tree_selection_get_mode (tree_view->priv->selection) == GTK_SELECTION_MULTIPLE)
-           gtk_tree_view_real_set_cursor (tree_view, cursor_path, FALSE, FALSE);
+           gtk_tree_view_real_set_cursor (tree_view, cursor_path, 0);
          else
-           gtk_tree_view_real_set_cursor (tree_view, cursor_path, TRUE, FALSE);
+           gtk_tree_view_real_set_cursor (tree_view, cursor_path, CLEAR_AND_SELECT);
        }
     }
 
@@ -10128,7 +10199,7 @@ gtk_tree_view_focus_to_cursor (GtkTreeView *tree_view)
                {
                  GtkCellArea *cell_area;
 
-                 tree_view->priv->focus_column = GTK_TREE_VIEW_COLUMN (list->data);
+                  _gtk_tree_view_set_focus_column (tree_view, GTK_TREE_VIEW_COLUMN (list->data));
 
                  /* This happens when the treeview initially grabs focus and there
                   * is no column in focus, here we explicitly focus into the first cell */
@@ -10154,8 +10225,6 @@ gtk_tree_view_move_cursor_up_down (GtkTreeView *tree_view,
                                   gint         count)
 {
   gint selection_count;
-  GtkRBTree *cursor_tree = NULL;
-  GtkRBNode *cursor_node = NULL;
   GtkRBTree *new_cursor_tree = NULL;
   GtkRBNode *new_cursor_node = NULL;
   GtkTreePath *cursor_path = NULL;
@@ -10169,18 +10238,11 @@ gtk_tree_view_move_cursor_up_down (GtkTreeView *tree_view,
   if (! gtk_widget_has_focus (GTK_WIDGET (tree_view)))
     return;
 
-  cursor_path = NULL;
-  if (!gtk_tree_row_reference_valid (tree_view->priv->cursor))
-    /* FIXME: we lost the cursor; should we get the first? */
+  if (tree_view->priv->cursor_node == NULL)
     return;
 
-  cursor_path = gtk_tree_row_reference_get_path (tree_view->priv->cursor);
-  _gtk_tree_view_find_node (tree_view, cursor_path,
-                           &cursor_tree, &cursor_node);
-
-  if (cursor_tree == NULL)
-    /* FIXME: we lost the cursor; should we get the first? */
-    return;
+  cursor_path = _gtk_tree_path_new_from_rbtree (tree_view->priv->cursor_tree,
+                                                tree_view->priv->cursor_node);
 
   direction = count < 0 ? GTK_DIR_UP : GTK_DIR_DOWN;
 
@@ -10193,9 +10255,9 @@ gtk_tree_view_move_cursor_up_down (GtkTreeView *tree_view,
     {
       gtk_tree_view_column_cell_set_cell_data (tree_view->priv->focus_column,
                                               tree_view->priv->model,
-                                              &iter,
-                                              GTK_RBNODE_FLAG_SET (cursor_node, GTK_RBNODE_IS_PARENT),
-                                              cursor_node->children?TRUE:FALSE);
+                                               &iter,
+                                               GTK_RBNODE_FLAG_SET (tree_view->priv->cursor_node, GTK_RBNODE_IS_PARENT),
+                                              tree_view->priv->cursor_node->children ? TRUE : FALSE);
 
       /* Save the last cell that had focus, if we hit the end of the view we'll give
        * focus back to it. */
@@ -10208,7 +10270,7 @@ gtk_tree_view_move_cursor_up_down (GtkTreeView *tree_view,
 
   selection_count = gtk_tree_selection_count_selected_rows (tree_view->priv->selection);
   selectable = _gtk_tree_selection_row_is_selectable (tree_view->priv->selection,
-                                                     cursor_node,
+                                                     tree_view->priv->cursor_node,
                                                      cursor_path);
 
   if (selection_count == 0
@@ -10217,16 +10279,16 @@ gtk_tree_view_move_cursor_up_down (GtkTreeView *tree_view,
       && selectable)
     {
       /* Don't move the cursor, but just select the current node */
-      new_cursor_tree = cursor_tree;
-      new_cursor_node = cursor_node;
+      new_cursor_tree = tree_view->priv->cursor_tree;
+      new_cursor_node = tree_view->priv->cursor_node;
     }
   else
     {
       if (count == -1)
-       _gtk_rbtree_prev_full (cursor_tree, cursor_node,
+       _gtk_rbtree_prev_full (tree_view->priv->cursor_tree, tree_view->priv->cursor_node,
                               &new_cursor_tree, &new_cursor_node);
       else
-       _gtk_rbtree_next_full (cursor_tree, cursor_node,
+       _gtk_rbtree_next_full (tree_view->priv->cursor_tree, tree_view->priv->cursor_node,
                               &new_cursor_tree, &new_cursor_node);
     }
 
@@ -10234,8 +10296,7 @@ gtk_tree_view_move_cursor_up_down (GtkTreeView *tree_view,
 
   if (new_cursor_node)
     {
-      cursor_path = _gtk_tree_view_find_path (tree_view,
-                                             new_cursor_tree, new_cursor_node);
+      cursor_path = _gtk_tree_path_new_from_rbtree (new_cursor_tree, new_cursor_node);
 
       search_first_focusable_path (tree_view, &cursor_path,
                                   (count != -1),
@@ -10254,28 +10315,29 @@ gtk_tree_view_move_cursor_up_down (GtkTreeView *tree_view,
       new_cursor_node == NULL)
     {
       if (count == -1)
-        _gtk_rbtree_next_full (cursor_tree, cursor_node,
+        _gtk_rbtree_next_full (tree_view->priv->cursor_tree, tree_view->priv->cursor_node,
                               &new_cursor_tree, &new_cursor_node);
       else
-        _gtk_rbtree_prev_full (cursor_tree, cursor_node,
+        _gtk_rbtree_prev_full (tree_view->priv->cursor_tree, tree_view->priv->cursor_node,
                               &new_cursor_tree, &new_cursor_node);
 
       if (new_cursor_node == NULL
-         && !GTK_RBNODE_FLAG_SET (cursor_node, GTK_RBNODE_IS_SELECTED))
+         && !GTK_RBNODE_FLAG_SET (tree_view->priv->cursor_node, GTK_RBNODE_IS_SELECTED))
         {
-          new_cursor_node = cursor_node;
-          new_cursor_tree = cursor_tree;
+          new_cursor_node = tree_view->priv->cursor_node;
+          new_cursor_tree = tree_view->priv->cursor_tree;
         }
       else
         {
+          new_cursor_tree = NULL;
           new_cursor_node = NULL;
         }
     }
 
   if (new_cursor_node)
     {
-      cursor_path = _gtk_tree_view_find_path (tree_view, new_cursor_tree, new_cursor_node);
-      gtk_tree_view_real_set_cursor (tree_view, cursor_path, TRUE, TRUE);
+      cursor_path = _gtk_tree_path_new_from_rbtree (new_cursor_tree, new_cursor_node);
+      gtk_tree_view_real_set_cursor (tree_view, cursor_path, CLEAR_AND_SELECT | CLAMP_NODE);
       gtk_tree_path_free (cursor_path);
 
       /* Give focus to the area in the new row */
@@ -10284,7 +10346,9 @@ gtk_tree_view_move_cursor_up_down (GtkTreeView *tree_view,
     }
   else
     {
-      gtk_tree_view_clamp_node_visible (tree_view, cursor_tree, cursor_node);
+      gtk_tree_view_clamp_node_visible (tree_view, 
+                                        tree_view->priv->cursor_tree,
+                                        tree_view->priv->cursor_node);
 
       if (!tree_view->priv->extend_selection_pressed)
         {
@@ -10320,12 +10384,12 @@ static void
 gtk_tree_view_move_cursor_page_up_down (GtkTreeView *tree_view,
                                        gint         count)
 {
-  GtkRBTree *cursor_tree = NULL;
-  GtkRBNode *cursor_node = NULL;
   GtkTreePath *old_cursor_path = NULL;
   GtkTreePath *cursor_path = NULL;
   GtkRBTree *start_cursor_tree = NULL;
   GtkRBNode *start_cursor_node = NULL;
+  GtkRBTree *cursor_tree;
+  GtkRBNode *cursor_node;
   gint y;
   gint window_y;
   gint vertical_separator;
@@ -10333,25 +10397,15 @@ gtk_tree_view_move_cursor_page_up_down (GtkTreeView *tree_view,
   if (!gtk_widget_has_focus (GTK_WIDGET (tree_view)))
     return;
 
-  if (gtk_tree_row_reference_valid (tree_view->priv->cursor))
-    old_cursor_path = gtk_tree_row_reference_get_path (tree_view->priv->cursor);
-  else
-    /* This is sorta weird.  Focus in should give us a cursor */
+  if (tree_view->priv->cursor_node == NULL)
     return;
 
-  gtk_widget_style_get (GTK_WIDGET (tree_view), "vertical-separator", &vertical_separator, NULL);
-  _gtk_tree_view_find_node (tree_view, old_cursor_path,
-                           &cursor_tree, &cursor_node);
+  old_cursor_path = _gtk_tree_path_new_from_rbtree (tree_view->priv->cursor_tree,
+                                                    tree_view->priv->cursor_node);
 
-  if (cursor_tree == NULL)
-    {
-      /* FIXME: we lost the cursor.  Should we try to get one? */
-      gtk_tree_path_free (old_cursor_path);
-      return;
-    }
-  g_return_if_fail (cursor_node != NULL);
+  gtk_widget_style_get (GTK_WIDGET (tree_view), "vertical-separator", &vertical_separator, NULL);
 
-  y = _gtk_rbtree_node_find_offset (cursor_tree, cursor_node);
+  y = _gtk_rbtree_node_find_offset (tree_view->priv->cursor_tree, tree_view->priv->cursor_node);
   window_y = RBTREE_Y_TO_TREE_WINDOW_Y (tree_view, y);
   y += tree_view->priv->cursor_offset;
   y += count * (int)gtk_adjustment_get_page_increment (tree_view->priv->vadjustment);
@@ -10380,7 +10434,7 @@ gtk_tree_view_move_cursor_page_up_down (GtkTreeView *tree_view,
     }
 
   y -= tree_view->priv->cursor_offset;
-  cursor_path = _gtk_tree_view_find_path (tree_view, cursor_tree, cursor_node);
+  cursor_path = _gtk_tree_path_new_from_rbtree (cursor_tree, cursor_node);
 
   start_cursor_tree = cursor_tree;
   start_cursor_node = cursor_node;
@@ -10395,7 +10449,7 @@ gtk_tree_view_move_cursor_page_up_down (GtkTreeView *tree_view,
        */
       cursor_tree = start_cursor_tree;
       cursor_node = start_cursor_node;
-      cursor_path = _gtk_tree_view_find_path (tree_view, cursor_tree, cursor_node);
+      cursor_path = _gtk_tree_path_new_from_rbtree (cursor_tree, cursor_node);
 
       search_first_focusable_path (tree_view, &cursor_path,
                                   (count == -1),
@@ -10408,7 +10462,7 @@ gtk_tree_view_move_cursor_page_up_down (GtkTreeView *tree_view,
   /* update y */
   y = _gtk_rbtree_node_find_offset (cursor_tree, cursor_node);
 
-  gtk_tree_view_real_set_cursor (tree_view, cursor_path, TRUE, FALSE);
+  gtk_tree_view_real_set_cursor (tree_view, cursor_path, CLEAR_AND_SELECT);
 
   y -= window_y;
   gtk_tree_view_scroll_to_point (tree_view, -1, y);
@@ -10429,8 +10483,6 @@ static void
 gtk_tree_view_move_cursor_left_right (GtkTreeView *tree_view,
                                      gint         count)
 {
-  GtkRBTree *cursor_tree = NULL;
-  GtkRBNode *cursor_node = NULL;
   GtkTreePath *cursor_path = NULL;
   GtkTreeViewColumn *column;
   GtkTreeIter iter;
@@ -10447,14 +10499,12 @@ gtk_tree_view_move_cursor_left_right (GtkTreeView *tree_view,
   if (!gtk_widget_has_focus (GTK_WIDGET (tree_view)))
     return;
 
-  if (gtk_tree_row_reference_valid (tree_view->priv->cursor))
-    cursor_path = gtk_tree_row_reference_get_path (tree_view->priv->cursor);
-  else
+  if (tree_view->priv->cursor_node == NULL)
     return;
 
-  _gtk_tree_view_find_node (tree_view, cursor_path, &cursor_tree, &cursor_node);
-  if (cursor_tree == NULL)
-    return;
+  cursor_path = _gtk_tree_path_new_from_rbtree (tree_view->priv->cursor_tree,
+                                                tree_view->priv->cursor_node);
+
   if (gtk_tree_model_get_iter (tree_view->priv->model, &iter, cursor_path) == FALSE)
     {
       gtk_tree_path_free (cursor_path);
@@ -10488,13 +10538,13 @@ gtk_tree_view_move_cursor_left_right (GtkTreeView *tree_view,
       gtk_tree_view_column_cell_set_cell_data (column,
                                               tree_view->priv->model,
                                               &iter,
-                                              GTK_RBNODE_FLAG_SET (cursor_node, GTK_RBNODE_IS_PARENT),
-                                              cursor_node->children?TRUE:FALSE);
+                                              GTK_RBNODE_FLAG_SET (tree_view->priv->cursor_node, GTK_RBNODE_IS_PARENT),
+                                              tree_view->priv->cursor_node->children ? TRUE : FALSE);
 
       cell_area = gtk_cell_layout_get_area (GTK_CELL_LAYOUT (column));
       if (gtk_cell_area_focus (cell_area, direction))
        {
-         tree_view->priv->focus_column = column;
+          _gtk_tree_view_set_focus_column (tree_view, column);
          found_column = TRUE;
          break;
        }
@@ -10510,8 +10560,8 @@ gtk_tree_view_move_cursor_left_right (GtkTreeView *tree_view,
     {
       if (!gtk_tree_view_has_can_focus_cell (tree_view))
        _gtk_tree_view_queue_draw_node (tree_view,
-                                       cursor_tree,
-                                       cursor_node,
+                                       tree_view->priv->cursor_tree,
+                                       tree_view->priv->cursor_node,
                                        NULL);
       g_signal_emit (tree_view, tree_view_signals[CURSOR_CHANGED], 0);
       gtk_widget_grab_focus (GTK_WIDGET (tree_view));
@@ -10545,23 +10595,23 @@ gtk_tree_view_move_cursor_start_end (GtkTreeView *tree_view,
   gtk_tree_view_get_cursor (tree_view, &old_path, NULL);
 
   cursor_tree = tree_view->priv->tree;
-  cursor_node = cursor_tree->root;
 
   if (count == -1)
     {
-      while (cursor_node && cursor_node->left != cursor_tree->nil)
-       cursor_node = cursor_node->left;
+      cursor_node = _gtk_rbtree_first (cursor_tree);
 
       /* Now go forward to find the first focusable row. */
-      path = _gtk_tree_view_find_path (tree_view, cursor_tree, cursor_node);
+      path = _gtk_tree_path_new_from_rbtree (cursor_tree, cursor_node);
       search_first_focusable_path (tree_view, &path,
                                   TRUE, &cursor_tree, &cursor_node);
     }
   else
     {
+      cursor_node = cursor_tree->root;
+
       do
        {
-         while (cursor_node && cursor_node->right != cursor_tree->nil)
+         while (cursor_node && !_gtk_rbtree_is_nil (cursor_node->right))
            cursor_node = cursor_node->right;
          if (cursor_node->children == NULL)
            break;
@@ -10572,7 +10622,7 @@ gtk_tree_view_move_cursor_start_end (GtkTreeView *tree_view,
       while (1);
 
       /* Now go backwards to find last focusable row. */
-      path = _gtk_tree_view_find_path (tree_view, cursor_tree, cursor_node);
+      path = _gtk_tree_path_new_from_rbtree (cursor_tree, cursor_node);
       search_first_focusable_path (tree_view, &path,
                                   FALSE, &cursor_tree, &cursor_node);
     }
@@ -10582,7 +10632,7 @@ gtk_tree_view_move_cursor_start_end (GtkTreeView *tree_view,
 
   if (gtk_tree_path_compare (old_path, path))
     {
-      gtk_tree_view_real_set_cursor (tree_view, path, TRUE, TRUE);
+      gtk_tree_view_real_set_cursor (tree_view, path, CLEAR_AND_SELECT | CLAMP_NODE);
       gtk_widget_grab_focus (GTK_WIDGET (tree_view));
     }
   else
@@ -10637,12 +10687,12 @@ gtk_tree_view_real_select_cursor_row (GtkTreeView *tree_view,
   if (!gtk_widget_has_focus (GTK_WIDGET (tree_view)))
     return FALSE;
 
-  if (tree_view->priv->cursor)
-    cursor_path = gtk_tree_row_reference_get_path (tree_view->priv->cursor);
-
-  if (cursor_path == NULL)
+  if (tree_view->priv->cursor_node == NULL)
     return FALSE;
 
+  cursor_path = _gtk_tree_path_new_from_rbtree (tree_view->priv->cursor_tree,
+                                                tree_view->priv->cursor_node);
+
   _gtk_tree_view_find_node (tree_view, cursor_path,
                            &cursor_tree, &cursor_node);
 
@@ -10702,31 +10752,20 @@ gtk_tree_view_real_toggle_cursor_row (GtkTreeView *tree_view)
 {
   GtkRBTree *new_tree = NULL;
   GtkRBNode *new_node = NULL;
-  GtkRBTree *cursor_tree = NULL;
-  GtkRBNode *cursor_node = NULL;
   GtkTreePath *cursor_path = NULL;
 
   if (!gtk_widget_has_focus (GTK_WIDGET (tree_view)))
     return FALSE;
 
-  cursor_path = NULL;
-  if (tree_view->priv->cursor)
-    cursor_path = gtk_tree_row_reference_get_path (tree_view->priv->cursor);
-
-  if (cursor_path == NULL)
+  if (tree_view->priv->cursor_node == NULL)
     return FALSE;
 
-  _gtk_tree_view_find_node (tree_view, cursor_path,
-                           &cursor_tree, &cursor_node);
-  if (cursor_tree == NULL)
-    {
-      gtk_tree_path_free (cursor_path);
-      return FALSE;
-    }
+  cursor_path = _gtk_tree_path_new_from_rbtree (tree_view->priv->cursor_tree,
+                                                tree_view->priv->cursor_node);
 
   _gtk_tree_selection_internal_select_node (tree_view->priv->selection,
-                                           cursor_node,
-                                           cursor_tree,
+                                           tree_view->priv->cursor_node,
+                                           tree_view->priv->cursor_tree,
                                            cursor_path,
                                             GTK_TREE_SELECT_MODE_TOGGLE,
                                            FALSE);
@@ -10737,10 +10776,12 @@ gtk_tree_view_real_toggle_cursor_row (GtkTreeView *tree_view)
    */
   _gtk_tree_view_find_node (tree_view, cursor_path, &new_tree, &new_node);
 
-  if (cursor_tree != new_tree || cursor_node != new_node)
+  if (tree_view->priv->cursor_node != new_node)
     return FALSE;
 
-  gtk_tree_view_clamp_node_visible (tree_view, cursor_tree, cursor_node);
+  gtk_tree_view_clamp_node_visible (tree_view,
+                                    tree_view->priv->cursor_tree,
+                                    tree_view->priv->cursor_node);
 
   gtk_widget_grab_focus (GTK_WIDGET (tree_view));
   gtk_tree_view_queue_draw_path (tree_view, cursor_path, NULL);
@@ -10756,24 +10797,18 @@ gtk_tree_view_real_expand_collapse_cursor_row (GtkTreeView *tree_view,
                                               gboolean     open_all)
 {
   GtkTreePath *cursor_path = NULL;
-  GtkRBTree *tree;
-  GtkRBNode *node;
 
   if (!gtk_widget_has_focus (GTK_WIDGET (tree_view)))
     return FALSE;
 
-  cursor_path = NULL;
-  if (tree_view->priv->cursor)
-    cursor_path = gtk_tree_row_reference_get_path (tree_view->priv->cursor);
-
-  if (cursor_path == NULL)
+  if (tree_view->priv->cursor_node == NULL)
     return FALSE;
 
-  if (_gtk_tree_view_find_node (tree_view, cursor_path, &tree, &node))
-    return FALSE;
+  cursor_path = _gtk_tree_path_new_from_rbtree (tree_view->priv->cursor_tree,
+                                                tree_view->priv->cursor_node);
 
   /* Don't handle the event if we aren't an expander */
-  if (!((node->flags & GTK_RBNODE_IS_PARENT) == GTK_RBNODE_IS_PARENT))
+  if (!GTK_RBNODE_FLAG_SET (tree_view->priv->cursor_node, GTK_RBNODE_IS_PARENT))
     return FALSE;
 
   if (!logical
@@ -10781,9 +10816,18 @@ gtk_tree_view_real_expand_collapse_cursor_row (GtkTreeView *tree_view,
     expand = !expand;
 
   if (expand)
-    gtk_tree_view_real_expand_row (tree_view, cursor_path, tree, node, open_all, TRUE);
+    gtk_tree_view_real_expand_row (tree_view,
+                                   cursor_path,
+                                   tree_view->priv->cursor_tree,
+                                   tree_view->priv->cursor_node,
+                                   open_all,
+                                   TRUE);
   else
-    gtk_tree_view_real_collapse_row (tree_view, cursor_path, tree, node, TRUE);
+    gtk_tree_view_real_collapse_row (tree_view,
+                                     cursor_path,
+                                     tree_view->priv->cursor_tree,
+                                     tree_view->priv->cursor_node,
+                                     TRUE);
 
   gtk_tree_path_free (cursor_path);
 
@@ -10793,34 +10837,21 @@ gtk_tree_view_real_expand_collapse_cursor_row (GtkTreeView *tree_view,
 static gboolean
 gtk_tree_view_real_select_cursor_parent (GtkTreeView *tree_view)
 {
-  GtkRBTree *cursor_tree = NULL;
-  GtkRBNode *cursor_node = NULL;
   GtkTreePath *cursor_path = NULL;
   GdkModifierType state;
 
   if (!gtk_widget_has_focus (GTK_WIDGET (tree_view)))
     goto out;
 
-  cursor_path = NULL;
-  if (tree_view->priv->cursor)
-    cursor_path = gtk_tree_row_reference_get_path (tree_view->priv->cursor);
-
-  if (cursor_path == NULL)
+  if (tree_view->priv->cursor_node == NULL)
     goto out;
 
-  _gtk_tree_view_find_node (tree_view, cursor_path,
-                           &cursor_tree, &cursor_node);
-  if (cursor_tree == NULL)
-    {
-      gtk_tree_path_free (cursor_path);
-      goto out;
-    }
+  cursor_path = _gtk_tree_path_new_from_rbtree (tree_view->priv->cursor_tree,
+                                                tree_view->priv->cursor_node);
 
-  if (cursor_tree->parent_node)
+  if (tree_view->priv->cursor_tree->parent_node)
     {
       gtk_tree_view_queue_draw_path (tree_view, cursor_path, NULL);
-      cursor_node = cursor_tree->parent_node;
-      cursor_tree = cursor_tree->parent_tree;
 
       gtk_tree_path_up (cursor_path);
 
@@ -10836,12 +10867,10 @@ gtk_tree_view_real_select_cursor_parent (GtkTreeView *tree_view)
            tree_view->priv->modify_selection_pressed = TRUE;
        }
 
-      gtk_tree_view_real_set_cursor (tree_view, cursor_path, TRUE, FALSE);
-      gtk_tree_view_clamp_node_visible (tree_view, cursor_tree, cursor_node);
+      gtk_tree_view_real_set_cursor (tree_view, cursor_path, CLEAR_AND_SELECT | CLAMP_NODE);
+      gtk_tree_path_free (cursor_path);
 
       gtk_widget_grab_focus (GTK_WIDGET (tree_view));
-      gtk_tree_view_queue_draw_path (tree_view, cursor_path, NULL);
-      gtk_tree_path_free (cursor_path);
 
       tree_view->priv->modify_selection_pressed = FALSE;
 
@@ -11086,50 +11115,6 @@ gtk_tree_view_start_interactive_search (GtkTreeView *tree_view)
                                                       TRUE);
 }
 
-/* this function returns the new width of the column being resized given
- * the column and x position of the cursor; the x cursor position is passed
- * in as a pointer and automagicly corrected if it's beyond min/max limits
- */
-static gint
-gtk_tree_view_new_column_width (GtkTreeView *tree_view,
-                               gint       i,
-                               gint      *x)
-{
-  GtkAllocation allocation;
-  GtkTreeViewColumn *column;
-  GtkRequisition button_req;
-  gint max_width, min_width;
-  gint width;
-  gboolean rtl;
-
-  /* first translate the x position from widget->window
-   * to clist->clist_window
-   */
-  rtl = (gtk_widget_get_direction (GTK_WIDGET (tree_view)) == GTK_TEXT_DIR_RTL);
-  column = g_list_nth (tree_view->priv->columns, i)->data;
-  gtk_widget_get_allocation (gtk_tree_view_column_get_button (column), &allocation);
-  width = rtl ? (allocation.x + allocation.width - *x) : (*x - allocation.x);
-
-  /* Clamp down the value */
-  min_width = gtk_tree_view_column_get_min_width (column);
-  if (min_width == -1)
-    {
-      gtk_widget_get_preferred_size (gtk_tree_view_column_get_button (column), &button_req, NULL);
-      width = MAX (button_req.width, width);
-    }
-  else
-    width = MAX (min_width, width);
-
-  max_width = gtk_tree_view_column_get_max_width (column);
-  if (max_width != -1)
-    width = MIN (width, max_width);
-
-  *x = rtl ? (allocation.x + allocation.width - width) : (allocation.x + width);
-
-  return width;
-}
-
-
 /* FIXME this adjust_allocation is a big cut-and-paste from
  * GtkCList, needs to be some "official" way to do this
  * factored out.
@@ -11211,7 +11196,6 @@ gtk_tree_view_adjustment_changed (GtkAdjustment *adjustment,
 {
   if (gtk_widget_get_realized (GTK_WIDGET (tree_view)))
     {
-      GtkStyleContext *context;
       gint dy;
        
       gdk_window_move (tree_view->priv->bin_window,
@@ -11254,9 +11238,6 @@ gtk_tree_view_adjustment_changed (GtkAdjustment *adjustment,
        }
       gdk_window_scroll (tree_view->priv->bin_window, 0, dy);
 
-      context = gtk_widget_get_style_context (GTK_WIDGET (tree_view));
-      gtk_style_context_scroll_animations (context, tree_view->priv->bin_window, 0, dy);
-
       if (tree_view->priv->dy != (int) gtk_adjustment_get_value (tree_view->priv->vadjustment))
         {
           /* update our dy and top_row */
@@ -11265,9 +11246,6 @@ gtk_tree_view_adjustment_changed (GtkAdjustment *adjustment,
           if (!tree_view->priv->in_top_row_to_dy)
             gtk_tree_view_dy_to_top_row (tree_view);
        }
-
-      gdk_window_process_updates (tree_view->priv->header_window, TRUE);
-      gtk_tree_view_bin_process_updates (tree_view);
     }
 }
 
@@ -11325,7 +11303,7 @@ gtk_tree_view_get_model (GtkTreeView *tree_view)
 
 /**
  * gtk_tree_view_set_model:
- * @tree_view: A #GtkTreeNode.
+ * @tree_view: A #GtkTreeView.
  * @model: (allow-none): The model.
  *
  * Sets the model for a #GtkTreeView.  If the @tree_view already has a model
@@ -11354,14 +11332,10 @@ gtk_tree_view_set_model (GtkTreeView  *tree_view,
   if (tree_view->priv->model)
     {
       GList *tmplist = tree_view->priv->columns;
-      GtkStyleContext *context;
 
       gtk_tree_view_unref_and_check_selection_tree (tree_view, tree_view->priv->tree);
       gtk_tree_view_stop_editing (tree_view, TRUE);
 
-      context = gtk_widget_get_style_context (GTK_WIDGET (tree_view));
-      gtk_style_context_cancel_animations (context, NULL);
-
       g_signal_handlers_disconnect_by_func (tree_view->priv->model,
                                            gtk_tree_view_row_changed,
                                            tree_view);
@@ -11387,8 +11361,6 @@ gtk_tree_view_set_model (GtkTreeView  *tree_view,
 
       gtk_tree_row_reference_free (tree_view->priv->drag_dest_row);
       tree_view->priv->drag_dest_row = NULL;
-      gtk_tree_row_reference_free (tree_view->priv->cursor);
-      tree_view->priv->cursor = NULL;
       gtk_tree_row_reference_free (tree_view->priv->anchor);
       tree_view->priv->anchor = NULL;
       gtk_tree_row_reference_free (tree_view->priv->top_row);
@@ -11464,6 +11436,7 @@ gtk_tree_view_set_model (GtkTreeView  *tree_view,
        {
          tree_view->priv->tree = _gtk_rbtree_new ();
          gtk_tree_view_build_tree (tree_view, tree_view->priv->tree, &iter, 1, FALSE);
+          _gtk_tree_view_accessible_add (tree_view, tree_view->priv->tree, NULL);
        }
       gtk_tree_path_free (path);
 
@@ -11471,6 +11444,8 @@ gtk_tree_view_set_model (GtkTreeView  *tree_view,
       install_presize_handler (tree_view);
     }
 
+  gtk_tree_view_real_set_cursor (tree_view, NULL, CURSOR_INVALID);
+
   g_object_notify (G_OBJECT (tree_view), "model");
 
   if (tree_view->priv->selection)
@@ -11810,7 +11785,7 @@ gtk_tree_view_get_headers_clickable (GtkTreeView *tree_view)
 }
 
 /**
- * gtk_tree_view_set_rules_hint
+ * gtk_tree_view_set_rules_hint:
  * @tree_view: a #GtkTreeView
  * @setting: %TRUE if the tree requires reading across rows
  *
@@ -11846,7 +11821,7 @@ gtk_tree_view_set_rules_hint (GtkTreeView  *tree_view,
 }
 
 /**
- * gtk_tree_view_get_rules_hint
+ * gtk_tree_view_get_rules_hint:
  * @tree_view: a #GtkTreeView
  *
  * Gets the setting set by gtk_tree_view_set_rules_hint().
@@ -11861,6 +11836,50 @@ gtk_tree_view_get_rules_hint (GtkTreeView  *tree_view)
   return tree_view->priv->has_rules;
 }
 
+
+/**
+ * gtk_tree_view_set_activate_on_single_click:
+ * @tree_view: a #GtkTreeView
+ * @single: %TRUE to emit row-activated on a single click
+ *
+ * Cause the #GtkTreeView::row-activated signal to be emitted
+ * on a single click instead of a double click.
+ *
+ * Since: 3.8
+ **/
+void
+gtk_tree_view_set_activate_on_single_click (GtkTreeView *tree_view,
+                                            gboolean     single)
+{
+  g_return_if_fail (GTK_IS_TREE_VIEW (tree_view));
+
+  single = single != FALSE;
+
+  if (tree_view->priv->activate_on_single_click == single)
+    return;
+
+  tree_view->priv->activate_on_single_click = single;
+  g_object_notify (G_OBJECT (tree_view), "activate-on-single-click");
+}
+
+/**
+ * gtk_tree_view_get_activate_on_single_click:
+ * @tree_view: a #GtkTreeView
+ *
+ * Gets the setting set by gtk_tree_view_set_activate_on_single_click().
+ *
+ * Return value: %TRUE if row-activated will be emitted on a single click
+ *
+ * Since: 3.8
+ **/
+gboolean
+gtk_tree_view_get_activate_on_single_click (GtkTreeView *tree_view)
+{
+  g_return_val_if_fail (GTK_IS_TREE_VIEW (tree_view), FALSE);
+
+  return tree_view->priv->activate_on_single_click;
+}
+
 /* Public Column functions
  */
 
@@ -11896,7 +11915,7 @@ _gtk_tree_view_reset_header_styles (GtkTreeView *tree_view)
       GtkTreeViewColumn *column = columns->data;
       GtkWidget *header_widget;
 
-      if (gtk_tree_view_column_get_visible (column))
+      if (!gtk_tree_view_column_get_visible (column))
         continue;
 
       header_widget = gtk_tree_view_column_get_widget (column);
@@ -11904,7 +11923,7 @@ _gtk_tree_view_reset_header_styles (GtkTreeView *tree_view)
       if (!header_widget)
         header_widget = gtk_tree_view_column_get_button (column);
 
-      gtk_widget_reset_style (header_widget);
+      _gtk_widget_invalidate_style_context (header_widget, GTK_CSS_CHANGE_PARENT_REGION);
     }
 }
 
@@ -11922,12 +11941,14 @@ gint
 gtk_tree_view_remove_column (GtkTreeView       *tree_view,
                              GtkTreeViewColumn *column)
 {
+  guint position;
+
   g_return_val_if_fail (GTK_IS_TREE_VIEW (tree_view), -1);
   g_return_val_if_fail (GTK_IS_TREE_VIEW_COLUMN (column), -1);
   g_return_val_if_fail (gtk_tree_view_column_get_tree_view (column) == GTK_WIDGET (tree_view), -1);
 
   if (tree_view->priv->focus_column == column)
-    tree_view->priv->focus_column = NULL;
+    _gtk_tree_view_set_focus_column (tree_view, NULL);
 
   if (tree_view->priv->edited_column == column)
     {
@@ -11944,7 +11965,7 @@ gtk_tree_view_remove_column (GtkTreeView       *tree_view,
                                         G_CALLBACK (column_sizing_notify),
                                         tree_view);
 
-  _gtk_tree_view_column_unset_tree_view (column);
+  position = g_list_index (tree_view->priv->columns, column);
 
   tree_view->priv->columns = g_list_remove (tree_view->priv->columns, column);
   tree_view->priv->n_columns--;
@@ -11971,6 +11992,8 @@ gtk_tree_view_remove_column (GtkTreeView       *tree_view,
     }
 
   _gtk_tree_view_reset_header_styles (tree_view);
+  _gtk_tree_view_column_unset_tree_view (column);
+  _gtk_tree_view_accessible_remove_column (tree_view, column, position);
 
   g_object_unref (column);
   g_signal_emit (tree_view, tree_view_signals[COLUMNS_CHANGED], 0);
@@ -12004,6 +12027,9 @@ gtk_tree_view_insert_column (GtkTreeView       *tree_view,
     g_return_val_if_fail (gtk_tree_view_column_get_sizing (column)
                           == GTK_TREE_VIEW_COLUMN_FIXED, -1);
 
+  if (position < 0 || position > tree_view->priv->n_columns)
+    position = tree_view->priv->n_columns;
+
   g_object_ref_sink (column);
 
   if (tree_view->priv->n_columns == 0 &&
@@ -12038,6 +12064,9 @@ gtk_tree_view_insert_column (GtkTreeView       *tree_view,
     }
 
   _gtk_tree_view_reset_header_styles (tree_view);
+
+  _gtk_tree_view_accessible_add_column (tree_view, column, position);
+
   g_signal_emit (tree_view, tree_view_signals[COLUMNS_CHANGED], 0);
 
   return tree_view->priv->n_columns;
@@ -12107,7 +12136,7 @@ gtk_tree_view_insert_column_with_attributes (GtkTreeView     *tree_view,
  * @dnotify: destroy notifier for @data
  *
  * Convenience function that inserts a new column into the #GtkTreeView
- * with the given cell renderer and a #GtkCellDataFunc to set cell renderer
+ * with the given cell renderer and a #GtkTreeCellDataFunc to set cell renderer
  * attributes (normally using data from the model). See also
  * gtk_tree_view_column_set_cell_data_func(), gtk_tree_view_column_pack_start().
  * If @tree_view has "fixed_height" mode enabled, then the new column will have its
@@ -12139,6 +12168,24 @@ gtk_tree_view_insert_column_with_data_func  (GtkTreeView               *tree_vie
   return gtk_tree_view_insert_column (tree_view, column, position);
 }
 
+/**
+ * gtk_tree_view_get_n_columns:
+ * @tree_view: a #GtkTreeView
+ *
+ * Queries the number of columns in the given @tree_view.
+ *
+ * Returns: The number of columns in the @tree_view
+ *
+ * Since: 3.4
+ **/
+guint
+gtk_tree_view_get_n_columns (GtkTreeView *tree_view)
+{
+  g_return_val_if_fail (GTK_IS_TREE_VIEW (tree_view), 0);
+
+  return tree_view->priv->n_columns;
+}
+
 /**
  * gtk_tree_view_get_column:
  * @tree_view: A #GtkTreeView.
@@ -12236,6 +12283,9 @@ gtk_tree_view_move_column_after (GtkTreeView       *tree_view,
     }
 
   _gtk_tree_view_reset_header_styles (tree_view);
+
+  _gtk_tree_view_accessible_reorder_column (tree_view, column);
+
   g_signal_emit (tree_view, tree_view_signals[COLUMNS_CHANGED], 0);
 }
 
@@ -12511,7 +12561,7 @@ gtk_tree_view_expand_all_emission_helper (GtkRBTree *tree,
       GtkTreePath *path;
       GtkTreeIter iter;
 
-      path = _gtk_tree_view_find_path (tree_view, tree, node);
+      path = _gtk_tree_path_new_from_rbtree (tree, node);
       gtk_tree_model_get_iter (tree_view->priv->model, &iter, path);
 
       g_signal_emit (tree_view, tree_view_signals[ROW_EXPANDED], 0, &iter, path);
@@ -12582,9 +12632,7 @@ gtk_tree_view_collapse_all (GtkTreeView *tree_view)
   indices = gtk_tree_path_get_indices (path);
 
   tree = tree_view->priv->tree;
-  node = tree->root;
-  while (node && node->left != tree->nil)
-    node = node->left;
+  node = _gtk_rbtree_first (tree);
 
   while (node)
     {
@@ -12676,9 +12724,7 @@ gtk_tree_view_real_expand_row (GtkTreeView *tree_view,
 
       gtk_tree_path_append_index (tmp_path, 0);
       tree = node->children;
-      node = tree->root;
-      while (node->left != tree->nil)
-       node = node->left;
+      node = _gtk_rbtree_first (tree);
       /* try to expand the children */
       do
         {
@@ -12718,21 +12764,10 @@ gtk_tree_view_real_expand_row (GtkTreeView *tree_view,
                            gtk_tree_path_get_depth (path) + 1,
                            open_all);
 
-  if (animate)
-    {
-      GtkStyleContext *context;
-
-      context = gtk_widget_get_style_context (GTK_WIDGET (tree_view));
-
-      gtk_style_context_save (context);
-      gtk_style_context_add_class (context, GTK_STYLE_CLASS_EXPANDER);
-
-      gtk_style_context_notify_state_change (context, tree_view->priv->bin_window,
-                                             node, GTK_STATE_ACTIVE, TRUE);
-
-      _gtk_style_context_invalidate_animation_areas (context);
-      gtk_style_context_restore (context);
-    }
+  _gtk_tree_view_accessible_add (tree_view, node->children, NULL);
+  _gtk_tree_view_accessible_add_state (tree_view,
+                                       tree, node,
+                                       GTK_CELL_RENDERER_EXPANDED);
 
   install_presize_handler (tree_view);
 
@@ -12796,6 +12831,7 @@ gtk_tree_view_real_collapse_row (GtkTreeView *tree_view,
   gint x, y;
   GList *list;
   GdkWindow *child;
+  gboolean selection_changed, cursor_changed;
 
   if (animate)
     g_object_get (gtk_widget_get_settings (GTK_WIDGET (tree_view)),
@@ -12859,19 +12895,13 @@ gtk_tree_view_real_collapse_row (GtkTreeView *tree_view,
       gtk_tree_path_free (child_path);
     }
 
-  if (gtk_tree_row_reference_valid (tree_view->priv->cursor))
+  if (tree_view->priv->cursor_node)
     {
-      GtkTreePath *cursor_path = gtk_tree_row_reference_get_path (tree_view->priv->cursor);
-
-      if (gtk_tree_path_is_ancestor (path, cursor_path))
-       {
-         gtk_tree_row_reference_free (tree_view->priv->cursor);
-         tree_view->priv->cursor = gtk_tree_row_reference_new_proxy (G_OBJECT (tree_view),
-                                                                     tree_view->priv->model,
-                                                                     path);
-       }
-      gtk_tree_path_free (cursor_path);
+      cursor_changed = (node->children == tree_view->priv->cursor_tree)
+                       || _gtk_rbtree_contains (node->children, tree_view->priv->cursor_tree);
     }
+  else
+    cursor_changed = FALSE;
 
   if (gtk_tree_row_reference_valid (tree_view->priv->anchor))
     {
@@ -12884,35 +12914,23 @@ gtk_tree_view_real_collapse_row (GtkTreeView *tree_view,
       gtk_tree_path_free (anchor_path);
     }
 
+  selection_changed = gtk_tree_view_unref_and_check_selection_tree (tree_view, node->children);
+  
   /* Stop a pending double click */
   tree_view->priv->last_button_x = -1;
   tree_view->priv->last_button_y = -1;
 
   _gtk_tree_view_accessible_remove (tree_view, node->children, NULL);
+  _gtk_tree_view_accessible_remove_state (tree_view,
+                                          tree, node,
+                                          GTK_CELL_RENDERER_EXPANDED);
 
-  if (gtk_tree_view_unref_and_check_selection_tree (tree_view, node->children))
-    {
-      _gtk_rbtree_remove (node->children);
-      g_signal_emit_by_name (tree_view->priv->selection, "changed");
-    }
-  else
-    _gtk_rbtree_remove (node->children);
-
-  if (animate)
-    {
-      GtkStyleContext *context;
-
-      context = gtk_widget_get_style_context (GTK_WIDGET (tree_view));
-
-      gtk_style_context_save (context);
-      gtk_style_context_add_class (context, GTK_STYLE_CLASS_EXPANDER);
-
-      gtk_style_context_notify_state_change (context, tree_view->priv->bin_window,
-                                             node, GTK_STATE_ACTIVE, FALSE);
+  _gtk_rbtree_remove (node->children);
 
-      _gtk_style_context_invalidate_animation_areas (context);
-      gtk_style_context_restore (context);
-    }
+  if (cursor_changed)
+    gtk_tree_view_real_set_cursor (tree_view, path, CLEAR_AND_SELECT | CURSOR_INVALID);
+  if (selection_changed)
+    g_signal_emit_by_name (tree_view->priv->selection, "changed");
 
   if (gtk_widget_get_mapped (GTK_WIDGET (tree_view)))
     {
@@ -12996,10 +13014,7 @@ gtk_tree_view_map_expanded_rows_helper (GtkTreeView            *tree_view,
   if (tree == NULL || tree->root == NULL)
     return;
 
-  node = tree->root;
-
-  while (node && node->left != tree->nil)
-    node = node->left;
+  node = _gtk_rbtree_first (tree);
 
   while (node)
     {
@@ -13146,49 +13161,43 @@ gtk_tree_view_set_reorderable (GtkTreeView *tree_view,
 static void
 gtk_tree_view_real_set_cursor (GtkTreeView     *tree_view,
                               GtkTreePath     *path,
-                              gboolean         clear_and_select,
-                              gboolean         clamp_node)
+                               SetCursorFlags   flags)
 {
-  GtkRBTree *tree = NULL;
-  GtkRBNode *node = NULL;
-
-  if (gtk_tree_row_reference_valid (tree_view->priv->cursor))
+  if (!(flags & CURSOR_INVALID) && tree_view->priv->cursor_node)
     {
-      GtkTreePath *cursor_path;
-      cursor_path = gtk_tree_row_reference_get_path (tree_view->priv->cursor);
-      gtk_tree_view_queue_draw_path (tree_view, cursor_path, NULL);
-      gtk_tree_path_free (cursor_path);
+      _gtk_tree_view_accessible_remove_state (tree_view,
+                                              tree_view->priv->cursor_tree,
+                                              tree_view->priv->cursor_node,
+                                              GTK_CELL_RENDERER_FOCUSED);
+      _gtk_tree_view_queue_draw_node (tree_view,
+                                      tree_view->priv->cursor_tree,
+                                      tree_view->priv->cursor_node,
+                                      NULL);
     }
 
-  gtk_tree_row_reference_free (tree_view->priv->cursor);
-  tree_view->priv->cursor = NULL;
-
   /* One cannot set the cursor on a separator.   Also, if
    * _gtk_tree_view_find_node returns TRUE, it ran out of tree
    * before finding the tree and node belonging to path.  The
    * path maps to a non-existing path and we will silently bail out.
    * We unset tree and node to avoid further processing.
    */
-  if (!row_is_separator (tree_view, NULL, path)
-      && _gtk_tree_view_find_node (tree_view, path, &tree, &node) == FALSE)
-    {
-      tree_view->priv->cursor =
-          gtk_tree_row_reference_new_proxy (G_OBJECT (tree_view),
-                                            tree_view->priv->model,
-                                            path);
-    }
-  else
+  if (path == NULL || 
+      row_is_separator (tree_view, NULL, path)
+      || _gtk_tree_view_find_node (tree_view,
+                                   path,
+                                   &tree_view->priv->cursor_tree,
+                                   &tree_view->priv->cursor_node))
     {
-      tree = NULL;
-      node = NULL;
+      tree_view->priv->cursor_tree = NULL;
+      tree_view->priv->cursor_node = NULL;
     }
 
-  if (tree != NULL)
+  if (tree_view->priv->cursor_node != NULL)
     {
       GtkRBTree *new_tree = NULL;
       GtkRBNode *new_node = NULL;
 
-      if (clear_and_select && !tree_view->priv->modify_selection_pressed)
+      if ((flags & CLEAR_AND_SELECT) && !tree_view->priv->modify_selection_pressed)
         {
           GtkTreeSelectMode mode = 0;
 
@@ -13196,7 +13205,10 @@ gtk_tree_view_real_set_cursor (GtkTreeView     *tree_view,
             mode |= GTK_TREE_SELECT_MODE_EXTEND;
 
           _gtk_tree_selection_internal_select_node (tree_view->priv->selection,
-                                                    node, tree, path, mode,
+                                                    tree_view->priv->cursor_node,
+                                                    tree_view->priv->cursor_tree,
+                                                    path,
+                                                    mode,
                                                     FALSE);
         }
 
@@ -13206,17 +13218,28 @@ gtk_tree_view_real_set_cursor (GtkTreeView     *tree_view,
        */
       _gtk_tree_view_find_node (tree_view, path, &new_tree, &new_node);
 
-      if (tree != new_tree || node != new_node)
+      if (tree_view->priv->cursor_node != new_node)
         return;
 
-      if (clamp_node)
+      if (flags & CLAMP_NODE)
         {
-         gtk_tree_view_clamp_node_visible (tree_view, tree, node);
-         _gtk_tree_view_queue_draw_node (tree_view, tree, node, NULL);
+         gtk_tree_view_clamp_node_visible (tree_view,
+                                            tree_view->priv->cursor_tree,
+                                            tree_view->priv->cursor_node);
+         _gtk_tree_view_queue_draw_node (tree_view,
+                                          tree_view->priv->cursor_tree,
+                                          tree_view->priv->cursor_node,
+                                          NULL);
        }
+
+      _gtk_tree_view_accessible_add_state (tree_view,
+                                           tree_view->priv->cursor_tree,
+                                           tree_view->priv->cursor_node,
+                                           GTK_CELL_RENDERER_FOCUSED);
     }
 
-  g_signal_emit (tree_view, tree_view_signals[CURSOR_CHANGED], 0);
+  if (!gtk_widget_in_destruction (GTK_WIDGET (tree_view)))
+    g_signal_emit (tree_view, tree_view_signals[CURSOR_CHANGED], 0);
 }
 
 /**
@@ -13241,8 +13264,9 @@ gtk_tree_view_get_cursor (GtkTreeView        *tree_view,
 
   if (path)
     {
-      if (gtk_tree_row_reference_valid (tree_view->priv->cursor))
-       *path = gtk_tree_row_reference_get_path (tree_view->priv->cursor);
+      if (tree_view->priv->cursor_node)
+        *path = _gtk_tree_path_new_from_rbtree (tree_view->priv->cursor_tree,
+                                                tree_view->priv->cursor_node);
       else
        *path = NULL;
     }
@@ -13333,7 +13357,7 @@ gtk_tree_view_set_cursor_on_cell (GtkTreeView       *tree_view,
       (gtk_cell_layout_get_area (GTK_CELL_LAYOUT (tree_view->priv->edited_column))))
     gtk_tree_view_stop_editing (tree_view, TRUE);
 
-  gtk_tree_view_real_set_cursor (tree_view, path, TRUE, TRUE);
+  gtk_tree_view_real_set_cursor (tree_view, path, CLEAR_AND_SELECT | CLAMP_NODE);
 
   if (focus_column &&
       gtk_tree_view_column_get_visible (focus_column))
@@ -13348,7 +13372,7 @@ gtk_tree_view_set_cursor_on_cell (GtkTreeView       *tree_view,
            break;
          }
       g_return_if_fail (column_in_tree);
-      tree_view->priv->focus_column = focus_column;
+      _gtk_tree_view_set_focus_column (tree_view, focus_column);
       if (focus_cell)
        gtk_tree_view_column_focus_cell (focus_column, focus_cell);
       if (start_editing)
@@ -13505,7 +13529,7 @@ gtk_tree_view_get_path_at_pos (GtkTreeView        *tree_view,
     *cell_y = y_offset;
 
   if (path)
-    *path = _gtk_tree_view_find_path (tree_view, tree, node);
+    *path = _gtk_tree_path_new_from_rbtree (tree, node);
 
   return TRUE;
 }
@@ -13516,6 +13540,7 @@ gtk_tree_view_get_cell_area_height (GtkTreeView *tree_view,
                                     GtkRBNode   *node,
                                     gint         vertical_separator)
 {
+  int expander_size = gtk_tree_view_get_expander_size (tree_view);
   int height;
 
   /* The "cell" areas are the cell_area passed in to gtk_cell_renderer_render(),
@@ -13527,8 +13552,8 @@ gtk_tree_view_get_cell_area_height (GtkTreeView *tree_view,
    * function will not be called for irregular (e.g. separator) rows.
    */
   height = gtk_tree_view_get_row_height (tree_view, node);
-  if (height < tree_view->priv->expander_size)
-    height = tree_view->priv->expander_size;
+  if (height < expander_size)
+    height = expander_size;
 
   return height - vertical_separator;
 }
@@ -13635,9 +13660,10 @@ gtk_tree_view_get_cell_area (GtkTreeView        *tree_view,
 
          if (gtk_tree_view_draw_expanders (tree_view))
            {
+              int expander_size = gtk_tree_view_get_expander_size (tree_view);
              if (!rtl)
-               rect->x += depth * tree_view->priv->expander_size;
-             rect->width -= depth * tree_view->priv->expander_size;
+               rect->x += depth * expander_size;
+             rect->width -= depth * expander_size;
            }
 
          rect->width = MAX (rect->width, 0);
@@ -13649,6 +13675,7 @@ static inline gint
 gtk_tree_view_get_row_height (GtkTreeView *tree_view,
                               GtkRBNode   *node)
 {
+  int expander_size = gtk_tree_view_get_expander_size (tree_view);
   int height;
 
   /* The "background" areas of all rows/cells add up to cover the entire tree.
@@ -13661,7 +13688,7 @@ gtk_tree_view_get_row_height (GtkTreeView *tree_view,
    */
   height = GTK_RBNODE_GET_HEIGHT (node);
   if (height <= 0)
-    height = tree_view->priv->expander_size;
+    height = expander_size;
 
   return height;
 }
@@ -13983,7 +14010,7 @@ gtk_tree_view_get_visible_range (GtkTreeView  *tree_view,
                                TREE_WINDOW_Y_TO_RBTREE_Y (tree_view, 0),
                                &tree, &node);
       if (node)
-        *start_path = _gtk_tree_view_find_path (tree_view, tree, node);
+        *start_path = _gtk_tree_path_new_from_rbtree (tree, node);
       else
         retval = FALSE;
     }
@@ -13999,7 +14026,7 @@ gtk_tree_view_get_visible_range (GtkTreeView  *tree_view,
 
       _gtk_rbtree_find_offset (tree_view->priv->tree, y, &tree, &node);
       if (node)
-        *end_path = _gtk_tree_view_find_path (tree_view, tree, node);
+        *end_path = _gtk_tree_path_new_from_rbtree (tree, node);
       else
         retval = FALSE;
     }
@@ -14489,7 +14516,6 @@ gtk_tree_view_create_row_drag_icon (GtkTreeView  *tree_view,
   GtkRBTree    *tree;
   GtkRBNode    *node;
   GtkStyleContext *context;
-  GtkStateFlags state;
   gint cell_offset;
   GList *list;
   GdkRectangle background_area;
@@ -14529,11 +14555,6 @@ gtk_tree_view_create_row_drag_icon (GtkTreeView  *tree_view,
   context = gtk_widget_get_style_context (widget);
 
   gtk_style_context_save (context);
-
-  state = gtk_widget_get_state_flags (widget);
-  gtk_style_context_set_state (context, state);
-
-  gtk_style_context_add_class (context, GTK_STYLE_CLASS_VIEW);
   gtk_style_context_add_region (context, GTK_STYLE_REGION_COLUMN, 0);
 
   gtk_widget_style_get (widget,
@@ -14609,9 +14630,10 @@ gtk_tree_view_create_row_drag_icon (GtkTreeView  *tree_view,
 
           if (gtk_tree_view_draw_expanders (tree_view))
            {
+              int expander_size = gtk_tree_view_get_expander_size (tree_view);
              if (!rtl)
-               cell_area.x += depth * tree_view->priv->expander_size;
-             cell_area.width -= depth * tree_view->priv->expander_size;
+               cell_area.x += depth * expander_size;
+             cell_area.width -= depth * expander_size;
            }
         }
 
@@ -14670,6 +14692,8 @@ gtk_tree_view_create_row_drag_icon (GtkTreeView  *tree_view,
  * This function should almost never be used.  It is meant for private use by
  * ATK for determining the number of visible children that are removed when the
  * user collapses a row, or a row is deleted.
+ *
+ * Deprecated: 3.4: Accessibility does not need the function anymore.
  **/
 void
 gtk_tree_view_set_destroy_count_func (GtkTreeView             *tree_view,
@@ -15012,7 +15036,7 @@ gtk_tree_view_search_position_func (GtkTreeView *tree_view,
   GdkRectangle monitor;
 
   monitor_num = gdk_screen_get_monitor_at_window (screen, tree_window);
-  gdk_screen_get_monitor_geometry (screen, monitor_num, &monitor);
+  gdk_screen_get_monitor_workarea (screen, monitor_num, &monitor);
 
   gtk_widget_realize (search_dialog);
 
@@ -15074,8 +15098,6 @@ gtk_tree_view_search_activate (GtkEntry    *entry,
                               GtkTreeView *tree_view)
 {
   GtkTreePath *path;
-  GtkRBNode *node;
-  GtkRBTree *tree;
 
   gtk_tree_view_search_dialog_hide (tree_view->priv->search_window,
                                    tree_view,
@@ -15083,14 +15105,13 @@ gtk_tree_view_search_activate (GtkEntry    *entry,
 
   /* If we have a row selected and it's the cursor row, we activate
    * the row XXX */
-  if (gtk_tree_row_reference_valid (tree_view->priv->cursor))
+  if (tree_view->priv->cursor_node &&
+      GTK_RBNODE_FLAG_SET (tree_view->priv->cursor_node, GTK_RBNODE_IS_SELECTED))
     {
-      path = gtk_tree_row_reference_get_path (tree_view->priv->cursor);
-      
-      _gtk_tree_view_find_node (tree_view, path, &tree, &node);
+      path = _gtk_tree_path_new_from_rbtree (tree_view->priv->cursor_tree,
+                                             tree_view->priv->cursor_node);
       
-      if (node && GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
-       gtk_tree_view_row_activated (tree_view, path, tree_view->priv->focus_column);
+      gtk_tree_view_row_activated (tree_view, path, tree_view->priv->focus_column);
       
       gtk_tree_path_free (path);
     }
@@ -15393,7 +15414,7 @@ gtk_tree_view_search_iter (GtkTreeModel     *model,
               gtk_tree_view_scroll_to_cell (tree_view, path, NULL,
                                            TRUE, 0.5, 0.0);
               gtk_tree_selection_select_iter (selection, iter);
-              gtk_tree_view_real_set_cursor (tree_view, path, FALSE, TRUE);
+              gtk_tree_view_real_set_cursor (tree_view, path, CLAMP_NODE);
 
              if (path)
                gtk_tree_path_free (path);
@@ -15408,10 +15429,7 @@ gtk_tree_view_search_iter (GtkTreeModel     *model,
          GtkTreeIter tmp;
 
          tree = node->children;
-         node = tree->root;
-
-         while (node->left != tree->nil)
-           node = node->left;
+          node = _gtk_rbtree_first (tree);
 
          tmp = *iter;
          has_child = gtk_tree_model_iter_children (model, iter, &tmp);
@@ -15600,7 +15618,7 @@ _gtk_tree_view_add_editable (GtkTreeView       *tree_view,
 
   tree_view->priv->edited_column = column;
 
-  gtk_tree_view_real_set_cursor (tree_view, path, FALSE, TRUE);
+  gtk_tree_view_real_set_cursor (tree_view, path, CLAMP_NODE);
   cell_area->y += pre_val - (int)gtk_adjustment_get_value (tree_view->priv->vadjustment);
 
   gtk_widget_get_preferred_size (GTK_WIDGET (cell_editable),
@@ -15697,7 +15715,7 @@ gtk_tree_view_get_hover_selection (GtkTreeView *tree_view)
  * @tree_view: a #GtkTreeView
  * @expand: %TRUE to enable hover selection mode
  *
- * Enables of disables the hover expansion mode of @tree_view.
+ * Enables or disables the hover expansion mode of @tree_view.
  * Hover expansion makes rows expand or collapse if the pointer 
  * moves over them.
  * 
@@ -15874,13 +15892,7 @@ gtk_tree_view_state_flags_changed (GtkWidget     *widget,
                                    GtkStateFlags  previous_state)
 {
   if (gtk_widget_get_realized (widget))
-    {
-      GtkTreeView *tree_view = GTK_TREE_VIEW (widget);
-      GtkStyleContext *context;
-
-      context = gtk_widget_get_style_context (widget);
-      gtk_style_context_set_background (context, tree_view->priv->bin_window);
-    }
+    gtk_tree_view_ensure_background (GTK_TREE_VIEW (widget));
 
   gtk_widget_queue_draw (widget);
 }
@@ -16408,7 +16420,7 @@ gtk_tree_view_set_tooltip_query_cb (GtkWidget  *widget,
  * for you. @column should be set to the column in @tree_view's model
  * containing the tooltip texts, or -1 to disable this feature.
  *
- * When enabled, #GtkWidget::has-tooltip will be set to %TRUE and
+ * When enabled, #GtkWidget:has-tooltip will be set to %TRUE and
  * @tree_view will connect a #GtkWidget::query-tooltip signal handler.
  *
  * Note that the signal handler sets the text with gtk_tooltip_set_markup(),