[gtk+/treeview-refactor-staging: 1/10] Removed all variables from GtkTreeViewColumn and created GtkTreeViewColumnPrivate



commit 67b08d8c48af84cc4a81d14a4c4147477b14403a
Author: Tristan Van Berkom <tristan van berkom gmail com>
Date:   Tue Nov 30 14:29:45 2010 +0900

    Removed all variables from GtkTreeViewColumn and created GtkTreeViewColumnPrivate
    
    Some details:
      - button_request was not needed, consult the minimum request of the button
      - gtk_tree_view_column_get_button() needed to be public as people can set
        tooltips on the button (and libgail accesses the button).

 gtk/gtktreeprivate.h              |   48 ++-
 gtk/gtktreeview.c                 |  371 +++++++++-----
 gtk/gtktreeviewcolumn.c           | 1028 +++++++++++++++++++++++--------------
 gtk/gtktreeviewcolumn.h           |   57 +--
 modules/other/gail/gailtreeview.c |    2 +-
 tests/testtooltips.c              |    2 +-
 6 files changed, 924 insertions(+), 584 deletions(-)
---
diff --git a/gtk/gtktreeprivate.h b/gtk/gtktreeprivate.h
index 8e11e18..1a5f9b3 100644
--- a/gtk/gtktreeprivate.h
+++ b/gtk/gtktreeprivate.h
@@ -414,6 +414,20 @@ void         _gtk_tree_view_remove_editable           (GtkTreeView       *tree_v
                                                        GtkTreeViewColumn *column,
                                                        GtkCellEditable   *cell_editable);
 
+void       _gtk_tree_view_install_mark_rows_col_dirty (GtkTreeView *tree_view);
+void             _gtk_tree_view_column_autosize          (GtkTreeView       *tree_view,
+							  GtkTreeViewColumn *column);
+
+
+GtkTreeSelection* _gtk_tree_selection_new                (void);
+GtkTreeSelection* _gtk_tree_selection_new_with_tree_view (GtkTreeView      *tree_view);
+void              _gtk_tree_selection_set_tree_view      (GtkTreeSelection *selection,
+                                                          GtkTreeView      *tree_view);
+gboolean          _gtk_tree_selection_row_is_selectable  (GtkTreeSelection *selection,
+							  GtkRBNode        *node,
+							  GtkTreePath      *path);
+
+
 void _gtk_tree_view_column_realize_button   (GtkTreeViewColumn *column);
 void _gtk_tree_view_column_unrealize_button (GtkTreeViewColumn *column);
 void _gtk_tree_view_column_set_tree_view    (GtkTreeViewColumn *column,
@@ -434,22 +448,10 @@ gboolean _gtk_tree_view_column_cell_event   (GtkTreeViewColumn  *tree_column,
 					     const GdkRectangle *background_area,
 					     const GdkRectangle *cell_area,
 					     guint               flags);
-void _gtk_tree_view_install_mark_rows_col_dirty (GtkTreeView *tree_view);
-void             _gtk_tree_view_column_autosize          (GtkTreeView       *tree_view,
-							  GtkTreeViewColumn *column);
-
-gboolean         _gtk_tree_view_column_has_editable_cell (GtkTreeViewColumn *column);
-GtkCellRenderer *_gtk_tree_view_column_get_edited_cell   (GtkTreeViewColumn *column);
-GtkCellRenderer *_gtk_tree_view_column_get_cell_at_pos   (GtkTreeViewColumn *column,
-							  gint               x);
-
-GtkTreeSelection* _gtk_tree_selection_new                (void);
-GtkTreeSelection* _gtk_tree_selection_new_with_tree_view (GtkTreeView      *tree_view);
-void              _gtk_tree_selection_set_tree_view      (GtkTreeSelection *selection,
-                                                          GtkTreeView      *tree_view);
-gboolean          _gtk_tree_selection_row_is_selectable  (GtkTreeSelection *selection,
-							  GtkRBNode        *node,
-							  GtkTreePath      *path);
+gboolean          _gtk_tree_view_column_has_editable_cell(GtkTreeViewColumn  *column);
+GtkCellRenderer  *_gtk_tree_view_column_get_edited_cell  (GtkTreeViewColumn  *column);
+GtkCellRenderer  *_gtk_tree_view_column_get_cell_at_pos  (GtkTreeViewColumn  *column,
+							  gint                x);
 
 void		  _gtk_tree_view_column_cell_render      (GtkTreeViewColumn  *tree_column,
 							  cairo_t            *cr,
@@ -467,6 +469,20 @@ gboolean	  _gtk_tree_view_column_cell_focus       (GtkTreeViewColumn  *tree_colu
 							  gboolean            right);
 void		  _gtk_tree_view_column_cell_set_dirty	 (GtkTreeViewColumn  *tree_column,
 							  gboolean            install_handler);
+gboolean          _gtk_tree_view_column_cell_get_dirty   (GtkTreeViewColumn  *tree_column);
+GdkWindow        *_gtk_tree_view_column_get_window       (GtkTreeViewColumn  *column);
+
+void              _gtk_tree_view_column_set_requested_width   (GtkTreeViewColumn  *column,
+							       gint                width);
+gint              _gtk_tree_view_column_get_requested_width   (GtkTreeViewColumn  *column);
+void              _gtk_tree_view_column_set_resized_width     (GtkTreeViewColumn  *column,
+							       gint                width);
+gint              _gtk_tree_view_column_get_resized_width     (GtkTreeViewColumn  *column);
+void              _gtk_tree_view_column_set_use_resized_width (GtkTreeViewColumn  *column,
+							       gboolean            use_resized_width);
+gboolean          _gtk_tree_view_column_get_use_resized_width (GtkTreeViewColumn  *column);
+gint              _gtk_tree_view_column_get_drag_x            (GtkTreeViewColumn  *column);
+GtkCellAreaContext *_gtk_tree_view_column_get_context         (GtkTreeViewColumn  *column);
 
 G_END_DECLS
 
diff --git a/gtk/gtktreeview.c b/gtk/gtktreeview.c
index 84948aa..a8b1790 100644
--- a/gtk/gtktreeview.c
+++ b/gtk/gtktreeview.c
@@ -45,6 +45,7 @@
 #include "gtktreemodelsort.h"
 #include "gtktooltip.h"
 #include "gtkscrollable.h"
+#include "gtkcelllayout.h"
 #include "gtkprivate.h"
 #include "gtkwidgetprivate.h"
 #include "gtkentryprivate.h"
@@ -1786,26 +1787,32 @@ gtk_tree_view_map_buttons (GtkTreeView *tree_view)
   if (GTK_TREE_VIEW_FLAG_SET (tree_view, GTK_TREE_VIEW_HEADERS_VISIBLE))
     {
       GtkTreeViewColumn *column;
+      GtkWidget         *button;
+      GdkWindow         *window;
 
       for (list = tree_view->priv->columns; list; list = list->next)
 	{
 	  column = list->data;
-          if (gtk_widget_get_visible (column->button) &&
-              !gtk_widget_get_mapped (column->button))
-            gtk_widget_map (column->button);
+	  button = gtk_tree_view_column_get_button (column);
+
+          if (gtk_widget_get_visible (button) &&
+              !gtk_widget_get_mapped (button))
+            gtk_widget_map (button);
 	}
       for (list = tree_view->priv->columns; list; list = list->next)
 	{
 	  column = list->data;
 	  if (gtk_tree_view_column_get_visible (column) == FALSE)
 	    continue;
+
+	  window = _gtk_tree_view_column_get_window (column);
 	  if (gtk_tree_view_column_get_resizable (column))
 	    {
-	      gdk_window_raise (column->window);
-	      gdk_window_show (column->window);
+	      gdk_window_raise (window);
+	      gdk_window_show (window);
 	    }
 	  else
-	    gdk_window_hide (column->window);
+	    gdk_window_hide (window);
 	}
       gdk_window_show (tree_view->priv->header_window);
     }
@@ -2028,16 +2035,16 @@ gtk_tree_view_size_request_columns (GtkTreeView *tree_view)
     {
       for (list = tree_view->priv->columns; list; list = list->next)
         {
-          GtkRequisition requisition;
+          GtkRequisition     requisition;
           GtkTreeViewColumn *column = list->data;
+	  GtkWidget         *button = gtk_tree_view_column_get_button (column);
 
-	  if (column->button == NULL)
+	  if (button == NULL)
 	    continue;
 
           column = list->data;
 
-          gtk_widget_get_preferred_size (column->button, &requisition, NULL);
-	  column->button_request = requisition.width;
+          gtk_widget_get_preferred_size (button, &requisition, NULL);
           tree_view->priv->header_height = MAX (tree_view->priv->header_height, requisition.height);
         }
     }
@@ -2073,9 +2080,9 @@ gtk_tree_view_update_size (GtkTreeView *tree_view)
       if (!gtk_tree_view_column_get_visible (column))
 	continue;
 
-      if (column->use_resized_width)
+      if (_gtk_tree_view_column_get_use_resized_width (column))
 	{
-	  real_requested_width = column->resized_width;
+	  real_requested_width = _gtk_tree_view_column_get_resized_width (column);
 	}
       else if (gtk_tree_view_column_get_sizing (column) == GTK_TREE_VIEW_COLUMN_FIXED)
 	{
@@ -2083,11 +2090,16 @@ gtk_tree_view_update_size (GtkTreeView *tree_view)
 	}
       else if (GTK_TREE_VIEW_FLAG_SET (tree_view, GTK_TREE_VIEW_HEADERS_VISIBLE))
 	{
-	  real_requested_width = MAX (column->requested_width, column->button_request);
+	  GtkWidget *button = gtk_tree_view_column_get_button (column);
+	  gint       button_request;
+
+	  gtk_widget_get_preferred_width (button, &button_request, NULL);
+
+	  real_requested_width = MAX (_gtk_tree_view_column_get_requested_width (column), button_request);
 	}
       else
 	{
-	  real_requested_width = column->requested_width;
+	  real_requested_width = _gtk_tree_view_column_get_requested_width (column);
 	}
 
       min_width = gtk_tree_view_column_get_min_width (column);
@@ -2235,9 +2247,9 @@ gtk_tree_view_get_real_requested_width_from_column (GtkTreeView       *tree_view
   gint max_width, min_width;
   gint real_requested_width;
 
-  if (column->use_resized_width)
+  if (_gtk_tree_view_column_get_use_resized_width (column))
     {
-      real_requested_width = column->resized_width;
+      real_requested_width = _gtk_tree_view_column_get_resized_width (column);
     }
   else if (gtk_tree_view_column_get_sizing (column) == GTK_TREE_VIEW_COLUMN_FIXED)
     {
@@ -2245,11 +2257,16 @@ gtk_tree_view_get_real_requested_width_from_column (GtkTreeView       *tree_view
     }
   else if (GTK_TREE_VIEW_FLAG_SET (tree_view, GTK_TREE_VIEW_HEADERS_VISIBLE))
     {
-      real_requested_width = MAX (column->requested_width, column->button_request);
+      GtkWidget *button = gtk_tree_view_column_get_button (column);
+      gint       button_request;
+
+      gtk_widget_get_preferred_width (button, &button_request, NULL);
+
+      real_requested_width = MAX (_gtk_tree_view_column_get_requested_width (column), button_request);
     }
   else
     {
-      real_requested_width = column->requested_width;
+      real_requested_width = _gtk_tree_view_column_get_requested_width (column);
       if (real_requested_width < 0)
         real_requested_width = 0;
     }
@@ -2359,6 +2376,8 @@ gtk_tree_view_size_allocate_columns (GtkWidget *widget,
        list != (rtl ? first_column->prev : last_column->next);
        list = (rtl ? list->prev : list->next)) 
     {
+      GtkWidget *button;
+      GdkWindow *window;
       gint real_requested_width = 0;
       gint internal_column_width = 0;
       gint old_width, column_width;
@@ -2374,13 +2393,15 @@ gtk_tree_view_size_allocate_columns (GtkWidget *widget,
       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 (tree_view->priv->drag_column->button,
-				    &drag_allocation);
+	  gtk_widget_size_allocate (button, &drag_allocation);
 	  width += drag_allocation.width;
 	  continue;
 	}
@@ -2430,10 +2451,13 @@ gtk_tree_view_size_allocate_columns (GtkWidget *widget,
       if (column_width > old_width)
         column_changed = TRUE;
 
-      gtk_widget_size_allocate (column->button, &allocation);
+      button = gtk_tree_view_column_get_button (column);
+      window = _gtk_tree_view_column_get_window (column);
+
+      gtk_widget_size_allocate (button, &allocation);
 
-      if (column->window)
-	gdk_window_move_resize (column->window,
+      if (window)
+	gdk_window_move_resize (window,
                                 allocation.x + (rtl ? 0 : allocation.width) - TREE_VIEW_DRAG_WIDTH/2,
 				allocation.y,
                                 TREE_VIEW_DRAG_WIDTH, allocation.height);
@@ -2773,7 +2797,7 @@ gtk_tree_view_button_press (GtkWidget      *widget,
 	  if (!gtk_tree_view_column_get_visible (candidate))
 	    continue;
 
-	  background_area.width = candidate->width;
+	  background_area.width = gtk_tree_view_column_get_width (candidate);
 	  if ((background_area.x > (gint) event->x) ||
 	      (background_area.x + background_area.width <= (gint) event->x))
 	    {
@@ -2847,7 +2871,8 @@ gtk_tree_view_button_press (GtkWidget      *widget,
 						    &background_area,
 						    &cell_area, flags))
 		{
-                  cell_editable = gtk_cell_area_get_edit_widget (column->cell_area);
+		  GtkCellArea *area = gtk_cell_layout_get_area (GTK_CELL_LAYOUT (column));
+                  cell_editable = gtk_cell_area_get_edit_widget (area);
 
 		  if (cell_editable != NULL)
 		    {
@@ -2990,22 +3015,23 @@ gtk_tree_view_button_press (GtkWidget      *widget,
   for (i = 0, list = tree_view->priv->columns; list; list = list->next, i++)
     {
       column = list->data;
-      if (event->window == column->window &&
+      if (event->window == _gtk_tree_view_column_get_window (column) &&
 	  gtk_tree_view_column_get_resizable (column) &&
-	  column->window)
+	  _gtk_tree_view_column_get_window (column))
 	{
+	  GtkWidget *button;
           GtkAllocation button_allocation;
 	  gpointer drag_data;
 
 	  if (event->type == GDK_2BUTTON_PRESS &&
 	      gtk_tree_view_column_get_sizing (column) != GTK_TREE_VIEW_COLUMN_AUTOSIZE)
 	    {
-	      column->use_resized_width = FALSE;
+	      _gtk_tree_view_column_set_use_resized_width (column, FALSE);
 	      _gtk_tree_view_column_autosize (tree_view, column);
 	      return TRUE;
 	    }
 
-	  if (gdk_pointer_grab (column->window, FALSE,
+	  if (gdk_pointer_grab (_gtk_tree_view_column_get_window (column), FALSE,
 				GDK_POINTER_MOTION_HINT_MASK |
 				GDK_BUTTON1_MOTION_MASK |
 				GDK_BUTTON_RELEASE_MASK,
@@ -3014,8 +3040,9 @@ gtk_tree_view_button_press (GtkWidget      *widget,
 
 	  gtk_grab_add (widget);
 	  GTK_TREE_VIEW_SET_FLAG (tree_view, GTK_TREE_VIEW_IN_COLUMN_RESIZE);
-	  column->resized_width = gtk_tree_view_column_get_width (column) -
-                                  tree_view->priv->last_extra_space_per_column;
+
+	  _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");
@@ -3025,7 +3052,8 @@ gtk_tree_view_button_press (GtkWidget      *widget,
 					     0, 0, NULL, NULL,
 					     drag_data);
 
-          gtk_widget_get_allocation (column->button, &button_allocation);
+	  button = gtk_tree_view_column_get_button (column);
+          gtk_widget_get_allocation (button, &button_allocation);
 	  tree_view->priv->drag_pos = i;
 	  tree_view->priv->x_drag = button_allocation.x + (rtl ? 0 : button_allocation.width);
 
@@ -3044,6 +3072,7 @@ gtk_tree_view_button_release_drag_column (GtkWidget      *widget,
 					  GdkEventButton *event)
 {
   GtkTreeView *tree_view;
+  GtkWidget *button;
   GList *l;
   gboolean rtl;
 
@@ -3054,21 +3083,22 @@ gtk_tree_view_button_release_drag_column (GtkWidget      *widget,
   gdk_display_keyboard_ungrab (gtk_widget_get_display (widget), GDK_CURRENT_TIME);
 
   /* Move the button back */
-  g_object_ref (tree_view->priv->drag_column->button);
-  gtk_container_remove (GTK_CONTAINER (tree_view), tree_view->priv->drag_column->button);
-  gtk_widget_set_parent_window (tree_view->priv->drag_column->button, tree_view->priv->header_window);
-  gtk_widget_set_parent (tree_view->priv->drag_column->button, GTK_WIDGET (tree_view));
-  g_object_unref (tree_view->priv->drag_column->button);
+  button = gtk_tree_view_column_get_button (tree_view->priv->drag_column);
+  g_object_ref (button);
+  gtk_container_remove (GTK_CONTAINER (tree_view), button);
+  gtk_widget_set_parent_window (button, tree_view->priv->header_window);
+  gtk_widget_set_parent (button, GTK_WIDGET (tree_view));
+  g_object_unref (button);
   gtk_widget_queue_resize (widget);
   if (gtk_tree_view_column_get_resizable (tree_view->priv->drag_column))
     {
-      gdk_window_raise (tree_view->priv->drag_column->window);
-      gdk_window_show (tree_view->priv->drag_column->window);
+      gdk_window_raise (_gtk_tree_view_column_get_window (tree_view->priv->drag_column));
+      gdk_window_show (_gtk_tree_view_column_get_window (tree_view->priv->drag_column));
     }
   else
-    gdk_window_hide (tree_view->priv->drag_column->window);
+    gdk_window_hide (_gtk_tree_view_column_get_window (tree_view->priv->drag_column));
 
-  gtk_widget_grab_focus (tree_view->priv->drag_column->button);
+  gtk_widget_grab_focus (button);
 
   if (rtl)
     {
@@ -3387,7 +3417,8 @@ prelight_or_select (GtkTreeView *tree_view,
   if (tree_view->priv->hover_selection &&
       (mode == GTK_SELECTION_SINGLE || mode == GTK_SELECTION_BROWSE) &&
       !(tree_view->priv->edited_column &&
-	gtk_cell_area_get_edit_widget (tree_view->priv->edited_column->cell_area)))
+	gtk_cell_area_get_edit_widget 
+	(gtk_cell_layout_get_area (GTK_CELL_LAYOUT (tree_view->priv->edited_column)))))
     {
       if (node)
 	{
@@ -3502,16 +3533,19 @@ gtk_tree_view_motion_draw_column_motion_arrow (GtkTreeView *tree_view)
     {
       GtkAllocation left_allocation, right_allocation;
       GdkRectangle visible_rect;
+      GtkWidget *button;
 
       gtk_tree_view_get_visible_rect (tree_view, &visible_rect);
       if (reorder->left_column)
         {
-          gtk_widget_get_allocation (reorder->left_column->button, &left_allocation);
+	  button = gtk_tree_view_column_get_button (reorder->left_column);
+          gtk_widget_get_allocation (button, &left_allocation);
           x = left_allocation.x + left_allocation.width;
         }
       else
         {
-          gtk_widget_get_allocation (reorder->right_column->button, &right_allocation);
+	  button = gtk_tree_view_column_get_button (reorder->right_column);
+          gtk_widget_get_allocation (button, &right_allocation);
           x = right_allocation.x;
         }
 
@@ -3529,6 +3563,7 @@ gtk_tree_view_motion_draw_column_motion_arrow (GtkTreeView *tree_view)
       if (tree_view->priv->drag_column_window_state != DRAG_COLUMN_WINDOW_STATE_ORIGINAL)
 	{
           GtkAllocation drag_allocation;
+	  GtkWidget    *button;
 
 	  if (tree_view->priv->drag_highlight_window)
 	    {
@@ -3537,11 +3572,12 @@ gtk_tree_view_motion_draw_column_motion_arrow (GtkTreeView *tree_view)
 	      gdk_window_destroy (tree_view->priv->drag_highlight_window);
 	    }
 
+	  button = gtk_tree_view_column_get_button (tree_view->priv->drag_column);
 	  attributes.window_type = GDK_WINDOW_CHILD;
 	  attributes.wclass = GDK_INPUT_OUTPUT;
           attributes.x = tree_view->priv->drag_column_x;
           attributes.y = 0;
-          gtk_widget_get_allocation (tree_view->priv->drag_column->button, &drag_allocation);
+          gtk_widget_get_allocation (button, &drag_allocation);
 	  width = attributes.width = drag_allocation.width;
 	  height = attributes.height = drag_allocation.height;
 	  attributes.visual = gtk_widget_get_visual (GTK_WIDGET (tree_view));
@@ -3570,6 +3606,7 @@ gtk_tree_view_motion_draw_column_motion_arrow (GtkTreeView *tree_view)
   else if (arrow_type == DRAG_COLUMN_WINDOW_STATE_ARROW)
     {
       GtkAllocation button_allocation;
+      GtkWidget    *button;
 
       width = tree_view->priv->expander_size;
 
@@ -3577,13 +3614,15 @@ gtk_tree_view_motion_draw_column_motion_arrow (GtkTreeView *tree_view)
       gdk_window_get_origin (tree_view->priv->header_window, &x, &y);
       if (reorder->left_column)
 	{
-          gtk_widget_get_allocation (reorder->left_column->button, &button_allocation);
+	  button = gtk_tree_view_column_get_button (reorder->left_column);
+          gtk_widget_get_allocation (button, &button_allocation);
 	  x += button_allocation.x + button_allocation.width - width/2;
 	  height = button_allocation.height;
 	}
       else
 	{
-          gtk_widget_get_allocation (reorder->right_column->button, &button_allocation);
+	  button = gtk_tree_view_column_get_button (reorder->right_column);
+          gtk_widget_get_allocation (button, &button_allocation);
 	  x += button_allocation.x - width/2;
 	  height = button_allocation.height;
 	}
@@ -3640,6 +3679,7 @@ gtk_tree_view_motion_draw_column_motion_arrow (GtkTreeView *tree_view)
 	   arrow_type == DRAG_COLUMN_WINDOW_STATE_ARROW_RIGHT)
     {
       GtkAllocation allocation;
+      GtkWidget    *button;
 
       width = tree_view->priv->expander_size;
 
@@ -3655,12 +3695,14 @@ gtk_tree_view_motion_draw_column_motion_arrow (GtkTreeView *tree_view)
 
       if (reorder->left_column)
         {
-          gtk_widget_get_allocation (reorder->left_column->button, &allocation);
+	  button = gtk_tree_view_column_get_button (reorder->left_column);
+          gtk_widget_get_allocation (button, &allocation);
           height = allocation.height;
         }
       else
         {
-          gtk_widget_get_allocation (reorder->right_column->button, &allocation);
+	  button = gtk_tree_view_column_get_button (reorder->right_column);
+          gtk_widget_get_allocation (button, &allocation);
           height = allocation.height;
         }
 
@@ -3754,10 +3796,14 @@ gtk_tree_view_motion_resize_column (GtkWidget      *widget,
   if (x != tree_view->priv->x_drag &&
       (new_width != gtk_tree_view_column_get_fixed_width (column)))
     {
-      column->use_resized_width = TRUE;
-      column->resized_width = new_width;
+      _gtk_tree_view_column_set_use_resized_width (column, TRUE);
+
       if (gtk_tree_view_column_get_expand (column))
-	column->resized_width -= tree_view->priv->last_extra_space_per_column;
+	new_width -= tree_view->priv->last_extra_space_per_column;
+
+      _gtk_tree_view_column_set_resized_width (column, new_width);
+
+
       gtk_widget_queue_resize (widget);
     }
 
@@ -3848,6 +3894,7 @@ gtk_tree_view_motion_drag_column (GtkWidget      *widget,
   GtkAllocation allocation, button_allocation;
   GtkTreeView *tree_view = (GtkTreeView *) widget;
   GtkTreeViewColumn *column = tree_view->priv->drag_column;
+  GtkWidget *button;
   gint x, y;
 
   /* Sanity Check */
@@ -3855,11 +3902,13 @@ gtk_tree_view_motion_drag_column (GtkWidget      *widget,
       (event->window != tree_view->priv->drag_window))
     return FALSE;
 
+  button = gtk_tree_view_column_get_button (column);
+
   /* Handle moving the header */
   gdk_window_get_position (tree_view->priv->drag_window, &x, &y);
   gtk_widget_get_allocation (widget, &allocation);
-  gtk_widget_get_allocation (column->button, &button_allocation);
-  x = CLAMP (x + (gint)event->x - column->drag_x, 0,
+  gtk_widget_get_allocation (button, &button_allocation);
+  x = CLAMP (x + (gint)event->x - _gtk_tree_view_column_get_drag_x (column), 0,
 	     MAX (tree_view->priv->width, allocation.width) - button_allocation.width);
   gdk_window_move (tree_view->priv->drag_window, x, y);
   
@@ -5113,6 +5162,7 @@ gtk_tree_view_draw (GtkWidget *widget,
                     cairo_t   *cr)
 {
   GtkTreeView *tree_view = GTK_TREE_VIEW (widget);
+  GtkWidget   *button;
 
   if (gtk_cairo_should_draw_window (cr, tree_view->priv->bin_window))
     {
@@ -5152,18 +5202,20 @@ gtk_tree_view_draw (GtkWidget *widget,
 	    continue;
 
 	  if (gtk_tree_view_column_get_visible (column))
-	    gtk_container_propagate_draw (GTK_CONTAINER (tree_view),
-					  column->button,
-					  cr);
+	    {
+	      button = gtk_tree_view_column_get_button (column);
+	      gtk_container_propagate_draw (GTK_CONTAINER (tree_view),
+					    button, cr);
+	    }
 	}
     }
   
   if (tree_view->priv->drag_window &&
       gtk_cairo_should_draw_window (cr, tree_view->priv->drag_window))
     {
+      button = gtk_tree_view_column_get_button (tree_view->priv->drag_column);
       gtk_container_propagate_draw (GTK_CONTAINER (tree_view),
-                                    tree_view->priv->drag_column->button,
-                                    cr);
+                                    button, cr);
     }
 
   return TRUE;
@@ -5388,6 +5440,7 @@ gtk_tree_view_key_press (GtkWidget   *widget,
 			 GdkEventKey *event)
 {
   GtkTreeView *tree_view = (GtkTreeView *) widget;
+  GtkWidget   *button;
 
   if (tree_view->priv->rubber_band_status)
     {
@@ -5419,8 +5472,9 @@ gtk_tree_view_key_press (GtkWidget   *widget,
            focus_column = focus_column->next)
         {
           GtkTreeViewColumn *column = GTK_TREE_VIEW_COLUMN (focus_column->data);
-
-          if (gtk_widget_has_focus (column->button))
+	  
+	  button = gtk_tree_view_column_get_button (column);
+          if (gtk_widget_has_focus (button))
             break;
         }
 
@@ -5442,54 +5496,62 @@ gtk_tree_view_key_press (GtkWidget   *widget,
               || event->keyval == (rtl ? GDK_KEY_KP_Right : GDK_KEY_KP_Left))
             {
 	      GtkRequisition button_req;
-              gint old_width = column->resized_width;
+              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 (column->button, &button_req, NULL);
+	      gtk_widget_get_preferred_size (button, &button_req, NULL);
 
-              column->resized_width = MAX (column->resized_width,
-                                           gtk_tree_view_column_get_width (column));
-              column->resized_width -= 2;
-              if (column->resized_width < 0)
-                column->resized_width = 0;
+              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)
-                column->resized_width = MAX (button_req.width,
-                                             column->resized_width);
+                new_width = MAX (button_req.width, new_width);
               else
                 {
-                  column->resized_width = MAX (min_width,
-                                               column->resized_width);
+                  new_width = MAX (min_width, new_width);
                 }
 
               max_width = gtk_tree_view_column_get_max_width (column);
               if (max_width != -1)
-                column->resized_width = MIN (column->resized_width, max_width);
+                new_width = MIN (new_width, max_width);
 
-              column->use_resized_width = TRUE;
+	      _gtk_tree_view_column_set_use_resized_width (column, TRUE);
 
-              if (column->resized_width != old_width)
-                gtk_widget_queue_resize (widget);
+              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);
             }
           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 = column->resized_width;
+              gint old_width = _gtk_tree_view_column_get_resized_width (column);
+	      gint new_width;
 
-              column->resized_width = MAX (column->resized_width,
-                                           gtk_tree_view_column_get_width (column));
-              column->resized_width += 2;
+              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)
-                column->resized_width = MIN (column->resized_width, max_width);
+                new_width = MIN (new_width, max_width);
 
-              column->use_resized_width = TRUE;
+	      _gtk_tree_view_column_set_use_resized_width (column, TRUE);
 
-              if (column->resized_width != old_width)
-                gtk_widget_queue_resize (widget);
+              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);
             }
@@ -5839,7 +5901,8 @@ validate_row (GtkTreeView *tree_view,
       if (!gtk_tree_view_column_get_visible (column))
 	continue;
 
-      if (GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_COLUMN_INVALID) && !column->dirty)
+      if (GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_COLUMN_INVALID) && 
+	  !_gtk_tree_view_column_cell_get_dirty (column))
 	continue;
 
       gtk_tree_view_column_cell_set_cell_data (column, tree_view->priv->model, iter,
@@ -5881,10 +5944,10 @@ validate_row (GtkTreeView *tree_view,
 	    tmp_width += grid_line_width;
 	}
 
-      if (tmp_width > column->requested_width)
+      if (tmp_width > _gtk_tree_view_column_get_requested_width (column))
 	{
 	  retval = TRUE;
-	  column->requested_width = tmp_width;
+	  _gtk_tree_view_column_set_requested_width (column, tmp_width);
 	}
     }
 
@@ -7753,8 +7816,12 @@ gtk_tree_view_remove (GtkContainer *container,
   while (tmp_list)
     {
       GtkTreeViewColumn *column;
+      GtkWidget         *button;
+
       column = tmp_list->data;
-      if (column->button == widget)
+      button = gtk_tree_view_column_get_button (column);
+
+      if (button == widget)
 	{
 	  gtk_widget_unparent (widget);
 	  return;
@@ -7772,6 +7839,7 @@ gtk_tree_view_forall (GtkContainer *container,
   GtkTreeView *tree_view = GTK_TREE_VIEW (container);
   GtkTreeViewChild *child = NULL;
   GtkTreeViewColumn *column;
+  GtkWidget *button;
   GList *tmp_list;
 
   tmp_list = tree_view->priv->children;
@@ -7788,9 +7856,10 @@ gtk_tree_view_forall (GtkContainer *container,
   for (tmp_list = tree_view->priv->columns; tmp_list; tmp_list = tmp_list->next)
     {
       column = tmp_list->data;
+      button = gtk_tree_view_column_get_button (column);
 
-      if (column->button)
-	(* callback) (column->button, callback_data);
+      if (button)
+	(* callback) (button, callback_data);
     }
 }
 
@@ -7809,7 +7878,7 @@ gtk_tree_view_has_can_focus_cell (GtkTreeView *tree_view)
 
       if (!gtk_tree_view_column_get_visible (column))
 	continue;
-      if (gtk_cell_area_is_activatable (column->cell_area))
+      if (gtk_cell_area_is_activatable (gtk_cell_layout_get_area (GTK_CELL_LAYOUT (column))))
 	return TRUE;
     }
 
@@ -7911,7 +7980,7 @@ gtk_tree_view_header_focus (GtkTreeView      *tree_view,
 {
   GtkTreeViewColumn *column;
   GtkWidget *focus_child;
-
+  GtkWidget *button;
   GList *last_column, *first_column;
   GList *tmp_list;
   gboolean rtl;
@@ -7925,8 +7994,9 @@ gtk_tree_view_header_focus (GtkTreeView      *tree_view,
   while (first_column)
     {
       column = GTK_TREE_VIEW_COLUMN (first_column->data);
+      button = gtk_tree_view_column_get_button (column);
 
-      if (gtk_widget_get_can_focus (column->button) &&
+      if (gtk_widget_get_can_focus (button) &&
           gtk_tree_view_column_get_visible (column) &&
           (gtk_tree_view_column_get_clickable (column) ||
            gtk_tree_view_column_get_reorderable (column)))
@@ -7943,8 +8013,9 @@ gtk_tree_view_header_focus (GtkTreeView      *tree_view,
   while (last_column)
     {
       column = GTK_TREE_VIEW_COLUMN (last_column->data);
+      button = gtk_tree_view_column_get_button (column);
 
-      if (gtk_widget_get_can_focus (column->button) &&
+      if (gtk_widget_get_can_focus (button) &&
           gtk_tree_view_column_get_visible (column) &&
           (gtk_tree_view_column_get_clickable (column) ||
            gtk_tree_view_column_get_reorderable (column)))
@@ -7963,11 +8034,16 @@ gtk_tree_view_header_focus (GtkTreeView      *tree_view,
     case GTK_DIR_DOWN:
       if (focus_child == NULL)
 	{
-	  if (tree_view->priv->focus_column != NULL &&
-              gtk_widget_get_can_focus (tree_view->priv->focus_column->button))
-	    focus_child = tree_view->priv->focus_column->button;
+	  if (tree_view->priv->focus_column != NULL)
+	    button = gtk_tree_view_column_get_button (tree_view->priv->focus_column);
+	  else 
+	    button = NULL;
+
+	  if (button && gtk_widget_get_can_focus (button))
+	    focus_child = button;
 	  else
-	    focus_child = GTK_TREE_VIEW_COLUMN (first_column->data)->button;
+	    focus_child = gtk_tree_view_column_get_button (GTK_TREE_VIEW_COLUMN (first_column->data));
+
 	  gtk_widget_grab_focus (focus_child);
 	  break;
 	}
@@ -7978,11 +8054,12 @@ gtk_tree_view_header_focus (GtkTreeView      *tree_view,
       if (focus_child == NULL)
 	{
 	  if (tree_view->priv->focus_column != NULL)
-	    focus_child = tree_view->priv->focus_column->button;
+	    focus_child = gtk_tree_view_column_get_button (tree_view->priv->focus_column);
 	  else if (dir == GTK_DIR_LEFT)
-	    focus_child = GTK_TREE_VIEW_COLUMN (last_column->data)->button;
+	    focus_child = gtk_tree_view_column_get_button (GTK_TREE_VIEW_COLUMN (last_column->data));
 	  else
-	    focus_child = GTK_TREE_VIEW_COLUMN (first_column->data)->button;
+	    focus_child = gtk_tree_view_column_get_button (GTK_TREE_VIEW_COLUMN (first_column->data));
+
 	  gtk_widget_grab_focus (focus_child);
 	  break;
 	}
@@ -7996,7 +8073,7 @@ gtk_tree_view_header_focus (GtkTreeView      *tree_view,
 
       /* We need to move the focus among the row of buttons. */
       for (tmp_list = tree_view->priv->columns; tmp_list; tmp_list = tmp_list->next)
-	if (GTK_TREE_VIEW_COLUMN (tmp_list->data)->button == focus_child)
+	if (gtk_tree_view_column_get_button (GTK_TREE_VIEW_COLUMN (tmp_list->data)) == focus_child)
 	  break;
 
       if ((tmp_list == first_column && dir == (rtl ? GTK_DIR_RIGHT : GTK_DIR_LEFT))
@@ -8009,6 +8086,7 @@ gtk_tree_view_header_focus (GtkTreeView      *tree_view,
       while (tmp_list)
 	{
 	  GtkTreeViewColumn *column;
+	  GtkWidget         *button;
 
 	  if (dir == (rtl ? GTK_DIR_LEFT : GTK_DIR_RIGHT))
 	    tmp_list = tmp_list->next;
@@ -8021,12 +8099,13 @@ gtk_tree_view_header_focus (GtkTreeView      *tree_view,
 	      break;
 	    }
 	  column = tmp_list->data;
-	  if (column->button &&
+	  button = gtk_tree_view_column_get_button (column);
+	  if (button &&
 	      gtk_tree_view_column_get_visible (column) &&
-	      gtk_widget_get_can_focus (column->button))
+	      gtk_widget_get_can_focus (button))
 	    {
-	      focus_child = column->button;
-	      gtk_widget_grab_focus (column->button);
+	      focus_child = button;
+	      gtk_widget_grab_focus (button);
 	      break;
 	    }
 	}
@@ -8041,7 +8120,7 @@ gtk_tree_view_header_focus (GtkTreeView      *tree_view,
   if (focus_child)
     {
       for (tmp_list = tree_view->priv->columns; tmp_list; tmp_list = tmp_list->next)
-	if (GTK_TREE_VIEW_COLUMN (tmp_list->data)->button == focus_child)
+	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);
 	    break;
@@ -8213,7 +8292,7 @@ gtk_tree_view_set_focus_child (GtkContainer *container,
 
   for (list = tree_view->priv->columns; list; list = list->next)
     {
-      if (GTK_TREE_VIEW_COLUMN (list->data)->button == child)
+      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);
 	  break;
@@ -8601,7 +8680,6 @@ gtk_tree_view_row_has_child_toggled (GtkTreeModel *model,
 	  for (list = tree_view->priv->columns; list; list = list->next)
 	    if (gtk_tree_view_column_get_visible (GTK_TREE_VIEW_COLUMN (list->data)))
 	      {
-		GTK_TREE_VIEW_COLUMN (list->data)->dirty = TRUE;
 		_gtk_tree_view_column_cell_set_dirty (GTK_TREE_VIEW_COLUMN (list->data), TRUE);
 		break;
 	      }
@@ -8990,7 +9068,7 @@ gtk_tree_view_clamp_column_visible (GtkTreeView       *tree_view,
   if (column == NULL)
     return;
 
-  gtk_widget_get_allocation (column->button, &allocation);
+  gtk_widget_get_allocation (gtk_tree_view_column_get_button (column), &allocation);
   x = allocation.x;
   width = allocation.width;
 
@@ -9354,11 +9432,16 @@ gtk_tree_view_set_column_drag_info (GtkTreeView       *tree_view,
       if (tmp_list->next != NULL)
 	{
           GtkAllocation right_allocation, left_allocation;
+	  GtkWidget    *left_button, *right_button;
 
 	  g_assert (tmp_list->next->data);
 
-          gtk_widget_get_allocation (reorder->right_column->button, &right_allocation);
-          gtk_widget_get_allocation (((GtkTreeViewColumnReorder *)tmp_list->next->data)->left_column->button, &left_allocation);
+	  right_button = gtk_tree_view_column_get_button (reorder->right_column);
+	  left_button  = gtk_tree_view_column_get_button
+	    (((GtkTreeViewColumnReorder *)tmp_list->next->data)->left_column);
+
+          gtk_widget_get_allocation (right_button, &right_allocation);
+          gtk_widget_get_allocation (left_button, &left_allocation);
 	  left = reorder->right_align = (right_allocation.x + right_allocation.width + left_allocation.x) / 2;
 	}
       else
@@ -9379,6 +9462,7 @@ _gtk_tree_view_column_start_drag (GtkTreeView       *tree_view,
   GtkAllocation button_allocation;
   GdkScreen *screen = gtk_widget_get_screen (GTK_WIDGET (tree_view));
   GdkDisplay *display = gdk_screen_get_display (screen);
+  GtkWidget *button;
 
   g_return_if_fail (tree_view->priv->column_drag_info == NULL);
   g_return_if_fail (tree_view->priv->cur_reorder == NULL);
@@ -9388,12 +9472,14 @@ _gtk_tree_view_column_start_drag (GtkTreeView       *tree_view,
   if (tree_view->priv->column_drag_info == NULL)
     return;
 
+  button = gtk_tree_view_column_get_button (column);
+
   if (tree_view->priv->drag_window == NULL)
     {
       GdkWindowAttr attributes;
       guint attributes_mask;
 
-      gtk_widget_get_allocation (column->button, &button_allocation);
+      gtk_widget_get_allocation (button, &button_allocation);
 
       attributes.window_type = GDK_WINDOW_CHILD;
       attributes.wclass = GDK_INPUT_OUTPUT;
@@ -9414,17 +9500,17 @@ _gtk_tree_view_column_start_drag (GtkTreeView       *tree_view,
   gdk_display_pointer_ungrab (display, GDK_CURRENT_TIME);
   gdk_display_keyboard_ungrab (display, GDK_CURRENT_TIME);
 
-  gtk_grab_remove (column->button);
+  gtk_grab_remove (button);
 
   send_event = gdk_event_new (GDK_LEAVE_NOTIFY);
   send_event->crossing.send_event = TRUE;
-  send_event->crossing.window = g_object_ref (gtk_button_get_event_window (GTK_BUTTON (column->button)));
+  send_event->crossing.window = g_object_ref (gtk_button_get_event_window (GTK_BUTTON (button)));
   send_event->crossing.subwindow = NULL;
   send_event->crossing.detail = GDK_NOTIFY_ANCESTOR;
   send_event->crossing.time = GDK_CURRENT_TIME;
   gdk_event_set_device (send_event, device);
 
-  gtk_propagate_event (column->button, send_event);
+  gtk_propagate_event (button, send_event);
   gdk_event_free (send_event);
 
   send_event = gdk_event_new (GDK_BUTTON_RELEASE);
@@ -9440,22 +9526,22 @@ _gtk_tree_view_column_start_drag (GtkTreeView       *tree_view,
   send_event->button.y_root = 0;
   gdk_event_set_device (send_event, device);
 
-  gtk_propagate_event (column->button, send_event);
+  gtk_propagate_event (button, send_event);
   gdk_event_free (send_event);
 
   /* Kids, don't try this at home */
-  g_object_ref (column->button);
-  gtk_container_remove (GTK_CONTAINER (tree_view), column->button);
-  gtk_widget_set_parent_window (column->button, tree_view->priv->drag_window);
-  gtk_widget_set_parent (column->button, GTK_WIDGET (tree_view));
-  g_object_unref (column->button);
+  g_object_ref (button);
+  gtk_container_remove (GTK_CONTAINER (tree_view), button);
+  gtk_widget_set_parent_window (button, tree_view->priv->drag_window);
+  gtk_widget_set_parent (button, GTK_WIDGET (tree_view));
+  g_object_unref (button);
 
-  gtk_widget_get_allocation (column->button, &button_allocation);
+  gtk_widget_get_allocation (button, &button_allocation);
   tree_view->priv->drag_column_x = button_allocation.x;
   allocation = button_allocation;
   allocation.x = 0;
-  gtk_widget_size_allocate (column->button, &allocation);
-  gtk_widget_set_parent_window (column->button, tree_view->priv->drag_window);
+  gtk_widget_size_allocate (button, &allocation);
+  gtk_widget_set_parent_window (button, tree_view->priv->drag_window);
 
   tree_view->priv->drag_column = column;
   gdk_window_show (tree_view->priv->drag_window);
@@ -10527,12 +10613,14 @@ gtk_tree_view_real_start_interactive_search (GtkTreeView *tree_view,
   for (list = tree_view->priv->columns; list; list = list->next)
     {
       GtkTreeViewColumn *column;
+      GtkWidget         *button;
 
       column = list->data;
       if (!gtk_tree_view_column_get_visible (column))
 	continue;
 
-      if (gtk_widget_has_focus (column->button))
+      button = gtk_tree_view_column_get_button (column);
+      if (gtk_widget_has_focus (button))
 	{
 	  found_focus = TRUE;
 	  break;
@@ -10613,14 +10701,14 @@ gtk_tree_view_new_column_width (GtkTreeView *tree_view,
    */
   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 (column->button, &allocation);
+  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 (column->button, &button_req, NULL);
+      gtk_widget_get_preferred_size (gtk_tree_view_column_get_button (column), &button_req, NULL);
       width = MAX (button_req.width, width);
     }
   else
@@ -10737,8 +10825,10 @@ gtk_tree_view_adjustment_changed (GtkAdjustment *adjustment,
 	      GList *list;
 	      GtkTreeViewChild *child = NULL;
               GtkCellEditable *edit_widget;
+	      GtkCellArea *area;
 
-              edit_widget = gtk_cell_area_get_edit_widget (tree_view->priv->edited_column->cell_area);
+	      area        = gtk_cell_layout_get_area (GTK_CELL_LAYOUT (tree_view->priv->edited_column));
+              edit_widget = gtk_cell_area_get_edit_widget (area);
               if (GTK_IS_WIDGET (edit_widget))
                 {
                   adjust_allocation (GTK_WIDGET (edit_widget), 0, dy);
@@ -11149,6 +11239,7 @@ gtk_tree_view_set_headers_visible (GtkTreeView *tree_view,
   GList *list;
   GtkTreeViewColumn *column;
   GtkAllocation allocation;
+  GtkWidget *button;
 
   g_return_if_fail (GTK_IS_TREE_VIEW (tree_view));
 
@@ -11182,7 +11273,8 @@ gtk_tree_view_set_headers_visible (GtkTreeView *tree_view,
 	  for (list = tree_view->priv->columns; list; list = list->next)
 	    {
 	      column = list->data;
-	      gtk_widget_unmap (column->button);
+	      button = gtk_tree_view_column_get_button (column);
+	      gtk_widget_unmap (button);
 	    }
 	  gdk_window_hide (tree_view->priv->header_window);
 	}
@@ -11347,7 +11439,7 @@ gtk_tree_view_append_column (GtkTreeView       *tree_view,
 {
   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 (column->tree_view == NULL, -1);
+  g_return_val_if_fail (gtk_tree_view_column_get_tree_view (column) == NULL, -1);
 
   return gtk_tree_view_insert_column (tree_view, column, -1);
 }
@@ -11368,7 +11460,7 @@ gtk_tree_view_remove_column (GtkTreeView       *tree_view,
 {
   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 (column->tree_view == GTK_WIDGET (tree_view), -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;
@@ -11440,7 +11532,7 @@ gtk_tree_view_insert_column (GtkTreeView       *tree_view,
 {
   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 (column->tree_view == NULL, -1);
+  g_return_val_if_fail (gtk_tree_view_column_get_tree_view (column) == NULL, -1);
 
   if (tree_view->priv->fixed_height_mode)
     g_return_val_if_fail (gtk_tree_view_column_get_sizing (column)
@@ -12878,7 +12970,8 @@ gtk_tree_view_set_cursor_on_cell (GtkTreeView       *tree_view,
 
   /* cancel the current editing, if it exists */
   if (tree_view->priv->edited_column &&
-      gtk_cell_area_get_edit_widget (tree_view->priv->edited_column->cell_area))
+      gtk_cell_area_get_edit_widget
+      (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);
@@ -13091,7 +13184,7 @@ gtk_tree_view_get_cell_area (GtkTreeView        *tree_view,
   g_return_if_fail (GTK_IS_TREE_VIEW (tree_view));
   g_return_if_fail (column == NULL || GTK_IS_TREE_VIEW_COLUMN (column));
   g_return_if_fail (rect != NULL);
-  g_return_if_fail (!column || column->tree_view == (GtkWidget *) tree_view);
+  g_return_if_fail (!column || gtk_tree_view_column_get_tree_view (column) == (GtkWidget *) tree_view);
   g_return_if_fail (gtk_widget_get_realized (GTK_WIDGET (tree_view)));
 
   gtk_widget_style_get (GTK_WIDGET (tree_view),
@@ -13106,7 +13199,7 @@ gtk_tree_view_get_cell_area (GtkTreeView        *tree_view,
 
   if (column)
     {
-      gtk_widget_get_allocation (column->button, &allocation);
+      gtk_widget_get_allocation (gtk_tree_view_column_get_button (column), &allocation);
       rect->x = allocation.x + horizontal_separator/2;
       rect->width = allocation.width - horizontal_separator;
     }
@@ -14908,8 +15001,8 @@ gtk_tree_view_start_editing (GtkTreeView *tree_view,
 			       focus_column,
 			       &cell_area);
 
-  if (gtk_cell_area_activate (focus_column->cell_area,
-                              focus_column->cell_area_context,
+  if (gtk_cell_area_activate (gtk_cell_layout_get_area (GTK_CELL_LAYOUT (focus_column)),
+                              _gtk_tree_view_column_get_context (focus_column),
                               GTK_WIDGET (tree_view),
                               &cell_area,
                               flags))
@@ -14975,7 +15068,7 @@ gtk_tree_view_stop_editing (GtkTreeView *tree_view,
    */
 
   column = tree_view->priv->edited_column;
-  gtk_cell_area_stop_editing (column->cell_area, cancel_editing);
+  gtk_cell_area_stop_editing (gtk_cell_layout_get_area (GTK_CELL_LAYOUT (column)), cancel_editing);
   tree_view->priv->edited_column = NULL;
 }
 
diff --git a/gtk/gtktreeviewcolumn.c b/gtk/gtktreeviewcolumn.c
index 363082c..e74e937 100644
--- a/gtk/gtktreeviewcolumn.c
+++ b/gtk/gtktreeviewcolumn.c
@@ -56,34 +56,6 @@
  */
 
 
-enum
-{
-  PROP_0,
-  PROP_VISIBLE,
-  PROP_RESIZABLE,
-  PROP_WIDTH,
-  PROP_SPACING,
-  PROP_SIZING,
-  PROP_FIXED_WIDTH,
-  PROP_MIN_WIDTH,
-  PROP_MAX_WIDTH,
-  PROP_TITLE,
-  PROP_EXPAND,
-  PROP_CLICKABLE,
-  PROP_WIDGET,
-  PROP_ALIGNMENT,
-  PROP_REORDERABLE,
-  PROP_SORT_INDICATOR,
-  PROP_SORT_ORDER,
-  PROP_SORT_COLUMN_ID
-};
-
-enum
-{
-  CLICKED,
-  LAST_SIGNAL
-};
-
 /* Type methods */
 static void gtk_tree_view_column_cell_layout_init              (GtkCellLayoutIface      *iface);
 
@@ -146,6 +118,87 @@ static void gtk_tree_view_column_set_attributesv               (GtkTreeViewColum
 /* GtkBuildable implementation */
 static void gtk_tree_view_column_buildable_init                 (GtkBuildableIface     *iface);
 
+
+struct _GtkTreeViewColumnPrivate 
+{
+  GtkWidget *tree_view;
+  GtkWidget *button;
+  GtkWidget *child;
+  GtkWidget *arrow;
+  GtkWidget *alignment;
+  GdkWindow *window;
+  gfloat xalign;
+  gulong property_changed_signal;
+
+  /* Sizing fields */
+  /* see gtk+/doc/tree-column-sizing.txt for more information on them */
+  GtkTreeViewColumnSizing column_type;
+  gint requested_width;
+  gint resized_width;
+  gint width;
+  gint fixed_width;
+  gint min_width;
+  gint max_width;
+
+  /* dragging columns */
+  gint drag_x;
+  gint drag_y;
+
+  gchar *title;
+
+  /* Sorting */
+  gulong      sort_clicked_signal;
+  gulong      sort_column_changed_signal;
+  gint        sort_column_id;
+  GtkSortType sort_order;
+
+  /* Cell area */
+  GtkCellArea        *cell_area;
+  GtkCellAreaContext *cell_area_context;
+  gulong              add_editable_signal;
+  gulong              remove_editable_signal;
+  gulong              context_changed_signal;
+
+  /* Flags */
+  guint visible             : 1;
+  guint resizable           : 1;
+  guint clickable           : 1;
+  guint dirty               : 1;
+  guint show_sort_indicator : 1;
+  guint maybe_reordered     : 1;
+  guint reorderable         : 1;
+  guint use_resized_width   : 1;
+  guint expand              : 1;
+};
+
+enum
+{
+  PROP_0,
+  PROP_VISIBLE,
+  PROP_RESIZABLE,
+  PROP_WIDTH,
+  PROP_SPACING,
+  PROP_SIZING,
+  PROP_FIXED_WIDTH,
+  PROP_MIN_WIDTH,
+  PROP_MAX_WIDTH,
+  PROP_TITLE,
+  PROP_EXPAND,
+  PROP_CLICKABLE,
+  PROP_WIDGET,
+  PROP_ALIGNMENT,
+  PROP_REORDERABLE,
+  PROP_SORT_INDICATOR,
+  PROP_SORT_ORDER,
+  PROP_SORT_COLUMN_ID
+};
+
+enum
+{
+  CLICKED,
+  LAST_SIGNAL
+};
+
 static guint tree_column_signals[LAST_SIGNAL] = { 0 };
 
 G_DEFINE_TYPE_WITH_CODE (GtkTreeViewColumn, gtk_tree_view_column, G_TYPE_INITIALLY_UNOWNED,
@@ -336,6 +389,8 @@ gtk_tree_view_column_class_init (GtkTreeViewColumnClass *class)
                                                      G_MAXINT,
                                                      -1,
                                                      GTK_PARAM_READWRITE));
+
+  g_type_class_add_private (class, sizeof (GtkTreeViewColumnPrivate));
 }
 
 static void
@@ -355,37 +410,44 @@ gtk_tree_view_column_cell_layout_init (GtkCellLayoutIface *iface)
 static void
 gtk_tree_view_column_init (GtkTreeViewColumn *tree_column)
 {
-  tree_column->button = NULL;
-  tree_column->xalign = 0.0;
-  tree_column->width = 0;
-  tree_column->requested_width = -1;
-  tree_column->min_width = -1;
-  tree_column->max_width = -1;
-  tree_column->resized_width = 0;
-  tree_column->column_type = GTK_TREE_VIEW_COLUMN_GROW_ONLY;
-  tree_column->visible = TRUE;
-  tree_column->resizable = FALSE;
-  tree_column->expand = FALSE;
-  tree_column->clickable = FALSE;
-  tree_column->dirty = TRUE;
-  tree_column->sort_order = GTK_SORT_ASCENDING;
-  tree_column->show_sort_indicator = FALSE;
-  tree_column->property_changed_signal = 0;
-  tree_column->sort_clicked_signal = 0;
-  tree_column->sort_column_changed_signal = 0;
-  tree_column->sort_column_id = -1;
-  tree_column->reorderable = FALSE;
-  tree_column->maybe_reordered = FALSE;
-  tree_column->fixed_width = 1;
-  tree_column->use_resized_width = FALSE;
-  tree_column->title = g_strdup ("");
-
-  tree_column->cell_area = gtk_cell_area_box_new ();
-  gtk_cell_area_set_style_detail (tree_column->cell_area, "treeview");
-  tree_column->cell_area_context = gtk_cell_area_create_context (tree_column->cell_area);
-
-  tree_column->context_changed_signal =
-    g_signal_connect (tree_column->cell_area_context, "notify",
+  GtkTreeViewColumnPrivate *priv;
+
+  tree_column->priv = G_TYPE_INSTANCE_GET_PRIVATE (tree_column,
+						   GTK_TYPE_TREE_VIEW_COLUMN,
+						   GtkTreeViewColumnPrivate);
+  priv = tree_column->priv;
+
+  priv->button = NULL;
+  priv->xalign = 0.0;
+  priv->width = 0;
+  priv->requested_width = -1;
+  priv->min_width = -1;
+  priv->max_width = -1;
+  priv->resized_width = 0;
+  priv->column_type = GTK_TREE_VIEW_COLUMN_GROW_ONLY;
+  priv->visible = TRUE;
+  priv->resizable = FALSE;
+  priv->expand = FALSE;
+  priv->clickable = FALSE;
+  priv->dirty = TRUE;
+  priv->sort_order = GTK_SORT_ASCENDING;
+  priv->show_sort_indicator = FALSE;
+  priv->property_changed_signal = 0;
+  priv->sort_clicked_signal = 0;
+  priv->sort_column_changed_signal = 0;
+  priv->sort_column_id = -1;
+  priv->reorderable = FALSE;
+  priv->maybe_reordered = FALSE;
+  priv->fixed_width = 1;
+  priv->use_resized_width = FALSE;
+  priv->title = g_strdup ("");
+
+  priv->cell_area = gtk_cell_area_box_new ();
+  gtk_cell_area_set_style_detail (priv->cell_area, "treeview");
+  priv->cell_area_context = gtk_cell_area_create_context (priv->cell_area);
+
+  priv->context_changed_signal =
+    g_signal_connect (priv->cell_area_context, "notify",
 		      G_CALLBACK (gtk_tree_view_column_context_changed), tree_column);
 
 }
@@ -393,26 +455,30 @@ gtk_tree_view_column_init (GtkTreeViewColumn *tree_column)
 static void
 gtk_tree_view_column_dispose (GObject *object)
 {
-  GtkTreeViewColumn *tree_column = (GtkTreeViewColumn *) object;
+  GtkTreeViewColumn        *tree_column = (GtkTreeViewColumn *) object;
+  GtkTreeViewColumnPrivate *priv        = tree_column->priv;
 
-  if (tree_column->cell_area_context)
-    {
-      g_object_unref (tree_column->cell_area_context);
+  if (priv->cell_area_context)
+    { 
+      g_signal_handler_disconnect (priv->cell_area_context,
+				   priv->context_changed_signal);
+
+      g_object_unref (priv->cell_area_context);
 
-      g_signal_handler_disconnect (tree_column->cell_area_context,
-				   tree_column->context_changed_signal);
-      tree_column->context_changed_signal = 0;
+      priv->cell_area_context = NULL;
+      priv->context_changed_signal = 0;
     }
 
-  if (tree_column->cell_area)
+  if (priv->cell_area)
     {
-      g_object_unref (tree_column->cell_area);
+      g_object_unref (priv->cell_area);
+      priv->cell_area = NULL;
     }
 
-  if (tree_column->child)
+  if (priv->child)
     {
-      g_object_unref (tree_column->child);
-      tree_column->child = NULL;
+      g_object_unref (priv->child);
+      priv->child = NULL;
     }
 
   G_OBJECT_CLASS (gtk_tree_view_column_parent_class)->dispose (object);
@@ -421,9 +487,10 @@ gtk_tree_view_column_dispose (GObject *object)
 static void
 gtk_tree_view_column_finalize (GObject *object)
 {
-  GtkTreeViewColumn *tree_column = (GtkTreeViewColumn *) object;
+  GtkTreeViewColumn        *tree_column = (GtkTreeViewColumn *) object;
+  GtkTreeViewColumnPrivate *priv        = tree_column->priv;
 
-  g_free (tree_column->title);
+  g_free (priv->title);
 
   G_OBJECT_CLASS (gtk_tree_view_column_parent_class)->finalize (object);
 }
@@ -634,12 +701,10 @@ gtk_tree_view_column_get_property (GObject         *object,
 static GtkCellArea *
 gtk_tree_view_column_cell_layout_get_area (GtkCellLayout   *cell_layout)
 {
-  GtkTreeViewColumn *column;
+  GtkTreeViewColumn        *column = GTK_TREE_VIEW_COLUMN (cell_layout);
+  GtkTreeViewColumnPrivate *priv   = column->priv;
 
-  g_return_val_if_fail (GTK_IS_TREE_VIEW_COLUMN (cell_layout), NULL);
-  column = GTK_TREE_VIEW_COLUMN (cell_layout);
-
-  return column->cell_area;
+  return priv->cell_area;
 }
 
 /* Button handling code
@@ -647,42 +712,43 @@ gtk_tree_view_column_cell_layout_get_area (GtkCellLayout   *cell_layout)
 static void
 gtk_tree_view_column_create_button (GtkTreeViewColumn *tree_column)
 {
+  GtkTreeViewColumnPrivate *priv = tree_column->priv;
   GtkTreeView *tree_view;
   GtkWidget *child;
   GtkWidget *hbox;
 
-  tree_view = (GtkTreeView *) tree_column->tree_view;
+  tree_view = (GtkTreeView *) priv->tree_view;
 
   g_return_if_fail (GTK_IS_TREE_VIEW (tree_view));
-  g_return_if_fail (tree_column->button == NULL);
+  g_return_if_fail (priv->button == NULL);
 
   gtk_widget_push_composite_child ();
-  tree_column->button = gtk_button_new ();
-  gtk_widget_add_events (tree_column->button, GDK_POINTER_MOTION_MASK);
+  priv->button = gtk_button_new ();
+  gtk_widget_add_events (priv->button, GDK_POINTER_MOTION_MASK);
   gtk_widget_pop_composite_child ();
 
   /* make sure we own a reference to it as well. */
   if (tree_view->priv->header_window)
-    gtk_widget_set_parent_window (tree_column->button, tree_view->priv->header_window);
-  gtk_widget_set_parent (tree_column->button, GTK_WIDGET (tree_view));
+    gtk_widget_set_parent_window (priv->button, tree_view->priv->header_window);
+  gtk_widget_set_parent (priv->button, GTK_WIDGET (tree_view));
 
-  g_signal_connect (tree_column->button, "event",
+  g_signal_connect (priv->button, "event",
 		    G_CALLBACK (gtk_tree_view_column_button_event),
 		    tree_column);
-  g_signal_connect (tree_column->button, "clicked",
+  g_signal_connect (priv->button, "clicked",
 		    G_CALLBACK (gtk_tree_view_column_button_clicked),
 		    tree_column);
 
-  tree_column->alignment = gtk_alignment_new (tree_column->xalign, 0.5, 0.0, 0.0);
+  priv->alignment = gtk_alignment_new (priv->xalign, 0.5, 0.0, 0.0);
 
   hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2);
-  tree_column->arrow = gtk_arrow_new (GTK_ARROW_DOWN, GTK_SHADOW_IN);
+  priv->arrow = gtk_arrow_new (GTK_ARROW_DOWN, GTK_SHADOW_IN);
 
-  if (tree_column->child)
-    child = tree_column->child;
+  if (priv->child)
+    child = priv->child;
   else
     {
-      child = gtk_label_new (tree_column->title);
+      child = gtk_label_new (priv->title);
       gtk_widget_show (child);
     }
 
@@ -690,24 +756,25 @@ gtk_tree_view_column_create_button (GtkTreeViewColumn *tree_column)
 		    G_CALLBACK (gtk_tree_view_column_mnemonic_activate),
 		    tree_column);
 
-  if (tree_column->xalign <= 0.5)
-    gtk_box_pack_end (GTK_BOX (hbox), tree_column->arrow, FALSE, FALSE, 0);
+  if (priv->xalign <= 0.5)
+    gtk_box_pack_end (GTK_BOX (hbox), priv->arrow, FALSE, FALSE, 0);
   else
-    gtk_box_pack_start (GTK_BOX (hbox), tree_column->arrow, FALSE, FALSE, 0);
+    gtk_box_pack_start (GTK_BOX (hbox), priv->arrow, FALSE, FALSE, 0);
 
-  gtk_box_pack_start (GTK_BOX (hbox), tree_column->alignment, TRUE, TRUE, 0);
+  gtk_box_pack_start (GTK_BOX (hbox), priv->alignment, TRUE, TRUE, 0);
         
-  gtk_container_add (GTK_CONTAINER (tree_column->alignment), child);
-  gtk_container_add (GTK_CONTAINER (tree_column->button), hbox);
+  gtk_container_add (GTK_CONTAINER (priv->alignment), child);
+  gtk_container_add (GTK_CONTAINER (priv->button), hbox);
 
   gtk_widget_show (hbox);
-  gtk_widget_show (tree_column->alignment);
+  gtk_widget_show (priv->alignment);
   gtk_tree_view_column_update_button (tree_column);
 }
 
 static void 
 gtk_tree_view_column_update_button (GtkTreeViewColumn *tree_column)
 {
+  GtkTreeViewColumnPrivate *priv = tree_column->priv;
   gint sort_column_id = -1;
   GtkWidget *hbox;
   GtkWidget *alignment;
@@ -716,38 +783,38 @@ gtk_tree_view_column_update_button (GtkTreeViewColumn *tree_column)
   GtkArrowType arrow_type = GTK_ARROW_NONE;
   GtkTreeModel *model;
 
-  if (tree_column->tree_view)
-    model = gtk_tree_view_get_model (GTK_TREE_VIEW (tree_column->tree_view));
+  if (priv->tree_view)
+    model = gtk_tree_view_get_model (GTK_TREE_VIEW (priv->tree_view));
   else
     model = NULL;
 
   /* Create a button if necessary */
-  if (tree_column->visible &&
-      tree_column->button == NULL &&
-      tree_column->tree_view &&
-      gtk_widget_get_realized (tree_column->tree_view))
+  if (priv->visible &&
+      priv->button == NULL &&
+      priv->tree_view &&
+      gtk_widget_get_realized (priv->tree_view))
     gtk_tree_view_column_create_button (tree_column);
   
-  if (! tree_column->button)
+  if (! priv->button)
     return;
 
-  hbox = gtk_bin_get_child (GTK_BIN (tree_column->button));
-  alignment = tree_column->alignment;
-  arrow = tree_column->arrow;
+  hbox = gtk_bin_get_child (GTK_BIN (priv->button));
+  alignment = priv->alignment;
+  arrow = priv->arrow;
   current_child = gtk_bin_get_child (GTK_BIN (alignment));
 
   /* Set up the actual button */
-  gtk_alignment_set (GTK_ALIGNMENT (alignment), tree_column->xalign,
+  gtk_alignment_set (GTK_ALIGNMENT (alignment), priv->xalign,
 		     0.5, 0.0, 0.0);
       
-  if (tree_column->child)
+  if (priv->child)
     {
-      if (current_child != tree_column->child)
+      if (current_child != priv->child)
 	{
 	  gtk_container_remove (GTK_CONTAINER (alignment),
 				current_child);
 	  gtk_container_add (GTK_CONTAINER (alignment),
-			     tree_column->child);
+			     priv->child);
 	}
     }
   else 
@@ -762,9 +829,9 @@ gtk_tree_view_column_update_button (GtkTreeViewColumn *tree_column)
 
       g_return_if_fail (GTK_IS_LABEL (current_child));
 
-      if (tree_column->title)
+      if (priv->title)
 	gtk_label_set_text_with_mnemonic (GTK_LABEL (current_child),
-					  tree_column->title);
+					  priv->title);
       else
 	gtk_label_set_text_with_mnemonic (GTK_LABEL (current_child),
 					  "");
@@ -775,15 +842,15 @@ gtk_tree_view_column_update_button (GtkTreeViewColumn *tree_column)
 					  &sort_column_id,
 					  NULL);
 
-  if (tree_column->show_sort_indicator)
+  if (priv->show_sort_indicator)
     {
       gboolean alternative;
 
-      g_object_get (gtk_widget_get_settings (tree_column->tree_view),
+      g_object_get (gtk_widget_get_settings (priv->tree_view),
 		    "gtk-alternative-sort-arrows", &alternative,
 		    NULL);
 
-      switch (tree_column->sort_order)
+      switch (priv->sort_order)
         {
 	  case GTK_SORT_ASCENDING:
 	    arrow_type = alternative ? GTK_ARROW_UP : GTK_ARROW_DOWN;
@@ -810,7 +877,7 @@ gtk_tree_view_column_update_button (GtkTreeViewColumn *tree_column)
   g_object_ref (arrow);
   gtk_container_remove (GTK_CONTAINER (hbox), arrow);
 
-  if (tree_column->xalign <= 0.5)
+  if (priv->xalign <= 0.5)
     {
       gtk_box_pack_end (GTK_BOX (hbox), arrow, FALSE, FALSE, 0);
     }
@@ -822,52 +889,52 @@ gtk_tree_view_column_update_button (GtkTreeViewColumn *tree_column)
     }
   g_object_unref (arrow);
 
-  if (tree_column->show_sort_indicator
-      || (GTK_IS_TREE_SORTABLE (model) && tree_column->sort_column_id >= 0))
+  if (priv->show_sort_indicator
+      || (GTK_IS_TREE_SORTABLE (model) && priv->sort_column_id >= 0))
     gtk_widget_show (arrow);
   else
     gtk_widget_hide (arrow);
 
   /* It's always safe to hide the button.  It isn't always safe to show it, as
    * if you show it before it's realized, it'll get the wrong window. */
-  if (tree_column->button &&
-      tree_column->tree_view != NULL &&
-      gtk_widget_get_realized (tree_column->tree_view))
+  if (priv->button &&
+      priv->tree_view != NULL &&
+      gtk_widget_get_realized (priv->tree_view))
     {
-      if (tree_column->visible)
+      if (priv->visible)
 	{
-	  gtk_widget_show_now (tree_column->button);
-	  if (tree_column->window)
+	  gtk_widget_show_now (priv->button);
+	  if (priv->window)
 	    {
-	      if (tree_column->resizable)
+	      if (priv->resizable)
 		{
-		  gdk_window_show (tree_column->window);
-		  gdk_window_raise (tree_column->window);
+		  gdk_window_show (priv->window);
+		  gdk_window_raise (priv->window);
 		}
 	      else
 		{
-		  gdk_window_hide (tree_column->window);
+		  gdk_window_hide (priv->window);
 		}
 	    }
 	}
       else
 	{
-	  gtk_widget_hide (tree_column->button);
-	  if (tree_column->window)
-	    gdk_window_hide (tree_column->window);
+	  gtk_widget_hide (priv->button);
+	  if (priv->window)
+	    gdk_window_hide (priv->window);
 	}
     }
   
-  if (tree_column->reorderable || tree_column->clickable)
+  if (priv->reorderable || priv->clickable)
     {
-      gtk_widget_set_can_focus (tree_column->button, TRUE);
+      gtk_widget_set_can_focus (priv->button, TRUE);
     }
   else
     {
-      gtk_widget_set_can_focus (tree_column->button, FALSE);
-      if (gtk_widget_has_focus (tree_column->button))
+      gtk_widget_set_can_focus (priv->button, FALSE);
+      if (gtk_widget_has_focus (priv->button))
 	{
-	  GtkWidget *toplevel = gtk_widget_get_toplevel (tree_column->tree_view);
+	  GtkWidget *toplevel = gtk_widget_get_toplevel (priv->tree_view);
 	  if (gtk_widget_is_toplevel (toplevel))
 	    {
 	      gtk_window_set_focus (GTK_WINDOW (toplevel), NULL);
@@ -877,8 +944,8 @@ gtk_tree_view_column_update_button (GtkTreeViewColumn *tree_column)
   /* Queue a resize on the assumption that we always want to catch all changes
    * and columns don't change all that often.
    */
-  if (gtk_widget_get_realized (tree_column->tree_view))
-     gtk_widget_queue_resize (tree_column->tree_view);
+  if (gtk_widget_get_realized (priv->tree_view))
+     gtk_widget_queue_resize (priv->tree_view);
 
 }
 
@@ -890,40 +957,42 @@ gtk_tree_view_column_button_event (GtkWidget *widget,
 				   GdkEvent  *event,
 				   gpointer   data)
 {
-  GtkTreeViewColumn *column = (GtkTreeViewColumn *) data;
+  GtkTreeViewColumn        *column = (GtkTreeViewColumn *) data;
+  GtkTreeViewColumnPrivate *priv   = column->priv;
 
   g_return_val_if_fail (event != NULL, FALSE);
 
   if (event->type == GDK_BUTTON_PRESS &&
-      column->reorderable &&
+      priv->reorderable &&
       ((GdkEventButton *)event)->button == 1)
     {
-      column->maybe_reordered = TRUE;
+      priv->maybe_reordered = TRUE;
       gdk_window_get_pointer (gtk_button_get_event_window (GTK_BUTTON (widget)),
-			      &column->drag_x,
-			      &column->drag_y,
+			      &priv->drag_x,
+			      &priv->drag_y,
 			      NULL);
       gtk_widget_grab_focus (widget);
     }
 
   if (event->type == GDK_BUTTON_RELEASE ||
       event->type == GDK_LEAVE_NOTIFY)
-    column->maybe_reordered = FALSE;
+    priv->maybe_reordered = FALSE;
   
   if (event->type == GDK_MOTION_NOTIFY &&
-      column->maybe_reordered &&
+      priv->maybe_reordered &&
       (gtk_drag_check_threshold (widget,
-				 column->drag_x,
-				 column->drag_y,
+				 priv->drag_x,
+				 priv->drag_y,
 				 (gint) ((GdkEventMotion *)event)->x,
 				 (gint) ((GdkEventMotion *)event)->y)))
     {
-      column->maybe_reordered = FALSE;
-      _gtk_tree_view_column_start_drag (GTK_TREE_VIEW (column->tree_view), column,
+      priv->maybe_reordered = FALSE;
+      _gtk_tree_view_column_start_drag (GTK_TREE_VIEW (priv->tree_view), column,
                                         event->motion.device);
       return TRUE;
     }
-  if (column->clickable == FALSE)
+
+  if (priv->clickable == FALSE)
     {
       switch (event->type)
 	{
@@ -954,17 +1023,20 @@ gtk_tree_view_column_mnemonic_activate (GtkWidget *widget,
 					gboolean   group_cycling,
 					gpointer   data)
 {
-  GtkTreeViewColumn *column = (GtkTreeViewColumn *)data;
+  GtkTreeViewColumn        *column = (GtkTreeViewColumn *)data;
+  GtkTreeViewColumnPrivate *priv   = column->priv;
 
   g_return_val_if_fail (GTK_IS_TREE_VIEW_COLUMN (column), FALSE);
 
-  GTK_TREE_VIEW (column->tree_view)->priv->focus_column = column;
-  if (column->clickable)
-    gtk_button_clicked (GTK_BUTTON (column->button));
-  else if (gtk_widget_get_can_focus (column->button))
-    gtk_widget_grab_focus (column->button);
+  /* XXX Direct access to treeview */
+  GTK_TREE_VIEW (priv->tree_view)->priv->focus_column = column;
+
+  if (priv->clickable)
+    gtk_button_clicked (GTK_BUTTON (priv->button));
+  else if (gtk_widget_get_can_focus (priv->button))
+    gtk_widget_grab_focus (priv->button);
   else
-    gtk_widget_grab_focus (column->tree_view);
+    gtk_widget_grab_focus (priv->tree_view);
 
   return TRUE;
 }
@@ -973,6 +1045,7 @@ static void
 gtk_tree_view_model_sort_column_changed (GtkTreeSortable   *sortable,
 					 GtkTreeViewColumn *column)
 {
+  GtkTreeViewColumnPrivate *priv = column->priv;
   gint sort_column_id;
   GtkSortType order;
 
@@ -980,7 +1053,7 @@ gtk_tree_view_model_sort_column_changed (GtkTreeSortable   *sortable,
 					    &sort_column_id,
 					    &order))
     {
-      if (sort_column_id == column->sort_column_id)
+      if (sort_column_id == priv->sort_column_id)
 	{
 	  gtk_tree_view_column_set_sort_indicator (column, TRUE);
 	  gtk_tree_view_column_set_sort_order (column, order);
@@ -1000,74 +1073,80 @@ static void
 gtk_tree_view_column_sort (GtkTreeViewColumn *tree_column,
 			   gpointer           data)
 {
+  GtkTreeViewColumnPrivate *priv = tree_column->priv;
+  GtkTreeModel *model;
+  GtkTreeSortable *sortable;
   gint sort_column_id;
   GtkSortType order;
   gboolean has_sort_column;
   gboolean has_default_sort_func;
 
-  g_return_if_fail (tree_column->tree_view != NULL);
+  g_return_if_fail (priv->tree_view != NULL);
+
+  model    = gtk_tree_view_get_model (GTK_TREE_VIEW (priv->tree_view));
+  sortable = GTK_TREE_SORTABLE (model);
 
   has_sort_column =
-    gtk_tree_sortable_get_sort_column_id (GTK_TREE_SORTABLE (GTK_TREE_VIEW (tree_column->tree_view)->priv->model),
+    gtk_tree_sortable_get_sort_column_id (sortable,
 					  &sort_column_id,
 					  &order);
   has_default_sort_func =
-    gtk_tree_sortable_has_default_sort_func (GTK_TREE_SORTABLE (GTK_TREE_VIEW (tree_column->tree_view)->priv->model));
+    gtk_tree_sortable_has_default_sort_func (sortable);
 
   if (has_sort_column &&
-      sort_column_id == tree_column->sort_column_id)
+      sort_column_id == priv->sort_column_id)
     {
       if (order == GTK_SORT_ASCENDING)
-	gtk_tree_sortable_set_sort_column_id (GTK_TREE_SORTABLE (GTK_TREE_VIEW (tree_column->tree_view)->priv->model),
-					      tree_column->sort_column_id,
+	gtk_tree_sortable_set_sort_column_id (sortable,
+					      priv->sort_column_id,
 					      GTK_SORT_DESCENDING);
       else if (order == GTK_SORT_DESCENDING && has_default_sort_func)
-	gtk_tree_sortable_set_sort_column_id (GTK_TREE_SORTABLE (GTK_TREE_VIEW (tree_column->tree_view)->priv->model),
+	gtk_tree_sortable_set_sort_column_id (sortable,
 					      GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID,
 					      GTK_SORT_ASCENDING);
       else
-	gtk_tree_sortable_set_sort_column_id (GTK_TREE_SORTABLE (GTK_TREE_VIEW (tree_column->tree_view)->priv->model),
-					      tree_column->sort_column_id,
+	gtk_tree_sortable_set_sort_column_id (sortable,
+					      priv->sort_column_id,
 					      GTK_SORT_ASCENDING);
     }
   else
     {
-      gtk_tree_sortable_set_sort_column_id (GTK_TREE_SORTABLE (GTK_TREE_VIEW (tree_column->tree_view)->priv->model),
-					    tree_column->sort_column_id,
+      gtk_tree_sortable_set_sort_column_id (sortable,
+					    priv->sort_column_id,
 					    GTK_SORT_ASCENDING);
     }
 }
 
-
 static void
 gtk_tree_view_column_setup_sort_column_id_callback (GtkTreeViewColumn *tree_column)
 {
+  GtkTreeViewColumnPrivate *priv = tree_column->priv;
   GtkTreeModel *model;
 
-  if (tree_column->tree_view == NULL)
+  if (priv->tree_view == NULL)
     return;
 
-  model = gtk_tree_view_get_model (GTK_TREE_VIEW (tree_column->tree_view));
+  model = gtk_tree_view_get_model (GTK_TREE_VIEW (priv->tree_view));
 
   if (model == NULL)
     return;
 
   if (GTK_IS_TREE_SORTABLE (model) &&
-      tree_column->sort_column_id != -1)
+      priv->sort_column_id != -1)
     {
       gint real_sort_column_id;
       GtkSortType real_order;
 
-      if (tree_column->sort_column_changed_signal == 0)
-        tree_column->sort_column_changed_signal =
+      if (priv->sort_column_changed_signal == 0)
+        priv->sort_column_changed_signal =
 	  g_signal_connect (model, "sort-column-changed",
 			    G_CALLBACK (gtk_tree_view_model_sort_column_changed),
 			    tree_column);
-      
+
       if (gtk_tree_sortable_get_sort_column_id (GTK_TREE_SORTABLE (model),
 						&real_sort_column_id,
 						&real_order) &&
-	  (real_sort_column_id == tree_column->sort_column_id))
+	  (real_sort_column_id == priv->sort_column_id))
 	{
 	  gtk_tree_view_column_set_sort_indicator (tree_column, TRUE);
 	  gtk_tree_view_column_set_sort_order (tree_column, real_order);
@@ -1105,12 +1184,13 @@ gtk_tree_view_column_add_editable_callback (GtkCellArea       *area,
                                             const gchar       *path_string,
                                             gpointer           user_data)
 {
-  GtkTreePath *path;
-  GtkTreeViewColumn *column = user_data;
+  GtkTreeViewColumn        *column = user_data;
+  GtkTreeViewColumnPrivate *priv   = column->priv;
+  GtkTreePath              *path;
 
   path = gtk_tree_path_new_from_string (path_string);
 
-  _gtk_tree_view_add_editable (GTK_TREE_VIEW (column->tree_view),
+  _gtk_tree_view_add_editable (GTK_TREE_VIEW (priv->tree_view),
                                column,
                                path,
                                edit_widget,
@@ -1125,9 +1205,10 @@ gtk_tree_view_column_remove_editable_callback (GtkCellArea     *area,
                                                GtkCellEditable *edit_widget,
                                                gpointer         user_data)
 {
-  GtkTreeViewColumn *column = user_data;
+  GtkTreeViewColumn        *column = user_data;
+  GtkTreeViewColumnPrivate *priv   = column->priv;
 
-  _gtk_tree_view_remove_editable (GTK_TREE_VIEW (column->tree_view),
+  _gtk_tree_view_remove_editable (GTK_TREE_VIEW (priv->tree_view),
                                   column,
                                   edit_widget);
 }
@@ -1135,28 +1216,29 @@ gtk_tree_view_column_remove_editable_callback (GtkCellArea     *area,
 /* Exported Private Functions.
  * These should only be called by gtktreeview.c or gtktreeviewcolumn.c
  */
-
 void
 _gtk_tree_view_column_realize_button (GtkTreeViewColumn *column)
 {
+  GtkTreeViewColumnPrivate *priv = column->priv;
   GtkAllocation allocation;
   GtkTreeView *tree_view;
   GdkWindowAttr attr;
   guint attributes_mask;
   gboolean rtl;
 
-  tree_view = (GtkTreeView *)column->tree_view;
-  rtl = (gtk_widget_get_direction (GTK_WIDGET (tree_view)) == GTK_TEXT_DIR_RTL);
+  tree_view = (GtkTreeView *)priv->tree_view;
+  rtl       = (gtk_widget_get_direction (priv->tree_view) == GTK_TEXT_DIR_RTL);
 
   g_return_if_fail (GTK_IS_TREE_VIEW (tree_view));
-  g_return_if_fail (gtk_widget_get_realized (GTK_WIDGET (tree_view)));
-  g_return_if_fail (tree_view->priv->header_window != NULL);
-  g_return_if_fail (column->button != NULL);
+  g_return_if_fail (gtk_widget_get_realized (priv->tree_view));
+  g_return_if_fail (priv->button != NULL);
 
-  gtk_widget_set_parent_window (column->button, tree_view->priv->header_window);
+  /* XXX Access to GtkTreeView->priv */
+  g_return_if_fail (tree_view->priv->header_window != NULL);
+  gtk_widget_set_parent_window (priv->button, tree_view->priv->header_window);
 
-  if (column->visible)
-    gtk_widget_show (column->button);
+  if (priv->visible)
+    gtk_widget_show (priv->button);
 
   attr.window_type = GDK_WINDOW_CHILD;
   attr.wclass = GDK_INPUT_ONLY;
@@ -1174,11 +1256,11 @@ _gtk_tree_view_column_realize_button (GtkTreeViewColumn *column)
   attr.width = TREE_VIEW_DRAG_WIDTH;
   attr.height = tree_view->priv->header_height;
 
-  gtk_widget_get_allocation (column->button, &allocation);
-  attr.x = (allocation.x + (rtl ? 0 : allocation.width)) - TREE_VIEW_DRAG_WIDTH / 2;
-  column->window = gdk_window_new (tree_view->priv->header_window,
+  gtk_widget_get_allocation (priv->button, &allocation);
+  attr.x       = (allocation.x + (rtl ? 0 : allocation.width)) - TREE_VIEW_DRAG_WIDTH / 2;
+  priv->window = gdk_window_new (tree_view->priv->header_window,
 				   &attr, attributes_mask);
-  gdk_window_set_user_data (column->window, tree_view);
+  gdk_window_set_user_data (priv->window, tree_view);
 
   gtk_tree_view_column_update_button (column);
 
@@ -1188,23 +1270,29 @@ _gtk_tree_view_column_realize_button (GtkTreeViewColumn *column)
 void
 _gtk_tree_view_column_unrealize_button (GtkTreeViewColumn *column)
 {
+  GtkTreeViewColumnPrivate *priv;
+
   g_return_if_fail (column != NULL);
-  g_return_if_fail (column->window != NULL);
 
-  gdk_window_set_user_data (column->window, NULL);
-  gdk_window_destroy (column->window);
-  column->window = NULL;
+  priv = column->priv;
+  g_return_if_fail (priv->window != NULL);
+
+  gdk_window_set_user_data (priv->window, NULL);
+  gdk_window_destroy (priv->window);
+  priv->window = NULL;
 }
 
 void
 _gtk_tree_view_column_unset_model (GtkTreeViewColumn *column,
 				   GtkTreeModel      *old_model)
 {
-  if (column->sort_column_changed_signal)
+  GtkTreeViewColumnPrivate *priv = column->priv;
+
+  if (priv->sort_column_changed_signal)
     {
       g_signal_handler_disconnect (old_model,
-				   column->sort_column_changed_signal);
-      column->sort_column_changed_signal = 0;
+				   priv->sort_column_changed_signal);
+      priv->sort_column_changed_signal = 0;
     }
   gtk_tree_view_column_set_sort_indicator (column, FALSE);
 }
@@ -1213,25 +1301,27 @@ void
 _gtk_tree_view_column_set_tree_view (GtkTreeViewColumn *column,
 				     GtkTreeView       *tree_view)
 {
-  g_assert (column->tree_view == NULL);
+  GtkTreeViewColumnPrivate *priv = column->priv;
+
+  g_assert (priv->tree_view == NULL);
 
-  column->tree_view = GTK_WIDGET (tree_view);
+  priv->tree_view = GTK_WIDGET (tree_view);
   gtk_tree_view_column_create_button (column);
 
-  column->add_editable_signal =
-      g_signal_connect (column->cell_area, "add-editable",
-                        G_CALLBACK (gtk_tree_view_column_add_editable_callback),
-                        column);
-  column->remove_editable_signal =
-      g_signal_connect (column->cell_area, "remove-editable",
-                        G_CALLBACK (gtk_tree_view_column_remove_editable_callback),
-                        column);
-
-  column->property_changed_signal =
-	  g_signal_connect_swapped (tree_view,
-				    "notify::model",
-				    G_CALLBACK (gtk_tree_view_column_setup_sort_column_id_callback),
-				    column);
+  priv->add_editable_signal =
+    g_signal_connect (priv->cell_area, "add-editable",
+		      G_CALLBACK (gtk_tree_view_column_add_editable_callback),
+		      column);
+  priv->remove_editable_signal =
+    g_signal_connect (priv->cell_area, "remove-editable",
+		      G_CALLBACK (gtk_tree_view_column_remove_editable_callback),
+		      column);
+
+  priv->property_changed_signal =
+    g_signal_connect_swapped (tree_view,
+			      "notify::model",
+			      G_CALLBACK (gtk_tree_view_column_setup_sort_column_id_callback),
+			      column);
 
   gtk_tree_view_column_setup_sort_column_id_callback (column);
 }
@@ -1239,34 +1329,37 @@ _gtk_tree_view_column_set_tree_view (GtkTreeViewColumn *column,
 void
 _gtk_tree_view_column_unset_tree_view (GtkTreeViewColumn *column)
 {
-  if (column->tree_view && column->button)
+  GtkTreeViewColumnPrivate *priv = column->priv;
+
+  if (priv->tree_view && priv->button)
     {
-      gtk_container_remove (GTK_CONTAINER (column->tree_view), column->button);
+      gtk_container_remove (GTK_CONTAINER (priv->tree_view), priv->button);
     }
-  if (column->property_changed_signal)
+  if (priv->property_changed_signal)
     {
-      g_signal_handler_disconnect (column->tree_view, column->property_changed_signal);
-      column->property_changed_signal = 0;
+      g_signal_handler_disconnect (priv->tree_view, priv->property_changed_signal);
+      priv->property_changed_signal = 0;
     }
 
-  if (column->sort_column_changed_signal)
+  if (priv->sort_column_changed_signal)
     {
-      g_signal_handler_disconnect (gtk_tree_view_get_model (GTK_TREE_VIEW (column->tree_view)),
-				   column->sort_column_changed_signal);
-      column->sort_column_changed_signal = 0;
+      g_signal_handler_disconnect (gtk_tree_view_get_model (GTK_TREE_VIEW (priv->tree_view)),
+				   priv->sort_column_changed_signal);
+      priv->sort_column_changed_signal = 0;
     }
 
-  column->tree_view = NULL;
-  column->button = NULL;
+  priv->tree_view = NULL;
+  priv->button = NULL;
 }
 
 gboolean
 _gtk_tree_view_column_has_editable_cell (GtkTreeViewColumn *column)
 {
+  GtkTreeViewColumnPrivate *priv = column->priv;
   gboolean ret = FALSE;
   GList *list, *cells;
 
-  cells = gtk_cell_layout_get_cells (GTK_CELL_LAYOUT (column->cell_area));
+  cells = gtk_cell_layout_get_cells (GTK_CELL_LAYOUT (priv->cell_area));
 
   for (list = cells; list; list = list->next)
     {
@@ -1291,7 +1384,9 @@ _gtk_tree_view_column_has_editable_cell (GtkTreeViewColumn *column)
 GtkCellRenderer *
 _gtk_tree_view_column_get_edited_cell (GtkTreeViewColumn *column)
 {
-  return gtk_cell_area_get_edited_cell (column->cell_area);
+  GtkTreeViewColumnPrivate *priv = column->priv;
+
+  return gtk_cell_area_get_edited_cell (priv->cell_area);
 }
 
 /* Public Functions */
@@ -1440,18 +1535,19 @@ gtk_tree_view_column_set_attributesv (GtkTreeViewColumn *tree_column,
 				      GtkCellRenderer   *cell_renderer,
 				      va_list            args)
 {
+  GtkTreeViewColumnPrivate *priv = tree_column->priv;
   gchar *attribute;
   gint column;
 
   attribute = va_arg (args, gchar *);
 
-  gtk_cell_layout_clear_attributes (GTK_CELL_LAYOUT (tree_column->cell_area),
+  gtk_cell_layout_clear_attributes (GTK_CELL_LAYOUT (priv->cell_area),
                                     cell_renderer);
   
   while (attribute != NULL)
     {
       column = va_arg (args, gint);
-      gtk_cell_layout_add_attribute (GTK_CELL_LAYOUT (tree_column->cell_area),
+      gtk_cell_layout_add_attribute (GTK_CELL_LAYOUT (priv->cell_area),
                                      cell_renderer, attribute, column);
       attribute = va_arg (args, gchar *);
     }
@@ -1540,12 +1636,16 @@ void
 gtk_tree_view_column_set_spacing (GtkTreeViewColumn *tree_column,
 				  gint               spacing)
 {
+  GtkTreeViewColumnPrivate *priv;
+
   g_return_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column));
   g_return_if_fail (spacing >= 0);
 
-  gtk_cell_area_box_set_spacing (GTK_CELL_AREA_BOX (tree_column->cell_area),
+  priv = tree_column->priv;
+
+  gtk_cell_area_box_set_spacing (GTK_CELL_AREA_BOX (priv->cell_area),
                                  spacing);
-  if (tree_column->tree_view)
+  if (priv->tree_view)
     _gtk_tree_view_column_cell_set_dirty (tree_column, TRUE);
 }
 
@@ -1560,9 +1660,13 @@ gtk_tree_view_column_set_spacing (GtkTreeViewColumn *tree_column,
 gint
 gtk_tree_view_column_get_spacing (GtkTreeViewColumn *tree_column)
 {
+  GtkTreeViewColumnPrivate *priv;
+
   g_return_val_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column), 0);
 
-  return gtk_cell_area_box_get_spacing (GTK_CELL_AREA_BOX (tree_column->cell_area));
+  priv = tree_column->priv;
+
+  return gtk_cell_area_box_get_spacing (GTK_CELL_AREA_BOX (priv->cell_area));
 }
 
 /* Options for manipulating the columns */
@@ -1578,16 +1682,19 @@ void
 gtk_tree_view_column_set_visible (GtkTreeViewColumn *tree_column,
 				  gboolean           visible)
 {
+  GtkTreeViewColumnPrivate *priv;
+
   g_return_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column));
 
+  priv    = tree_column->priv;
   visible = !! visible;
   
-  if (tree_column->visible == visible)
+  if (priv->visible == visible)
     return;
 
-  tree_column->visible = visible;
+  priv->visible = visible;
 
-  if (tree_column->visible)
+  if (priv->visible)
     _gtk_tree_view_column_cell_set_dirty (tree_column, TRUE);
 
   gtk_tree_view_column_update_button (tree_column);
@@ -1608,7 +1715,7 @@ gtk_tree_view_column_get_visible (GtkTreeViewColumn *tree_column)
 {
   g_return_val_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column), FALSE);
 
-  return tree_column->visible;
+  return tree_column->priv->visible;
 }
 
 /**
@@ -1625,16 +1732,19 @@ void
 gtk_tree_view_column_set_resizable (GtkTreeViewColumn *tree_column,
 				    gboolean           resizable)
 {
+  GtkTreeViewColumnPrivate *priv;
+
   g_return_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column));
 
+  priv      = tree_column->priv;
   resizable = !! resizable;
 
-  if (tree_column->resizable == resizable)
+  if (priv->resizable == resizable)
     return;
 
-  tree_column->resizable = resizable;
+  priv->resizable = resizable;
 
-  if (resizable && tree_column->column_type == GTK_TREE_VIEW_COLUMN_AUTOSIZE)
+  if (resizable && priv->column_type == GTK_TREE_VIEW_COLUMN_AUTOSIZE)
     gtk_tree_view_column_set_sizing (tree_column, GTK_TREE_VIEW_COLUMN_GROW_ONLY);
 
   gtk_tree_view_column_update_button (tree_column);
@@ -1655,7 +1765,7 @@ gtk_tree_view_column_get_resizable (GtkTreeViewColumn *tree_column)
 {
   g_return_val_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column), FALSE);
 
-  return tree_column->resizable;
+  return tree_column->priv->resizable;
 }
 
 
@@ -1670,9 +1780,13 @@ void
 gtk_tree_view_column_set_sizing (GtkTreeViewColumn       *tree_column,
                                  GtkTreeViewColumnSizing  type)
 {
+  GtkTreeViewColumnPrivate *priv;
+
   g_return_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column));
 
-  if (type == tree_column->column_type)
+  priv      = tree_column->priv;
+
+  if (type == priv->column_type)
     return;
 
   if (type == GTK_TREE_VIEW_COLUMN_AUTOSIZE)
@@ -1682,13 +1796,13 @@ gtk_tree_view_column_set_sizing (GtkTreeViewColumn       *tree_column,
   /* I was clearly on crack when I wrote this.  I'm not sure what's supposed to
    * be below so I'll leave it until I figure it out.
    */
-  if (tree_column->column_type == GTK_TREE_VIEW_COLUMN_AUTOSIZE &&
-      tree_column->requested_width != -1)
+  if (priv->column_type == GTK_TREE_VIEW_COLUMN_AUTOSIZE &&
+      priv->requested_width != -1)
     {
-      gtk_tree_view_column_set_sizing (tree_column, tree_column->requested_width);
+      gtk_tree_view_column_set_sizing (tree_column, priv->requested_width);
     }
 #endif
-  tree_column->column_type = type;
+  priv->column_type = type;
 
   gtk_tree_view_column_update_button (tree_column);
 
@@ -1708,7 +1822,7 @@ gtk_tree_view_column_get_sizing (GtkTreeViewColumn *tree_column)
 {
   g_return_val_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column), 0);
 
-  return tree_column->column_type;
+  return tree_column->priv->column_type;
 }
 
 /**
@@ -1724,7 +1838,7 @@ gtk_tree_view_column_get_width (GtkTreeViewColumn *tree_column)
 {
   g_return_val_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column), 0);
 
-  return tree_column->width;
+  return tree_column->priv->width;
 }
 
 void
@@ -1732,10 +1846,14 @@ _gtk_tree_view_column_set_width (GtkTreeViewColumn *tree_column,
                                  int                width,
 				 int                internal_width)
 {
+  GtkTreeViewColumnPrivate *priv;
+
   g_return_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column));
 
-  gtk_cell_area_context_allocate (tree_column->cell_area_context, internal_width, -1);
-  tree_column->width = width;
+  priv = tree_column->priv;
+
+  gtk_cell_area_context_allocate (priv->cell_area_context, internal_width, -1);
+  priv->width = width;
 
   g_object_notify (G_OBJECT (tree_column), "width");
 }
@@ -1755,17 +1873,21 @@ void
 gtk_tree_view_column_set_fixed_width (GtkTreeViewColumn *tree_column,
 				      gint               fixed_width)
 {
+  GtkTreeViewColumnPrivate *priv;
+
   g_return_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column));
   g_return_if_fail (fixed_width > 0);
 
-  tree_column->fixed_width = fixed_width;
-  tree_column->use_resized_width = FALSE;
+  priv = tree_column->priv;
+
+  priv->fixed_width = fixed_width;
+  priv->use_resized_width = FALSE;
 
-  if (tree_column->tree_view &&
-      gtk_widget_get_realized (tree_column->tree_view) &&
-      tree_column->column_type == GTK_TREE_VIEW_COLUMN_FIXED)
+  if (priv->tree_view &&
+      gtk_widget_get_realized (priv->tree_view) &&
+      priv->column_type == GTK_TREE_VIEW_COLUMN_FIXED)
     {
-      gtk_widget_queue_resize (tree_column->tree_view);
+      gtk_widget_queue_resize (priv->tree_view);
     }
 
   g_object_notify (G_OBJECT (tree_column), "fixed-width");
@@ -1785,7 +1907,7 @@ gtk_tree_view_column_get_fixed_width (GtkTreeViewColumn *tree_column)
 {
   g_return_val_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column), 0);
 
-  return tree_column->fixed_width;
+  return tree_column->priv->fixed_width;
 }
 
 /**
@@ -1800,32 +1922,36 @@ void
 gtk_tree_view_column_set_min_width (GtkTreeViewColumn *tree_column,
 				    gint               min_width)
 {
+  GtkTreeViewColumnPrivate *priv;
+
   g_return_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column));
   g_return_if_fail (min_width >= -1);
 
-  if (min_width == tree_column->min_width)
+  priv = tree_column->priv;
+
+  if (min_width == priv->min_width)
     return;
 
-  if (tree_column->visible &&
-      tree_column->tree_view != NULL &&
-      gtk_widget_get_realized (tree_column->tree_view))
+  if (priv->visible &&
+      priv->tree_view != NULL &&
+      gtk_widget_get_realized (priv->tree_view))
     {
-      if (min_width > tree_column->width)
-	gtk_widget_queue_resize (tree_column->tree_view);
+      if (min_width > priv->width)
+	gtk_widget_queue_resize (priv->tree_view);
     }
 
-  tree_column->min_width = min_width;
+  priv->min_width = min_width;
   g_object_freeze_notify (G_OBJECT (tree_column));
-  if (tree_column->max_width != -1 && tree_column->max_width < min_width)
+  if (priv->max_width != -1 && priv->max_width < min_width)
     {
-      tree_column->max_width = min_width;
+      priv->max_width = min_width;
       g_object_notify (G_OBJECT (tree_column), "max-width");
     }
   g_object_notify (G_OBJECT (tree_column), "min-width");
   g_object_thaw_notify (G_OBJECT (tree_column));
 
-  if (tree_column->column_type == GTK_TREE_VIEW_COLUMN_AUTOSIZE)
-    _gtk_tree_view_column_autosize (GTK_TREE_VIEW (tree_column->tree_view),
+  if (priv->column_type == GTK_TREE_VIEW_COLUMN_AUTOSIZE)
+    _gtk_tree_view_column_autosize (GTK_TREE_VIEW (priv->tree_view),
 				    tree_column);
 }
 
@@ -1843,7 +1969,7 @@ gtk_tree_view_column_get_min_width (GtkTreeViewColumn *tree_column)
 {
   g_return_val_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column), -1);
 
-  return tree_column->min_width;
+  return tree_column->priv->min_width;
 }
 
 /**
@@ -1860,32 +1986,36 @@ void
 gtk_tree_view_column_set_max_width (GtkTreeViewColumn *tree_column,
 				    gint               max_width)
 {
+  GtkTreeViewColumnPrivate *priv;
+
   g_return_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column));
   g_return_if_fail (max_width >= -1);
 
-  if (max_width == tree_column->max_width)
+  priv = tree_column->priv;
+
+  if (max_width == priv->max_width)
     return;
 
-  if (tree_column->visible &&
-      tree_column->tree_view != NULL &&
-      gtk_widget_get_realized (tree_column->tree_view))
+  if (priv->visible &&
+      priv->tree_view != NULL &&
+      gtk_widget_get_realized (priv->tree_view))
     {
-      if (max_width != -1 && max_width < tree_column->width)
-	gtk_widget_queue_resize (tree_column->tree_view);
+      if (max_width != -1 && max_width < priv->width)
+	gtk_widget_queue_resize (priv->tree_view);
     }
 
-  tree_column->max_width = max_width;
+  priv->max_width = max_width;
   g_object_freeze_notify (G_OBJECT (tree_column));
-  if (max_width != -1 && max_width < tree_column->min_width)
+  if (max_width != -1 && max_width < priv->min_width)
     {
-      tree_column->min_width = max_width;
+      priv->min_width = max_width;
       g_object_notify (G_OBJECT (tree_column), "min-width");
     }
   g_object_notify (G_OBJECT (tree_column), "max-width");
   g_object_thaw_notify (G_OBJECT (tree_column));
 
-  if (tree_column->column_type == GTK_TREE_VIEW_COLUMN_AUTOSIZE)
-    _gtk_tree_view_column_autosize (GTK_TREE_VIEW (tree_column->tree_view),
+  if (priv->column_type == GTK_TREE_VIEW_COLUMN_AUTOSIZE)
+    _gtk_tree_view_column_autosize (GTK_TREE_VIEW (priv->tree_view),
 				    tree_column);
 }
 
@@ -1903,7 +2033,7 @@ gtk_tree_view_column_get_max_width (GtkTreeViewColumn *tree_column)
 {
   g_return_val_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column), -1);
 
-  return tree_column->max_width;
+  return tree_column->priv->max_width;
 }
 
 /**
@@ -1916,12 +2046,16 @@ gtk_tree_view_column_get_max_width (GtkTreeViewColumn *tree_column)
 void
 gtk_tree_view_column_clicked (GtkTreeViewColumn *tree_column)
 {
+  GtkTreeViewColumnPrivate *priv;
+
   g_return_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column));
 
-  if (tree_column->visible &&
-      tree_column->button &&
-      tree_column->clickable)
-    gtk_button_clicked (GTK_BUTTON (tree_column->button));
+  priv = tree_column->priv;
+
+  if (priv->visible &&
+      priv->button &&
+      priv->clickable)
+    gtk_button_clicked (GTK_BUTTON (priv->button));
 }
 
 /**
@@ -1936,13 +2070,16 @@ void
 gtk_tree_view_column_set_title (GtkTreeViewColumn *tree_column,
 				const gchar       *title)
 {
-  gchar *new_title;
-  
+  GtkTreeViewColumnPrivate *priv;
+  gchar                    *new_title;
+
   g_return_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column));
 
+  priv = tree_column->priv;
+
   new_title = g_strdup (title);
-  g_free (tree_column->title);
-  tree_column->title = new_title;
+  g_free (priv->title);
+  priv->title = new_title;
 
   gtk_tree_view_column_update_button (tree_column);
   g_object_notify (G_OBJECT (tree_column), "title");
@@ -1962,7 +2099,7 @@ gtk_tree_view_column_get_title (GtkTreeViewColumn *tree_column)
 {
   g_return_val_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column), NULL);
 
-  return tree_column->title;
+  return tree_column->priv->title;
 }
 
 /**
@@ -1981,25 +2118,29 @@ void
 gtk_tree_view_column_set_expand (GtkTreeViewColumn *tree_column,
 				 gboolean           expand)
 {
+  GtkTreeViewColumnPrivate *priv;
+
   g_return_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column));
 
+  priv = tree_column->priv;
+
   expand = expand?TRUE:FALSE;
-  if (tree_column->expand == expand)
+  if (priv->expand == expand)
     return;
-  tree_column->expand = expand;
+  priv->expand = expand;
 
-  if (tree_column->visible &&
-      tree_column->tree_view != NULL &&
-      gtk_widget_get_realized (tree_column->tree_view))
+  if (priv->visible &&
+      priv->tree_view != NULL &&
+      gtk_widget_get_realized (priv->tree_view))
     {
       /* We want to continue using the original width of the
        * column that includes additional space added by the user
        * resizing the columns and possibly extra (expanded) space, which
        * are not included in the resized width.
        */
-      tree_column->use_resized_width = FALSE;
+      priv->use_resized_width = FALSE;
 
-      gtk_widget_queue_resize (tree_column->tree_view);
+      gtk_widget_queue_resize (priv->tree_view);
     }
 
   g_object_notify (G_OBJECT (tree_column), "expand");
@@ -2020,7 +2161,7 @@ gtk_tree_view_column_get_expand (GtkTreeViewColumn *tree_column)
 {
   g_return_val_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column), FALSE);
 
-  return tree_column->expand;
+  return tree_column->priv->expand;
 }
 
 /**
@@ -2035,13 +2176,17 @@ void
 gtk_tree_view_column_set_clickable (GtkTreeViewColumn *tree_column,
                                     gboolean           clickable)
 {
+  GtkTreeViewColumnPrivate *priv;
+
   g_return_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column));
 
+  priv = tree_column->priv;
+
   clickable = !! clickable;
-  if (tree_column->clickable == clickable)
+  if (priv->clickable == clickable)
     return;
 
-  tree_column->clickable = clickable;
+  priv->clickable = clickable;
   gtk_tree_view_column_update_button (tree_column);
   g_object_notify (G_OBJECT (tree_column), "clickable");
 }
@@ -2059,7 +2204,7 @@ gtk_tree_view_column_get_clickable (GtkTreeViewColumn *tree_column)
 {
   g_return_val_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column), FALSE);
 
-  return tree_column->clickable;
+  return tree_column->priv->clickable;
 }
 
 /**
@@ -2074,16 +2219,20 @@ void
 gtk_tree_view_column_set_widget (GtkTreeViewColumn *tree_column,
 				 GtkWidget         *widget)
 {
+  GtkTreeViewColumnPrivate *priv;
+
   g_return_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column));
   g_return_if_fail (widget == NULL || GTK_IS_WIDGET (widget));
 
+  priv = tree_column->priv;
+
   if (widget)
     g_object_ref_sink (widget);
 
-  if (tree_column->child)      
-    g_object_unref (tree_column->child);
+  if (priv->child)      
+    g_object_unref (priv->child);
 
-  tree_column->child = widget;
+  priv->child = widget;
   gtk_tree_view_column_update_button (tree_column);
   g_object_notify (G_OBJECT (tree_column), "widget");
 }
@@ -2103,7 +2252,7 @@ gtk_tree_view_column_get_widget (GtkTreeViewColumn *tree_column)
 {
   g_return_val_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column), NULL);
 
-  return tree_column->child;
+  return tree_column->priv->child;
 }
 
 /**
@@ -2119,14 +2268,18 @@ void
 gtk_tree_view_column_set_alignment (GtkTreeViewColumn *tree_column,
                                     gfloat             xalign)
 {
+  GtkTreeViewColumnPrivate *priv;
+
   g_return_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column));
 
+  priv = tree_column->priv;
+
   xalign = CLAMP (xalign, 0.0, 1.0);
 
-  if (tree_column->xalign == xalign)
+  if (priv->xalign == xalign)
     return;
 
-  tree_column->xalign = xalign;
+  priv->xalign = xalign;
   gtk_tree_view_column_update_button (tree_column);
   g_object_notify (G_OBJECT (tree_column), "alignment");
 }
@@ -2145,7 +2298,7 @@ gtk_tree_view_column_get_alignment (GtkTreeViewColumn *tree_column)
 {
   g_return_val_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column), 0.5);
 
-  return tree_column->xalign;
+  return tree_column->priv->xalign;
 }
 
 /**
@@ -2160,15 +2313,19 @@ void
 gtk_tree_view_column_set_reorderable (GtkTreeViewColumn *tree_column,
 				      gboolean           reorderable)
 {
+  GtkTreeViewColumnPrivate *priv;
+
   g_return_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column));
 
+  priv = tree_column->priv;
+
   /*  if (reorderable)
       gtk_tree_view_column_set_clickable (tree_column, TRUE);*/
 
-  if (tree_column->reorderable == (reorderable?TRUE:FALSE))
+  if (priv->reorderable == (reorderable?TRUE:FALSE))
     return;
 
-  tree_column->reorderable = (reorderable?TRUE:FALSE);
+  priv->reorderable = (reorderable?TRUE:FALSE);
   gtk_tree_view_column_update_button (tree_column);
   g_object_notify (G_OBJECT (tree_column), "reorderable");
 }
@@ -2186,7 +2343,7 @@ gtk_tree_view_column_get_reorderable (GtkTreeViewColumn *tree_column)
 {
   g_return_val_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column), FALSE);
 
-  return tree_column->reorderable;
+  return tree_column->priv->reorderable;
 }
 
 
@@ -2202,29 +2359,33 @@ void
 gtk_tree_view_column_set_sort_column_id (GtkTreeViewColumn *tree_column,
 					 gint               sort_column_id)
 {
+  GtkTreeViewColumnPrivate *priv;
+
   g_return_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column));
   g_return_if_fail (sort_column_id >= -1);
 
-  if (tree_column->sort_column_id == sort_column_id)
+  priv = tree_column->priv;
+
+  if (priv->sort_column_id == sort_column_id)
     return;
 
-  tree_column->sort_column_id = sort_column_id;
+  priv->sort_column_id = sort_column_id;
 
   /* Handle unsetting the id */
   if (sort_column_id == -1)
     {
-      GtkTreeModel *model = gtk_tree_view_get_model (GTK_TREE_VIEW (tree_column->tree_view));
+      GtkTreeModel *model = gtk_tree_view_get_model (GTK_TREE_VIEW (priv->tree_view));
 
-      if (tree_column->sort_clicked_signal)
+      if (priv->sort_clicked_signal)
 	{
-	  g_signal_handler_disconnect (tree_column, tree_column->sort_clicked_signal);
-	  tree_column->sort_clicked_signal = 0;
+	  g_signal_handler_disconnect (tree_column, priv->sort_clicked_signal);
+	  priv->sort_clicked_signal = 0;
 	}
 
-      if (tree_column->sort_column_changed_signal)
+      if (priv->sort_column_changed_signal)
 	{
-	  g_signal_handler_disconnect (model, tree_column->sort_column_changed_signal);
-	  tree_column->sort_column_changed_signal = 0;
+	  g_signal_handler_disconnect (model, priv->sort_column_changed_signal);
+	  priv->sort_column_changed_signal = 0;
 	}
 
       gtk_tree_view_column_set_sort_order (tree_column, GTK_SORT_ASCENDING);
@@ -2236,11 +2397,11 @@ gtk_tree_view_column_set_sort_column_id (GtkTreeViewColumn *tree_column,
 
   gtk_tree_view_column_set_clickable (tree_column, TRUE);
 
-  if (! tree_column->sort_clicked_signal)
-    tree_column->sort_clicked_signal = g_signal_connect (tree_column,
-                                                         "clicked",
-                                                         G_CALLBACK (gtk_tree_view_column_sort),
-                                                         NULL);
+  if (! priv->sort_clicked_signal)
+    priv->sort_clicked_signal = g_signal_connect (tree_column,
+						  "clicked",
+						  G_CALLBACK (gtk_tree_view_column_sort),
+						  NULL);
 
   gtk_tree_view_column_setup_sort_column_id_callback (tree_column);
   g_object_notify (G_OBJECT (tree_column), "sort-column-id");
@@ -2262,7 +2423,7 @@ gtk_tree_view_column_get_sort_column_id (GtkTreeViewColumn *tree_column)
 {
   g_return_val_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column), 0);
 
-  return tree_column->sort_column_id;
+  return tree_column->priv->sort_column_id;
 }
 
 /**
@@ -2284,10 +2445,10 @@ gtk_tree_view_column_set_sort_indicator (GtkTreeViewColumn     *tree_column,
 
   setting = setting != FALSE;
 
-  if (setting == tree_column->show_sort_indicator)
+  if (setting == tree_column->priv->show_sort_indicator)
     return;
 
-  tree_column->show_sort_indicator = setting;
+  tree_column->priv->show_sort_indicator = setting;
   gtk_tree_view_column_update_button (tree_column);
   g_object_notify (G_OBJECT (tree_column), "sort-indicator");
 }
@@ -2305,7 +2466,7 @@ gtk_tree_view_column_get_sort_indicator  (GtkTreeViewColumn     *tree_column)
 {
   g_return_val_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column), FALSE);
 
-  return tree_column->show_sort_indicator;
+  return tree_column->priv->show_sort_indicator;
 }
 
 /**
@@ -2331,10 +2492,10 @@ gtk_tree_view_column_set_sort_order      (GtkTreeViewColumn     *tree_column,
 {
   g_return_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column));
 
-  if (order == tree_column->sort_order)
+  if (order == tree_column->priv->sort_order)
     return;
 
-  tree_column->sort_order = order;
+  tree_column->priv->sort_order = order;
   gtk_tree_view_column_update_button (tree_column);
   g_object_notify (G_OBJECT (tree_column), "sort-order");
 }
@@ -2352,7 +2513,7 @@ gtk_tree_view_column_get_sort_order      (GtkTreeViewColumn     *tree_column)
 {
   g_return_val_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column), 0);
 
-  return tree_column->sort_order;
+  return tree_column->priv->sort_order;
 }
 
 /**
@@ -2380,7 +2541,7 @@ gtk_tree_view_column_cell_set_cell_data (GtkTreeViewColumn *tree_column,
   if (tree_model == NULL)
     return;
 
-  gtk_cell_area_apply_attributes (tree_column->cell_area, tree_model, iter,
+  gtk_cell_area_apply_attributes (tree_column->priv->cell_area, tree_model, iter,
                                   is_expander, is_expanded);
 }
 
@@ -2404,10 +2565,13 @@ gtk_tree_view_column_cell_get_size (GtkTreeViewColumn  *tree_column,
 				    gint               *width,
 				    gint               *height)
 {
+  GtkTreeViewColumnPrivate *priv;
   int focus_line_width;
 
   g_return_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column));
 
+  priv = tree_column->priv;
+
   if (height)
     * height = 0;
   if (width)
@@ -2421,26 +2585,26 @@ gtk_tree_view_column_cell_get_size (GtkTreeViewColumn  *tree_column,
    * get less width than expected (due to subtraction of focus_line_width?)
    * and will unnecessarily wrap.
    */
-  gtk_widget_style_get (tree_column->tree_view,
+  gtk_widget_style_get (priv->tree_view,
                         "focus-line-width", &focus_line_width,
                         NULL);
 
-  g_signal_handler_block (tree_column->cell_area_context, 
-			  tree_column->context_changed_signal);
+  g_signal_handler_block (priv->cell_area_context, 
+			  priv->context_changed_signal);
 
-  gtk_cell_area_get_preferred_width (tree_column->cell_area,
-                                     tree_column->cell_area_context,
-                                     tree_column->tree_view,
+  gtk_cell_area_get_preferred_width (priv->cell_area,
+                                     priv->cell_area_context,
+                                     priv->tree_view,
                                      width, NULL);
-  gtk_cell_area_get_preferred_height_for_width (tree_column->cell_area,
-                                                tree_column->cell_area_context,
-                                                tree_column->tree_view,
+  gtk_cell_area_get_preferred_height_for_width (priv->cell_area,
+                                                priv->cell_area_context,
+                                                priv->tree_view,
                                                 *width + focus_line_width * 2,
                                                 height,
                                                 NULL);
 
-  g_signal_handler_unblock (tree_column->cell_area_context, 
-			    tree_column->context_changed_signal);
+  g_signal_handler_unblock (priv->cell_area_context, 
+			    priv->context_changed_signal);
 
 }
 
@@ -2463,15 +2627,19 @@ _gtk_tree_view_column_cell_render (GtkTreeViewColumn  *tree_column,
 				   guint               flags,
                                    gboolean            draw_focus)
 {
+  GtkTreeViewColumnPrivate *priv;
+
   g_return_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column));
   g_return_if_fail (cr != NULL);
   g_return_if_fail (background_area != NULL);
   g_return_if_fail (cell_area != NULL);
 
+  priv = tree_column->priv;
+
   cairo_save (cr);
 
-  gtk_cell_area_render (tree_column->cell_area, tree_column->cell_area_context,
-                        tree_column->tree_view, cr,
+  gtk_cell_area_render (priv->cell_area, priv->cell_area_context,
+                        priv->tree_view, cr,
                         background_area, cell_area, flags,
                         draw_focus);
 
@@ -2487,15 +2655,29 @@ _gtk_tree_view_column_cell_event (GtkTreeViewColumn  *tree_column,
 				  const GdkRectangle *cell_area,
 				  guint               flags)
 {
+  GtkTreeViewColumnPrivate *priv;
+
   g_return_val_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column), FALSE);
 
+  priv = tree_column->priv;
+
   /* FIXME: Should we pass background area here as well?
    * What will happen to the path_string and editable widget
    * variables?
+   *
+   * Answer, No dont pass background area... editable widgets
+   * grab the pointer and keyboard so the treeview doesnt 
+   * recieve these events while editable widgets are editing.
+   *
+   * Also it's important that gtk_cell_area_apply_attributes be
+   * called before passing the event to the cell (maybe we need to 
+   * instead use the path_string here to apply the attributes ?, 
+   * if the attributes are applied, the underlying CellArea knows
+   * the path string, which is expected when handling events).
    */
-  return gtk_cell_area_event (tree_column->cell_area,
-                              tree_column->cell_area_context,
-                              tree_column->tree_view,
+  return gtk_cell_area_event (priv->cell_area,
+                              priv->cell_area_context,
+                              priv->tree_view,
                               event,
                               cell_area,
                               flags);
@@ -2529,8 +2711,9 @@ _gtk_tree_view_column_cell_focus (GtkTreeViewColumn *tree_column,
 {
   gboolean rtl;
   GtkDirectionType direction = 0;
+  GtkTreeViewColumnPrivate *priv = tree_column->priv;
 
-  rtl = gtk_widget_get_direction (GTK_WIDGET (tree_column->tree_view)) == GTK_TEXT_DIR_RTL;
+  rtl = gtk_widget_get_direction (priv->tree_view) == GTK_TEXT_DIR_RTL;
 
   switch (count)
     {
@@ -2546,9 +2729,11 @@ _gtk_tree_view_column_cell_focus (GtkTreeViewColumn *tree_column,
   /* if we are the current focus column and have multiple editable cells,
    * try to select the next one, else move the focus to the next column
    */
-  if (GTK_TREE_VIEW (tree_column->tree_view)->priv->focus_column == tree_column)
+
+  /* XXX Access to GtkTreeViewPrivate */
+  if (GTK_TREE_VIEW (priv->tree_view)->priv->focus_column == tree_column)
     {
-      if (gtk_cell_area_focus (tree_column->cell_area, direction))
+      if (gtk_cell_area_focus (priv->cell_area, direction))
         /* Focus stays in this column, so we are done */
         return TRUE;
 
@@ -2556,18 +2741,18 @@ _gtk_tree_view_column_cell_focus (GtkTreeViewColumn *tree_column,
       if (count == -1 && !left)
         {
           direction = GTK_DIR_RIGHT;
-          gtk_cell_area_focus (tree_column->cell_area, direction);
+          gtk_cell_area_focus (priv->cell_area, direction);
         }
       else if (count == 1 && !right)
         {
           direction = GTK_DIR_LEFT;
-          gtk_cell_area_focus (tree_column->cell_area, direction);
+          gtk_cell_area_focus (priv->cell_area, direction);
         }
 
       return FALSE;
     }
 
-  return gtk_cell_area_focus (tree_column->cell_area, direction);
+  return gtk_cell_area_focus (priv->cell_area, direction);
 }
 
 /**
@@ -2585,10 +2770,13 @@ gtk_tree_view_column_cell_is_visible (GtkTreeViewColumn *tree_column)
 {
   GList *list;
   GList *cells;
+  GtkTreeViewColumnPrivate *priv;
 
   g_return_val_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column), FALSE);
 
-  cells = gtk_cell_layout_get_cells (GTK_CELL_LAYOUT (tree_column->cell_area));
+  priv = tree_column->priv;
+
+  cells = gtk_cell_layout_get_cells (GTK_CELL_LAYOUT (priv->cell_area));
   for (list = cells; list; list = list->next)
     {
       if (gtk_cell_renderer_get_visible (list->data))
@@ -2620,28 +2808,37 @@ gtk_tree_view_column_focus_cell (GtkTreeViewColumn *tree_column,
   g_return_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column));
   g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
 
-  gtk_cell_area_set_focus_cell (tree_column->cell_area, cell);
+  gtk_cell_area_set_focus_cell (tree_column->priv->cell_area, cell);
 }
 
 void
 _gtk_tree_view_column_cell_set_dirty (GtkTreeViewColumn *tree_column,
 				      gboolean           install_handler)
 {
-  tree_column->dirty = TRUE;
-  tree_column->requested_width = -1;
-  tree_column->width = 0;
+  GtkTreeViewColumnPrivate *priv = tree_column->priv;
+
+  priv->dirty = TRUE;
+  priv->requested_width = -1;
+  priv->width = 0;
 
-  if (tree_column->tree_view &&
-      gtk_widget_get_realized (tree_column->tree_view))
+  if (priv->tree_view &&
+      gtk_widget_get_realized (priv->tree_view))
     {
       if (install_handler)
-	_gtk_tree_view_install_mark_rows_col_dirty (GTK_TREE_VIEW (tree_column->tree_view));
+	_gtk_tree_view_install_mark_rows_col_dirty (GTK_TREE_VIEW (priv->tree_view));
       else
-	GTK_TREE_VIEW (tree_column->tree_view)->priv->mark_rows_col_dirty = TRUE;
-      gtk_widget_queue_resize (tree_column->tree_view);
+	/* XXX Access to GtkTreeViewPrivate */
+	GTK_TREE_VIEW (priv->tree_view)->priv->mark_rows_col_dirty = TRUE;
+      gtk_widget_queue_resize (priv->tree_view);
     }
 }
 
+gboolean
+_gtk_tree_view_column_cell_get_dirty (GtkTreeViewColumn  *tree_column)
+{
+  return tree_column->priv->dirty;
+}
+
 /**
  * gtk_tree_view_column_cell_get_position:
  * @tree_column: a #GtkTreeViewColumn
@@ -2662,13 +2859,19 @@ gtk_tree_view_column_cell_get_position (GtkTreeViewColumn *tree_column,
 					gint              *start_pos,
 					gint              *width)
 {
+  GtkTreeViewColumnPrivate *priv;
   GdkRectangle zero_cell_area = { 0, };
   GdkRectangle allocation;
 
+  g_return_val_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column), FALSE);
+  g_return_val_if_fail (GTK_IS_CELL_RENDERER (cell_renderer), FALSE);
+
+  priv = tree_column->priv;
+
   /* FIXME: Could use a boolean return value for invalid cells */
-  gtk_cell_area_get_cell_allocation (tree_column->cell_area,
-                                     tree_column->cell_area_context,
-                                     tree_column->tree_view,
+  gtk_cell_area_get_cell_allocation (priv->cell_area,
+                                     priv->cell_area_context,
+                                     priv->tree_view,
                                      cell_renderer,
                                      &zero_cell_area,
                                      &allocation);
@@ -2695,7 +2898,7 @@ gtk_tree_view_column_queue_resize (GtkTreeViewColumn *tree_column)
 {
   g_return_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column));
 
-  if (tree_column->tree_view)
+  if (tree_column->priv->tree_view)
     _gtk_tree_view_column_cell_set_dirty (tree_column, TRUE);
 }
 
@@ -2717,5 +2920,80 @@ gtk_tree_view_column_get_tree_view (GtkTreeViewColumn *tree_column)
 {
   g_return_val_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column), NULL);
 
-  return tree_column->tree_view;
+  return tree_column->priv->tree_view;
+}
+
+/**
+ * gtk_tree_view_column_get_button:
+ * @tree_column: A #GtkTreeViewColumn
+ *
+ * Returns the button used in the treeview column header
+ *
+ * Return value: (transfer none): The button for the column header.
+ *
+ * Since: 3.0
+ */
+GtkWidget *
+gtk_tree_view_column_get_button (GtkTreeViewColumn *tree_column)
+{
+  g_return_val_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column), NULL);
+
+  return tree_column->priv->button;
+}
+
+GdkWindow *
+_gtk_tree_view_column_get_window (GtkTreeViewColumn  *column)
+{
+  return column->priv->window;
+}
+
+void
+_gtk_tree_view_column_set_requested_width (GtkTreeViewColumn  *column,
+					   gint                width)
+{
+  column->priv->requested_width = width;
+}
+
+gint
+_gtk_tree_view_column_get_requested_width (GtkTreeViewColumn  *column)
+{
+  return column->priv->requested_width;
+}
+
+void
+_gtk_tree_view_column_set_resized_width (GtkTreeViewColumn  *column,
+					 gint                width)
+{
+  column->priv->resized_width = width;
+}
+
+gint
+_gtk_tree_view_column_get_resized_width (GtkTreeViewColumn  *column)
+{
+  return column->priv->resized_width;
+}
+
+void
+_gtk_tree_view_column_set_use_resized_width (GtkTreeViewColumn  *column,
+					     gboolean            use_resized_width)
+{
+  column->priv->use_resized_width = use_resized_width;
+}
+
+gboolean
+_gtk_tree_view_column_get_use_resized_width (GtkTreeViewColumn  *column)
+{
+  return column->priv->use_resized_width;
+}
+
+gint
+_gtk_tree_view_column_get_drag_x (GtkTreeViewColumn  *column)
+{
+  return column->priv->drag_x;
+}
+
+GtkCellAreaContext *
+_gtk_tree_view_column_get_context (GtkTreeViewColumn  *column)
+{
+  return column->priv->cell_area_context;
 }
diff --git a/gtk/gtktreeviewcolumn.h b/gtk/gtktreeviewcolumn.h
index 631052b..ac2807b 100644
--- a/gtk/gtktreeviewcolumn.h
+++ b/gtk/gtktreeviewcolumn.h
@@ -40,8 +40,9 @@ G_BEGIN_DECLS
 #define GTK_IS_TREE_VIEW_COLUMN_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_TREE_VIEW_COLUMN))
 #define GTK_TREE_VIEW_COLUMN_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_TREE_VIEW_COLUMN, GtkTreeViewColumnClass))
 
-typedef struct _GtkTreeViewColumn      GtkTreeViewColumn;
-typedef struct _GtkTreeViewColumnClass GtkTreeViewColumnClass;
+typedef struct _GtkTreeViewColumn        GtkTreeViewColumn;
+typedef struct _GtkTreeViewColumnClass   GtkTreeViewColumnClass;
+typedef struct _GtkTreeViewColumnPrivate GtkTreeViewColumnPrivate;
 
 /**
  * GtkTreeViewColumnSizing:
@@ -86,56 +87,7 @@ struct _GtkTreeViewColumn
 {
   GInitiallyUnowned parent_instance;
 
-  GtkWidget *GSEAL (tree_view);
-  GtkWidget *GSEAL (button);
-  GtkWidget *GSEAL (child);
-  GtkWidget *GSEAL (arrow);
-  GtkWidget *GSEAL (alignment);
-  GdkWindow *GSEAL (window);
-  gfloat GSEAL (xalign);
-  gulong GSEAL (property_changed_signal);
-
-  /* Sizing fields */
-  /* see gtk+/doc/tree-column-sizing.txt for more information on them */
-  GtkTreeViewColumnSizing GSEAL (column_type);
-  gint GSEAL (requested_width);
-  gint GSEAL (button_request);
-  gint GSEAL (resized_width);
-  gint GSEAL (width);
-  gint GSEAL (fixed_width);
-  gint GSEAL (min_width);
-  gint GSEAL (max_width);
-
-  /* dragging columns */
-  gint GSEAL (drag_x);
-  gint GSEAL (drag_y);
-
-  gchar *GSEAL (title);
-
-  /* Sorting */
-  gulong GSEAL (sort_clicked_signal);
-  gulong GSEAL (sort_column_changed_signal);
-  gint GSEAL (sort_column_id);
-  GtkSortType GSEAL (sort_order);
-
-  /* Cell area */
-  GtkCellArea *cell_area;
-  GtkCellAreaContext *cell_area_context;
-
-  gulong add_editable_signal;
-  gulong remove_editable_signal;
-  gulong context_changed_signal;
-
-  /* Flags */
-  guint GSEAL (visible)             : 1;
-  guint GSEAL (resizable)           : 1;
-  guint GSEAL (clickable)           : 1;
-  guint GSEAL (dirty)               : 1;
-  guint GSEAL (show_sort_indicator) : 1;
-  guint GSEAL (maybe_reordered)     : 1;
-  guint GSEAL (reorderable)         : 1;
-  guint GSEAL (use_resized_width)   : 1;
-  guint GSEAL (expand)              : 1;
+  GtkTreeViewColumnPrivate *priv;
 };
 
 struct _GtkTreeViewColumnClass
@@ -262,6 +214,7 @@ gboolean                gtk_tree_view_column_cell_get_position   (GtkTreeViewCol
 					                          gint                    *width);
 void                    gtk_tree_view_column_queue_resize        (GtkTreeViewColumn       *tree_column);
 GtkWidget              *gtk_tree_view_column_get_tree_view       (GtkTreeViewColumn       *tree_column);
+GtkWidget              *gtk_tree_view_column_get_button          (GtkTreeViewColumn       *tree_column);
 
 
 G_END_DECLS
diff --git a/modules/other/gail/gailtreeview.c b/modules/other/gail/gailtreeview.c
index 60de100..f1b5063 100644
--- a/modules/other/gail/gailtreeview.c
+++ b/modules/other/gail/gailtreeview.c
@@ -4651,7 +4651,7 @@ get_header_from_column (GtkTreeViewColumn *tv_col)
       /* If the user has not set a header object, grab the column */
       /* header object defined by the GtkTreeView */
 
-      header_widget = tv_col->button;
+      header_widget = gtk_tree_view_column_get_button (tv_col);
 
       if (header_widget)
         {
diff --git a/tests/testtooltips.c b/tests/testtooltips.c
index 9cb1fcc..42f02e6 100644
--- a/tests/testtooltips.c
+++ b/tests/testtooltips.c
@@ -359,7 +359,7 @@ main (int argc, char *argv[])
   /* Set a tooltip on the column */
   column = gtk_tree_view_get_column (GTK_TREE_VIEW (tree_view), 0);
   gtk_tree_view_column_set_clickable (column, TRUE);
-  g_object_set (column->button, "tooltip-text", "Header", NULL);
+  g_object_set (gtk_tree_view_column_get_button (column), "tooltip-text", "Header", NULL);
 
   gtk_box_pack_start (GTK_BOX (box), tree_view, FALSE, FALSE, 2);
 



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