From 832c123fd27e0439343699673ad865e86065b22d Mon Sep 17 00:00:00 2001
From: Tristan Van Berkom <tristan.van.berkom@gmail.com>
Date: Tue, 2 Nov 2010 18:01:03 +0900
Subject: [PATCH] Extended gtk_cell_area_apply_attributes() to account for
 expander/expanded cells

The state of expanded cells must come from the view, since these states
can vary across views accessing the same model (also "finished up" the
applying of attributes code).
---
 gtk/gtkcellarea.c | 31 ++++++++++++++++++++++++++++++-
 gtk/gtkcellarea.h |  4 +++-
 2 files changed, 33 insertions(+), 2 deletions(-)

diff --git a/gtk/gtkcellarea.c b/gtk/gtkcellarea.c
index e77c2280ce..634ff4906c 100644
--- a/gtk/gtkcellarea.c
+++ b/gtk/gtkcellarea.c
@@ -117,6 +117,8 @@ typedef struct {
   GtkCellArea  *area;
   GtkTreeModel *model;
   GtkTreeIter  *iter;
+  gboolean      is_expander;
+  gboolean      is_expanded;
 } AttributeData;
 
 struct _GtkCellAreaPrivate
@@ -926,6 +928,22 @@ apply_cell_attributes (GtkCellRenderer *renderer,
   CellAttribute *attribute;
   GSList        *list;
   GValue         value = { 0, };
+  gboolean       is_expander;
+  gboolean       is_expanded;
+
+  g_object_freeze_notify (G_OBJECT (renderer));
+
+  /* Whether a row expands or is presently expanded can only be 
+   * provided by the view (as these states can vary across views
+   * accessing the same model).
+   */
+  g_object_get (renderer, "is-expander", &is_expander, NULL);
+  if (is_expander != data->is_expander)
+    g_object_set (renderer, "is-expander", data->is_expander, NULL);
+  
+  g_object_get (renderer, "is-expanded", &is_expanded, NULL);
+  if (is_expanded != data->is_expanded)
+    g_object_set (renderer, "is-expanded", data->is_expanded, NULL);
 
   /* Apply the attributes directly to the renderer */
   for (list = info->attributes; list; list = list->next)
@@ -942,12 +960,16 @@ apply_cell_attributes (GtkCellRenderer *renderer,
   if (info->func)
     info->func (GTK_CELL_LAYOUT (data->area), renderer,
 		data->model, data->iter, info->data);
+
+  g_object_thaw_notify (G_OBJECT (renderer));
 }
 
 void
 gtk_cell_area_apply_attributes (GtkCellArea  *area,
 				GtkTreeModel *tree_model,
-				GtkTreeIter  *iter)
+				GtkTreeIter  *iter,
+				gboolean      is_expander,
+				gboolean      is_expanded)
 {
   GtkCellAreaPrivate *priv;
   AttributeData       data;
@@ -958,6 +980,13 @@ gtk_cell_area_apply_attributes (GtkCellArea  *area,
 
   priv = area->priv;
 
+  /* Feed in data needed to apply to every renderer */
+  data.area        = area;
+  data.model       = tree_model;
+  data.iter        = iter;
+  data.is_expander = is_expander;
+  data.is_expanded = is_expanded;
+
   /* Go over any cells that have attributes or custom GtkCellLayoutDataFuncs and
    * apply the data from the treemodel */
   g_hash_table_foreach (priv->cell_info, (GHFunc)apply_cell_attributes, &data);
diff --git a/gtk/gtkcellarea.h b/gtk/gtkcellarea.h
index c45977fb29..2e804714c5 100644
--- a/gtk/gtkcellarea.h
+++ b/gtk/gtkcellarea.h
@@ -197,7 +197,9 @@ void               gtk_cell_area_get_preferred_width_for_height (GtkCellArea
 /* Attributes */
 void               gtk_cell_area_apply_attributes               (GtkCellArea        *area,
 								 GtkTreeModel       *tree_model,
-								 GtkTreeIter        *iter);
+								 GtkTreeIter        *iter,
+								 gboolean            is_expander,
+								 gboolean            is_expanded);
 void               gtk_cell_area_attribute_connect              (GtkCellArea        *area,
 								 GtkCellRenderer    *renderer,
 								 const gchar        *attribute,