[gtk+/combo-refactor: 14/48] GtkCellView now watches the "row-changed" signal.

[Tristan Van Berkom <tvb src gnome org>]

commit fd3b4ab4e333b67276d389b4dd8f4d1b27e0ad3a
Author: Tristan Van Berkom <tristan van berkom gmail com>
Date:   Mon Nov 22 15:51:51 2010 +0900

    GtkCellView now watches the "row-changed" signal.
    
    When the "row-changed" signal on the model is trapped, if the row which
    changed is the displayed row then the context is flushed and sizes are
    recalculated for every area in the same context.

 gtk/gtkcellview.c |   36 ++++++++++++++++++++++++++++++++++--
 1 files changed, 34 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkcellview.c b/gtk/gtkcellview.c
index a628694..0da8002 100644
--- a/gtk/gtkcellview.c
+++ b/gtk/gtkcellview.c
@@ -54,6 +54,7 @@ struct _GtkCellViewPrivate
   gboolean             background_set;
 
   gulong               size_changed_id;
+  gulong               row_changed_id;
 };
 
 
@@ -138,7 +139,10 @@ static void       gtk_cell_view_get_preferred_height_for_width (GtkWidget
 static void       context_size_changed_cb                      (GtkCellAreaContext   *context,
 								GParamSpec           *pspec,
 								GtkWidget            *view);
-
+static void       row_changed_cb                               (GtkTreeModel         *model,
+								GtkTreePath          *path,
+								GtkTreeIter          *iter,
+								GtkCellView          *view);
 
 static GtkBuildableIface *parent_buildable_iface;
 
@@ -669,6 +673,24 @@ context_size_changed_cb (GtkCellAreaContext  *context,
     gtk_widget_queue_resize (view);
 }
 
+static void
+row_changed_cb (GtkTreeModel         *model,
+		GtkTreePath          *path,
+		GtkTreeIter          *iter,
+		GtkCellView          *view)
+{
+  GtkTreePath *row_path;
+
+  if (view->priv->displayed_row)
+    {
+      row_path = 
+	gtk_tree_row_reference_get_path (view->priv->displayed_row);
+
+      /* Resize everything in our context if our row changed */
+      if (gtk_tree_path_compare (row_path, path) == 0)
+	gtk_cell_area_context_flush (view->priv->context);
+    }
+}
 
 /**
  * gtk_cell_view_new:
@@ -863,6 +885,10 @@ gtk_cell_view_set_model (GtkCellView  *cell_view,
 
   if (cell_view->priv->model)
     {
+      g_signal_handler_disconnect (cell_view->priv->model, 
+				   cell_view->priv->row_changed_id);
+      cell_view->priv->row_changed_id = 0;
+
       if (cell_view->priv->displayed_row)
         gtk_tree_row_reference_free (cell_view->priv->displayed_row);
       cell_view->priv->displayed_row = NULL;
@@ -874,7 +900,13 @@ gtk_cell_view_set_model (GtkCellView  *cell_view,
   cell_view->priv->model = model;
 
   if (cell_view->priv->model)
-    g_object_ref (cell_view->priv->model);
+    {
+      g_object_ref (cell_view->priv->model);
+
+      cell_view->priv->row_changed_id = 
+	g_signal_connect (cell_view->priv->model, "row-changed",
+			  G_CALLBACK (row_changed_cb), cell_view);
+    }
 }
 
 /**