add icon_at virtual function - it was stupid to make the insert call take

2000-06-23  Chris Toshok  <toshok@helixcode.com>

	* e-tree-model.h, e-tree-model.c: add icon_at virtual function -
	it was stupid to make the insert call take 2 pixbufs.  the model
	should give this information.

	* e-cell-tree.c: get rid of the opened/closed pixbuf stuff.  call
	e_tree_model_icon_of_node.

	* e-tree-example-1.c: add my_icon_at.

	* e-tree-simple.c (simple_icon_at): new function
	(e_tree_simple_new): add icon_at parameter.

	* e-tree-simple.h: add SimpleIconAtFn.

svn path=/trunk/; revision=3707

13 files changed, 120 insertions, 104 deletions

diff --git a/widgets/e-table/ChangeLog b/widgets/e-table/ChangeLog
index f55db41bb6..a906dd91f2 100644
--- a/widgets/e-table/ChangeLog
+++ b/widgets/e-table/ChangeLog
@@ -1,5 +1,21 @@
 2000-06-23  Chris Toshok  <toshok@helixcode.com>
 
+	* e-tree-model.h, e-tree-model.c: add icon_at virtual function -
+	it was stupid to make the insert call take 2 pixbufs.  the model
+	should give this information.
+	
+	* e-cell-tree.c: get rid of the opened/closed pixbuf stuff.  call
+	e_tree_model_icon_of_node.
+
+	* e-tree-example-1.c: add my_icon_at.
+	
+	* e-tree-simple.c (simple_icon_at): new function
+	(e_tree_simple_new): add icon_at parameter.
+	
+	* e-tree-simple.h: add SimpleIconAtFn.
+
+2000-06-23  Chris Toshok  <toshok@helixcode.com>
+
 	* e-tree-example-1.c (create_tree): use the expanded/unexpanded
 	pixbufs as node pixbufs for the first level of children, to test
 	the drawing.
diff --git a/widgets/e-table/e-cell-tree.c b/widgets/e-table/e-cell-tree.c
index 61c86fad2d..2d1a006fdb 100644
--- a/widgets/e-table/e-cell-tree.c
+++ b/widgets/e-table/e-cell-tree.c
@@ -178,10 +178,7 @@ ect_draw (ECellView *ecell_view, GdkDrawable *drawable,
 		expanded = e_tree_model_node_is_expanded (tree_model, node);
 		subcell_offset = offset;
 
-		if (expanded)
-			node_image = e_tree_model_node_get_opened_pixbuf (tree_model, node);
-		else
-			node_image = e_tree_model_node_get_closed_pixbuf (tree_model, node);
+		node_image = e_tree_model_icon_of_node (tree_model, node);
 
 		if (node_image) {
 			node_image_width = gdk_pixbuf_get_width (node_image);
diff --git a/widgets/e-table/e-tree-example-1.c b/widgets/e-table/e-tree-example-1.c
index c506faebd5..c98e53c7af 100644
--- a/widgets/e-table/e-tree-example-1.c
+++ b/widgets/e-table/e-tree-example-1.c
@@ -83,6 +83,15 @@ my_value_at (ETreeModel *etm, ETreePath *path, int col, void *model_data)
 	}
 }
 
+static GdkPixbuf *
+my_icon_at (ETreeModel *etm, ETreePath *path, void *model_data)
+{
+	if (e_tree_model_node_is_expanded (etm, path))
+		return tree_expanded_pixbuf;
+	else
+		return tree_unexpanded_pixbuf;
+}
+
 /* This function sets the value at a particular point in our ETreeModel. */
 static void
 my_set_value_at (ETreeModel *etm, ETreePath *path, int col, const void *val, void *model_data)
@@ -130,7 +139,6 @@ add_sibling (GtkButton *button, gpointer data)
 
 	e_tree_model_node_insert_before (e_tree_model, parent_node,
 					 selected_node,
-					 NULL, NULL,
 					 g_strdup("User added sibling"));
 
 }
@@ -150,7 +158,7 @@ add_child (GtkButton *button, gpointer data)
 	g_assert (selected_node);
 
 	e_tree_model_node_insert (e_tree_model, selected_node,
-				  0, NULL, NULL,
+				  0,
 				  g_strdup("User added child"));
 }
 
@@ -238,25 +246,24 @@ create_tree (void)
 
 	/* here we create our model.  This uses the functions we defined
 	   earlier. */
-	e_tree_model = e_tree_simple_new (my_value_at,
+	e_tree_model = e_tree_simple_new (my_icon_at,
+					  my_value_at,
 					  my_set_value_at,
 					  my_is_editable,
 					  NULL);
 
 	/* create a root node with 5 children */
 	root_node = e_tree_model_node_insert (e_tree_model, NULL,
-					      0, NULL, NULL,
+					      0,
 					      g_strdup("Root Node"));
 
 	for (i = 0; i < 5; i++){
 		ETreePath *n = e_tree_model_node_insert (e_tree_model,
 							 root_node, 0,
-							 tree_expanded_pixbuf, tree_unexpanded_pixbuf,
 							 g_strdup("First level of children"));
 		for (j = 0; j < 5; j ++) {
 			e_tree_model_node_insert (e_tree_model,
 						  n, 0,
-						  NULL, NULL,
 						  g_strdup("Second level of children"));
 		}
 	}
diff --git a/widgets/e-table/e-tree-model.c b/widgets/e-table/e-tree-model.c
index 47b82d3689..992caf40f2 100644
--- a/widgets/e-table/e-tree-model.c
+++ b/widgets/e-table/e-tree-model.c
@@ -23,8 +23,6 @@ static ETableModel *e_tree_model_parent_class;
 typedef struct {
 	gboolean expanded;
 	guint visible_descendents;
-	GdkPixbuf *opened_pixbuf;
-	GdkPixbuf *closed_pixbuf;
 	gpointer node_data;
 } ENode;
 
@@ -216,6 +214,14 @@ etree_value_at (ETreeModel *etm, ETreePath* node, int col)
 	return NULL;
 }
 
+static GdkPixbuf*
+etree_icon_at (ETreeModel *etm, ETreePath* node)
+{
+	/* shouldn't be called */
+	g_assert (0);
+	return NULL;
+}
+
 static void
 etree_set_value_at (ETreeModel *etm, ETreePath* node, int col, const void *val)
 {
@@ -337,6 +343,7 @@ e_tree_model_class_init (GtkObjectClass *klass)
 	tree_class->get_parent        = etree_get_parent;
 
 	tree_class->value_at          = etree_value_at;
+	tree_class->icon_at           = etree_icon_at;
 	tree_class->set_value_at      = etree_set_value_at;
 	tree_class->is_editable       = etree_is_editable;
 
@@ -417,6 +424,12 @@ e_tree_model_node_at_row (ETreeModel *etree, int row)
 	return ETM_CLASS(etree)->node_at_row (etree, row);
 }
 
+GdkPixbuf *
+e_tree_model_icon_of_node (ETreeModel *etree, ETreePath *path)
+{
+	return ETM_CLASS(etree)->icon_at (etree, path);
+}
+
 int
 e_tree_model_row_of_node (ETreeModel *etree, ETreePath *node)
 {
@@ -554,36 +567,10 @@ e_tree_model_node_set_data (ETreeModel *etm, ETreePath *node, gpointer node_data
 	enode->node_data = node_data;
 }
 
-GdkPixbuf *
-e_tree_model_node_get_opened_pixbuf (ETreeModel *etm, ETreePath *node)
-{
-	ENode *enode;
-
-	g_return_val_if_fail (node && node->data, NULL);
-
-	enode = (ENode*)node->data;
-
-	return enode->opened_pixbuf;
-}
-
-GdkPixbuf *
-e_tree_model_node_get_closed_pixbuf (ETreeModel *etm, ETreePath *node)
-{
-	ENode *enode;
-
-	g_return_val_if_fail (node && node->data, NULL);
-
-	enode = (ENode*)node->data;
-
-	return enode->closed_pixbuf;
-}
-
 ETreePath*
 e_tree_model_node_insert (ETreeModel *tree_model,
 			  ETreePath *parent_path,
 			  int position,
-			  GdkPixbuf *opened_pixbuf,
-			  GdkPixbuf *closed_pixbuf,
 			  gpointer node_data)
 {
 	ENode *node;
@@ -594,8 +581,6 @@ e_tree_model_node_insert (ETreeModel *tree_model,
 	node = g_new0 (ENode, 1);
 
 	node->expanded = FALSE;
-	node->closed_pixbuf = closed_pixbuf;
-	node->opened_pixbuf = opened_pixbuf;
 	node->node_data = node_data;
 
 	if (parent_path != NULL) {
@@ -641,13 +626,10 @@ ETreePath *
 e_tree_model_node_insert_before (ETreeModel *etree,
 				 ETreePath *parent,
 				 ETreePath *sibling,
-				 GdkPixbuf *opened_pixbuf,
-				 GdkPixbuf *closed_pixbuf,
 				 gpointer node_data)
 {
 	return e_tree_model_node_insert (etree, parent,
 					 g_node_child_position (parent, sibling),
-					 opened_pixbuf, closed_pixbuf,
 					 node_data);
 }
 
diff --git a/widgets/e-table/e-tree-model.h b/widgets/e-table/e-tree-model.h
index 0a7ecdb7ed..7b8d86826f 100644
--- a/widgets/e-table/e-tree-model.h
+++ b/widgets/e-table/e-tree-model.h
@@ -39,6 +39,7 @@ typedef struct {
 	void       (*set_expanded_recurse) (ETreeModel *etm, ETreePath *node, gboolean expanded);
 	void       (*set_expanded_level)   (ETreeModel *etm, ETreePath *node, gboolean expanded, int level);
 
+	GdkPixbuf *(*icon_at)              (ETreeModel *etm, ETreePath* node);
 	ETreePath* (*node_at_row)          (ETreeModel *etm, int row);
 
 	/*
@@ -69,8 +70,8 @@ ETreePath *e_tree_model_node_get_next   (ETreeModel *etree, ETreePath *path);
 ETreePath *e_tree_model_node_get_prev   (ETreeModel *etree, ETreePath *path);
 
 /* node operations */
-ETreePath *e_tree_model_node_insert        (ETreeModel *etree, ETreePath *parent, int position, GdkPixbuf *opened_pixbuf, GdkPixbuf *closed_pixbuf, gpointer node_data);
-ETreePath *e_tree_model_node_insert_before (ETreeModel *etree, ETreePath *parent, ETreePath *sibling, GdkPixbuf *opened_pixbuf, GdkPixbuf *closed_pixbuf, gpointer node_data);
+ETreePath *e_tree_model_node_insert        (ETreeModel *etree, ETreePath *parent, int position, gpointer node_data);
+ETreePath *e_tree_model_node_insert_before (ETreeModel *etree, ETreePath *parent, ETreePath *sibling, gpointer node_data);
 gpointer   e_tree_model_node_remove        (ETreeModel *etree, ETreePath *path);
 
 /* node accessors */
@@ -85,11 +86,10 @@ guint    e_tree_model_node_depth                   (ETreeModel *etree, ETreePath
 guint    e_tree_model_node_num_visible_descendents (ETreeModel *etm, ETreePath *node);
 gpointer e_tree_model_node_get_data                (ETreeModel *etm, ETreePath *node);
 void     e_tree_model_node_set_data                (ETreeModel *etm, ETreePath *node, gpointer node_data);
-GdkPixbuf *e_tree_model_node_get_opened_pixbuf     (ETreeModel *etm, ETreePath *node);
-GdkPixbuf *e_tree_model_node_get_closed_pixbuf     (ETreeModel *etm, ETreePath *node);
 
 /* display oriented routines */
 ETreePath *e_tree_model_node_at_row           (ETreeModel *etree, int row);
+GdkPixbuf *e_tree_model_icon_of_node          (ETreeModel *etree, ETreePath *path);
 int        e_tree_model_row_of_node           (ETreeModel *etree, ETreePath *path);
 void       e_tree_model_root_node_set_visible (ETreeModel *etree, gboolean visible);
 gboolean   e_tree_model_root_node_is_visible  (ETreeModel *etree);
diff --git a/widgets/e-table/e-tree-simple.c b/widgets/e-table/e-tree-simple.c
index 9bf747a43f..e5883e6ae0 100644
--- a/widgets/e-table/e-tree-simple.c
+++ b/widgets/e-table/e-tree-simple.c
@@ -23,6 +23,14 @@ simple_value_at (ETreeModel *etm, ETreePath *node, int col)
 	return simple->value_at (etm, node, col, simple->model_data);
 }
 
+static GdkPixbuf *
+simple_icon_at (ETreeModel *etm, ETreePath *node)
+{
+	ETreeSimple *simple = E_TREE_SIMPLE(etm);
+
+	return simple->icon_at (etm, node, simple->model_data);
+}
+
 static void
 simple_set_value_at (ETreeModel *etm, ETreePath *node, int col, const void *val)
 {
@@ -44,6 +52,7 @@ e_tree_simple_class_init (GtkObjectClass *object_class)
 {
 	ETreeModelClass *model_class = (ETreeModelClass *) object_class;
 
+	model_class->icon_at = simple_icon_at;
 	model_class->value_at = simple_value_at;
 	model_class->set_value_at = simple_set_value_at;
 	model_class->is_editable = simple_is_editable;
@@ -52,7 +61,8 @@ e_tree_simple_class_init (GtkObjectClass *object_class)
 E_MAKE_TYPE(e_tree_simple, "ETreeSimple", ETreeSimple, e_tree_simple_class_init, NULL, PARENT_TYPE)
 
 ETreeModel *
-e_tree_simple_new (ETreeSimpleValueAtFn value_at,
+e_tree_simple_new (ETreeSimpleIconAtFn icon_at,
+		   ETreeSimpleValueAtFn value_at,
 		   ETreeSimpleSetValueAtFn set_value_at,
 		   ETreeSimpleIsEditableFn is_editable,
 		   gpointer model_data)
@@ -63,6 +73,7 @@ e_tree_simple_new (ETreeSimpleValueAtFn value_at,
 
 	e_tree_model_construct (E_TREE_MODEL (etg));
 
+	etg->icon_at = icon_at;
 	etg->value_at = value_at;
 	etg->set_value_at = set_value_at;
 	etg->is_editable = is_editable;
diff --git a/widgets/e-table/e-tree-simple.h b/widgets/e-table/e-tree-simple.h
index 6820b14673..edda53e82d 100644
--- a/widgets/e-table/e-tree-simple.h
+++ b/widgets/e-table/e-tree-simple.h
@@ -12,13 +12,15 @@
 #define E_IS_TREE_SIMPLE_CLASS(k) (GTK_CHECK_CLASS_TYPE ((k), E_TREE_SIMPLE_TYPE))
 
 
-typedef void*    (*ETreeSimpleValueAtFn)    (ETreeModel *etree, ETreePath *path, int col, void *model_data);
-typedef void     (*ETreeSimpleSetValueAtFn) (ETreeModel *etree, ETreePath *path, int col, const void *val, void *model_data);
-typedef gboolean (*ETreeSimpleIsEditableFn) (ETreeModel *etree, ETreePath *path, int col, void *model_data);
+typedef GdkPixbuf* (*ETreeSimpleIconAtFn)     (ETreeModel *etree, ETreePath *path, void *model_data);
+typedef void*      (*ETreeSimpleValueAtFn)    (ETreeModel *etree, ETreePath *path, int col, void *model_data);
+typedef void       (*ETreeSimpleSetValueAtFn) (ETreeModel *etree, ETreePath *path, int col, const void *val, void *model_data);
+typedef gboolean   (*ETreeSimpleIsEditableFn) (ETreeModel *etree, ETreePath *path, int col, void *model_data);
 
 typedef struct {
 	ETreeModel parent;
 
+	ETreeSimpleIconAtFn icon_at;
 	ETreeSimpleValueAtFn value_at;
 	ETreeSimpleSetValueAtFn set_value_at;
 	ETreeSimpleIsEditableFn is_editable;
@@ -32,7 +34,8 @@ typedef struct {
 
 GtkType e_tree_simple_get_type (void);
 
-ETreeModel *e_tree_simple_new (ETreeSimpleValueAtFn value_at,
+ETreeModel *e_tree_simple_new (ETreeSimpleIconAtFn icon_at,
+			       ETreeSimpleValueAtFn value_at,
 			       ETreeSimpleSetValueAtFn set_value_at,
 			       ETreeSimpleIsEditableFn is_editable,
 			       gpointer model_data);
diff --git a/widgets/table/e-cell-tree.c b/widgets/table/e-cell-tree.c
index 61c86fad2d..2d1a006fdb 100644
--- a/widgets/table/e-cell-tree.c
+++ b/widgets/table/e-cell-tree.c
@@ -178,10 +178,7 @@ ect_draw (ECellView *ecell_view, GdkDrawable *drawable,
 		expanded = e_tree_model_node_is_expanded (tree_model, node);
 		subcell_offset = offset;
 
-		if (expanded)
-			node_image = e_tree_model_node_get_opened_pixbuf (tree_model, node);
-		else
-			node_image = e_tree_model_node_get_closed_pixbuf (tree_model, node);
+		node_image = e_tree_model_icon_of_node (tree_model, node);
 
 		if (node_image) {
 			node_image_width = gdk_pixbuf_get_width (node_image);
diff --git a/widgets/table/e-tree-example-1.c b/widgets/table/e-tree-example-1.c
index c506faebd5..c98e53c7af 100644
--- a/widgets/table/e-tree-example-1.c
+++ b/widgets/table/e-tree-example-1.c
@@ -83,6 +83,15 @@ my_value_at (ETreeModel *etm, ETreePath *path, int col, void *model_data)
 	}
 }
 
+static GdkPixbuf *
+my_icon_at (ETreeModel *etm, ETreePath *path, void *model_data)
+{
+	if (e_tree_model_node_is_expanded (etm, path))
+		return tree_expanded_pixbuf;
+	else
+		return tree_unexpanded_pixbuf;
+}
+
 /* This function sets the value at a particular point in our ETreeModel. */
 static void
 my_set_value_at (ETreeModel *etm, ETreePath *path, int col, const void *val, void *model_data)
@@ -130,7 +139,6 @@ add_sibling (GtkButton *button, gpointer data)
 
 	e_tree_model_node_insert_before (e_tree_model, parent_node,
 					 selected_node,
-					 NULL, NULL,
 					 g_strdup("User added sibling"));
 
 }
@@ -150,7 +158,7 @@ add_child (GtkButton *button, gpointer data)
 	g_assert (selected_node);
 
 	e_tree_model_node_insert (e_tree_model, selected_node,
-				  0, NULL, NULL,
+				  0,
 				  g_strdup("User added child"));
 }
 
@@ -238,25 +246,24 @@ create_tree (void)
 
 	/* here we create our model.  This uses the functions we defined
 	   earlier. */
-	e_tree_model = e_tree_simple_new (my_value_at,
+	e_tree_model = e_tree_simple_new (my_icon_at,
+					  my_value_at,
 					  my_set_value_at,
 					  my_is_editable,
 					  NULL);
 
 	/* create a root node with 5 children */
 	root_node = e_tree_model_node_insert (e_tree_model, NULL,
-					      0, NULL, NULL,
+					      0,
 					      g_strdup("Root Node"));
 
 	for (i = 0; i < 5; i++){
 		ETreePath *n = e_tree_model_node_insert (e_tree_model,
 							 root_node, 0,
-							 tree_expanded_pixbuf, tree_unexpanded_pixbuf,
 							 g_strdup("First level of children"));
 		for (j = 0; j < 5; j ++) {
 			e_tree_model_node_insert (e_tree_model,
 						  n, 0,
-						  NULL, NULL,
 						  g_strdup("Second level of children"));
 		}
 	}
diff --git a/widgets/table/e-tree-model.c b/widgets/table/e-tree-model.c
index 47b82d3689..992caf40f2 100644
--- a/widgets/table/e-tree-model.c
+++ b/widgets/table/e-tree-model.c
@@ -23,8 +23,6 @@ static ETableModel *e_tree_model_parent_class;
 typedef struct {
 	gboolean expanded;
 	guint visible_descendents;
-	GdkPixbuf *opened_pixbuf;
-	GdkPixbuf *closed_pixbuf;
 	gpointer node_data;
 } ENode;
 
@@ -216,6 +214,14 @@ etree_value_at (ETreeModel *etm, ETreePath* node, int col)
 	return NULL;
 }
 
+static GdkPixbuf*
+etree_icon_at (ETreeModel *etm, ETreePath* node)
+{
+	/* shouldn't be called */
+	g_assert (0);
+	return NULL;
+}
+
 static void
 etree_set_value_at (ETreeModel *etm, ETreePath* node, int col, const void *val)
 {
@@ -337,6 +343,7 @@ e_tree_model_class_init (GtkObjectClass *klass)
 	tree_class->get_parent        = etree_get_parent;
 
 	tree_class->value_at          = etree_value_at;
+	tree_class->icon_at           = etree_icon_at;
 	tree_class->set_value_at      = etree_set_value_at;
 	tree_class->is_editable       = etree_is_editable;
 
@@ -417,6 +424,12 @@ e_tree_model_node_at_row (ETreeModel *etree, int row)
 	return ETM_CLASS(etree)->node_at_row (etree, row);
 }
 
+GdkPixbuf *
+e_tree_model_icon_of_node (ETreeModel *etree, ETreePath *path)
+{
+	return ETM_CLASS(etree)->icon_at (etree, path);
+}
+
 int
 e_tree_model_row_of_node (ETreeModel *etree, ETreePath *node)
 {
@@ -554,36 +567,10 @@ e_tree_model_node_set_data (ETreeModel *etm, ETreePath *node, gpointer node_data
 	enode->node_data = node_data;
 }
 
-GdkPixbuf *
-e_tree_model_node_get_opened_pixbuf (ETreeModel *etm, ETreePath *node)
-{
-	ENode *enode;
-
-	g_return_val_if_fail (node && node->data, NULL);
-
-	enode = (ENode*)node->data;
-
-	return enode->opened_pixbuf;
-}
-
-GdkPixbuf *
-e_tree_model_node_get_closed_pixbuf (ETreeModel *etm, ETreePath *node)
-{
-	ENode *enode;
-
-	g_return_val_if_fail (node && node->data, NULL);
-
-	enode = (ENode*)node->data;
-
-	return enode->closed_pixbuf;
-}
-
 ETreePath*
 e_tree_model_node_insert (ETreeModel *tree_model,
 			  ETreePath *parent_path,
 			  int position,
-			  GdkPixbuf *opened_pixbuf,
-			  GdkPixbuf *closed_pixbuf,
 			  gpointer node_data)
 {
 	ENode *node;
@@ -594,8 +581,6 @@ e_tree_model_node_insert (ETreeModel *tree_model,
 	node = g_new0 (ENode, 1);
 
 	node->expanded = FALSE;
-	node->closed_pixbuf = closed_pixbuf;
-	node->opened_pixbuf = opened_pixbuf;
 	node->node_data = node_data;
 
 	if (parent_path != NULL) {
@@ -641,13 +626,10 @@ ETreePath *
 e_tree_model_node_insert_before (ETreeModel *etree,
 				 ETreePath *parent,
 				 ETreePath *sibling,
-				 GdkPixbuf *opened_pixbuf,
-				 GdkPixbuf *closed_pixbuf,
 				 gpointer node_data)
 {
 	return e_tree_model_node_insert (etree, parent,
 					 g_node_child_position (parent, sibling),
-					 opened_pixbuf, closed_pixbuf,
 					 node_data);
 }
 
diff --git a/widgets/table/e-tree-model.h b/widgets/table/e-tree-model.h
index 0a7ecdb7ed..7b8d86826f 100644
--- a/widgets/table/e-tree-model.h
+++ b/widgets/table/e-tree-model.h
@@ -39,6 +39,7 @@ typedef struct {
 	void       (*set_expanded_recurse) (ETreeModel *etm, ETreePath *node, gboolean expanded);
 	void       (*set_expanded_level)   (ETreeModel *etm, ETreePath *node, gboolean expanded, int level);
 
+	GdkPixbuf *(*icon_at)              (ETreeModel *etm, ETreePath* node);
 	ETreePath* (*node_at_row)          (ETreeModel *etm, int row);
 
 	/*
@@ -69,8 +70,8 @@ ETreePath *e_tree_model_node_get_next   (ETreeModel *etree, ETreePath *path);
 ETreePath *e_tree_model_node_get_prev   (ETreeModel *etree, ETreePath *path);
 
 /* node operations */
-ETreePath *e_tree_model_node_insert        (ETreeModel *etree, ETreePath *parent, int position, GdkPixbuf *opened_pixbuf, GdkPixbuf *closed_pixbuf, gpointer node_data);
-ETreePath *e_tree_model_node_insert_before (ETreeModel *etree, ETreePath *parent, ETreePath *sibling, GdkPixbuf *opened_pixbuf, GdkPixbuf *closed_pixbuf, gpointer node_data);
+ETreePath *e_tree_model_node_insert        (ETreeModel *etree, ETreePath *parent, int position, gpointer node_data);
+ETreePath *e_tree_model_node_insert_before (ETreeModel *etree, ETreePath *parent, ETreePath *sibling, gpointer node_data);
 gpointer   e_tree_model_node_remove        (ETreeModel *etree, ETreePath *path);
 
 /* node accessors */
@@ -85,11 +86,10 @@ guint    e_tree_model_node_depth                   (ETreeModel *etree, ETreePath
 guint    e_tree_model_node_num_visible_descendents (ETreeModel *etm, ETreePath *node);
 gpointer e_tree_model_node_get_data                (ETreeModel *etm, ETreePath *node);
 void     e_tree_model_node_set_data                (ETreeModel *etm, ETreePath *node, gpointer node_data);
-GdkPixbuf *e_tree_model_node_get_opened_pixbuf     (ETreeModel *etm, ETreePath *node);
-GdkPixbuf *e_tree_model_node_get_closed_pixbuf     (ETreeModel *etm, ETreePath *node);
 
 /* display oriented routines */
 ETreePath *e_tree_model_node_at_row           (ETreeModel *etree, int row);
+GdkPixbuf *e_tree_model_icon_of_node          (ETreeModel *etree, ETreePath *path);
 int        e_tree_model_row_of_node           (ETreeModel *etree, ETreePath *path);
 void       e_tree_model_root_node_set_visible (ETreeModel *etree, gboolean visible);
 gboolean   e_tree_model_root_node_is_visible  (ETreeModel *etree);
diff --git a/widgets/table/e-tree-simple.c b/widgets/table/e-tree-simple.c
index 9bf747a43f..e5883e6ae0 100644
--- a/widgets/table/e-tree-simple.c
+++ b/widgets/table/e-tree-simple.c
@@ -23,6 +23,14 @@ simple_value_at (ETreeModel *etm, ETreePath *node, int col)
 	return simple->value_at (etm, node, col, simple->model_data);
 }
 
+static GdkPixbuf *
+simple_icon_at (ETreeModel *etm, ETreePath *node)
+{
+	ETreeSimple *simple = E_TREE_SIMPLE(etm);
+
+	return simple->icon_at (etm, node, simple->model_data);
+}
+
 static void
 simple_set_value_at (ETreeModel *etm, ETreePath *node, int col, const void *val)
 {
@@ -44,6 +52,7 @@ e_tree_simple_class_init (GtkObjectClass *object_class)
 {
 	ETreeModelClass *model_class = (ETreeModelClass *) object_class;
 
+	model_class->icon_at = simple_icon_at;
 	model_class->value_at = simple_value_at;
 	model_class->set_value_at = simple_set_value_at;
 	model_class->is_editable = simple_is_editable;
@@ -52,7 +61,8 @@ e_tree_simple_class_init (GtkObjectClass *object_class)
 E_MAKE_TYPE(e_tree_simple, "ETreeSimple", ETreeSimple, e_tree_simple_class_init, NULL, PARENT_TYPE)
 
 ETreeModel *
-e_tree_simple_new (ETreeSimpleValueAtFn value_at,
+e_tree_simple_new (ETreeSimpleIconAtFn icon_at,
+		   ETreeSimpleValueAtFn value_at,
 		   ETreeSimpleSetValueAtFn set_value_at,
 		   ETreeSimpleIsEditableFn is_editable,
 		   gpointer model_data)
@@ -63,6 +73,7 @@ e_tree_simple_new (ETreeSimpleValueAtFn value_at,
 
 	e_tree_model_construct (E_TREE_MODEL (etg));
 
+	etg->icon_at = icon_at;
 	etg->value_at = value_at;
 	etg->set_value_at = set_value_at;
 	etg->is_editable = is_editable;
diff --git a/widgets/table/e-tree-simple.h b/widgets/table/e-tree-simple.h
index 6820b14673..edda53e82d 100644
--- a/widgets/table/e-tree-simple.h
+++ b/widgets/table/e-tree-simple.h
@@ -12,13 +12,15 @@
 #define E_IS_TREE_SIMPLE_CLASS(k) (GTK_CHECK_CLASS_TYPE ((k), E_TREE_SIMPLE_TYPE))
 
 
-typedef void*    (*ETreeSimpleValueAtFn)    (ETreeModel *etree, ETreePath *path, int col, void *model_data);
-typedef void     (*ETreeSimpleSetValueAtFn) (ETreeModel *etree, ETreePath *path, int col, const void *val, void *model_data);
-typedef gboolean (*ETreeSimpleIsEditableFn) (ETreeModel *etree, ETreePath *path, int col, void *model_data);
+typedef GdkPixbuf* (*ETreeSimpleIconAtFn)     (ETreeModel *etree, ETreePath *path, void *model_data);
+typedef void*      (*ETreeSimpleValueAtFn)    (ETreeModel *etree, ETreePath *path, int col, void *model_data);
+typedef void       (*ETreeSimpleSetValueAtFn) (ETreeModel *etree, ETreePath *path, int col, const void *val, void *model_data);
+typedef gboolean   (*ETreeSimpleIsEditableFn) (ETreeModel *etree, ETreePath *path, int col, void *model_data);
 
 typedef struct {
 	ETreeModel parent;
 
+	ETreeSimpleIconAtFn icon_at;
 	ETreeSimpleValueAtFn value_at;
 	ETreeSimpleSetValueAtFn set_value_at;
 	ETreeSimpleIsEditableFn is_editable;
@@ -32,7 +34,8 @@ typedef struct {
 
 GtkType e_tree_simple_get_type (void);
 
-ETreeModel *e_tree_simple_new (ETreeSimpleValueAtFn value_at,
+ETreeModel *e_tree_simple_new (ETreeSimpleIconAtFn icon_at,
+			       ETreeSimpleValueAtFn value_at,
 			       ETreeSimpleSetValueAtFn set_value_at,
 			       ETreeSimpleIsEditableFn is_editable,
 			       gpointer model_data);