[evolution] Add em_folder_tree_new_with_model().

[Matthew Barnes <mbarnes src gnome org>]

commit c961b23dcd1aca98566b3bc0e1d6fe1d2c6c29fb
Author: Matthew Barnes <mbarnes redhat com>
Date:   Tue Aug 9 21:38:06 2011 -0400

    Add em_folder_tree_new_with_model().
    
    This is so an EMFolderTree can be created with a custom model, such as
    perhaps only a subset of available stores added.

 mail/em-folder-tree.c |   16 +++++++++++++++-
 mail/em-folder-tree.h |    3 +++
 2 files changed, 18 insertions(+), 1 deletions(-)
---
diff --git a/mail/em-folder-tree.c b/mail/em-folder-tree.c
index 26c08fe..eb7b3e4 100644
--- a/mail/em-folder-tree.c
+++ b/mail/em-folder-tree.c
@@ -1779,13 +1779,27 @@ em_folder_tree_new (EMailBackend *backend,
                     EAlertSink *alert_sink)
 {
 	EMFolderTreeModel *model;
+
+	g_return_val_if_fail (E_IS_MAIL_BACKEND (backend), NULL);
+	g_return_val_if_fail (E_IS_ALERT_SINK (alert_sink), NULL);
+
+	model = em_folder_tree_model_get_default ();
+
+	return em_folder_tree_new_with_model (backend, alert_sink, model);
+}
+
+GtkWidget *
+em_folder_tree_new_with_model (EMailBackend *backend,
+                               EAlertSink *alert_sink,
+                               EMFolderTreeModel *model)
+{
 	EMailSession *session;
 	const gchar *data_dir;
 
 	g_return_val_if_fail (E_IS_MAIL_BACKEND (backend), NULL);
 	g_return_val_if_fail (E_IS_ALERT_SINK (alert_sink), NULL);
+	g_return_val_if_fail (EM_IS_FOLDER_TREE_MODEL (model), NULL);
 
-	model = em_folder_tree_model_get_default ();
 	session = e_mail_backend_get_session (backend);
 	data_dir = e_shell_backend_get_data_dir (E_SHELL_BACKEND (backend));
 
diff --git a/mail/em-folder-tree.h b/mail/em-folder-tree.h
index b351714..eeea8df 100644
--- a/mail/em-folder-tree.h
+++ b/mail/em-folder-tree.h
@@ -92,6 +92,9 @@ struct _EMFolderTreeClass {
 GType		em_folder_tree_get_type		(void);
 GtkWidget *	em_folder_tree_new		(EMailBackend *backend,
 						 EAlertSink *alert_sink);
+GtkWidget *	em_folder_tree_new_with_model	(EMailBackend *backend,
+						 EAlertSink *alert_sink,
+						 EMFolderTreeModel *model);
 EActivity *	em_folder_tree_new_activity	(EMFolderTree *folder_tree);
 PangoEllipsizeMode
 		em_folder_tree_get_ellipsize	(EMFolderTree *folder_tree);