Use key files for tracking widget states.

Each EShellView now maintains a GKeyFile for recording disposable widget
state such as tree view path expansion, scroll bar positions, combo box
selections, etc.  The EShellView records changes to the key file to
~/.evolution/<shell-backend>/config/state, and automatically restores
the GKeyFile at startup.

Currently only the mailer uses the key file, but it's intended to serve
all shell views.  It replaces the use of Camel "cmeta" files, as well as
"et-expanded-*" and "folder-tree-expand-state.xml" files.

Also, the mailer's folder tree model now includes a column for tracking
which sidebar folders are expanded.  Folder tree widgets appearing in
dialog windows can copy the sidebar's expanded state using
em_folder_tree_clone_expanded().

2 files changed, 37 insertions, 0 deletions

diff --git a/e-util/e-util.c b/e-util/e-util.c
index 0eaf8c39a4..55eb6eba6b 100644
--- a/e-util/e-util.c
+++ b/e-util/e-util.c
@@ -372,6 +372,41 @@ e_action_group_remove_all_actions (GtkActionGroup *action_group)
 }
 
 /**
+ * e_radio_action_get_current_action:
+ * @radio_action: a #GtkRadioAction
+ *
+ * Returns the currently active member of the group to which @radio_action
+ * belongs.
+ *
+ * Returns: the currently active group member
+ **/
+GtkRadioAction *
+e_radio_action_get_current_action (GtkRadioAction *radio_action)
+{
+	GSList *group;
+	gint current_value;
+
+	g_return_val_if_fail (GTK_IS_RADIO_ACTION (radio_action), NULL);
+
+	group = gtk_radio_action_get_group (radio_action);
+	current_value = gtk_radio_action_get_current_value (radio_action);
+
+	while (group != NULL) {
+		gint value;
+
+		radio_action = GTK_RADIO_ACTION (group->data);
+		g_object_get (radio_action, "value", &value, NULL);
+
+		if (value == current_value)
+			return radio_action;
+
+		group = g_slist_next (group);
+	}
+
+	return NULL;
+}
+
+/**
  * e_str_without_underscores:
  * @s: the string to strip underscores from.
  *
diff --git a/e-util/e-util.h b/e-util/e-util.h
index abc76359a6..33bc940df7 100644
--- a/e-util/e-util.h
+++ b/e-util/e-util.h
@@ -57,6 +57,8 @@ gint		e_action_compare_by_label	(GtkAction *action1,
 						 GtkAction *action2);
 void		e_action_group_remove_all_actions
 						(GtkActionGroup *action_group);
+GtkRadioAction *e_radio_action_get_current_action
+						(GtkRadioAction *radio_action);
 
 gchar *		e_str_without_underscores	(const gchar *s);
 gint		e_str_compare			(gconstpointer x,