public void BeginRenameSource (Source source)
{
TreeIter iter = store.FindSource (source);
if (iter.Equals (TreeIter.Zero)) {
return;
}
source_renderer.Editable = true;
using (var path = store.GetPath (iter)) {
SetCursor (path, source_column, true);
}
source_renderer.Editable = false;
}