void IconDataFunc(TreeViewColumn column,
CellRenderer renderer,
TreeModel model,
TreeIter iter)
{
var value = new GLib.Value();
model.GetValue(iter, 0, ref value);
var tag_id = (uint)value;
var tag = tag_store.Get(tag_id) as Tag;
if (tag.SizedIcon != null)
{
(renderer as CellRendererPixbuf).Pixbuf = tag.SizedIcon;
}
else
{
(renderer as CellRendererPixbuf).Pixbuf = empty_pixbuf;
}
}
