GtkFileFilter::add_pattern

Use the method when you want to restrict the files to be displayed on the basis of their names. The pattern that you pass as an argument should a shell style glob, that is, a minimalist regular expression that specifies what range of names you wish to match.

For example,

$x = new GtkFileFilter(); $x->add_pattern("*conf");

will list allow the file filter to display only those files that end with conf.