ScrolledWindow.setPolicy

Sets the scrollbar policy for the horizontal and vertical scrollbars.

The policy determines when the scrollbar should appear; it is a value from the #GtkPolicyType enumeration. If [gtk.types.PolicyType.Always], the scrollbar is always present; if [gtk.types.PolicyType.Never], the scrollbar is never present; if [gtk.types.PolicyType.Automatic], the scrollbar is present only if needed (that is, if the slider part of the bar would be smaller than the trough — the display is larger than the page size).