Size of scrolled window

[José Romildo Malaquias <j romildo gmail com>]

Hello.

One dialog of an application uses a tree view widget based on a
list store. The tree view is inside a scrolled window with
PolicyNever and PolicyAutomatic policies for the respective
horizontal and vertical scrollbars. See attached image.

How can I automatically get the dialog height large enough to
show as much of the tree view lines as possible, without using
the vertical scrollbar?

Regards.

José Romildo