gtk:aspect-frame-new (label xalign yalign ratio obey-child)

label -- a string for the label text
xalign -- a number coerced to a single float for the horizontal alignment of the child within the allocation of the aspect frame, this ranges from 0.0 (left aligned) to 1.0 (right aligned)
yalign -- a number coerced to a single float for the vertical alignment of the child within the allocation of the aspect frame, this ranges from 0.0 (left aligned) to 1.0 (right aligned)
ratio -- a number coerced to a single float for the desired aspect ratio
obey-child -- if true, ratio is ignored, and the aspect ratio is taken from the requistion of the child

The new gtk:aspect-frame widget.

Create a new aspect frame container.