gtk:cell-area-context-preferred-height (context)

context -- a gtk:cell-area-context object

minimum-height -- an integer with the minimum height, or nil
natural-height -- an integer with the natural height, or nil

Gets the accumulative preferred height for all rows which have been requested with this context. After the gtk:cell-area-context-reset function is called and/or before ever requesting the size of a gtk:cell-area object, the returned values are 0.