gtk-cell-renderer-preferred-width-for-height (cell widget height)

cell -- a gtk-cell-renderer object
widget -- the gtk-widget object this cell renderer will be rendering to
height -- an integer with the size which is available for allocation

minimum-width -- an integer with the minimum size
natural-width -- an integer with the preferred size

Retreives a cell renderers's minimum and natural width if it were rendered to widget with the specified height.