The pango-underline enumeration is used to specify whether text should be underlined, and if so, the type of underlining.

(define-g-enum "PangoUnderline" pango-underline
  (:export t
   :type-initializer "pango_underline_get_type")
  (:none 0)
  (:single 1)
  (:double 2)
  (:low 3)
  (:error 4)
  (:single-line 5)
  (:double-line 6)
  (:error-line 7))  

:none

No underline should be drawn.

:single

A single underline should be drawn.

:double

A double underline should be drawn.

:low

A single underline should be drawn at a position beneath the ink extents of the text being underlined. This should be used only for underlining single characters, such as for keyboard accelerators. The :single value should be used for extended portions of text.

:error

A wavy underline should be drawn below. This underline is typically used to indicate an error such as a possible mispelling. In some cases a contrasting color may automatically be used.

:single-line

Like the :single value, but drawn continuously across multiple runs. Since 1.46

:double-line

Like the :double value, but drawn continuously across multiple runs. Since 1.46

:error-line

Like the :error value, but drawn continuously across multiple runs. Since 1.46