The PangoUnderline enumeration is used to specify whether text should be underlined, and if so, the type of underlining.
|0||Pango::UNDERLINE_NONE||no underline should be drawn.|
|1||Pango::UNDERLINE_SINGLE||a single underline should be drawn.|
|2||Pango::UNDERLINE_DOUBLE||a double underline should be drawn.|
|3||Pango::UNDERLINE_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. Pango::UNDERLINE_SINGLE should be used for extended portions of text.|
|4||Pango::UNDERLINE_ERROR||A wavy underline should be drawn below. This underline is typically used to indicate an error such as a possilble mispelling; in some cases an contrasting color may automatically be used. This type of underlining is available since Pango 1.4.|