The gtk-font-chooser-level flags specifies the granularity of font selection that is desired in a font chooser.

These flags may be extended in the future. Applications should ignore unknown values.

(define-g-flags "GtkFontChooserLevel" gtk-font-chooser-level
  (:export t
   :type-initializer "gtk_font_chooser_level_get_type")
  (:family 0)
  (:style      #.(ash 1 0))
  (:size       #.(ash 1 1))
  (:variations #.(ash 1 2))
  (:features   #.(ash 1 3)))  

:family

Allow selecting a font family.

:style

Allow selecting a specific font face.

:size

Allow selecting a specific font size.

:variations

Allow changing OpenType font variation axes.

:features

Allow selecting specific OpenType font features.