gtk:font-chooser-font-map (fontchooser)

fontchooser -- a gtk:font-chooser widget
fontmap -- a pango:font-map object, or nil

Accessor of the Pango font map of the font chooser widget. The gtk:font-chooser-font-map function gets the custom font map of the font chooser widget, or nil if it does not have one. The (setf gtk:font-chooser-font-map) function sets a custom font map to use for the font chooser widget. A custom font map can be used to present application specific fonts instead of or in addition to the normal system fonts. The example from the C documentation uses the Fontconfig library for configuring and customizing font access. This library is not available for the Lisp binding.

FcConfig *config;
PangoFontMap *fontmap;


config = FcInitLoadConfigAndFonts ();
FcConfigAppFontAddFile (config, my_app_font_file);


fontmap = pango_cairo_font_map_new_for_font_type (CAIRO_FONT_TYPE_FT);
pango_fc_font_map_set_config (PANGO_FC_FONT_MAP (fontmap), config);


gtk_font_chooser_set_font_map (font_chooser, fontmap);    

Note that other GTK widgets will only be able to use the application specific font if it is present in the font map they use. The following code updates the font map for a gtk:label widget with fontmap.

(setf (pango:context-font-map (gtk:widget-pango-context label)) fontmap)