font handling confusion (in gtk-demo)

I'm a bit new to Pango and Xft, so bear with me.

I recently began the process of porting an app to the new GTK (it'll be
out RSN, right?) and I needed to update some code that was using the old
GtkText widget.   Some of the text needs to be monospaced (server
responses), but I can't for the life of me figure out how to set up an
appropriate tag to achieve a "monospaced font" effect.

After looking through a variety of pages and documentation, I noticed
this in the gtk-demo source:
  if (is_source)
            font_desc = pango_font_description_from_string ("Courier

Is hardcoding a font name like "Courier 12" considered ok practice?
On my (relatively stock, wrt GTK/Xft/Pango) Debian system, gtk-demo
dispays the code examples (which are tagged by the above code) in a
proportionally-spaced font.

A simple program like this:
	gtk_init(&argc, &argv);
	dlg = gtk_font_selection_dialog_new("Select font");
shows I have no "Courier 12".

After a bit more looking around, it appears the proper thing to do is
use an alias.  In my ~/.xftconfig, I added:
  match any family = "mono" edit family += "Courier New";
and then requesting a "mono" family gives me a monspaced font.

But this requires a change on my system (and a change on every other
system).  Is there a standard ("correct") way to achieve this?
Should "Courier 12" be an alias?

      Evan Martin
martine cs washington edu

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