This is a feature planned feature for the next version.
Something similar like tools and his observers for the Glyph View but enhanced for Space Center.

(see http://cl.ly/ExxK :)

It is possible but it will be with some detours….

Everything is depending on the font you want to use and the character unicode mapping inside that font.

you can use something similar:

## this is used internally to split inputted text to a list of glyph names based on the current font
from lib.UI.spaceCenter.glyphSequenceEditText import splitText
from robofab.interface.all.dialogs import AskString

## get some text
text = AskString("input")
print "input:", text

font = CurrentFont()

## the character map
cmap = font.getCharacterMapping()

## split the text based on the camp in to a list of glyph names
glyphNameList = splitText(text, cmap)

print "as glyph names list:", glyphNameList

## loop over the glyph names asks for their unicode value in the current font
## convert it back to text based on that unicode value
backToText = u""
for glyphName in glyphNameList:
    if glyphName in font:
        glyph = font[glyphName]
        if glyph.unicode is not None:
            backToText += u"%s" %(unichr(glyph.unicode))
        else:
            backToText += "/%s " %glyphName    
    else:
        backToText += "/%s " %glyphName

print "backtoText:", backToText

hope this makes sense.

mmmm, oke

Im kind of guessing what you want to achieve but maybe this can help to.

A SpaceCenter object also has a setRaw and getRaw methods, expecting a string, text as input or return.

from robofab.interface.all.dialogs import AskString
from mojo.UI import CurrentSpaceCenter

sp = CurrentSpaceCenter()

text = AskString("input")
sp.setRaw(text)

(Ive just updated http://doc.robofont.com/api/mojo/mojo-ui/ with getRaw and setRaw)