Enigma eTextInputField how to disable???

Taken from the enigma mount manager (part of setupnetwork.cpp)

ldir = new eTextInputField(this,lldir);
ldir->resize(eSize(320, fd+10));
	ldir->setUseableChars("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-.,:|!?/");
ldir->loadDeco();
ldir->setHelpText(_("Name of local mount point with a trailing slash"));

I would like to disable that Text input field, is there a way of doing this?
The default mount point gets set at "/mnt" if the existing key is not present.
I would like to lock the eTextInputField so that the value cannot be changed.

Any ideas?

Anyone???
I just want to make it greyed out, like in Windows - if you can get what I mean. Doesn't look like theres a method for doing it

even though I've seen it in some of the images I've tried.