Motivation for having a 'text color' that is invisible

[christian ridderstrom gmail com]

Hi,

I'm not sure if the following use case for why an 'invisble' text colour 
is needed, but I have a vague memory that one was needed from a long time 
back. The use case should probably be added to a bugzilla issue, but I'd 
like to mention it here first (and maybe someone can remember which 
issue..).

Here's the use case.  I wanted to draw a timing diagram, and used the 
Chronogram block. However, that block automatically shows various numbers 
and I want to have arbitrary text instead of numbers.  The solution I 
chose now was to set the text colour to the same value as that of the 
background.  This will however not work if the background varies, or if it 
is later changed.

So to summarize, this is a situation when I would have like to be able to 
set the colour of the text to 'invisible'.

I hope the description of the use case makes sense, and if there are other 
solutions please let me know.

Best regards
/Christian

--
Christian Ridderström, +46-8-768 39 44               http://www.md.kth.se/~chr