CDK selection widget and aligning text

[TheLonelyStar]

I use the cdk selection widget to display a list information.
I want to organize the information in columns (first name, last name e.t.c).

How to do that? I wrote a function which makes a string to a fixed size by
adding spaces or removing characters from the end.
string fix_size(string s,int size);

That way, I can build my table like this:
row[i]=fix_size(first_name[i],30)+"|"+fix_size(last_name[i],30)+"|"+...

The trouble is, I use UTF-8 characters (umlaute in example). And how to not
know how to count the displayed string length ...

How would you do this?
Thanks
Nathan
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