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From: Gerhard Reithofer on 18 Jul 2010 09:19
On Sat, 17 Jul 2010, Joe English wrote:

> Gerhard Reithofer wrote:
> > once more I found a tcl script which fails due to new "standard" tk*
> > font names.
> >
> > Example:
> > pack [text .t]
> > set cfont [.t cget -font]
> > .t insert end "Hello World!"
> > .t configure -font "$cfont bold"
> >
> > This works in Tcl 8.4 but fails in Tcl 8.5 with the error message:
> > expected integer but got "bold"
>
> Note that this would also have failed under Tk 8.4
> if (for instance) the user had set something like:
>
> *Text.font: -adobe-courier-bold-o-normal--12-120-75-75-m-70-iso8859-1

I'm rather sure, that this is no "default font", isn't it?

> in the X resource database.
>
> The recommended way to generate modified versions of other fonts is:
>
> set newFont [dict replace [font actual $oldFont] -weight bold]
>
> (or, for pre-8.5 versions, the obvious dict-free equivalent
> using [array set] / [array get])

Thanks (also to Aric Bills) for the description how it should be used.

> This works no matter how the font was originally specified --
> named fonts, platform-specific fonts, XLFD fonts, "shorthand"
> "family ?size? ?style...?" specifications and -option/-value lists.
> [set newFont "$oldFont bold"] has always been fragile; it
> only used to work by accident.

That's what I wanted to hear, thank you.

> > The reason is, that 8.4 text default font is "Courier -12" in my
> > Linux environment and in 8.5 it's "TkFixedFont" without size value.
>
> Alternately, if you know you want "Courier -12 bold", you could
> just say "Courier -12 bold"...

I (personaly) didn't want a specific font but this "buggy method" I've
seen several times for switching the "current font" to bold.

Thanks for all the answers - I'm more wise again after asking here ;)

--
Gerhard Reithofer
Tech-EDV Support Forum - http://support.tech-edv.co.at
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