RE: EXTERNAL: Re: Gtk2::SpinButton For Hex

["Williams, James P2" <james p2 williams lmco com>]

> > > > How can I use a Gtk2::SpinButton to prompt for an integer expressed in hex?  I've tried the following, 
> > > > but it fails.
> > > >
> > > > ...
> > > >
> > > > The text appears to be correct while I hold either arrow button down; I see hex values incrementing.  
> > > > However, single clicks of an arrow button fail if the displayed text contains A-F.  Hitting the Enter 
> > > > key also fails on the same values.  In both cases, the text changes to a decimal integer.
> > >
> > > What do the '$value's look like in the outputCB (either in a debugger or ...).
> >
> > With single clicks of the up arrow button, the values in outputCB() increment from 0 to 10.  10 correctly 
> > displays as A.  One more click of the up arrow calls outputCB() twice for some reason, the first time 
> > with a value of 0, and the second with a value of 1.  So visibly, 10 wraps to 1 instead of 11, or B.  If 
> > I manually type 'FF' and hit the Enter key, outputCB() is called with a value of 0.  I've played with 
> > callbacks on the 'input' and 'changed' signals too, but nothing has worked so far.
> >
> > I learned something else.  If I change the sprintf() to use '0x%X' instead of '%X', it seems to work.  It 
> > also works in octal with '0%o' and binary with '0b%b'.
> >
> > Unfortunately, the '0x' prefix is unacceptable to my users.  Grr.  So I'm still in search of a way to 
> > spin a hex value, but with no '0x'.  Knowing this about the prefix, though, still may be useful to others 
> > wanting something similar.
>
> Hi Jim
>
> If that is the case can you not use chain the sprintf through substr?
>
> e.g.
>
> >       $spin->set_text(substr (sprintf '0x%X',$value), 2);
>
> which will drop the first 2 characters of the string that is printed > by sprintf?

That's the same as what I had originally, which failed.

   $spin->set_text(sprintf('%X',$value));

Gtk2::SpinButton seems to spin hex values fine if the "0x" is in the string.  Your substr() version and my 
original fail, I think, because the "0x" is missing.  My users, of course, don't want to type the "0x" since 
the input is always hex, and it's really a programming convention; not something for a user interface.

Thanks.

Jim