On Wed, May 20, 2015 at 05:23:53PM +0000, Williams, James P2 wrote:
> >> 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?
Bob
<SNIP>
> On Tue, May 19, 2015 at 10:22:51PM +0000, Williams, James P2 wrote:
> > How can I use a Gtk2::SpinButton to prompt for an integer expressed in hex?
> > I've tried the following, but it fails.
> >
> > use strict;
> > use warnings;
> >
> > use Glib qw(TRUE FALSE);
> > use Gtk2 qw(-init);
> >
> > my($spin)=Gtk2::SpinButton->new_with_range(0,1000,1);
> > $spin->set_numeric(FALSE);
> > $spin->signal_connect(output => \&outputCB);
> >
> > my($win)=new Gtk2::Window();
> > $win->add($spin);
> > $win->show_all();
> >
> > Gtk2->main();
> >
> > sub outputCB
> > {
> > my($spin)=@_;
> > my($value)=$spin->get_adjustment()->get_value();
> >
> > $spin->set_text(sprint '%X',$value);
> > }
> >
> > 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.
> >
> > Thanks.
> >
> > Jim
> Hi Jim
>
> What do the '$value's look like in the outputCB (either in a debugger or ...).
>
> sprint - should be sprintf?
>
> Maybe try set_value or set_digits rather than set_text?
>
> How are any of these impacted by the set_numeric statement?
>
> Bob
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