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.

> sprint - should be sprintf?

Sorry about the "sprint".  We're on a closed network; that was a transcription typo.

> Maybe try set_value or set_digits rather than set_text?

I think I have to call set_text() to see the hex version in the entry.  I have tried calling set_value() too, 
both before and after set_text().  That gives me the same behavior:  spinning seems to work, but single 
clicks wrap to 0 or 1 as soon as I reach a number containing [A-F]+.

On set_digits(), I'm spinning integers, so I've left it at the default, 0.  It wouldn't make sense being any 
other value, if I understand its purpose.

> How are any of these impacted by the set_numeric statement?

I've set this to FALSE, since I have to allow A-F to be typed into the entry.  Otherwise, those key events 
are ignored.

Thanks for any other ideas you may have.

Jim

-----Original Message-----
From: Robert Wilkinson [mailto:bob fourtheye org] 
Sent: Wednesday, May 20, 2015 3:12 AM
To: Williams, James P2
Cc: 'gtk-perl-list gnome org'
Subject: EXTERNAL: Re: Gtk2::SpinButton For Hex

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