Re: Some questions about func_data things.

[Chas Owens <alas widomaker com>]

Quoting Christian Hamar <krics linuxforum hu>:

> hi there. 
>
> So i create a thing like this :
>
> $gh = "first";
> $button = new Gtk2::Button("something");
> $button->signal_connect('clicked' => \&do, $gh);
>
> sub do {
>       my ($tmp) = @_;
>       print "tmp - $tmp\n";
> }
>
> So. I don't know. Is this the right way to "apply" a func_data thing to
> signal_connect ? If this is the right way then my question:
> When the script running then i got this:
> tmp - HASH(0x34252525)    or something else hash value. How can i catch
> the $gh value that i specified for func_data ??? 
>
> A little example plz. many thx.
>
> Best regards: Christian Hamar alias kRiX

You need to say 

my ($button, $tmp) = @_;

The first argument is always the widget responsible for the event.  Personally I
always say

$button->signal_connect(
        'clicked' => sub {
                do($gh)
        }
);

since I can't remember where user data winds up when there are other arguments.