[Chicken-users] Re: (address->pointer)

[felix winkelmann]

On 5/8/07, William Ramsay <address@hidden> wrote:
> Hi Felix,
>
> Using (address->pointer number) does indeed do what I want.    It allows
> me to
> pick up a user supplied integer in my  "define-external" code.
> However, it has
> a rather bad side-effect.    The code is handled in a dialog box.   Using
>
>     (g_signal_connect cbut "color-set" #$setColor (address->pointer 1))
>
> will send a 1 to setColor, but it also wipes out my dialog pointer and
> crashes the
> system on Cancel or Save when I try to destroy it.
>
> Using   (g_signal_connect cbut "color-set" #$setColor #f) works fine.
> Adding
> (address->pointer 1) is the only  difference.

Sorry, but what exactly is expected in the g_signal_connect call?
As I understand it, the last argument is an arbitrary pointer (userdata)
pass to the callback uninterpreted. If the callback (setColor) just
prints the number, shouldn't it work.

I apologize for being such a Gtk dolt, but I'm just guessing here.


cheers,
felix