On Sat, Jul 11, 2009 at 12:15 PM, muppet <sc...@asofyet.org> wrote: > > On Jul 11, 2009, at 10:58 AM, Joseph Thames wrote: > > Hello, >> >> I am confused about your use of $data=undef in the Glib documentation, as >> in: >> > > unsigned = $instance->signal_connect ($detailed_signal, $callback, >> $data=undef) >> • $detailed_signal (string) >> • $callback (subroutine) >> • $data (scalar) arbitrary data to be passed to each invocation of >> callback >> > > Does this simply mean that undef (NULL) is the default value of the $data >> parameter, or does it mean that passing unique user_data to a callback is >> not yet supported in this API? >> > > Yes, it means that if you don't specify that argument, it will be treated > as though you passed undef. The syntax is borrowed from C++'s default > parameters. >
I thought so, thanks for confirming that. > > > I am trying to figure out a way to employ a common callback function for >> an "unlimited" number of menu items (determined at run-time) by passing >> unique user_data for each signal. >> >> This does not seem to be supported by the $builder->connect_signals >> method, which can only pass the same user_data to a group of unique callback >> functions. >> > > Your single callback is free to inspect the widget / object names (as set > in the xml) and dispatch to the correct place based on that. Ok, now I understand. I think I was misled by most of the examples, which all seem to show callbacks statically the same as the Glade-specified menuitem names. Thanks again. > > > > -- > Doing a good job around here is like wetting your pants in a dark suit; you > get a warm feeling, but no one notices. > -- unknown > > > -- Joseph 'Bear' Thames Meta Science Foundation (505) 977-9024 - Cell Phone beart...@gmail.com
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