passing Curses object to subroutine

emilford has asked for the wisdom of the Perl Monks concerning the following question:

How would I pass a Curses::UI object to a subroutine to be updated? I've tried several methods, each failed giving me an undefined. Suppose I have the following simplified code:

my $cui = Curses::UI;
my $window = $cui->add('blahblahblah', 'Window');

# add the progressbars
$window->add('p1', 'Progressbar');
$window->add('p2', 'Progressbar');
$window->add('p3', 'Progressbar');
[download]

How would I pass $window to a subroutine and then use that passed value as $window->getobj('p3')->{-text}="BlahBlahBlah" to update p3's text? I've tried passing it as a scalar and as a reference. Am I missing something?

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Re: passing Curses object to subroutine by kvale (Monsignor) on Apr 13, 2004 at 22:48 UTC
Your constructor should be `my $cui = new Curses::UI;` [download] This problem would stop the rest of your code in its tracks. Most (all?) objects are references, so passing them by value to subroutines should allow you to invoke methods on them while in the sub. -Mark	[reply] [d/l]
Re: Re: passing Curses object to subroutine by emilford (Friar) on Apr 14, 2004 at 01:35 UTC
In my actual code, I do use the `new` construct. My mistake. My code works fine until I attempt `$window->getobj('p3')->{-text} = "Something";` on a variable passed to a subroutine as `&UpdateP3($window)`. I get an error stating 'getobj' can't be used/called on an undefined variable. If all objects are references, I should be able to pass it to a subroutine and invoke the getobj method, right?	[reply] [d/l] [select]
Re: Re: Re: passing Curses object to subroutine by BUU (Prior) on Apr 14, 2004 at 02:31 UTC
The syntax you describe sounds valid (drop the & though, it does funky stuff), so you've probably screwed up actually doing it. I can't guess where or how though without seeing a small sample case that demonstrates the problem.	[reply]
Re: passing Curses object to subroutine by gmpassos (Priest) on Apr 14, 2004 at 05:56 UTC
Hummm, how about show to us how you call this subroutine, and how it receives the object. I will be waiting the reply... Graciliano M. P. "Creativity is the expression of the liberty".	[reply]