Bug #81670 for Wx: Wx::Frame weaken away when ->Close()

Mon Dec 03 16:48:46 2012 user42 [...] zip.com.au - Ticket created

Subject:	Wx::Frame weaken away when ->Close()
Date:	Tue, 04 Dec 2012 08:48:58 +1100
To:	bug-Wx [...] rt.cpan.org
From:	Kevin Ryde <user42 [...] zip.com.au>

Under a gtk build, a Wx::Frame $frame->Close seems to be enough to make the $frame object weaken away. The program foo.pl below prints "undef". Under mswin it looks like that might not be so. Ie. the foo.pl would print a Wx::Frame object, not undef. Alas I don't have an mswin to try, so this is just based on cpantesters failures I had in a pod browser main window. Is a $frame->Close meant to be enough for the object to weaken away? Or have I misunderstood Close() vs Destroy() methods?

use 5.008; use strict; use warnings; use Scalar::Util; use Wx; my $app = Wx::SimpleApp->new; my $frame = Wx::Frame->new; $frame->Show; $frame->Close; $app->Yield; Scalar::Util::weaken ($frame); print $frame||'undef',"\n";

Mon Dec 03 20:58:18 2012 mark.dootson [...] znix.com - Correspondence added

Subject:	Re: [rt.cpan.org #81670] Wx::Frame weaken away when ->Close()
Date:	Tue, 04 Dec 2012 01:57:45 +0000
To:	bug-Wx [...] rt.cpan.org
From:	Mark Dootson <mark.dootson [...] znix.com>

On 03/12/2012 21:48, Kevin Ryde via RT wrote: Show quoted text

> Under a gtk build, a Wx::Frame $frame->Close seems to be enough to make > the $frame object weaken away. The program foo.pl below prints "undef". > > Under mswin it looks like that might not be so. Ie. the foo.pl would > print a Wx::Frame object, not undef. > > Alas I don't have an mswin to try, so this is just based on cpantesters > failures I had in a pod browser main window. > > Is a $frame->Close meant to be enough for the object to weaken away? > Or have I misunderstood Close() vs Destroy() methods?

$frame->Close simply generates an EVT_CLOSE so it all depends what is in your (or the default) EVT_CLOSE handler. To remove a top level window from the application, use $frame->Destroy - but note that as it says in the wxWidgets docs, window destruction will take place a some point - not necessarily 'now'. So I would guess that you have misunderstood "$frame->Destroy". Probably because "Destroy" is an odd name for a method that closes the frame gracefully after ensuring all events are handled etc. :-) Regards Mark

Mon Dec 03 20:58:19 2012 The RT System itself - Status changed from 'new' to 'open'

Thu Dec 06 17:26:09 2012 user42 [...] zip.com.au - Correspondence added

Subject:	Re: [rt.cpan.org #81670] Wx::Frame weaken away when ->Close()
Date:	Fri, 07 Dec 2012 09:25:45 +1100
To:	bug-Wx [...] rt.cpan.org
From:	Kevin Ryde <user42 [...] zip.com.au>

"Mark Dootson via RT" <bug-Wx@rt.cpan.org> writes: Show quoted text

> > $frame->Close simply generates an EVT_CLOSE so it all depends what is in > your (or the default) EVT_CLOSE handler.

Thanks, I'll do a destroy from there ... I think I want to destroy on close if that's not already the default. Seems subtle that it should vary between gtk and mswin, but that would be wx rather than perl presumably.

Sat Jan 19 02:07:28 2013 mdootson [...] cpan.org - Correspondence added

I have closed the ticket, if that is OK, as this isn't really a bug. Many thanks On Thu Dec 06 17:26:09 2012, user42@zip.com.au wrote: Show quoted text

> "Mark Dootson via RT" <bug-Wx@rt.cpan.org> writes:

> > > > $frame->Close simply generates an EVT_CLOSE so it all depends what

is in Show quoted text

> > your (or the default) EVT_CLOSE handler.

> > Thanks, I'll do a destroy from there ... I think I want to destroy on > close if that's not already the default. Seems subtle that it should > vary between gtk and mswin, but that would be wx rather than perl > presumably.

Sat Jan 19 02:07:29 2013 mdootson [...] cpan.org - Status changed from 'open' to 'rejected'