Re: a couple of Gnome2::Canvas problems

[zentara <zentara zentara net>]

On Wed, 13 Jul 2005 08:30:31 -0400
muppet <scott asofyet org> wrote:

> On Jul 11, 2005, at 12:58 PM, zentara wrote:
>
> > I'm trying to make a simple gauge with the Gnome2::Canvas.
> > It all works well, except when I destroy the meter.  I get an error
> >
> > nomeCanvas-CRITICAL **: file gnome-canvas.c: line 3698  
> > (gnome_canvas_request_redraw): assertion `GNOME_IS_CANVAS (canvas)'  
> > failed during global destruction.

> Simple solution -- clear your own item references just before  
> destroying the canvas.
>
>
> > ###########################################################3
> > sub delete_event {
>
>     # clear our item references, so things can die in peace.
>     $text = undef;
>     $box = undef;
>     $hub = undef;
>     $gauge = undef;
>     $floor = undef;
>     $needle = undef;
>
> >     $watch->Unwatch;
> >     $canvas->destroy;
> >     Gtk2->main_quit;
> >     return 0;
> > }

Thanks, I did try $text->destroy,etc, but no luck. I should have thought of
undef.

By the way, I also found the way to clip the bottom of the gauge circle,
.......just put the canvas into a vbox......doh!!!.

my $vbox = Gtk2::VBox->new( FALSE, 6 );
$window->add($vbox);
$vbox->set_border_width(2);

my $canvas = Gnome2::Canvas->new_aa();
$canvas->set_size_request($width,$height);
$canvas->set_scroll_region( 0, 0, $width, $height );   #to get upper left corner 
$canvas->set_size_request( $width, $height ); #useless ? 

$vbox->pack_start($canvas,FALSE,FALSE,0);
$window->show_all;


Thanks again.


-- 
I'm not really a human, but I play one on earth.
http://zentara.net/japh.html