Re: The syntax of Gnome2::Canvas::Line?

[Sergei Steshenko <sergstesh yahoo com>]

Applications From Scratch: http://appsfromscratch.berlios.de/


--- On Sat, 6/14/08, walt <wa1ter myrealbox com> wrote:

> From: walt <wa1ter myrealbox com>
> Subject: The syntax of Gnome2::Canvas::Line?
> To: gtk-perl-list gnome org
> Date: Saturday, June 14, 2008, 7:57 AM
> Hi list,
>
> This is an example from the tarball of how to draw a line:
>
> Gnome2::Canvas::Item->new ($group,
>                          'Gnome2::Canvas::Line',
>                          points => [200.0, 0.0, 200.0,
> 450.0],
>                          fill_color => 'black',
>                          width_units => 4.0);
>
> My puzzle is why the syntax is any different from
> Rectangle, i.e.
> why use 'points' instead of x1,y1,x2,y2?
>
> Second, the use of brackets instead of () to describe
> points is
> a complete surprise to me.  I'm new to perl and
> I've never seen
> that syntax used in any of the perldocs I've read (so
> far).
> What's the difference in this context between [] and
> ()?
>
> Thanks.
>
> _______________________________________________
> gtk-perl-list mailing list
> gtk-perl-list gnome org
> http://mail.gnome.org/mailman/listinfo/gtk-perl-list


(...) means list; [...] means anonymous array reference.

You'll have to read a tutorial on Perl references, but before you need
to understand Perl in its referenceless part.

Probably dealing with GUI stuff is too complex for a newbie.

Regards,
  Sergei.