Re: Directory/file browser as TreeView

[muppet <scott asofyet org>]

On Sep 28, 2006, at 1:42 AM, Ratcliffe, Jeffrey (Peters) wrote:

> > > (having to store the directory path as a hidden
> > > column seems rather hackish to me - but I couldn't work out how  
> > > to get
> > the
> > > parent from an iter)
>
> >        treeiter = $tree_model->iter_parent ($child)
>
> Thanks. I must be blind. But on reflection, what I already did is  
> certainly faster than walking back up the tree every time the path  
> needs to be checked.

It's a tradeoff of time and space.  The iterators may take slightly  
longer (i've never timed it), but storing the paths definitely takes  
more space.  And really, asking an iter for its parent doesn't take  
long at all.


> > > use constant TRUE  => 1;
> > > use constant FALSE => 0;
>
> > use Glib qw(TRUE FALSE);
>
> OK. I had always assumed that this:
> 1. loaded Glib, taking time and memory.
> 2. amounted to the same thing anyway.

Glib is already loaded when you use Gtk2.  The difference here is  
that you're modifying your script's symbol table from Glib's import  
instead of with constant.  And other gtk2-perl modules use Glib's  
TRUE and FALSE definitions, so your version is actually taking more  
time and space.  ;-)

Also, Glib actually defines FALSE as the empty string, to behave more  
like perl itself, so they're not *exactly* the same.

But, in the end, no, it doesn't *really* matter, but that's why we do  
it.




--
To me, "hajime" means "the man standing opposite you is about to hit  
you with a stick".
  -- Ian Malpass, speaking of the Japanese word for "the beginning"