Re: Goo::Canvas::Polyline acts not as expected

[Jeremy Volkening <volkening mailshack com>]

On Thu, 2010-04-22 at 05:39 +0000, Xi Yang wrote:
> Hi everyone:
>
> I tried to use Polyline to make a part of another complexed widget.
> However, it seems the Polyline object always use its north-west of
> boundingbox as its (0,0) point. For instance:
>
> ###################################
>
> my $sz = 10;
>
> my $coll_anchor = Goo::Canvas::Polyline->new(
>         $self,
>         TRUE,
>         [0,$sz,$sz,0,0,-$sz,-$sz,0],
> );
>
> ###################################
>
> I expect this should draw a diamond, with its center on (0,0) point.


It works for me as expected. I don't suppose you've set these two
properties on your canvas at some point:

$canvas->set(
    'automatic-bounds'   => TRUE,
    'bounds-from-origin' => FALSE,
)

This would cause the canvas to automatically adjust to fit your drawing.
Your diamond would still be centered at (0,0), but (0,0) would no longer
be in the top-left corner of the canvas.

Jeremy