[Joerg Lehmann <joergl@us...>]

Hi Michael,

On 15.10.09, Michael J Gruber wrote:
> I know that one, but is style.linewidth() an instance of trafo.trafo,
> canvas.clip, style.strokestyle or style.fillstyle? I tried anyways, and
> it worked, of course, because of the way attrs are handed down.

It's an instance of style.strokestyle.

On 15.10.09, Michael J Gruber wrote:
> from pyx import *
>·
> c = canvas.canvas()
> c2 = canvas.canvas()
>·
> c.stroke(path.line(0,0,0,1))
> c2.stroke(path.line(1,0,1,1))
> c2.stroke(path.line(2,0,2,1), [style.linewidth(0.2)])
>·
> c.insert(c2, [style.linewidth(0.4)])
>·
> c.stroke(path.line(3,0,3,1))
> c2.stroke(path.line(4,0,4,1))
>·
> c.writePDFfile(__file__[:-3])
>·
> How many (even long time) users will get it right?

Hey, but that should all be obvious :-)

(i) Setting PS attributes is done via the usual PS operators
encapsulated in a gsave/grestore pair. The "last" operator of course takes
precedence.

(ii) There are no copies what so ever involved, so it doesn't matter
when - i.e. before or after inserting it - you modifiy the contents
of a canvas.


> I thought the line at 2 has width 0.4 (because of the order of
> "assignments" of linewidths) and wasn't sure whether the one at 4
> would
> appear. But I remembered experimenting once with the difference
> between
> inserting a canvas, a copy of a canvas and a *deep* copy of a canvas,
> which explains this.

As I said above, there is no copy happening at all!

Best,

        Jörg