Hi,
On 15.10.09, André Wobst wrote:
> Am 15.10.2009 um 10:36 schrieb Michael J Gruber:
>
>> Alan G Isaac venit, vidit, dixit 15.10.2009 02:26:
>>> On 10/14/2009 6:22 AM, Michael J Gruber wrote:
>>>> c = canvas.canvas([style.linewidth(1)])
>>>
>>> So I had wondered about this and did
>>> not understand the documentation.
>>>
>>> If one applies a line style to a canvas, I take
>>> it that it becomes the default for all stroke operations
>>> (by that canvas), including draw operations?
>>
>> It seems so ;)
>> It's not documented (online draw style is), but it works that way.
>
> See canvas constructor at http://pyx.sourceforge.net/manual/node17.html
>
> There also is (or was) a canvas set method. However, I consider this a
> bad design and we are about to remove that (am I right, Jörg?).
Yes, we wanted to get rid of this. AFAIR we mostly kept it for technical
reasons.
> Its also questionable, whether the canvas constructor attrs-field is a
> good design decision. I remember having argued against it. Anyway, it is
> likely to stay(?). To my mind, the cleanest way of setting attributes is
> while inserting a canvas in another canvas.
>
> c = canvas()
> c2 = canvas()
> c.insert(c2, [style.linewidth(1)])
I also don't like the attrs argument of the canvas class too much, but
the solution with two canvases is too complicated.
Anyway, I have to say that in general you should use
unit.set(wscale=...) instead of setting a default linewidth, since then
also linewidth.thick, etc., work as wanted. As André has pointed out,
though, finding the right scaling factor for a given line-width is
non-trivial, although possible. Btw, that would be an argument for a
more natural base for the linewidth.
> However, I don't consider this to be that important. Other things
> clearly are, like doing a new release this year (which is a new year's
> pledge of mine, and I still hope to get it done).
Yes :-)
>>> PS Btw, it is great to be able to sum(mypaths,path()),
>>> but might it be worth defining mypath+0 to be mypath
>>> so we can just sum(mypaths)? Not sure this is a good
>>> idea but thought I'd throw it out there.
>
>
> hmmm ... -0 ... I don't like it.
Same for me.
Cheers,
Jörg
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