[Fwd: [wxpython-users] Re: Trying to understand GraphicsPath]

[Christopher Barker]

Nitro wrote:
> Yes, I have seen this earlier. Cairo seems to require GTK

no it is the other way around -- GTK requires Cairo. Cairo is the 
rendering library for GTK, but it can be used quite independently. IN 
fact, I'm pretty sure it is used for the SVG rendering in the Mozilla 
project, on all supported platforms.

> doesn't come with wxPython on msw. I'm not sure if floatcanvas has much 
> in common with wxPython anymore once we don't use wxGraphicsContext :-)

well, that's true -- and I really don't want to get into the "multiple 
back-ends" mess that Matplotlib is in...

> Anyway, it should not be too hard to add direct cairo support, since the 
> rendering backends were designed to be switchable.

Maybe someday. Though if Cairo can handle floating point line widths and 
font sizes, it could be a solution. However, I know it had some related 
issues a couple years back when I messed with it. One example:

To make an ellipse, you had to make a circle, then apply a transform to 
it to stretch it -- which is fine, except that the line width got 
stretched too, which isn't what one would usually want.

Also, I recall that there was talk of building a wxGraphicsContext on 
Cairo -- I don't know what became of that.

Something to look at with all our copious spare time.

-Chris





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