Re: [wxhaskell-users] Multiple GL Canvases

[Georg M. <mai...@st...>]

On Tue, 08 Feb 2005 20:10:08 +0100, Daan Leijen <da...@cs...> wrote:

>>> However, the printing support refers only at the moment to just norma=
l
>>> printing. I have not studied Postscript devices yet... Isn't it
>>> always possible to just select a postscript printer and print to file=
?
>>> Or do you have something special in mind?
>>
>>
>> perhaps I'm misunderstanding something here. It's been a while since
>> I looked into this, but when I wanted a way to convert the graphs I
>> draw on wxWidgets to print in scalable form, the way to go seemed to
>> be to create a Postscript context and pass that to the normal repaint
>> function, so that it would draw in Postscript commands instead of on
>> the screen. Seemed almost too easy, only that I couldn't find a way to
>> create such things in wxHaskell.
>
> I added support for drawing onto printer device contexts. This means
> that you have printer support -- a user gets a printer dialog etc. and
> can print, while the haskell code just draws to a DC -- either the
> screen or a printer. On windows, I can simply select a postscript
> printer and print to a file to get postscript output.
>
> However, I have not added specific support for getting postscript
> output directly, even though I can vagelue remember that wxWidgets
> has such support -- if I find time, I'll look into it, but I am
> hoping that also on unix, one can emulate this behaviour by selecting
> a postscript printer and printing to file.

On unix it is even more natural to print to a file in postscript format. =
However, the question is how the content is represented for printing. I'a=
m not sure whether the content of the DC in wx is sent to the printer as =
a bitmap or as vector graphics. The latter would be certainly prefered fo=
r ps-files.

  Georg