kicad-developers team mailing list archive

[Dick Hollenbeck <dick@xxxxxxxxxxx>]

On Jun 23, 2013 4:45 AM, "Thiadmer Riemersma" <thiadmer.riemersma@xxxxxxxxx>
wrote:
>
> Hello everyone,
>
> I have a request for the s-expression format for footprints: a field for
data that is not used by pcbnew or the module editor, but that is preserved
(by the module editor). Something like (fp_userdata "general text string").
>
> In the alternative, I would like to request to be able to put comments in
an s-expression. Those comments need not be preserved (by the module
editor).

Any line whose first character is a # is a comment now.  Should be no limit
to th numbrr of such lines.  So your alternative is being fulfilled
already, courtesy of yours truly.

>
> Rationale:
>
> I am developing a "footprint wizard", based on templates. But a wizard
won't be of much use if you cannot modify the footprints later. So, this
wizard reads back footprints and allows you to adjust them. However,
detecting which template was used (and with what settings) may not be
deterministically feasible, given the number of options.
>
> So, the best option is to store that information in the generated
footprint. Even if the user changes the footprint in the module editor, the
wizard would still be able to get the correct template.
>
> In the alternative (store the information in a comment), the user would
be able to adjust the footprint with the wizard, as long as no changes have
been made to it in the module editor. This is good enough for me.
>
> Question:
>
> I do not appear to be able to select an s-expression library in pcbnew.
Is this correct? Or do I need to build KiCad with a special option?

Look at how the test program is built down in /tools.  I wrote a document
model parsing function that gives you a boost propert tree as a document.

A second path is to try and lind to libcommon, but this will flop due to
unredolved ecternals if you stray too far from richio and dsnlexer.

A final and third option is to link with _pcbnew.so which basically all of
pcbnew in DSO form.  Currently this is only built is SCRIPTING is bulit,
but I will be changing this in the next handful of weeks so it always gets
built.

Are you using wx as your ui?

Dick

>
> Regards,
> Thiadmer Riemersma
>
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