Gschem is an open-source tool for drawing circuit diagrams. (And then go
on to simulate the circuits or lay out a circuit board.) LyX can be used
for documentation.
Gschem comes with a converter (gaf) for eps and pdf, so it was easy to
add support through the external vector graphics inset. No changes to
LyX source, only "preferences" and "external_templates"
"preferences" needs these file formats and converters:
\format "gschem" "sch" "Gschem schematic" "" "" "gschem" "vector"
"application/x-geda-schematic"
\format "gschem-sym" "sym" "Gschem symbol" "" "" "gschem" "vector"
"application/x-geda-symbol"
\converter "gschem" "pdf6" "gaf export -o $$o -k 10 -m 1mm $$i" ""
\converter "gschem" "eps" "gaf export -o $$o -k 10 -m 1mm $$i" ""
\converter "gschem-sym" "eps" "gaf export -o $$o -k 10 -m 1mm $$i" ""
\converter "gschem-sym" "pdf6" "gaf export -o $$o -k 10 -m 1mm $$i" ""
The two formats are the same, but have a different filename ending. So
it seems two formats are needed.
The converter can make eps and pdf for both formats, hence 4 converters.
Conversions to svg, png jpg and ps is also possible, but I am not sure
any of those are needed for LyX?
Updating "preferences" allows conversion of such files when entered into
the external inset. The files are then previewed in LyX, they appear in
output, and LyX can start gschem for external editing.
"external_templates" also need a patch to recognize .sym and .sch files:
--- /usr/share/lyx/external_templates 2017-05-17 17:31:22.000000000 +0200
+++ external_templates 2017-06-14 15:13:29.062668373 +0200
@@ -183,7 +183,7 @@
InputFormat "*"
# Globbing pattern used when browsing for a vector graphics file.
# xfig, dia, fen and ly are exlcuded, since we have specialized
templates
- FileFilter "*.{agr,dot,emf,eps,odg,obj,sxd,svg,svgz,tgo,pdf,wmf}"
+ FileFilter
"*.{agr,dot,emf,eps,odg,obj,sxd,svg,svgz,tgo,pdf,wmf,sch,sym}"
AutomaticProduction true
# LyX has hard-coded support for these transformations
Transform Rotate
I have tested these exports: postscript, dvi, PDF(dvipdfm), PDF(XeTeX),
PDF(LuaTeX), PDF(pdflatex), and PDF(ps2pdf). All produced files with
embedded circuit diagrams. Please tell if more work is needed before it
may be included into LyX.
Helge Hafting
