Hi Robert,
Debugged and all, here you go.
Cheers,
Sietse
\useexternalfigure[img:fig:cow][cow.pdf]
\useexternalfigure[img:fig:mill][mill.png]
\starttext
\section{Pictures}
% The externalfigure names HAVE TO take the form 'img:FIGURELABEL',
% or the automatic image list at the end on won't be able to
% guess the image names from the figure labels.
\placefigure[here][fig:cow]
{cap-cow}
{\externalfigure[img:fig:cow]}
\section{More pictures}
\placefigure[here][fig:mill]
{cap-mill}
{\externalfigure[img:fig:mill]}
%%%% Lists start here %%%%%%%
\enablemode[draft]
\startmode[draft]
% Better list heading --- the captions are what matters
\setupheadtext[figures=List of Captions]
\completelistoffigures
% Now for printing all the images
\section{List of Pictures}
\startluacode
-- we won't need the keys k, but still.
for k,v in pairs(structures.lists.ordered.float.figure) do
label_string = v.references.reference
-- `..` is Lua for string concatenation
image_string = "img:" .. label_string
-- TeX <--> Lua, passing arguments to commands
-- [stuff] <--> { 'stuff' }
-- [stuff=bother] <--> { stuff = 'bother' }
-- {stuff} <--> 'stuff'
-- context.in() seems to have some Lua meaning
-- so we print the command string directly, instead
context("\\in{Figure}[" .. label_string .. "]")
context.page( { 'no' } )
context.externalfigure( { image_string }, { 'here' } )
context.hairline()
context.par() -- end paragraph
end
\stopluacode
\stopmode
\stoptext
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