Re: Float positioning

[Tomas Hala <tomas.hala@mendelu.cz>]

Hi Alexey,

# Yes, I tried leftpage/rightpage: this removes the blank page, but may
# cause images to be reordered (so that e. g. 3 goes before 2), which is
# completely unacceptable IMO.

Yes, you are right. 
But -- I do not know why -- your code you attached gives on my computer (TL2019)
the 1-3-2 order, too.
 
# Also, this doesn't help with the text flow at the page where the first
# image is positioned (still no text below the image).

Is it one or two problems? I do know how to solve by some system way...

You can try the work around below, it is based on computation of additional measures for special instance of figure.

Best wishes,

Tomáš 

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\showframe
\setupexternalfigures[location={local,default}]

\definefloat[figpage][figure]

\newdimen\myxx
\newdimen\myht 
\newcount\mysp

\def\myfig#1#2#3{%
  \myht=\makeupheight
  \setbox0=\hbox{{\externalfigure[#2][#3]}}
  \advance\myht by -\wd0 
  \myht=.5\myht
  \myxx=\myht
  \divide\myxx by \lineheight
  \mysp=\myxx 
  \advance\mysp by 1

  \setupfloat[figpage][toffset=\myht]
  \setupcaption[figpage][spaceafter=\the\mysp*big]
  \startplacefigpage[location={here},title=#1]
    {\externalfigure[#2][#3]}
  \stopplacefigpage
}

\starttext

\dorecurse{3}{\input{knuth}}
  \startplacefigure[location={here},title=cow]
    {\externalfigure[cow][width=150mm]}
  \stopplacefigure
\dorecurse{1}{{\blue\input{knuth}}}
\myfig{cow again}{cow}{width=150mm}
\myfig{one more cow}{cow}{width=100mm}
\myfig{one more cow}{cow}{width=50mm}
\myfig{one more cow}{cow}{width=150mm}

\dorecurse{10}{{\green\input{knuth}}}

\stoptext
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%



# 
# -- 
# Regards,
# Alexey Kryukov <anagnost at yandex dot ru>
# 
# Moscow State University
# Faculty of History
# 
# On Mon, 6 Apr 2020 13:58:57 +0200
# Tomas Hala wrote:
# 
# > Hi Alexey,
# > 
# > I do not how free are you in decision where figures should be located
# > but I tried with "leftpage" and "rightpage" instead of "page" and
# > it seems to be ok.
# > 
# > \placefigure[rightpage]{one more cow}{\externalfigure[cow]
# > [width=150mm]} \placefigure[leftpage]{cow again}{\externalfigure[cow]
# > [width=150mm]}
# > 
# > Best wishes,
# > 
# > Tomáš
# > 
# > 
# > Mon, Apr 06, 2020 ve 02:15:50PM +0300 Alexey Kryukov napsal(a):
# > # Hi all,
# > # 
# > # Suppose I have the following document:
# > # 
# > # \setupexternalfigures[location={local,default}]
# > # \starttext
# > # 
# > # \dorecurse{3}{\input{knuth}}
# > # \placefigure[top]{cow}{\externalfigure[cow][width=150mm]}
# > # \input{knuth}
# > # \placefigure[page]{one more cow}{\externalfigure[cow][width=150mm]}
# > # \placefigure[page]{cow again}{\externalfigure[cow][width=150mm]}
# > # \dorecurse{10}{\input{knuth}}
# > # \stoptext
# > # 
# > # Here I would expect the text flow to continue below the first image,
# > # and then two more images to be positioned on separate pages.
# > # Instead I get no text at all at the page with the Figure 1 and one
# > # more blank page after it. Only after the last image the text flow
# > # continues.
# > # 
# > # Since similar situations are very common for documents which contain
# > # several large illustrations, I would like to know if there are any
# > # workarounds for the problem.
# > # 
# > # -- 
# > # Regards,
# > # Alexey Kryukov <anagnost at yandex dot ru>
# > # 
# > # Moscow State University
# > # Faculty of History
# > # ___________________________________________________________________________________
# > # If your question is of interest to others as well, please add an
# > # entry to the Wiki!
# > # 
# > # maillist : ntg-context@ntg.nl /
# > # http://www.ntg.nl/mailman/listinfo/ntg-context webpage  :
# > # http://www.pragma-ade.nl / http://context.aanhet.net archive  :
# > # https://bitbucket.org/phg/context-mirror/commits/ wiki     :
# > # http://contextgarden.net
# > # ___________________________________________________________________________________
# > 
# >                                          Tomáš Hála
# > --------------------------------------------------------------------
# > Mendelova univerzita, Provozně ekonomická fakulta, ústav informatiky
# > Zemědělská 1, CZ-613 00 Brno,  tel. +420 545 13 22 28
# > --------------------------------------------------------------------
# > http://akela.mendelu.cz/~thala
# > ___________________________________________________________________________________
# > If your question is of interest to others as well, please add an
# > entry to the Wiki!
# > 
# > maillist : ntg-context@ntg.nl /
# > http://www.ntg.nl/mailman/listinfo/ntg-context webpage  :
# > http://www.pragma-ade.nl / http://context.aanhet.net archive  :
# > https://bitbucket.org/phg/context-mirror/commits/ wiki     :
# > http://contextgarden.net
# > ___________________________________________________________________________________
# 
# 
# ___________________________________________________________________________________
# If your question is of interest to others as well, please add an entry to the Wiki!
# 
# maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
# webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
# archive  : https://bitbucket.org/phg/context-mirror/commits/
# wiki     : http://contextgarden.net
# ___________________________________________________________________________________

                                         Tomáš Hála
--------------------------------------------------------------------
Mendelova univerzita, Provozně ekonomická fakulta, ústav informatiky
Zemědělská 1, CZ-613 00 Brno,  tel. +420 545 13 22 28
--------------------------------------------------------------------
http://akela.mendelu.cz/~thala
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : http://contextgarden.net
___________________________________________________________________________________