[NTG-context] Full page image and caption in another page?

[Taco Hoekwater]

Hi,

This sounds quite complicated, really. 

I am not at all sure how this page rotation should work but I assume you plan a pdf-only document then?  Otherwise, I would expect rotating the figure instead of the whole page. Also, rotating the paper does not rotate the layout, at least not if you use a fixed height and width. You would need something like this for auto-resizing \textheight and \textwidth:

\definelayout[default][topspace=0.6cm, topdistance=0cm, header=1cm, headerdistance=0cm,
                       height=fit, footer=0cm,
                       backspace=4.2cm, width=fit]

Another problem is that setting the width and height of a float does not affect any externafigure side. You need to do a \setupexternalfigure for that.

And there is (afaik) no support for having a “two-page” float. The “opposite” key is used to put the float (including caption) on the opposite side of the current page.

But at least there is a command to typeset a caption standalone, so perhaps that will help? You would then *not* use the \startplacebigfigure, but place the caption and the image manually:

\page
\placefloatcaption[bigfigure][title={A cow}]
\page
\externalfigure[cow]
\page

Best wishes,
Taco


> On 22 Sep 2020, at 19:42, José de Mattos Neto <josepmneto at gmail.com> wrote:
> 
> Hi, it's my first message on this list.
> I've searched in ConTeXt manuals, TeX.SX and here, but couldn't find a way to achieve these 4 requirements altogether:
> 
> 	• Place a figure as full-page figure
> 	• Change orientation accordingly (if it's a landscape PDF, for instance)
> 	• Make that using \setupfloat (or other setup), not directly in \placefloat
> 	• Place captions in another page (ideally on opposite page)
> Problems:
> 	• I can't get # 1 and # 3 at same time
> 	• \setupfloat doesn't have before option, which I could use to change orientation
> 	• I have no idea how to accomplish # 4
> A minimal working example (PDF in attachment):
> 
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> \definepapersize[default][A4, portrait]
> \definelayout[default][topspace=0.6cm, topdistance=0cm, header=1cm, headerdistance=0cm,
>                        height=27.3cm, footer=0cm,
>                        backspace=4.2cm, width=13.6cm]
> \setuppapersize[default]
> \setuplayout[default]
> \setuppagenumbering[alternative=doublesided, location={header}]
> \setupexternalfigures[location={default}]
> 
> \definepapersize[rotate][A4, landscape]
> \definefloat[bigfigure][bigfigures][figure]
> \setupfloat[bigfigure][default={page},
>                        width=1\textwidth, height=1\textheight,
>                        before={\setuppapersize[rotate]}] % there's no before in setupfloat
> \setupcaption[bigfigure][location={opposite}] % there's no opposite location in setupcaption
> 
> \starttext
> \showframe
> \dorecurse{2}{\input{knuth}}
> 
> \setuppapersize[rotate] % this doesn't work because is in same page
> \startplacebigfigure[title={A cow}]{\externalfigure[cow]}\stopplacebigfigure
> \setuppapersize[default]
> 
> \dorecurse{2}{\input{knuth}}
> \stoptext
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> 
> Thanks in advance!
> José Neto
> <mwe.pdf>___________________________________________________________________________________
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Taco Hoekwater
Elvenkind BV