* Bounding box of picture returned by textext() in METAPOST
@ 2020-04-04 20:58 Gerben Wierda
2020-04-05 16:04 ` Gerben Wierda
0 siblings, 1 reply; 2+ messages in thread
From: Gerben Wierda @ 2020-04-04 20:58 UTC (permalink / raw)
To: mailing list for ConTeXt users
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I have this METAPOST macro:
vardef makeTeXLabel( expr w, h, name) =
if debugProgram or debugLabels: show "NAME makeTeXLabel:", name, tostring 0.8w, tostring 0.8h; fi
save p; picture p;
p := textext( "\startframedtext[middle]" &
"[align=middle,frame=on" &
",width=" & tostring 0.8w & "bp" &
",height=" & tostring 0.8h & "bp]" &
name & "\stopframedtext");
save b; path b; b := boundingbox p;
save dim; pair dim;
dim := (urcorner b) - (llcorner b);
save width, height; numeric width, height;
width := xpart dim;
height = ypart dim;
if debugLabels: show "PLACE:", w, h, width, height; fi
if (width > 0.8w) or (height > 0.8h):
if (width > height):
if debugLabels: show "XSCALING:", (0.8w/width,0.8w/width); fi
p:= p xyscaled (0.8w/width,0.8w/width);
else:
if debugLabels: show "YSCALING:", (0.8h/height,0.8h/height); fi
p:= p xyscaled (0.8h/height,0.8h/height);
fi
fi
p
enddef;
It gets called with w=133 and h=53 (I am working in METAPOST native units, so bp)
So, the textext() command gets something like 106bp x 42bp, which seems to be the case:
metapost log > >> "NAME makeTeXLabel:"
metapost log > >> "My 'Application' Function"
metapost log > >> "106.40000000000001"
cld > tex > w : - : \MPLIBsetNtextX{1}{\startframedtext [middle][align=middle,frame=on,width=106.40000000000001bp,height=42.400000000000006bp]My 'Application' Function\stopframedtext }
cld > tex > F : - : \startblankhandling
cld > tex > w : - : \setblankcategory{6}
cld > tex > F : - : \flushblankhandling
cld > tex > F : - : \stopblankhandling
metapost log > >> "42.400000000000006"
metapost log > >> "PLACE:"
metapost log > >> 133
metapost log > >> 53
metapost log > >> 511.08659908200002
metapost log > >> 42.399990514000002
But the bounding box is 511bp wide (something like 7in or 18cm, probably textwidth) but I’m asking for a box that is 106bp wide.
What happens here? And how do I get it right?
G
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Bounding box of picture returned by textext() in METAPOST
2020-04-04 20:58 Bounding box of picture returned by textext() in METAPOST Gerben Wierda
@ 2020-04-05 16:04 ` Gerben Wierda
0 siblings, 0 replies; 2+ messages in thread
From: Gerben Wierda @ 2020-04-05 16:04 UTC (permalink / raw)
To: mailing list for ConTeXt users
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Nobody?
> On 4 Apr 2020, at 22:58, Gerben Wierda <gerben.wierda@rna.nl> wrote:
>
> I have this METAPOST macro:
>
> vardef makeTeXLabel( expr w, h, name) =
> if debugProgram or debugLabels: show "NAME makeTeXLabel:", name, tostring 0.8w, tostring 0.8h; fi
> save p; picture p;
> p := textext( "\startframedtext[middle]" &
> "[align=middle,frame=on" &
> ",width=" & tostring 0.8w & "bp" &
> ",height=" & tostring 0.8h & "bp]" &
> name & "\stopframedtext");
> save b; path b; b := boundingbox p;
> save dim; pair dim;
> dim := (urcorner b) - (llcorner b);
> save width, height; numeric width, height;
> width := xpart dim;
> height = ypart dim;
> if debugLabels: show "PLACE:", w, h, width, height; fi
> if (width > 0.8w) or (height > 0.8h):
> if (width > height):
> if debugLabels: show "XSCALING:", (0.8w/width,0.8w/width); fi
> p:= p xyscaled (0.8w/width,0.8w/width);
> else:
> if debugLabels: show "YSCALING:", (0.8h/height,0.8h/height); fi
> p:= p xyscaled (0.8h/height,0.8h/height);
> fi
> fi
> p
> enddef;
>
> It gets called with w=133 and h=53 (I am working in METAPOST native units, so bp)
>
> So, the textext() command gets something like 106bp x 42bp, which seems to be the case:
>
> metapost log > >> "NAME makeTeXLabel:"
> metapost log > >> "My 'Application' Function"
> metapost log > >> "106.40000000000001"
> cld > tex > w : - : \MPLIBsetNtextX{1}{\startframedtext [middle][align=middle,frame=on,width=106.40000000000001bp,height=42.400000000000006bp]My 'Application' Function\stopframedtext }
> cld > tex > F : - : \startblankhandling
> cld > tex > w : - : \setblankcategory{6}
> cld > tex > F : - : \flushblankhandling
> cld > tex > F : - : \stopblankhandling
> metapost log > >> "42.400000000000006"
> metapost log > >> "PLACE:"
> metapost log > >> 133
> metapost log > >> 53
> metapost log > >> 511.08659908200002
> metapost log > >> 42.399990514000002
>
> But the bounding box is 511bp wide (something like 7in or 18cm, probably textwidth) but I’m asking for a box that is 106bp wide.
>
> What happens here? And how do I get it right?
>
> G
>
>
> ___________________________________________________________________________________
> 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
> ___________________________________________________________________________________
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___________________________________________________________________________________
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
___________________________________________________________________________________
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