Btukfyl

I'm attempting (with huge help from Hafid Boukhoulda who helped here) to utilise chronosys to construct a number of timelines, mostly on BC date ranges. Most data has been fixed-points, so not a problem, but some are events dated only to date ranges. I come across a problem when date ranges are close together:

documentclass{article}

usepackage{chronosys}



newcommand{mychronodatestyle}[1]{



pgfmathparse{equal(sign(#1),-1)? int(abs(#1)):#1 }

pgfmathresult

pgfmathparse{equal(sign(#1),-1)? "BC":}

 ~pgfmathresult

 }





 catcode`!=11

 defeventyear{!chreventyear}

 catcode`!=12



 newcommand{myeventdatestyle}[1]{

 pgfmathparse{equal(sign(eventyear),-1)? int(abs(eventyear)):"#1"}

pgfmathresult

 pgfmathparse{equal(sign(eventyear),-1)? "BC":}

 ~pgfmathresult

 }







begin{document}





startchronology

[startyear=-800,stopyear=-14, arrow=false, height=0.2em, dateselevation=10pt,

datesstyle=mychronodatestyle

]

chronoevent[datestyle=myeventdatestyle ]

{12/-753}{Rome's foundation}



chronoperiode[datesstyle=mychronodatestyle,dateselevation=2pt]{-350}{-320}{important event}

stopchronology



end{document}

Your datestyle was inadequate for the narrow date band provided. So I created an alternate (vertical) date style (named mychronovdatestyle, note the v) for such narrowly spaced events.

I also added a number of % chars at line end, to suppress stray spaces from getting introduced into the labels.

documentclass{article}

usepackage{chronosys}



newcommand{mychronodatestyle}[1]{%

pgfmathparse{equal(sign(#1),-1)? int(abs(#1)):#1 }%

pgfmathresult%

pgfmathparse{equal(sign(#1),-1)? "BC":}%

 ~pgfmathresult%

 }



newcommand{mychronovdatestyle}[1]{%

pgfmathparse{equal(sign(#1),-1)? int(abs(#1)):#1 }%

edeftmp{pgfmathresult}%

pgfmathparse{equal(sign(#1),-1)? "BC":}%

 kern-1.5ptrotatebox[origin=left]{90}{--- tmp~pgfmathresult}%

 }



 catcode`!=11

 defeventyear{!chreventyear}

 catcode`!=12



 newcommand{myeventdatestyle}[1]{%

 pgfmathparse{equal(sign(eventyear),-1)? int(abs(eventyear)):"#1"}%

pgfmathresult%

 pgfmathparse{equal(sign(eventyear),-1)? "BC":}%

 ~pgfmathresult%

 }

begin{document}

startchronology

[startyear=-800,stopyear=-14, arrow=false, height=0.2em, dateselevation=10pt,

datesstyle=mychronodatestyle

]

chronoevent[datestyle=myeventdatestyle ]

{12/-753}{Rome's foundation}



chronoperiode[color=red,datesstyle=mychronovdatestyle,dateselevation=-7pt]

  {-350}{-320}{important event}

stopchronology



end{document}