Chronosys printing measurement units
\documentclass{article}
\usepackage{chronosys}
\usepackage{ragged2e}
\begin{document}
\begin{chronology}[startyear=1995, stopyear=2008]
\chronograduation[periode]{1}
\chronoevent[markdepth=20pt, year=false, textwidth=1cm]{1995}{Debate on CEPA Begins}
\chronoevent[markdepth=50pt, year=false]{1999}{\parbox{2.5cm}{\RaggedRight{CEPA Amendments Passed this is a long label}}}
\chronoevent[markdepth=50pt, year=false]{2007}{BPA Risk Assessment Begins}
\chronoevent[markdepth=20pt, year=false]{2006}{Categorization of DSL}
\end{chronology}
\end{document}
In terms of your "gap" I would move the scale to the top like this (choice of colors is yours -- you could make all black)
\documentclass{article}
\usepackage{chronosys}
\usepackage{ragged2e}
\begin{document}
\begin{chronology}[startyear=1995, stopyear=2008]
\chronoperiodecoloralternation{black,green,black,green}
\chronograduation[periode][dateselevation=0pt]{1}
\chronoevent[markdepth=20pt, year=false, textwidth=1cm]{1995}{Debate on CEPA Begins}
\chronoevent[markdepth=50pt, year=false]{1999}{\parbox{2.5cm}{\RaggedRight{CEPA Amendments Passed this is a long label}}}
\chronoevent[markdepth=50pt, year=false]{2007}{BPA Risk Assessment Begins}
\chronoevent[markdepth=20pt, year=false]{2006}{Categorization of DSL}
\end{chronology}
\end{document}
A new version (slightly amended) of chronos. The code is only as long as it is because it is attempting to become a more flexible substitute for chronosys, which is extremely problematic in many ways. (If it does exactly what you want, great. If you want to tweak it a little, good luck.)
\documentclass[border=10pt,multi,tikz]{standalone}
\usepackage{pgfcalendar}
\usepackage{datenumber,xparse,fp}
\usetikzlibrary{arrows.meta,backgrounds,fixedpointarithmetic}
\makeatletter
\ExplSyntaxOn
\tl_new:N \l_chronos_date_tl
\tl_new:N \l_chronos_dateformat_tl
\tl_new:N \l_chronos_year_tl
\tl_new:N \l_chronos_yearformat_tl
\tl_set:Nn \l_chronos_dateformat_tl { !d/!m/!Y }
\tl_set:Nn \l_chronos_yearformat_tl { !Y }
% YY yn lle YYYY
\cs_new_protected_nopar:Npn \chronos_year_shorten:n #1
{
\chronos_year_shorten_aux:w #1 \q_stop % expl3 manuaal, 46
}
\cs_new_protected_nopar:Npn \chronos_year_shorten_aux:w #1 #2 #3 #4 \q_stop
{
#3 #4
}
\cs_generate_variant:Nn \chronos_year_shorten:n { V , c }
\cs_generate_variant:Nn \int_abs:n { c }
\cs_generate_variant:Nn \tl_replace_all:Nnn { Nnx }
% dangos dyddiadau
\cs_new_protected_nopar:Npn \chronos_show_date:n #1
{% ateb Joseph Wright: http://tex.stackexchange.com/a/327642/
\tl_set_eq:NN \l_chronos_date_tl \l_chronos_dateformat_tl
\tl_replace_all:Nnx \l_chronos_date_tl { !a } { \pgfcalendarweekdayshortname{\thechronos@weekday} }
\tl_replace_all:Nnx \l_chronos_date_tl { !A } { \pgfcalendarweekdayname{\thechronos@weekday} }
\tl_replace_all:Nnx \l_chronos_date_tl { !b } { \pgfcalendarmonthshortname{\csname chronos@#1month\endcsname} }
\tl_replace_all:Nnx \l_chronos_date_tl { !B } { \pgfcalendarmonthname{\csname chronos@#1month\endcsname} }
\tl_replace_all:Nnx \l_chronos_date_tl { !d } { \csname chronos@#1day\endcsname }
\tl_replace_all:Nnx \l_chronos_date_tl { !E } { \chronos_dateformat_era:c { chronos@#1year } }
\tl_replace_all:Nnx \l_chronos_date_tl { !m } { \csname chronos@#1month\endcsname }
\tl_replace_all:Nnx \l_chronos_date_tl { !q } { \chronos_dateformat_sign:c { chronos@#1year } }
\tl_replace_all:Nnx \l_chronos_date_tl { !Q } { \chronos_dateformat_signs:c { chronos@#1year } }
\tl_replace_all:Nnx \l_chronos_date_tl { !y } { \chronos_year_shorten:c { chronos@#1year } }
\tl_replace_all:Nnx \l_chronos_date_tl { !Y } { \int_abs:c { chronos@#1year } }
\l_chronos_date_tl
}
\cs_new_protected_nopar:Npn \chronos_show_year:n #1
{% ateb Joseph Wright: http://tex.stackexchange.com/a/327642/
\tl_set_eq:NN \l_chronos_year_tl \l_chronos_yearformat_tl
\tl_replace_all:Nnx \l_chronos_year_tl { !E } { \chronos_dateformat_era:n { #1 } }
\tl_replace_all:Nnx \l_chronos_year_tl { !q } { \chronos_dateformat_sign:n { #1 } }
\tl_replace_all:Nnx \l_chronos_year_tl { !Q } { \chronos_dateformat_signs:n { #1 } }
\tl_replace_all:Nnx \l_chronos_year_tl { !y } { \chronos_year_shorten:n { #1 } }
\tl_replace_all:Nnx \l_chronos_year_tl { !Y } { \int_abs:n { #1 } }
\l_chronos_year_tl
}
\cs_new_protected_nopar:Npn \chronos_dateformat_sign:n #1
{
\int_compare:nT { #1 < 0 } { - }
}
\cs_generate_variant:Nn \chronos_dateformat_sign:n { c }
\cs_new_protected_nopar:Npn \chronos_dateformat_signs:n #1
{
\int_compare:nTF
{ #1 < 0 } { - }
{
\int_compare:nT { #1 > 0 }
{
\ifchronos@yearzero\relax
\else
\int_compare:nT { #1 > 1} { + }
\fi
}
}
}
\cs_generate_variant:Nn \chronos_dateformat_signs:n { c }
\cs_new_protected_nopar:Npn \chronos_dateformat_era:n #1
{
\int_compare:nTF
{ #1 < 0 } { \chronos@yearbce }
{
\int_compare:nT { #1 > 0 }
{
\ifchronos@yearzero\relax
\else
\int_compare:nT { #1 > 1} { \chronos@yearce }
\fi
}
}
}
\cs_generate_variant:Nn \chronos_dateformat_era:n { c }
\cs_new_protected_nopar:Npn \chronos_set_dateformat:n #1
{
\tl_set:Nn \l_chronos_dateformat_tl { #1 }
\tl_replace_all:Nnn \l_chronos_dateformat_tl { ~ } { \c_space_token }
}
\cs_new_protected_nopar:Npn \chronos_set_yearformat:n #1
{
\tl_set:Nn \l_chronos_yearformat_tl { #1 }
\tl_replace_all:Nnn \l_chronos_yearformat_tl { ~ } { \c_space_token }
}
% user interface
\NewDocumentCommand \chronos@setdateformat { m }
{
\chronos_set_dateformat:n { #1 }
}
\NewDocumentCommand \chronos@setyearformat { m }
{
\chronos_set_yearformat:n { #1 }
}
% for pgf/tikz convenience
\NewDocumentCommand \chronos@showdate { o m }
{
\group_begin:
\IfValueT { #1 }
{
\chronos_set_dateformat:n { #1 }
}
\pgfcalendarjuliantoweekday{\csname thechronos@#2date\endcsname}{\c@chronos@weekday}%
\chronos_show_date:n { #2 }
\group_end:
}
\NewDocumentCommand \chronos@showyear { o m }
{
\group_begin:
\IfValueT { #1 }
{
\chronos_set_yearformat:n { #1 }
}
\chronos_show_year:n { #2 }
\group_end:
}
\ExplSyntaxOff
\newlength\chronos@tempdima
\newcounter{chronos@date}
\newcounter{chronos@startdate}
\newcounter{chronos@enddate}
\newcounter{chronos@startyear}
\newcounter{chronos@endyear}
\newcounter{chronos@yeardate}
\newcounter{chronos@thingdate}
\newcounter{chronos@otherthingdate}
\newcounter{chronos@weekday}
\newcounter{chronos@tempcnta}
\newif\ifchronos@marks
\chronos@marksfalse
\newif\ifchronos@timeline@showyears
\chronos@timeline@showyearstrue
\newif\ifchronos@eventyearsonline
\chronos@eventyearsonlinefalse
\newif\ifchronos@yearzero
\chronos@yearzerofalse
\newif\ifchronos@onlytext
\chronos@onlytextfalse
\newif\ifchronos@markeras
\chronos@markerasfalse
\newif\ifchronos@yearsonline
\chronos@yearsonlinefalse
\newif\ifchronos@eventdatessplit
\chronos@eventdatessplitfalse
\pgfkeys{/pgf/number format,
int detect,
set thousands separator={},
}
\tikzset{%
/handlers/.chronos too/.code={%
\edef\chronos@tempc{\pgfkeyscurrentpath}%
\edef\chronos@tempd{#1}%
\tikzset{%
\pgfkeyscurrentpath @too/.code={%
\tikzset{%
/chronos/\chronos@tempd/.append style={##1},
}%
},
\chronos@tempc/.forward to=\chronos@tempc @too,
}%
},
chronos/.code={% http://tex.stackexchange.com/a/159856/ - Claudio Fiandrino
\tikzset{%
align=center,
anchor=mid,
fixed point arithmetic,
/chronos/.cd,
#1,
timeline config,
timeline config/.code={},
}%
\ifnum\chronos@startyear=\chronos@endyear
\tikzset{%
/chronos/timeline no years,
}%
\fi
\setlength\chronos@tempdima{\chronos@timelinemargin}%
\ifchronos@markeras
{%
\chronos@timelinefont
\pgfmathsetmacro\chronos@tempe{((width("\chronos@bce"))>(width("\chronos@ce"))) ? (width("\chronos@bce")) : (width("\chronos@ce"))}%
\xdef\chronos@tempf{\chronos@tempe}%
}%
\addtolength\chronos@tempdima{\chronos@tempf pt}%
\fi
\pgfmathsetmacro\chronos@unit{(\chronos@width-2*\chronos@tempdima)/(\thechronos@enddate-\thechronos@startdate)}%
\draw [/chronos/timeline@line, line width=\chronos@height] (-\chronos@tempdima,0) coordinate (chronos pre) -- +(\chronos@width,0) coordinate (chronos post);
\coordinate (chronos base) at (0,-.5*\chronos@height);
\coordinate (chronos top) at (0,.5*\chronos@height);
\coordinate (chronos foot) at (0,{-.5*\chronos@height-\chronos@borderheight});
\coordinate (chronos head) at (0,{.5*\chronos@height+\chronos@borderheight});
\coordinate (chronos start) at (0,0);
\coordinate (chronos end) at ([xshift=-\chronos@tempdima]chronos post);
\ifdim\chronos@borderheight>0pt
\fill [bottom color=chronos@borderinner, top color=chronos@borderouter] (chronos pre |- chronos head) rectangle (chronos post |- chronos top);
\fill [top color=chronos@borderinner, bottom color=chronos@borderouter] (chronos pre |- chronos base) rectangle (chronos post |- chronos foot);
\fi
\ifchronos@timeline@showyears
\pgfmathsetcounter{chronos@startyear}{\chronos@startyear}%
\pgfmathsetcounter{chronos@endyear}{\chronos@endyear}%
\def\tempa{none}%
\ifx\chronos@stepfrom\tempa
\def\tempa{01}%
\ifx\chronos@startmonth\tempa
\ifx\chronos@startday\tempa
\else\stepcounter{chronos@startyear}%
\fi
\else\stepcounter{chronos@startyear}%
\fi
\else
\pgfmathsetcounter{chronos@startyear}{\chronos@stepfrom}%
\fi
\def\tempa{12}%
\def\tempb{31}%
\ifx\chronos@endmonth\tempa
\ifx\chronos@endday\tempb
\stepcounter{chronos@endyear}%
\fi
\fi
\ifnum\value{chronos@endyear}<\value{chronos@startyear}\setcounter{chronos@endyear}{\thechronos@startyear}\fi
\pgfmathsetmacro\chronos@nextstep{int(((\thechronos@startyear+\chronos@stepyears)>\thechronos@endyear) ? \thechronos@endyear : (\thechronos@startyear+\chronos@stepyears))}%
\ifchronos@yearzero\setcounter{chronos@tempcnta}{1}\else\setcounter{chronos@tempcnta}{0}\fi
\foreach \b [evaluate=\b as \i using {((\b==0)&&(\thechronos@tempcnta==0)) ? 1 : int(\b)}, remember=\i as \ilast (initially \pi)] in {\thechronos@startyear,\chronos@nextstep,...,\thechronos@endyear} {%
\ifnum\i=\ilast\relax
\else
\pgfcalendardatetojulian{{\i}-01-01}{\c@chronos@yeardate}%
\ifchronos@yearzero\relax\else\ifnum0<\i\addtocounter{chronos@yeardate}{-366}\fi\fi
\pgfmathsetmacro\chronos@tempa{(\thechronos@yeardate-\thechronos@startdate)*\chronos@unit}%
\ifchronos@yearsonline
\node (chronos@year@\i) [/chronos/.cd, timeline@years, timeline year on line] at (\chronos@tempa pt,0) {\chronos@timelinefont\chronos@showyear{\i}};
\ifchronos@marks
\path [/chronos/timeline mark on line] (chronos@year@\i.south) -- (chronos@year@\i |- chronos base);
\path [/chronos/timeline mark on line] (chronos@year@\i.north) -- (chronos@year@\i |- chronos top);
\fi
\ifchronos@markeras
\path (chronos pre) +(\chronos@timelinemargin,0) node (chronos@bce) [/chronos/.cd, timeline@years, timeline year on line] {\chronos@timelinefont\chronos@bce};
\path (chronos post) +(-\chronos@timelinemargin,0) node (chronos@ce) [/chronos/.cd, timeline@years, timeline year on line] {\chronos@timelinefont\chronos@ce};
\fi
\else
\node (chronos@year@\i) [/chronos/.cd, timeline@years, timeline year off line] at (\chronos@tempa pt,0) {\chronos@timelinefont\chronos@showyear{\i}};
\ifchronos@marks
\path [shorten <=.5*\chronos@height, /chronos/timeline mark off line] (\chronos@tempa pt, 0) -- (chronos@year@\i);
\fi
\ifchronos@markeras
\path (chronos pre) +(\chronos@timelinemargin,0) node (chronos@bce) [/chronos/.cd, timeline@years, timeline year off line] {\chronos@timelinefont\chronos@bce};
\path (chronos post) +(-\chronos@timelinemargin,0) node (chronos@ce) [/chronos/.cd, timeline@years, timeline year off line] {\chronos@timelinefont\chronos@ce};
\fi
\fi
\fi
}%
\else
\ifchronos@markeras
\path (chronos pre) +(\chronos@timelinemargin,0) node (chronos@bce) [/chronos/.cd, timeline@years, timeline year off line] {\chronos@timelinefont\chronos@bce};
\path (chronos post) +(-\chronos@timelinemargin,0) node (chronos@ce) [/chronos/.cd, timeline@years, timeline year off line] {\chronos@timelinefont\chronos@ce};
\fi
\fi
\ifchronos@eventyearsonline
\tikzset{%
/chronos/timeline years=on line,
}%
\fi
},
chronos set date/.code args={#1:#2:#3:#4}{%
\pgfcalendardatetojulian{{#1}-#2-#3}{\c@chronos@date}%
\setcounter{chronos@#4date}{\thechronos@date}%
\ifchronos@yearzero\relax
\else
\setcounter{chronos@tempcnta}{#1}%
\ifnum0<\value{chronos@tempcnta}%
\addtocounter{chronos@#4date}{-366}%
\fi
\fi
\expandafter\def\csname chronos@#4year\endcsname{#1}%
\expandafter\def\csname chronos@#4month\endcsname{#2}%
\expandafter\def\csname chronos@#4day\endcsname{#3}%
},
chronos date/.style args={#1-#2-#3}{%
/tikz/chronos set date/.expanded={#1:#2:#3:thing}%
},
chronos period date/.style args={#1-#2-#3}{%
/tikz/chronos set date/.expanded={#1:#2:#3:otherthing}%
},
/chronos/.search also={/tikz},
/chronos/.cd,
timeline config/.code={},
date format/.code={%
\chronos@setdateformat{#1}%
},
year format/.code={%
\chronos@setyearformat{#1}%
},
step years/.store in=\chronos@stepyears,
step from year/.store in=\chronos@stepfrom,
start date/.style args={#1-#2-#3}{%
/chronos/timeline config/.append code={%
\tikzset{/tikz/chronos set date/.expanded={#1:#2:#3:start}}%
},
},
end date/.style args={#1-#2-#3}{%
/chronos/timeline config/.append code={%
\tikzset{/tikz/chronos set date/.expanded={#1:#2:#3:end}}%
},
},
ce year label/.store in=\chronos@yearce,
bce year label/.store in=\chronos@yearbce,
timeline ce label/.store in=\chronos@ce,
timeline bce label/.store in=\chronos@bce,
timeline width/.store in=\chronos@width,
timeline height/.store in=\chronos@height,
width/.forward to=/chronos/timeline width,
height/.forward to=/chronos/timeline height,
timeline border height/.store in=\chronos@borderheight,
timeline border inner colour/.code={\colorlet{chronos@borderinner}{#1}},
timeline border outer colour/.code={\colorlet{chronos@borderouter}{#1}},
timeline mark eras/.is if=chronos@markeras,
timeline margin/.store in=\chronos@timelinemargin,
timeline font/.store in=\chronos@timelinefont,
timeline years set/.store in=\chronos@timelineyears,
timeline years/.is choice,
timeline years/.forward to=/chronos/timeline years set,
timeline years/above/.code={%
\tikzset{%
/chronos/timeline@years/.style={above, anchor=south, yshift=.5*\chronos@height},
}%
},
timeline years/below/.code={%
\tikzset{%
/chronos/timeline@years/.style={below, anchor=north, yshift=-.5*\chronos@height},
}%
},
timeline years/on line/.code={%
\chronos@yearsonlinetrue
\tikzset{%
/chronos/timeline@years/.style={anchor=center},
}%
},
only years/.code={%
\edef\tempa{}%
\edef\tempb{#1}%
\ifx\tempa\tempb\chronos@setdateformat{!Y}\else\chronos@setdateformat{#1}\fi
\tikzset{%
/tikz/chronos date/.style={%
/tikz/chronos set date/.expanded={##1:01:01:thing}%
},
/tikz/chronos period date/.style={%
/tikz/chronos set date/.expanded={##1:01:01:otherthing}%
},
}%
},
only text/.code={%
\tikzset{/chronos/only years}%
\chronos@setdateformat{}%
\chronos@onlytexttrue
},
year zero/.is if=chronos@yearzero,
background/.code={%
\colorlet{chronos@background}{#1}%
},
timeline marks/.is if=chronos@marks,
timeline show years/.is if=chronos@timeline@showyears,
timeline no years/.code={%
\tikzset{%
/chronos/timeline show years=false,
}%
},
lines/.style={draw, {Triangle[width=0pt 3,reversed,length=0pt 1.5]}-{Triangle[width=0pt 3,reversed,length=0pt 1.5]}, shorten <={.5*\chronos@height+\chronos@borderheight}},
events/.style={fill=chronos@background, fill opacity=.75, text opacity=1, draw opacity=1, rounded corners, align=center, font=\footnotesize},
period/.style={draw},
period event line/.style={/chronos/lines},
period event/.style={/chronos/events},
event line/.style={/chronos/lines},
event/.style={/chronos/events},
event years on line/.is if=chronos@eventyearsonline,
event year on line/.style={/chronos/timeline@years, /chronos/timeline year on line},
event dates split/.is if=chronos@eventdatessplit,
event date split/.style={/chronos/event},
event distance/.store in=\chronos@eventdistance,
special date/.store in=\chronos@specialdate,
timeline@line/.style={draw},
timeline line/.chronos too=timeline@line,
timeline year off line/.style={fill=chronos@background, text opacity=1, align=center, fill opacity=.75},
timeline mark off line/.style={draw, {Triangle[width=0pt 3,reversed,length=0pt 1.5]}-, thin, shorten >=-2pt},
timeline year on line/.style={text=chronos@background, inner sep=1pt, align=center},
timeline mark on line/.style={draw=chronos@background, shorten >=1.5pt},
timeline mark too/.code={%
\tikzset{%
/chronos/.cd,
timeline mark on line/.append style={#1},
timeline mark off line/.append style={#1},
}%
},
timeline year too/.code={%
\tikzset{%
/chronos/.cd,
timeline year on line/.append style={#1},
timeline year off line/.append style={#1},
}%
},
timeline mark/.forward to=/chronos/timeline mark too,
timeline year/.forward to=/chronos/timeline year too,
start date=1001-10-01,
end date=1003-06-14,
timeline width=100mm,
timeline height=1pt,
timeline border height=0pt,
chronos date=1850-01-01,
chronos period date=1851-01-01,
step years=1,
timeline years=above,
background=white,
timeline border inner colour=black,
timeline border outer colour=chronos@background,
step from year=none,
special date=none,
ce year label={\textsc{ce}},
bce year label={\textsc{bce}},
event distance=-10pt,
timeline ce label={CE},
timeline bce label={BCE},
timeline margin=10pt,
timeline font=\sffamily,
}
\NewDocumentCommand \chronosevent { O {} m O {} +m D () { \chronos@eventdistance } }
{%
\tikzset{%
chronos date/.expanded={#2},
}%
\pgfmathsetmacro\chronos@offset{(#5 < 0pt) ? (#5-.5*\chronos@height-\chronos@borderheight) : (#5+.5*\chronos@height+\chronos@borderheight)}%
\pgfmathsetmacro\chronos@anchor{(#5 < 0pt) ? "north" : "south"}%
\scoped[on background layer]{%
\ifchronos@eventdatessplit
\ifchronos@onlytext\relax
\else
\pgfmathsetmacro\chronos@invanchor{(#5 < 0pt) ? "south" : "north"}%
\path [postaction={/chronos/event line, #1}] ({(\thechronos@thingdate-\thechronos@startdate)*\chronos@unit pt},0) -- +(0,-\chronos@offset pt) node [anchor=\chronos@invanchor, /chronos/event date split, #3] {\chronos@showdate{thing}};
\fi
\path [postaction={/chronos/event line, #1}] ({(\thechronos@thingdate-\thechronos@startdate)*\chronos@unit pt},0) -- +(0,\chronos@offset pt) node [anchor=\chronos@anchor, /chronos/event, #3] {#4};
\else
\path [postaction={/chronos/event line, #1}] ({(\thechronos@thingdate-\thechronos@startdate)*\chronos@unit pt},0) -- +(0,\chronos@offset pt) node [anchor=\chronos@anchor, /chronos/event, #3] {\ifchronos@onlytext\relax\else\chronos@showdate{thing}\\\fi#4};
\fi
}%
\ifchronos@eventyearsonline
\edef\tempa{none}%
\edef\tempb{\chronos@specialdate}%
\ifx\tempa\tempb\else\let\chronos@thingyear\chronos@specialdate\tikzset{/chronos/special date=none}\fi
\node [/chronos/.cd, event year on line] at ({(\thechronos@thingdate-\thechronos@startdate)*\chronos@unit pt},0) {\chronos@thingyear};
\fi
}
\NewDocumentCommand \chronosspecialdate { m }
{%
\tikzset{%
/chronos/special date=#1,
}%
}
\NewDocumentCommand \chronosperiod { O {} m O {} m O {} +m D () { \chronos@eventdistance } }
{%
\tikzset{%
chronos date/.expanded={#2}, chronos period date/.expanded={#4}
}%
\pgfmathsetmacro\chronos@offset{(#7 < 0pt) ? (#7-.5*\chronos@height-\chronos@borderheight) : (#7+.5*\chronos@height+\chronos@borderheight)}%
\pgfmathsetmacro\chronos@anchor{(#7 < 0pt) ? "north" : "south"}%
\ifchronos@yearsonline
\pgfmathsetmacro\chronos@borderoffset{(#7 < 0pt) ? (-.5*\[email protected]*\chronos@borderheight) : (.5*\chronos@height+.5*\chronos@borderheight)}%
\path [postaction={line width=\chronos@borderheight, /chronos/period, blend mode=overlay, #1}] ({(\thechronos@thingdate-\thechronos@startdate)*\chronos@unit pt},\chronos@borderoffset pt) -- ({(\thechronos@otherthingdate-\thechronos@startdate)*\chronos@unit pt},\chronos@borderoffset pt);
\else
\path [postaction={line width=\chronos@height, /chronos/period, #1}] ({(\thechronos@thingdate-\thechronos@startdate)*\chronos@unit pt},0) -- ({(\thechronos@otherthingdate-\thechronos@startdate)*\chronos@unit pt},0);
\fi
\scoped[on background layer]{\path [postaction={/chronos/period event line, #3}] ({(.5*\thechronos@otherthingdate+.5*\thechronos@thingdate-\thechronos@startdate)*\chronos@unit pt},0) -- +(0,\chronos@offset pt) node [anchor=\chronos@anchor, /chronos/period event, #5] {\ifchronos@onlytext\relax\else\chronos@showdate{thing}--\chronos@showdate{otherthing}\\\fi#6};}
}
\makeatother
\begin{document}
\begin{tikzpicture}
[
chronos={%
timeline width=100mm,
timeline height=2mm,
start date=1995-01-01,
end date=2008-01-01,
only years,
events/.append style={text width=20mm},
timeline line={shorten >=-10mm, -{Triangle Cap[length=10mm]}},
timeline font=\footnotesize,
timeline marks,
only text,
}
]
\chronosevent{1995}{Debate on CEPA Begins}(-5pt)
\chronosevent{1999}{CEPA Amendments Passed}(-15pt)
\chronosevent{2007}[text width=30mm]{BPA Risk Assessment Begins}(-30pt)
\chronosevent{2006}{Categorization of DSL}(-5pt)
\path [every node/.style={font=\large\bfseries\sffamily}] (chronos start |- current bounding box.north) node (n) [above] {1995} (chronos end |- n) node {2008};
\end{tikzpicture}
\begin{tikzpicture}
[
chronos={%
timeline width=100mm,
start date=1995-01-01,
end date=2008-01-01,
events/.append style={text width=20mm},
timeline font=\footnotesize,
timeline marks,
timeline height=5mm,
only text,
timeline years=on line,
timeline border height=5pt,
},
my box/.style={draw=#1, rounded corners, text=#1, thick},
]
\chronosevent[blue]{1995}[my box=blue]{Debate on CEPA Begins}(-5pt)
\chronosevent[green!75!black]{1999}[my box=green!75!black]{CEPA Amendments Passed}(-15pt)
\chronosevent[magenta]{2007}[text width=30mm, my box=magenta]{BPA Risk Assessment Begins}(-30pt)
\chronosevent[orange]{2006}[my box=orange]{Categorization of DSL}(-5pt)
\path [every node/.style={font=\large\bfseries\sffamily}] (chronos start |- current bounding box.north) node (n) [above] {1995} (chronos end |- n) node {2008};
\end{tikzpicture}
\end{document}
Two versions of your timeline from the code above:
