Problema con moderntimeline después de personalizar \section en moderncv

Question

Personalicé el \sectioncomando moderncvpara obtener un desvanecimiento de color en los títulos de las secciones. Pero ahora esto me arruina moderntimeliney mueve las etiquetas. Ya descubrí que esto se debe a \usetikzlibrary{positioning}. ¿Alguien puede descubrir cómo usar mi personalizado \sectionsin afectar el moderntimeline?

\documentclass{moderncv}
\usepackage[firstyear=2007,lastyear=2015]{moderntimeline}
\usepackage{tikz}
\usetikzlibrary{fadings,patterns,positioning,fit,calc}

\tikzset{
  zero sep/.style = {inner sep=0pt, outer sep=0pt},
}

\moderncvstyle{classic}

\makeatletter
\renewcommand\section[1]{%
  \par\addvspace{2.5ex}%
  \phantomsection{}% reset the anchor for hyperrefs
  \addcontentsline{toc}{section}{#1}%
  \pgfmathsetmacro\randref{rand}
  \begin{tikzfadingfrompicture}[name=tikzsection \randref]
    \node[fill=white,anchor=south east,zero sep,minimum width=5cm,minimum height=2.5mm] (box node){};
    \node [text=white,anchor=base west,text depth=5pt,text height=12pt,zero sep,
    font=\normalfont\Large\bfseries,right=10pt of box node,
    text width=12cm,align=left] (text node) {\strut#1\strut};
    \node [fit={(box node)(text node)
      },zero sep] (myfit) {};
    \path let \p1=(myfit.south west), \p2=(myfit.north east), \n1={\x2-\x1}, \n2={\y2-\y1} in
    \pgfextra{\xdef\lenx{\n1} \xdef\leny{\n2}};
  \end{tikzfadingfrompicture}
    \begin{tikzpicture}[baseline=.5*5pt-.5*12pt]
      \path[path fading=tikzsection \randref, fit fading=false,left color=blue, right color=black]
      (-.5*\lenx,-.5*\leny) rectangle ++(\lenx,\leny);
    \end{tikzpicture}%
    \par\nobreak\addvspace{1ex}\@afterheading%
}
\makeatother 

\begin{document}

\section{First section}
\tlcventry{2008}{2009}{Student in aerospace engineering}{University of Atlantis}{Atlantis}{}{Majors: Aqua Systems, Fluid Mechanics}
\section{Second muuuuch longer section}
Some text
\section{Short}
Some text

\end{document}

Answer 1

Esto parece ser un error en moderntimeline. Le sugiero que se comunique con el autor del paquete sobre este problema.

Pude localizar el problema en la definición de \tltextstart, específicamente, en la definición del tl@startyearestilo utilizado para componer el año de inicio; la definición original es

\newcommand{\tltextstart}[2][base west]{%
   \tikzset{
       tl@startyear/.style={
           font=#2,
           name=tl@startyear,
           above=\tl@textstartabove,
           inner xsep=0pt,
           anchor=#1,
       }
   }
}

y el problema es que \tl@textstartaboveno parece actualizarse adecuadamente cuando se usa \tlcventry. Una solución alternativa es utilizar

\tikzset{
     tl@startyear/.style={
         font=\scriptsize,
         name=tl@startyear,
         above=\tl@width+1pt,
         inner xsep=0pt,
         anchor=base west,
     }
}

Un ejemplo completo:

\documentclass{moderncv}
\usepackage[firstyear=2007,lastyear=2015]{moderntimeline}
\usepackage{tikz}
\usetikzlibrary{fadings,patterns,positioning,fit,calc}

\tikzset{
  zero sep/.style = {inner sep=0pt, outer sep=0pt},
}

\moderncvstyle{classic}

\makeatletter
\tikzset{
     tl@startyear/.style={
         font=\scriptsize,
         name=tl@startyear,
         above=\tl@width+1pt,
         inner xsep=0pt,
         anchor=base west,
     }
}

\renewcommand\section[1]{%
  \par\addvspace{2.5ex}%
  \phantomsection{}% reset the anchor for hyperrefs
  \addcontentsline{toc}{section}{#1}%
  \pgfmathsetmacro\randref{rand}
  \begin{tikzfadingfrompicture}[name=tikzsection \randref]
    \node[fill=white,anchor=south east,zero sep,minimum width=5cm,minimum height=2.5mm] (box node){};
    \node [text=white,anchor=base west,text depth=5pt,text height=12pt,zero sep,
    font=\normalfont\Large\bfseries,right=10pt of box node,
    text width=12cm,align=left] (text node) {\strut#1\strut};
    \node [fit={(box node)(text node)
      },zero sep] (myfit) {};
    \path let \p1=(myfit.south west), \p2=(myfit.north east), \n1={\x2-\x1}, \n2={\y2-\y1} in
    \pgfextra{\xdef\lenx{\n1} \xdef\leny{\n2}};
  \end{tikzfadingfrompicture}
    \begin{tikzpicture}[baseline=.5*5pt-.5*12pt]
      \path[path fading=tikzsection \randref, fit fading=false,left color=blue, right color=black]
      (-.5*\lenx,-.5*\leny) rectangle ++(\lenx,\leny);
    \end{tikzpicture}%
    \par\nobreak\addvspace{1ex}\@afterheading%
}
\makeatother 

\firstname{John}
\lastname{Doe}

\begin{document}

\section{First section}
\tlcventry{2008}{2009}{Student in aerospace engineering}{University of Atlantis}{Atlantis}{}{Majors: Aqua Systems, Fluid Mechanics}
\section{Second much longer section}
Some text
\section{Short}
Some text

\end{document}

El resultado: