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+%% LaTeX2e file `etocsnippet-29.tex'
+%% generated by the `filecontentsdef' environment
+%% from source `etoc' on 2019/11/17.
+%%
+\begingroup
+% \newtoks\treetok % done in preamble
+% \newtoks\parttok
+
+\newcommand*\partnode {} % just to check we don't overwrite something
+\newcommand*\childnode {}
+
+\newcommand*\tmprotate {} % just to check we don't overwrite something
+\newcommand*\tmpoption {} % just to check we don't overwrite something
+\newcommand*\tmpstuff {} % just to check we don't overwrite something
+
+\newcommand*\appendtotok[2]{% #1=toks variable, #2=macro, expands once #2
+ #1\expandafter\expandafter\expandafter{\expandafter\the\expandafter #1#2}}
+
+\newcommand*{\appendchildtree}[3]{%
+% this is to construct "t1 child [#3]{t2}" from #1=t1 and #2=t2
+% t1 and t2 are two toks variable (not macros)
+% #3 = for example teal!60
+ \edef\tmpstuff {\the#1 child [#3]{\the#2}}%
+ #1\expandafter {\tmpstuff }%
+}
+
+\newcounter{partco}
+
+% 1,2,3,4,5,... -> 1,2,3,1,2,3,1,2,3
+\def\pseudomodthree #1{\numexpr #1 + 3 - 3*((#1+1)/3)\relax}
+
+\etocsetstyle{part}
+ {\etocskipfirstprefix}
+% This updates the global tree with the data from the previous
+% part and all its children sections. Moved here because for some parts the
+% sections are not displayed due to depth tags.
+ {\ifnum\value{partco}=3
+ \appendchildtree\treetok\parttok {branch color= green!50,level distance=10cm}%
+ \else
+\ifcase\pseudomodthree{\value{partco}}%
+ \or \appendchildtree\treetok\parttok {branch color= teal!60}% first
+ \or \appendchildtree\treetok\parttok {branch color= yellow!80}% second
+ \else\appendchildtree\treetok\parttok {branch color= green!50}% third and next ...
+ \fi\fi
+ }
+ {\stepcounter{partco}%
+% customize manually some TikZ set-up (should be done inside the TikZ thing I guess)
+ \def\tmpoption {}%
+ \def\tmprotate {}% first
+ %\ifnum\value{partco}=5 \def\tmprotate {[counterclockwise from =-40]}\fi
+ %\ifnum\value{partco}=8 \def\tmprotate {[counterclockwise from =-50]}\fi
+% define the part node
+ \edef\partnode{node \tmpoption
+ {\unexpanded\expandafter{\etocthelinkednumber}.
+ \unexpanded\expandafter{\etocthelinkedname}}\tmprotate }%
+% this is a starting point which will be filled it by the section children
+ \parttok\expandafter{\partnode}}
+ {\ifcase\pseudomodthree{\value{partco}}%
+ \or \appendchildtree\treetok\parttok {branch color= teal!60}% first
+ \or \appendchildtree\treetok\parttok {branch color= yellow!80}% second
+ \else\appendchildtree\treetok\parttok {branch color= green!50}% third and next ...
+ \fi
+ }
+
+\etocsetstyle{section}
+ {}
+ {}
+ {% define the section node
+ \edef\childnode{child {node {\unexpanded\expandafter{\etocthelinkednumber}
+ \unexpanded\expandafter{\etocthelinkedname}}}}%
+ % append it to the current \parttok
+ \appendtotok\parttok\childnode
+ }
+ {}
+
+\etocsettocstyle
+ {\setcounter{partco}{0}%
+ \treetok{\node [root concept]{\textbf{The \etoc documentation}}}}
+ {\global\appendtotok\treetok{ ;}}
+% The \global above is mandatory because etoc always typesets TOC inside a group
+
+\etocsetnexttocdepth{section}
+% use of depth tags to cut out some sections.
+\etocsettagdepth {preamble} {none}
+\etocsettagdepth {overview} {part}
+\etocsettagdepth {arbitrarily}{part}
+\etocsettagdepth {examples} {section}
+\etocsettagdepth {surprising} {part}
+\etocsettagdepth {linestyles} {part}
+\etocsettagdepth {globalcmds} {part}
+\etocsettagdepth {custom} {section}
+\etocsettagdepth {tips} {part}
+\etocsettagdepth {etocandworld}{part}
+\etocsettagdepth {code} {section}
+
+\tikzset{
+ branch color/.style={
+ concept color=#1!white,
+ every child/.append style={concept color=#1!white!30!white, font=\normalsize},
+ }
+}%
+
+\begin{figure}[thp!]
+\tableofcontents\label{toc:mindmap}%
+\centeredline{\resizebox{.85\paperwidth}{!}%
+{\begin{tikzpicture}[mindmap,
+ grow cyclic,
+ text width=2cm,
+ align=flush center,
+ nodes={concept},
+ concept color=orange!60,
+ root concept/.append style={text width=4cm, font=\Large},
+ level 1/.append style={level distance=5cm,sibling angle=40, text width=3cm},
+ level 2/.append style={level distance=7cm,sibling angle=30, text width=3cm},
+ level 1 concept/.append style={font=\normalsize},
+ ]
+\the\treetok
+\end{tikzpicture}}}
+\end{figure}
+\endgroup