My reference to my `tcolorbox` doesn't work

Question

I'm just trying to reference one of my example in my text but it's always labelled with the upper previous counter (here the section number).

My example environment is defined as exmp which are a tcolorbox environment itself. I know that the trouble probably comes from my newtcolorbox definition but I cannot find from where. If you have any idea, please tell me.

I'm working with the pdfLaTex compiler and here is my minimal code:

\documentclass[justified,notoc,numbers]{tufte-handout}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{graphicx}
\usepackage{xcolor}
\usepackage{color}
\usepackage[most]{tcolorbox}

%-----------FOR DEMO-----------
\usepackage{lipsum}

%=======================================================
%                      FONT STYLE
%=======================================================
\renewcommand{\rmdefault}{ptm}

%=======================================================
%                       COUNTERS
%=======================================================
\newcounter{theexample}[section]
\setcounter{secnumdepth}{3}
\setcounter{tocdepth}{3}
%=======================================================
%                       COLORS
%=======================================================
\definecolor{grey}{rgb}{0.9,0.9,0.9}
\definecolor{myColor}{rgb}{0.0, 0.5, 1.0}

\newtcolorbox{exmp}[1][]{
  breakable,
  enhanced,
  borderline west={2pt}{0pt}{myColor},
  sharp corners,
  boxrule=0pt,
  fonttitle={\large\bfseries},
  coltitle={black},
  title= {\textcolor{myColor}{Exemple  \stepcounter{theexample}\thesection.\arabic{theexample}:} #1\\},
  attach title to upper,
  right=0pt,
  top=0pt,
  bottom=0pt,
  frame hidden,
  colback=white!80!gray,
}



\title{test - tex.stackexchange.com}
\author[Author Name \& Firstname]{Author Name \& Firstname}


%=======================================================
%                       GEOMETRY
%=======================================================
\geometry{
  left=15mm,                    % left margin
  textwidth=140mm,              % main text block
  headsep=10mm,
  headheight = 0mm,
  marginparsep=7mm,             % gutter between main text block and margin notes
  marginparwidth=50mm,          % width of margin notes
  bottom = 1.5cm, 
  top = 1.7cm
}

%=======================================================
%                       DOCUMENT
%=======================================================
\begin{document}
\section{Chapter 1:}
\subsection{Section 1.}
[![\subsection{Section 2.}][1]][1]
\begin{exmp}[My example's title]
\label{EX1}
\lipsum[1]
\end{exmp}

Try to reference to my example counter using \texttt{ref\{EX1\}}: \ref{EX1}

\end{document}

So here the result is

when what I want is

Thanks a lot.

Related: How to define labels within a tcolorbox? To summarize:you might want to use [label=yourlabeltext] instead of the usual \label command. — leandriis, Aug 16 '19 at 21:03
Probably also interesting: Referring to example numbers in tcolorbox — leandriis, Aug 16 '19 at 21:11
@leandriis The trouble was that I didn't design my tcolorbox with an option field, my bad. — Guilian Deflandre, Aug 17 '19 at 11:18

score 1 · Accepted Answer · answered Aug 17 '19 at 08:03

SOLVED:

The trouble was indeed with my parameters declaration, I need 2 and not 1 parameter. #1 is my option while #2 will be my title. Here is the code of the solution:

\documentclass[justified,notoc,numbers]{tufte-handout}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{graphicx}
\usepackage{xcolor}
\usepackage{color}
\usepackage[most]{tcolorbox}

%-----------FOR DEMO-----------
\usepackage{lipsum}

%=======================================================
%                      FONT STYLE
%=======================================================
\renewcommand{\rmdefault}{ptm}

%=======================================================
%                       COUNTERS
%=======================================================
\newcounter{theexample}[section]
\setcounter{secnumdepth}{3}
\setcounter{tocdepth}{3}
%=======================================================
%                       COLORS
%=======================================================
\definecolor{grey}{rgb}{0.9,0.9,0.9}
\definecolor{myColor}{rgb}{0.0, 0.5, 1.0}

\newtcolorbox{exmp}[2][]{
  breakable,
  enhanced,
  borderline west={2pt}{0pt}{myColor},
  sharp corners,
  boxrule=0pt,
  fonttitle={\large\bfseries},
  coltitle={black},
  title= {\textcolor{myColor}{Exemple  \stepcounter{theexample}\thesection.\arabic{theexample}:} #2\\},
  attach title to upper,
  right=0pt,
  top=0pt,
  bottom=0pt,
  frame hidden,
  colback=white!80!gray,
  #1,
}



\title{test - tex.stackexchange.com}
\author[Author Name \& Firstname]{Author Name \& Firstname}


%=======================================================
%                       GEOMETRY
%=======================================================
\geometry{
  left=15mm,                    % left margin
  textwidth=140mm,              % main text block
  headsep=10mm,
  headheight = 0mm,
  marginparsep=7mm,             % gutter between main text block and margin notes
  marginparwidth=50mm,          % width of margin notes
  bottom = 1.5cm, 
  top = 1.7cm
}

%=======================================================
%                       DOCUMENT
%=======================================================
\begin{document}
\section{Chapter 1:}
\subsection{Section 1.}
\subsection{Section 2.}
\begin{exmp}[label = EX1]{My example's title}
\lipsum[1]
\end{exmp}

Try to reference to my example counter using \texttt{ref\{EX1\}}: 1.1

\end{document}

My reference to my `tcolorbox` doesn't work

1 Answers1