Encabezado de capítulo moderno

Question

Me gustaría reproducir este diseño de encabezado de capítulo que se ve en la imagen de abajo. Supongo que titleec es el camino a seguir, pero tengo problemas para alinear el nombre del capítulo y el número de capítulo. Además, ¿cómo maneja los títulos de capítulos muy largos para que no choquen con el número?

Answer 1

A continuación, se muestra un ejemplo de cómo se puede hacer:

\documentclass[12pt, a4paper,oneside]{book}
\usepackage{geometry}
\usepackage{newtxtext} 
\usepackage[svgnames]{xcolor}
\usepackage{graphicx} 
\usepackage[newlinetospace]{titlesec}

\titlespacing*{\chapter}{0pt}{*-4}{*8}
\titleformat{\chapter}[block]{\sffamily\bfseries\Huge\rlap{\hspace*{\textwidth} \scalebox{0.06}{\includegraphics{twd}}\vspace{-2ex}} \color{CornflowerBlue}\rlap{\rule{\paperwidth}{3pt}}}%
{\rlap{\makebox[\dimexpr\textwidth+\marginparsep+0.6 \marginparwidth][r]{\raisebox{-0.6\height}{\scalebox{2}{\thechapter}}}}}%
{0pt}{}%

  \begin{document}

  \setcounter{chapter}{3}
  \chapter{Tweedledum\\[-1ex] and Tweedledee}

They were standing under a tree, each with an arm round the other’s neck, and Alice knew which was which in a moment, because one of them had ‘DUM’ embroidered on his collar, and the other ‘DEE.’ ‘I suppose they’ve each got “TWEEDLE” round at the back of the collar,’ she said to herself.

 They stood so still that she quite forgot they were alive, and she was just looking round to see if the word “TWEEDLE” was written at the back of each collar, when she was startled by a voice coming from the one marked ‘DUM.’

 ‘If you think we’re wax-works,’ he said, ‘you ought to pay, you know. Wax-works weren’t made to be looked at for nothing, nohow!’

 ‘Contrariwise,’ added the one marked ‘DEE,’ ‘if you think we’re alive, you ought to speak.’

  \end{document}