[Tex/LaTex] TikZ rectangle split with changing alignment

Question

I try to draw tikz nodes with rectangle split. I want the first part to be centered and the second part aligned left. This is what I have tried:

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{positioning,shapes}

\begin{document}
  \tikzstyle{box}=[rectangle, draw=black, text width=3cm,
                   rectangle split, rectangle split parts=2]
  \begin{tikzpicture}
    \node (A) [box] {
      First
      \nodepart{second}Second
    };
    \node (B) [below=of A, box] {
      \begin{center}First\end{center}
      \nodepart{second}Second
    };
    \node (C) [below=of B, box, align=center] {
      First
      \nodepart{second}\flushleft Second
    };
  \end{tikzpicture}
\end{document}

A has the correct size, but everything is left-aligned.

B has correct alignment, but the first part is larger than it needs to be.

C also has correct alignment, but the second part is largen than it needs to be.

How to do this properly?

Answer 1

You can use the optional argument of nodepart.

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{shapes}
\begin{document}
  \tikzstyle{box}=[rectangle, draw=black, text width=3cm,
                   rectangle split, rectangle split parts=2]
  \begin{tikzpicture}
    \node[align=center] (A) [box] {
      First
      \nodepart[align=left]{second}Second
    };
  \end{tikzpicture}
\end{document}

results in