Reduce the height of a rectangle

Question

I am drawing a rectangle which is split into 2 parts:

\documentclass[runningheads,orivec]{llncs}
\usepackage{tikz}
\usetikzlibrary{positioning,shapes,shadows,arrows}
\begin{document}
\tikzstyle{abstract}=[rectangle, draw=black, rounded corners, fill=white!20, drop shadow,
    text centered, anchor=north, text=black, text width=3cm, scale=0.8]
\begin{figure}[H]
  \centering
  \begin{tikzpicture}[node distance=1cm,]
    \node(domain) [abstract, rectangle split, rectangle split parts=2, text width=7cm, text height = 0.1cm, text justified]
    {
      \begin{center}hehe\end{center}
      \nodepart{second}haha
    };
  \end{tikzpicture}
\end{figure}
\end{document}

There is just "hehe" in the first part, but the height is too much... text height = 0.1cm does not seem to work... Does anyone know how to reduce the height of the first part, let it adjusted in according to the text?

Answer 1

I'd use the text node part to center the text.

\documentclass[runningheads,orivec]{llncs}
\usepackage{tikz}
\usetikzlibrary{positioning,shapes,shadows,arrows}
\begin{document}
\tikzstyle{abstract}=[rectangle, draw=black, rounded corners, fill=white!20, drop shadow,
                      text centered, anchor=north, text=black, text width=3cm, scale=0.8]
\begin{figure}[H]
  \centering
  \begin{tikzpicture}[node distance=1cm,]
    \node(domain) [abstract, rectangle split,
                   every text node part/.style={align=center},
                   rectangle split parts=2,
                   text width=7cm,
                   text height = 0.1cm,
                   text justified]
    {
      hehe
      \nodepart{second}haha
    };
  \end{tikzpicture}
\end{figure}
\end{document}

Answer 2

you can use \centering instead of \center

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{positioning,shapes,shadows,arrows}
\begin{document}
\tikzstyle{abstract}=[rectangle, draw=black, rounded corners, fill=white!20, drop shadow,
    text centered, anchor=north, text=black, text width=3cm, scale=0.8]
\begin{figure}[H]
  \centering
  \begin{tikzpicture}[node distance=1cm,]
    \node(domain) [abstract, rectangle split, rectangle split parts=2, text width=7cm, text height = 0.1cm, text justified]
    {
      \begin{center}hehe\end{center}
      \nodepart{second}haha
    };
  \end{tikzpicture}
\end{figure}

\begin{figure}[H]
  \centering
  \begin{tikzpicture}[node distance=1cm,]
    \node(domain) [abstract, rectangle split, rectangle split parts=2, text width=7cm, text height = 0.1cm, text justified]
    {
      \centering hehe\par   
      \nodepart{second}haha
    };
  \end{tikzpicture}
\end{figure}
\end{document}

Answer 3

You can also give options to the nodepart independently.

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{shapes,shadows}
\tikzset{abstract/.style={
    rectangle, 
    draw=black, 
    rounded corners, 
    fill=white!20, 
    drop shadow,
    text centered, 
    anchor=north, 
    text=black, 
    text width=3cm, 
    text width=7cm,
    scale=0.8
    }
}
\begin{document}
\begin{tikzpicture}
\node(domain) [abstract, rectangle split, rectangle split parts=2 ]
{
  hehe
  \nodepart[text justified]{second} haha
};
\end{tikzpicture}
\end{document}