Set rectangle split with the same size (especially the width)？

tikz-pgftikz-stylesxetex

I'm using rectangle split to draw link nodes:

How to ensure every rectangle split with the same size, especially with the same width! no matter it is empty or with one digit or with two digits (maximum two digits, or like "-1")

MWE(my code):

\documentclass[border=10pt]{standalone}
\usepackage{tikz, tkz-graph}
\usetikzlibrary{arrows,positioning}
\thispagestyle{empty}
\usepackage{memorygraphs}
\tikzset{
    phead/.style={
           rectangle, draw, text height=3mm, text width=3mm,
       text centered, node distance=3cm, inner sep=0pt
    },
    block/.style={
            draw,
            %text height=height("I"),
            %text depth=depth("I"),
            anchor=mid,
            %inner sep=0pt,
            %minimum width=0.6cm,
            every block,
    },
    arity/.style={
        block,
        rectangle split,
        rectangle split parts=#1+1,
        rectangle split horizontal,
        rectangle split every empty part={},
        rectangle split empty part width=0.6cm,
        minimum size=0.6cm,
    }   
}
\begin{document}
\begin{tikzpicture}[memory graph]

\node[phead, label=above:head] (head) {};

\def\prevname{head}
\foreach \name/\labela/\val in {1/7/,2/7/,3//,4/12/,5/13/,6/0/-1}{
    \ifnum \name=1
        \node[block,arity=1,right=of \prevname] (a\name) {\labela};
        \draw[ref] (\prevname.center) -- (a\name);
    \else
        \node[block,arity=1,right=of \prevname.arg 1 east] (a\name) {\labela};
        \draw[ref] (\prevname.arg 1 center) -- (a\name);
    \fi
    
    
    \xdef\prevname{a\name}
}

\end{tikzpicture}
\end{document}

You can see I've override some tikz style of the memorygraphics in the code above, like block and arity

Some code(style) of package memeorygraphics: https://ctan.org/pkg/memorygraphs

\tikzset{
    memory graph/.style={
        node distance=1.5em,
    },
    every block/.style={},
    block/.style={
        draw,
        text height=height("I"),
        text depth=depth("I"),
        anchor=mid,
        every block,
    },
    block/.append code={%
        \let\arg\memorygraphs@arg%
        \gdef\memorygraphs@arity{0}%
    },
    block mark north east/.style={
        append after command={
            \pgfextra
                \pgfinterruptpath
                \draw[#1]
                    ($(\tikzlastnode.head north east)-(\ifnum\memorygraphs@arity=0 .5\pgflinewidth\else0\fi,.5\pgflinewidth)$)
                    -- +(0,-\memorygraphs@marklength)
                    -- ($(\tikzlastnode.head north east)-(\ifnum\memorygraphs@arity=0 .5\pgflinewidth\else0\fi+\memorygraphs@marklength,.5\pgflinewidth)$)
                    -- cycle;
                \endpgfinterruptpath
            \endpgfextra
        },
    },
    block mark south east/.style={
        append after command={
            \pgfextra
                \pgfinterruptpath
                \draw[#1]
                    ($(\tikzlastnode.head south east)+(\ifnum\memorygraphs@arity=0 -.5\pgflinewidth\else0\fi,.5\pgflinewidth)$)
                    -- +(0,\memorygraphs@marklength)
                    -- ($(\tikzlastnode.head south east)+(\ifnum\memorygraphs@arity=0 -.5\pgflinewidth\else0\fi-\memorygraphs@marklength,.5\pgflinewidth)$)
                    -- cycle;
                \endpgfinterruptpath
            \endpgfextra
        },
    },
    block mark north west/.style={
        append after command={
            \pgfextra
                \pgfinterruptpath
                \draw[#1]
                    ($(\tikzlastnode.head north west)+(.5\pgflinewidth,-.5\pgflinewidth)$)
                    -- +(0,-\memorygraphs@marklength)
                    -- ($(\tikzlastnode.head north west)-(-.5\pgflinewidth-\memorygraphs@marklength,.5\pgflinewidth)$)
                    -- cycle;
                \endpgfinterruptpath
            \endpgfextra
        },
    },
    block mark south west/.style={
        append after command={
            \pgfextra
                \pgfinterruptpath
                \draw[#1]
                    ($(\tikzlastnode.head south west)+(.5\pgflinewidth,.5\pgflinewidth)$)
                    -- +(0,\memorygraphs@marklength)
                    -- ($(\tikzlastnode.head south west)+(.5\pgflinewidth+\memorygraphs@marklength,.5\pgflinewidth)$)
                    -- cycle;
                \endpgfinterruptpath
            \endpgfextra
        },
    },
    arity/.style={
        block,
        rectangle split,
        rectangle split parts=#1+1,
        rectangle split horizontal,
        rectangle split every empty part={},
        rectangle split empty part width=.2em,
    },
    arity/.append code={%
        \pgfmathsetcount\c@pgf@counta{\pgfkeysvalueof{/pgf/rectangle split parts}}%
        \ifnum\c@pgf@counta=0\else\advance\c@pgf@counta by-1 \fi
        \xdef\memorygraphs@arity{\the\c@pgf@counta}%
    },
  ref/.style={
        {Circle[length=3pt]}-Latex,
        shorten <=-1.5pt,
        rounded corners=.2em,
    },
}

Best Answer

Small variation of nice @Peter Grill answer (+1) with pure tikz, i.e.: without memorygraphs package:

\documentclass[border=10pt]{standalone}
\usepackage{calc}
\usepackage{tikz}
\usetikzlibrary{arrows.meta,
                chains,
                positioning,
                shapes.multipart}

\newlength\MinimumWidth
\setlength{\MinimumWidth}{\widthof{00}}
\tikzset{
arr/.style={{Circle[length=2pt 4, sep=0pt -4]}-Stealth},
arity/.style={
        rectangle split,
        rectangle split parts=#1+1,
        rectangle split horizontal,
        minimum height=10pt,
        rectangle split empty part width=\MinimumWidth-\pgfkeysvalueof{/pgf/inner xsep},
        text width=\MinimumWidth, align=center,
        execute at end node=\vphantom{fg},
        draw,
        on chain},
box/.style = {draw, text width=#1, minimum size=#1, inner sep=0pt},
box/.default = 4mm
        }
        
\begin{document}
    \begin{tikzpicture}[
node distance = 8mm and 7mm,
  start chain = on chain,
                        ]
\node[arity=0, box, label=head] (a0) {};
\foreach \labela/\val [count=\i from 0, count=\j] in {7/,7/,/,12/,13/,0/}%
{
\node[arity=1] (a\j) {\labela};
\draw[arr] (a\i.two north |- a\i.east) -- (a\j);
}

\node[arity=0, box, label=head,
      below=of a0] (b0) {};
\foreach \labela/\val [count=\i from 0, count=\j] in {17/,27/,/,2/,3/,0/}%
{
\node[arity=1] (b\j) {\labela};
\draw[arr] (b\i.two north |- b\i.east) -- (b\j);
}
\end{tikzpicture}
\end{document}

Edit: Removed are colors of nodes borders, now all nodes' parts has equal width and height.

Shape declaration:

\pgfdeclareshape{oplus}
%
% Shaped like '\oplus' math symbol. Based on 'circle' shape
%
{%
  % All anchors are taken from the 'circle' shape:
  \inheritsavedanchors[from={circle}]%
  \inheritanchor[from={circle}]{center}%
  \inheritanchor[from={circle}]{mid}%
  \inheritanchor[from={circle}]{base}%
  \inheritanchor[from={circle}]{north}%
  \inheritanchor[from={circle}]{south}%
  \inheritanchor[from={circle}]{west}%
  \inheritanchor[from={circle}]{east}%
  \inheritanchor[from={circle}]{mid west}%
  \inheritanchor[from={circle}]{mid east}%
  \inheritanchor[from={circle}]{base west}%
  \inheritanchor[from={circle}]{base east}%
  \inheritanchor[from={circle}]{north west}%
  \inheritanchor[from={circle}]{south west}%
  \inheritanchor[from={circle}]{north east}%
  \inheritanchor[from={circle}]{south east}%
  \inheritanchorborder[from={circle}]%
  %
  % Only the background path is different
  %
  \backgroundpath{%
    % First the existing 'circle' code:
    \pgfutil@tempdima=\radius%
    \pgfmathsetlength{\pgf@xb}{\pgfkeysvalueof{/pgf/outer xsep}}%
    \pgfmathsetlength{\pgf@yb}{\pgfkeysvalueof{/pgf/outer ysep}}%
    \ifdim\pgf@xb<\pgf@yb%
      \advance\pgfutil@tempdima by-\pgf@yb%
    \else%
      \advance\pgfutil@tempdima by-\pgf@xb%
    \fi%
    \pgfpathcircle{\centerpoint}{\pgfutil@tempdima}%
    %
    % Now the | and -- lines:
    \pgfmoveto{\pgfpointadd{\centerpoint}{\pgfpoint{0pt}{\pgfutil@tempdima}}}%
    \pgflineto{\pgfpointadd{\centerpoint}{\pgfpoint{0pt}{-\pgfutil@tempdima}}}%
    \pgfmoveto{\pgfpointadd{\centerpoint}{\pgfpoint{\pgfutil@tempdima}{0pt}}}%
    \pgflineto{\pgfpointadd{\centerpoint}{\pgfpoint{-\pgfutil@tempdima}{0pt}}}%
  }%
}

Usage example:

\documentclass{standalone}

\usepackage{tikz}
\usepackage{pgfshape_oplus}

\begin{document}
\begin{tikzpicture}
  \node [draw=blue,shape=oplus] {Test};
\end{tikzpicture}
\end{document}

Result:

Result

You might also want to draw the additional lines in the \foregroundpath instead. For this see the forbidden sign shape in the file pgflibraryshapes.symbols.code.tex is an good example.

[Tex/LaTex] How to define the default vertical distance between nodes

I don't really get the question so I hope this is what you wanted. If you include a full document (such that we copy paste and see the problem on our systems) things are much more easier.

Here, you can change the default setting within a scope but your block style had a node distance which was resetting every time it is issued. I've made it 2mm such that we can see the difference easier.

\documentclass[tikz]{standalone}
\usetikzlibrary{arrows,shapes.geometric,positioning}

\begin{document}
\begin{tikzpicture}[decision/.style={diamond, draw, text width=4.5em, text badly centered, node distance=3.5cm, inner sep=0pt},
                    block/.style   ={rectangle, draw, text width=6em, text centered, rounded corners, minimum height=4em, minimum height=2em},
                    cloud/.style   ={draw, ellipse, minimum height=2em},
                    line/.style    ={draw,-latex'},
                    node distance = 1cm, 
                    auto]
    \node [block] (1st) {1st};
    \node [block, right= of 1st]  (2nd1) {2nd1};
\begin{scope}[node distance=2mm and 10mm]%Here we change it for everything inside this scope
    \node [block, above= of 2nd1] (2nd2) {2nd2};
    \node [block, below= of 2nd1] (2nd3) {2nd3};
    \node [block, right= of 2nd1] (3rd1) {3rd1};
    \node [block, above= of 3rd1] (3rd2) {3rd2};
    \node [block, above= of 3rd2] (3rd3) {3rd3};
\end{scope}
    \node [block, below= of 3rd1] (3rd4) {3rd4};
    \node [block, below= of 3rd4] (3rd5) {3rd5};

    \path [line] (1st) -- (2nd1);
    \path [line] (2nd1) -- (2nd2);
    \path [line] (2nd1) -- (2nd3);
    \path [line] (2nd2) -- (3rd3);
    \path [line] (2nd1) -- (3rd1);
    \path [line] (1st) -- (2nd1);
\end{tikzpicture}
\end{document}

enter image description here

Best Answer

Related Solutions

[Tex/LaTex] How to draw inside a TikZ node, using node style

Shape declaration:

Usage example:

Result:

[Tex/LaTex] How to define the default vertical distance between nodes

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