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tikz-flowchart.dtx
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tikz-flowchart.dtx
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% \iffalse meta-comment
%
% Copyright (C) 2019 by Geng Nan <nangeng@nwsuaf.edu.cn>
%
% This file may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either
% version 1.3 of this license or (at your option) any later
% version. The latest version of this license is in:
%
% http://www.latex-project.org/lppl.txt
%
% and version 1.3 or later is part of all distributions of
% LaTeX version 2005/12/01 or later.
%
% \fi
%
% \iffalse
%<package>\NeedsTeXFormat{LaTeX2e}[2011/06/27]
%<package>\ProvidesPackage{tikz-flowchart}
%<package> [2019/08/20 v1.0.01 draw flowchart using TikZ]
%
%<*driver>
\documentclass[a4paper]{ltxdoc}
\RecordChanges
\usepackage[UTF8,scheme=chinese]{ctex}
\usepackage{csquotes}
\usepackage{lmodern}
\usepackage{hyperref}
\usepackage{url}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{dtxdescribe}
\usepackage[debug]{tikz-flowchart}
\usepackage{float}
% \usepackage{parskip}
\renewcommand\figureautorefname\figurename
\renewcommand\tableautorefname\tablename
% default position for floats: H
\makeatletter
\renewcommand{\fps@figure}{H}
\renewcommand{\fps@table}{H}
\makeatother
%\setlength{\parindent}{0pt}
\def\thispkg{\pkg{tikz-flowchart}}
\def\tkz{Ti\emph{k}Z}
\newcommand{\note}[2][注意]{{%
\color{magenta}{\bfseries #1：}\emph{#2}}}
\makeatletter
\DeclareRobustCommand*\Arg[1]{\@meta{#1}}
\def\@meta#1{$\m@th\langle$\textnormal{\textit{#1}}$\m@th\rangle$}
\makeatother
\begin{document}
\DocInput{tikz-flowchart.dtx}
\end{document}
%</driver>
% \fi
%
% \CheckSum{0}
%
% \CharacterTable
% {Upper-case \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
% Lower-case \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
% Digits \0\1\2\3\4\5\6\7\8\9
% Exclamation \! Double quote \" Hash (number) \#
% Dollar \$ Percent \% Ampersand \&
% Acute accent \' Left paren \( Right paren \)
% Asterisk \* Plus \+ Comma \,
% Minus \- Point \. Solidus \/
% Colon \: Semicolon \; Less than \<
% Equals \= Greater than \> Question mark \?
% Commercial at \@ Left bracket \[ Backslash \\
% Right bracket \] Circumflex \^ Underscore \_
% Grave accent \` Left brace \{ Vertical bar \|
% Right brace \} Tilde \~}
%
% \changes{v1.0.01}{2019/08/20}{chang .sty file to .dtx file}
%
% \GetFileInfo{tikz-flowchart.sty}
%
% \title{\thispkg{}---\tkz{}流程图绘制宏包\thanks{该文档是 \thispkg{}~\fileversion, dated~\filedate 的说明文档。}}
% \author{耿楠\thanks{https://github.com/registor/tikz-flowchart}\\ 西北农林科技大学信息工程学院计算机科学系}
% \date{\filedate}
% \thispagestyle{empty}
% \maketitle
%
% \begin{abstract}
% 这是一个使用\tkz{}绘制传统程序流程图的简单宏包，通过定义
% \Arg{proc}、\Arg{test}、\Arg{io}、\Arg{term}等\tkz{}的
% \cs{node}命令的样式选项实现。
% 该宏包核心代码摘录自\href{http://www.texample.net/tikz/examples/author/brent-longborough/}{Brent Longborough}设计的流程图绘制样例，
% 参考了\pkg{tikz-imagelabels}宏包的设计思路，提供了\cs{flowchartset}命令以设置绘制参数。
% \end{abstract}
%
% \tableofcontents
%
% \PrintChanges
%
% \StopEventually{}
%
% \section{宏包简介}
%
% 流程图是诸如手册、报告、论文等文档中经常用到的排版元素，\thispkg{}宏包的
% 目的是为在\LaTeX{}中使用\tkz{}绘制流程图提供方便。\autoref{fig:forloop}是使
% 用该宏包绘制|for|循环结构流程图的一个简单示例。
%
% \begin{figure}[!htp]
% \centering
% \begin{tikzpicture}
% \node [proc] (p1) {表达式1};
% \node [test, join] (t1) {表达式2?};
% \node [proc] (p2) {循环体};
% \node [proc, join] (p3) {表达式3};
%
% \node [coord, above = 0.5 of p1] (c1) {};
% \node [coord] (c2) at ($(p1)!0.35!(t1)$) {};
% \node [coord, below = 0.25 of p3] (c3) {};
% \node [coord, below = 0.2 of c3] (c4) {};
% \node [coord, below = 0.5 of c4] (c5) {};
% \node [coord, right = 0.5 of t1] (c6) {};
% \node [coord, left = 0.5 of t1] (ct) {};
% \node [coord] (c7) at (c3 -| ct) {};
%
% \path (t1.south) -- node [near start, right] {$Y$} (p2.north);
% \draw [norm] (t1.south) -- (p2.north);
% \path (t1.east) -- node [near start, above] {$N$} (c6);
% \draw [norm] (t1.east) -- (c6) |- (c4) -- (c5);
%
% \draw [norm] (c1) -- (p1);
% \draw [norm] (p3.south) |- (c7) |- (c2);
% \end{tikzpicture}
% \caption{for循环流程图}
% \label{fig:forloop}
% \end{figure}
%
% \autoref{fig:forloop}由如下代码绘制:
% \begin{sourceverb}
% \begin{tikzpicture}
% % 布置结点
% \node [proc] (p1) {表达式1};
% \node [test, join] (t1) {表达式2?};
% \node [proc] (p2) {循环体};
% \node [proc, join] (p3) {表达式3};
% % 布置用于连接的坐标结点。
% \node [coord, above = 0.5 of p1] (c1) {};
% \node [coord] (c2) at ($(p1)!0.35!(t1)$) {};
% \node [coord, below = 0.25 of p3] (c3) {};
% \node [coord, below = 0.2 of c3] (c4) {};
% \node [coord, below = 0.5 of c4] (c5) {};
% \node [coord, right = 0.5 of t1] (c6) {};
% \node [coord, left = 0.5 of t1] (ct) {};
% \node [coord] (c7) at (c3 -| ct) {};
% % 判断框连线，每次绘制时，先绘制一个带有一个固定
% % 位置标注的路径(path)，然后再绘制箭头本身(arrow)。
% \path (t1.south) -- node [near start, right] {$Y$} (p2.north);
% \draw [norm] (t1.south) -- (p2.north);
% \path (t1.east) -- node [near start, above] {$N$} (c6);
% \draw [norm] (t1.east) -- (c6) |- (c4) -- (c5);
% % 其它连线
% \draw [norm] (c1) -- (p1);
% \draw [norm] (p3.south) |- (c7) |- (c2);
% \end{tikzpicture}
% \end{sourceverb}
%
% \note{所有绘图代码都需在\env{tikzpicture}环境中完成。}
% \section{使用方法}
% \subsection{载入宏包}
% \DescribeOption[\thispkg{}]{debug}
% 在导言区使用：\cs{usepackage}\oarg{debug}\marg{\thispkg{}}命令
% 载入宏包。如果带有\oarg{debug}参数，则可以绘制用于调试的流程线转角点
% 标记，否则，则不绘制该标记，\autoref{fig:forloopcmark}是带有
% \oarg{debug}参数时的绘制结果。
%
% \begin{figure}[!htp]
% \centering
% \begin{tikzpicture}
% \node [proc] (p1) {表达式1};
% \node [test, join] (t1) {表达式2?};
% \node [proc] (p2) {循环体};
% \node [proc, join] (p3) {表达式3};
%
% \node [coord, above = 0.5 of p1] (c1) {}; \cmark{1}
% \node [coord] (c2) at ($(p1)!0.35!(t1)$) {}; \cmark{2}
% \node [coord, below = 0.25 of p3] (c3) {}; \cmark{3}
% \node [coord, below = 0.2 of c3] (c4) {}; \cmark{4}
% \node [coord, below = 0.5 of c4] (c5) {}; \cmark{5}
% \node [coord, right = 0.5 of t1] (c6) {}; \cmark{6}
% \node [coord, left = 0.5 of t1] (ct) {}; \cmark{t}
% \node [coord] (c7) at (c3 -| ct) {}; \cmark{7}
%
% \path (t1.south) -- node [near start, right] {$Y$} (p2.north);
% \draw [norm] (t1.south) -- (p2.north);
% \path (t1.east) -- node [near start, above] {$N$} (c6);
% \draw [norm] (t1.east) -- (c6) |- (c4) -- (c5);
%
% \draw [norm] (c1) -- (p1);
% \draw [norm] (p3.south) |- (c7) |- (c2);
% \end{tikzpicture}
% \caption{for循环流程图}
% \label{fig:forloopcmark}
% \end{figure}
%
% \subsection{流程图绘制样式}
% \thispkg{}宏包定义了在\tkz{}中绘制流程图的绘图样式参数，以简化绘图过程。
%
% \begin{description}
% \ItemDescribeArgument[\cs{node}]{proc}\cs{node}命令绘制顺序执行框
% 的样式，如：\tikz{\node[proc]{\scriptsize 交换两个整数}}
% \ItemDescribeArgument[\cs{node}]{test}\cs{node}命令绘制判断框的样
% 式，如：\tikz{\node[test, minimum height=1ex]{\scriptsize $a > b$?}}
% \ItemDescribeArgument[\cs{node}]{io}\cs{node}命令绘制输入/输出框
% 的样式，如：\tikz{\node[io]{\scriptsize 输入两个整数}}
% \ItemDescribeArgument[\cs{node}]{term}\cs{node}命令绘制开始/结束
% 框的样式，如：\tikz{\node[term]{\scriptsize 开始}}
% \ItemDescribeArgument[\cs{node}]{it}\cs{node}命令绘制斜体标注
% 的样式，如：\tikz{\node[it]{\scriptsize 这里需要特别注意}}
% \ItemDescribeArgument[\cs{node}]{connector}\cs{node}命令绘制流程
% 图链接点的样式，如：\tikz{\node[connector]{\scriptsize 1}}
% \ItemDescribeArgument[\cs{node}]{coord}\cs{node}命令布置转角结点
% 的样式，如：\tikz{\node[coord](c1){};\cmark{1}}
% \ItemDescribeArgument[\cs{draw}]{connect}\cs{draw}命令绘制不相交
% 的两个交汇路径的样式，如：\tikz{\node[coord](c1)at(0,0){};
% \node[coord](c2)at(0.3,0){};\node[coord](c3)at(0.15,-0.15){};
% \node[coord](c4)at(0.15,0.15){};\node[coord] (c5) at (c4 |- c1)
% {};\draw[lnorm](c3)--(c4);
% \draw[lnorm, connect=(c1) to (c2) over (c5) by 1.5pt] -- (c2);}
% \ItemDescribeArgument[\cs{draw}]{lnorm}\cs{draw}命令绘制指定颜色
% 无箭头连线的样式，如：\tikz{\draw[lnorm](0,0)--(0.5,0)}
% \ItemDescribeArgument[\cs{draw}]{lfree}\cs{draw}命令绘制指定颜色
% 无箭头连线的样式，如：\tikz{\draw[lfree](0,0)--(0.5,0)}
% \ItemDescribeArgument[\cs{draw}]{lcong}\cs{draw}命令绘制指定颜色
% 无箭头连线的样式，如：\tikz{\draw[lcong](0,0)--(0.5,0)}
% \ItemDescribeArgument[\cs{draw}]{norm}\cs{draw}命令绘制指定颜色箭
% 头连线的样式，如：\tikz{\draw[norm](0,0)--(0.5,0)}
% \ItemDescribeArgument[\cs{draw}]{free}\cs{draw}命令绘制指定颜色箭
% 头连线的样式，如：\tikz{\draw[free](0,0)--(0.5,0)}
% \ItemDescribeArgument[\cs{draw}]{dotnorm}\cs{draw}命令绘制指定颜
% 色流程线实心交点的样式，如：\tikz{\draw[dotnorm](0,0) circle(1.5pt)}
% \ItemDescribeArgument[\cs{draw}]{dotfree}\cs{draw}命令绘制指定颜
% 色流程线实心交点的样式，如：\tikz{\draw[dotfree](0,0) circle(1.5pt)}
% \ItemDescribeArgument[\cs{draw}]{dotcong}\cs{draw}命令绘制指定颜
% 色流程线实心交点的样式，如：\tikz{\draw[dotcong](0,0) circle(1.5pt)}
% \ItemDescribeArgument[\cs{draw}]{cdotnorm}\cs{draw}命令绘制指定颜
% 色流程线空心交点的样式，如：\tikz{\draw[cdotnorm](0,0) circle(1.5pt)}
% \ItemDescribeArgument[\cs{draw}]{cdotfree}\cs{draw}命令绘制指定颜
% 色流程线空心交点的样式，如：\tikz{\draw[cdotfree](0,0) circle(1.5pt)}
% \ItemDescribeArgument[\cs{draw}]{cdotcong}\cs{draw}命令绘制指定颜
% 色流程线空心交点的样式，如：\tikz{\draw[cdotcong](0,0) circle(1.5pt)}
% \end{description}
%
% \subsection{样式参数设置命令}
% \DescribeMacro{\flowchartset}
% \thispkg{}宏包定义了\cs{flowchartset}命令，该命令用于设置流程图各元
% 素的绘制属性，详情见如下代码注释。
%
% \begin{sourceverb}[xleftmargin=0em]
% \flowchartset{
% free color = green, % 自由连线颜色(默认取green)
% norm color = blue, % 常规连线颜色(默认取blue)
% cong color = red, % 关联连线颜色(默认取red)
% proc fill color = white, % 顺序处理框填充颜色(默认取白色)
% test fill color = white, % 判断框填充颜色(默认取白色)
% io fill color = white, % 输入/输出框填充颜色(默认取白色)
% term fill color = white, % 开始/结束框填充颜色(默认取白色)
% proc text width = 8em, % 顺序处理框宽度(默认取8em)
% test text width = 5em, % 判断框宽度(默认取5em)
% io text width = 6em, % 输入/输出框宽度(默认取6em)
% term text width = 3em, % 开始/结束宽度(默认取3em)
% chain direction = below, % 结点自动布置方向(默认取below)
% minimum node distance = 6mm, % 最小结点间距(默认取6mm)
% maximum node distance = 60mm, % 最大结点间距(默认取60mm)
% border line width = \pgflinewidth, % 流程框边框宽度(默认取当前线条宽度)
% flow line width = \pgflinewidth, % 流程线线条宽度(默认取当前线条宽度)
% stealth length = 1.5mm, % 箭头长度(默认取1.5mm)
% stealth width = 1.0mm, % 箭头宽度(默认取1.0mm)
% }
% \end{sourceverb}
%
% 这些参数设置方式与常规的\tkz{}参数设置类似，即可以多个参数一起设置，
% 也可以分开单独设置。\cs{flowchartset}命令可以在导言区进行全局设置，
% 也可以在需要的位置进行局部设置。
% \section{流程图绘制步骤}
% \subsection{布置流程框结点}
% 使用类似``|\node [proc](p1){表达式1};|''命令，采用\thispkg{}
% 定义的``|proc|''、``|test|''、``|io|''或``|term|''样式参数布置需要的流程框结点。
%
%
% 在布置结点时，如果前一个结点不是``|test|''样式，则可以使用
% ``|join|''参数自动与前一个结点建立连接，如
% ``|\node [proc, join] (p3) {表达式3};|''，并同时绘制对应流程线。
%
% 另外，可根据需要对结点进行命名(如``|p1|''、
% ``|t1|''等)，以便引用该结点。
%
% \subsection{布置坐标点}
% 使用类似``|\node[coord,above=0.5 of p1](c1){};\cmark{1}|''
% 命令，用``|coord|''样式参数布置其它坐标点
% (主要用于流程线的转接)。同时，可以使用``\cs{cmark}''命令为该点作标
% 记，在带\oarg{debug}可选参数引入
% 宏包时，则绘制标记点，若无\oarg{debug}参数，则不绘制标记点。
%
% \subsection{绘制流程线}
% 首先使用类似``|\path(t1.south)--node[near start,right]{$Y$}(p2.north);|''
% 的路径命令绘制流程线的标注文字。
%
% 然后使用类似``\verb!\draw[norm](t1.east)--(c6)|-(c4)--(c5);!''
% 绘制命令绘制带有箭头的流程线。
%
% 可以使用``|lnorm|''、``|lfree|''或
% ``|lcong|''绘制指定颜色的无箭头流程线，用``|norm|''、
% ``|free|''或``|cong|''绘制指定颜色的有箭头流程线。
%
% \note[建议]{先绘制南北方向流程线，再绘制东西方向流程线}。
%
% 可以使用``|dotnorm|''、``|dotfree|''和
% ``|dotcong|''样式绘制流程线实心交点，用``|cdotnorm|''、
% ``|cdotfree|''或``|cdotcong|''样式绘制流程线空心交点。
%
% 对于不相交的流程线，可以用``|connect|''样式进行绘制。
%
% \subsection{绘制其它图形}
% 在使用\cs{node}、\cs{path}、\cs{draw}等命令时，可以同时使用任何
% 合法的\tkz{}参数，同时，也可以使用任何合法\tkz{}命令绘制需要的其它图形。
%
% \section{改变绘图属性}
%
% \subsection{改变流程线颜色}
% 通过在导言区使用\cs{flowchartset}命令可以全局设置需要的绘图属性，
% 如：
% \begin{sourceverb}
% \usepackage{tikz-flowchart}
% \flowchartset{
% norm color = black, % 将常规连线颜色设置为black
% }
% ......
% \end{sourceverb}
%
% \note{可以多次使用\cs{flowchartset}命令，每次可仅指定需要的参数。}
%
% 例如，仅指定``\verb|norm|''类型的颜色为``\verb|black|''，得到
% \autoref{fig:forloopblack}所示的黑色流程线。
%
% \flowchartset{
% norm color = black,
% }
%
% \begin{figure}[!htp]
% \centering
% \begin{tikzpicture}
% \node [proc] (p1) {表达式1};
% \node [test, join] (t1) {表达式2?};
% \node [proc] (p2) {循环体};
% \node [proc, join] (p3) {表达式3};
%
% \node [coord, above = 0.5 of p1] (c1) {};
% \node [coord] (c2) at ($(p1)!0.35!(t1)$) {};
% \node [coord, below = 0.25 of p3] (c3) {};
% \node [coord, below = 0.2 of c3] (c4) {};
% \node [coord, below = 0.5 of c4] (c5) {};
% \node [coord, right = 0.5 of t1] (c6) {};
% \node [coord, left = 0.5 of t1] (ct) {};
% \node [coord] (c7) at (c3 -| ct) {};
%
% \path (t1.south) -- node [near start, right] {$Y$} (p2.north);
% \draw [norm] (t1.south) -- (p2.north);
% \path (t1.east) -- node [near start, above] {$N$} (c6);
% \draw [norm] (t1.east) -- (c6) |- (c4) -- (c5);
%
% \draw [norm] (c1) -- (p1);
% \draw [norm] (p3.south) |- (c7) |- (c2);
% \end{tikzpicture}
% \caption{黑色流程线流程图}
% \label{fig:forloopblack}
% \end{figure}
%
% \subsection{改变流程框填充色和宽度}
% 也可以在需要时用\cs{flowchartset}命令进行绘图属性的局部设置。
% 如，可以用如下代码局部改变各类流程框的填充颜色和文字宽度：
% \begin{sourceverb}
% \flowchartset{
% proc fill color = orange!10,
% test fill color = green!30,
% io fill color = blue!30,
% term fill color = red!30,
% proc text width = 6em,
% test text width = 5em,
% }
% \begin{tikzpicture}
% ...
% \end{tikzpicture}
% \end{sourceverb}
%
% 绘制结果如\autoref{fig:forloopcolork}所示。
%
% \flowchartset{
% proc fill color = orange!10,
% test fill color = green!30,
% io fill color = blue!30,
% term fill color = red!30,
% proc text width = 6em,
% test text width = 5em,
% }
% \begin{figure}[!htp]
% \centering
% \begin{tikzpicture}
% \node [proc] (p1) {表达式1};
% \node [test, join] (t1) {表达式2?};
% \node [proc] (p2) {循环体};
% \node [proc, join] (p3) {表达式3};
%
% \node [coord, above = 0.5 of p1] (c1) {};
% \node [coord] (c2) at ($(p1)!0.35!(t1)$) {};
% \node [coord, below = 0.25 of p3] (c3) {};
% \node [coord, below = 0.2 of c3] (c4) {};
% \node [coord, below = 0.5 of c4] (c5) {};
% \node [coord, right = 0.5 of t1] (c6) {};
% \node [coord, left = 0.5 of t1] (ct) {};
% \node [coord] (c7) at (c3 -| ct) {};
%
% \path (t1.south) -- node [near start, right] {$Y$} (p2.north);
% \draw [norm] (t1.south) -- (p2.north);
% \path (t1.east) -- node [near start, above] {$N$} (c6);
% \draw [norm] (t1.east) -- (c6) |- (c4) -- (c5);
%
% \draw [norm] (c1) -- (p1);
% \draw [norm] (p3.south) |- (c7) |- (c2);
% \end{tikzpicture}
% \caption{彩色流程图}
% \label{fig:forloopcolork}
% \end{figure}
%
% \subsection{使用\env{tikzpicture}环境的绘图参数}
% 可以使用任意合法的\env{tikzpicture}环境参数，如，可使用
% \env{tikzpicture}环境的参数进行流程图缩放及字号设置：
%
% \begin{sourceverb}
% \begin{tikzpicture}[font=\scriptsize, scale=0.5,
% every node/.append style = {transform shape}]
% ...
% \end{tikzpicture}
% \end{sourceverb}
%
% 绘制结果如\autoref{fig:forloopscaled}所示。
%
% \begin{figure}[!htp]
% \centering
% \begin{tikzpicture}[font=\scriptsize, scale=0.5,
% every node/.append style = {transform shape}]
% \node [proc] (p1) {表达式1};
% \node [test, join] (t1) {表达式2?};
% \node [proc] (p2) {循环体};
% \node [proc, join] (p3) {表达式3};
%
% \node [coord, above = 0.5 of p1] (c1) {};
% \node [coord] (c2) at ($(p1)!0.35!(t1)$) {};
% \node [coord, below = 0.25 of p3] (c3) {};
% \node [coord, below = 0.2 of c3] (c4) {};
% \node [coord, below = 0.5 of c4] (c5) {};
% \node [coord, right = 0.5 of t1] (c6) {};
% \node [coord, left = 0.5 of t1] (ct) {};
% \node [coord] (c7) at (c3 -| ct) {};
%
% \path (t1.south) -- node [near start, right] {$Y$} (p2.north);
% \draw [norm] (t1.south) -- (p2.north);
% \path (t1.east) -- node [near start, above] {$N$} (c6);
% \draw [norm] (t1.east) -- (c6) |- (c4) -- (c5);
%
% \draw [norm] (c1) -- (p1);
% \draw [norm] (p3.south) |- (c7) |- (c2);
% \end{tikzpicture}
% \caption{流程图缩放}
% \label{fig:forloopscaled}
% \end{figure}
%
% \subsection{使用绘图命令参数}
% 可以使用任意\cs{node}、\cs{draw}等绘图命令的合法参数调整当前绘图属性，如：
%
% \begin{sourcedisplay}
% ...\\
% \cs{node}[test, join, \textcolor{red}{text width= 5em}](t1) \{表达式2?\};\\
% ...\\
% \cs{draw}[norm, \textcolor{red}{dash dot}](t1.east) -- (c6) \verb!|!- (c4) -- (c5);\\
% ...\\
% \cs{draw}[norm, \textcolor{red}{dashed}](p3.south) \verb!|!- (c7) \verb!|!- (c2);\\
% ...\\
% \end{sourcedisplay}
%
% 绘制结果如\autoref{fig:forloopdasheline}所示。
%
% \begin{figure}[!htp]
% \centering
% \begin{tikzpicture}
% \node [proc] (p1) {表达式1};
% \node [test, join, text width= 5em] (t1) {表达式2?};
% \node [proc] (p2) {循环体};
% \node [proc, join] (p3) {表达式3};
%
% \node [coord, above = 0.5 of p1] (c1) {};
% \node [coord] (c2) at ($(p1)!0.35!(t1)$) {};
% \node [coord, below = 0.25 of p3] (c3) {};
% \node [coord, below = 0.2 of c3] (c4) {};
% \node [coord, below = 0.5 of c4] (c5) {};
% \node [coord, right = 0.5 of t1] (c6) {};
% \node [coord, left = 0.5 of t1] (ct) {};
% \node [coord] (c7) at (c3 -| ct) {};
%
% \path (t1.south) -- node [near start, right] {$Y$} (p2.north);
% \draw [norm] (t1.south) -- (p2.north);
% \path (t1.east) -- node [near start, above] {$N$} (c6);
% \draw [norm, dash dot] (t1.east) -- (c6) |- (c4) -- (c5);
%
% \draw [norm] (c1) -- (p1);
% \draw [norm, dashed] (p3.south) |- (c7) |- (c2);
% \end{tikzpicture}
% \caption{使用绘图命令参数}
% \label{fig:forloopdasheline}
% \end{figure}
%
% \subsection{流程图示例}
% \subsubsection{冒泡排序流程图}
% 如下代码绘制如\autoref{fig:bubllesort}所示的冒泡排序流程图。
%
% \begin{sourceverb}[xleftmargin=0em]
% \begin{figure}[!htp]
% \centering
% \begin{tikzpicture}
% % 布置结点单元
% \node [term] (st) {Begin};
% \node [proc, text width = 6em, join] (p1) {\verb|int i, j|\\
% \verb|int counter|};
% \node [proc, join] (p2) {\verb|i = 0|\\\verb|counter = 0|};
% \node [test, join] (t1) {\verb|i < n - 1|};
% \node [proc] (p3) {\verb|j = 0|};
% \node [test, join] (t2) {\verb|j < n - 1|};
% \node [test, text width = 6em] (t3) {\verb|a[j] > a[j + 1]|};
% \node [proc, text width = 8em] (p4) {\verb|Swap(a[j], a[j + 1])|};
% \node [proc, join] (p5) {\verb|counter++|\\\verb|j++|};
% \node [proc] (p6) {\verb|i++|};
% \node [proc, text width = 6em] (p7) {\verb|return counter|};
% \node [term, join] (end) {End};
%
% % 布置用于连接的坐标结点，同时为其布置调试标记点。
% \node [coord] (c1) at ($(p2.south)!0.5!(t1.north)$) {};
% \node [coord] (c2) at ($(p3.south)!0.5!(t2.north)$) {};
% \node [coord] (c3) at ($(p4.south)!0.5!(p5.north)$) {};
% \node [coord, below = 0.2 of p5] (c4) {};
% \node [coord, above = 0.25 of p6] (c5) {};
% \node [coord, below = 0.2 of p6] (c6) {};
% \node [coord, above = 0.25 of p7] (c7) {};
% \node [coord, right = 2.0 of t1] (c8) {};
% \node [coord, right = 1.5 of t2] (c9) {};
% \node [coord, right = 0.4 of t3] (c10) {};
% \node [coord, left = 1.5 of t2] (ct1) {};
% \node [coord, left = 2.0 of t2] (ct2) {};
% \node [coord] (c11) at (c6 -| ct2) {};
% \node [coord] (c12) at (c4 -| ct1) {};
%
% % 判断框连线，每次绘制时，先绘制一个带有一个固定
% % 位置标注的路径(path)，然后再绘制箭头本身(arrow)。
% \path (t1.south) -- node [near start, right] {$Y$} (p3.north);
% \draw [norm] (t1.south) -- (p3.north);
% \path (t1.east) -- node [near start, above] {$N$} (c8);
% \draw [norm] (t1.east) -- (c8) |- (c7) -- (p7.north);
%
% \path (t2.south) -- node [near start, right] {$Y$} (t3.north);
% \draw [norm] (t2.south) -- (t3.north);
% \path (t2.east) -- node [near start, above] {$N$} (c9);
% \draw [norm] (t2.east) -- (c9) |- (c5) -- (p6.north);
%
% \path (t3.south) -- node [near start, right] {$Y$} (p4.north);
% \draw [norm] (t3.south) -- (p4.north);
% \path (t3.east) -- node [near start, above] {$N$} (c10);
% \draw [norm] (t3.east) -- (c10) |- (c3);
%
% % 其它连线
% \draw [norm](p5.south) |- (c12) |- (c2);
% \draw [norm](p6.south) |- (c11) |- (c1);
% \end{tikzpicture}
% \caption{冒泡排序流程图}
% \label{fig:bubllesort}
% \end{figure}
% \end{sourceverb}
%
% \flowchartset{
% free color = green,
% norm color = blue,
% cong color = red,
% proc fill color = orange!10,
% test fill color = green!30,
% io fill color = blue!30,
% term fill color = red!30,
% proc text width = 10em,
% test text width = 8em,
% }
%
% \begin{figure}[!htp]
% \centering
% \begin{tikzpicture}
% % 布置结点单元
% \node [term] (st) {Begin};
% \node [proc, join] (p1) {|int i, j|\\|int counter|};
% \node [proc, join] (p2) {|i = 0|\\|counter = 0|};
% \node [test, join] (t1) {|i < n - 1|};
% \node [proc] (p3) {|j = 0|};
% \node [test, join] (t2) {|j < n - 1|};
% \node [test] (t3) {|a[j] > a[j + 1]|};
% \node [proc] (p4) {|Swap(a[j], a[j + 1])|};
% \node [proc, join] (p5) {|counter++|\\|j++|};
% \node [proc] (p6) {|i++|};
% \node [proc] (p7) {|return counter|};
% \node [term, join] (end) {End};
%
% % 布置用于连接的坐标结点，同时为其布置调试标记点。
% \node [coord] (c1) at ($(p2.south)!0.5!(t1.north)$) {};
% \node [coord] (c2) at ($(p3.south)!0.5!(t2.north)$) {};
% \node [coord] (c3) at ($(p4.south)!0.5!(p5.north)$) {};
% \node [coord, below = 0.2 of p5] (c4) {};
% \node [coord, above = 0.25 of p6] (c5) {};
% \node [coord, below = 0.2 of p6] (c6) {};
% \node [coord, above = 0.25 of p7] (c7) {};
% \node [coord, right = 2.0 of t1] (c8) {};
% \node [coord, right = 1.5 of t2] (c9) {};
% \node [coord, right = 0.4 of t3] (c10) {};
% \node [coord, left = 1.5 of t2] (ct1) {};
% \node [coord, left = 2.0 of t2] (ct2) {};
% \node [coord] (c11) at (c6 -| ct2) {};
% \node [coord] (c12) at (c4 -| ct1) {};
%
% % 判断框连线，每次绘制时，先绘制一个带有一个固定
% % 位置标注的路径(path)，然后再绘制箭头本身(arrow)。
% \path (t1.south) -- node [near start, right] {$Y$} (p3.north);
% \draw [norm] (t1.south) -- (p3.north);
% \path (t1.east) -- node [near start, above] {$N$} (c8);
% \draw [norm] (t1.east) -- (c8) |- (c7) -- (p7.north);
%
% \path (t2.south) -- node [near start, right] {$Y$} (t3.north);
% \draw [norm] (t2.south) -- (t3.north);
% \path (t2.east) -- node [near start, above] {$N$} (c9);
% \draw [norm] (t2.east) -- (c9) |- (c5) -- (p6.north);
%
% \path (t3.south) -- node [near start, right] {$Y$} (p4.north);
% \draw [norm] (t3.south) -- (p4.north);
% \path (t3.east) -- node [near start, above] {$N$} (c10);
% \draw [norm] (t3.east) -- (c10) |- (c3);
%
% % 其它连线
% \draw [norm](p5.south) |- (c12) |- (c2);
% \draw [norm](p6.south) |- (c11) |- (c1);
% \end{tikzpicture}
% \caption{冒泡排序流程图}
% \label{fig:bubllesort}
% \end{figure}
%
% \newpage
% \subsubsection{素数判定流程图}
% 如下代码绘制如\autoref{fig:primejudge}所示的素数判定流程图。
%
% \begin{sourceverb}[xleftmargin=0em]
% \begin{figure}[!htp]
% \centering
% \begin{tikzpicture}
% % 布置结点单元
% \node [term] (st) {开始};
% \node [proc, join] (p1) {\verb|int divisor|};
% \node [test, join] (t1) {\verb|n <= 1|};
% \node [proc] (p2) {\verb|divisor = 2|};
% \node [test, join] (t2) {\verb|divisor * divisor <= n|};
% \node [test] (t3) {\verb|n % divisor == 0|};
% \node [proc] (p3) {\verb|divisor++|};
% \node [term, below = 1.6 of p3] (end) {结束};
% \node [proc, left = 4.8 of t2] (p4) {\verb|return 0|};
% \node [proc, right = 3.5 of p3] (p5) {\verb|return 0|};
% \node [proc, right = 5.8 of t3] (p6) {\verb|return 1|};
%
% % 布置用于连接的坐标结点，同时为其布置调试标记点。
% \node [coord] (c1) at ($(p2.south)!0.5!(t2.north)$) {};
% \node [coord, below = 0.25 of p3] (c2) {};
% \node [coord, above = 0.5 of end] (c3) {};
% \node [coord, left = 0.5 of t2] (ct) {};
% \node [coord] (c4) at (c3 -| p5) {};
% \node [coord] (c5) at (c2 -| ct) {};
%
% % 判断框连线，每次绘制时，先绘制一个带有一个固定
% % 位置标注的路径(path)，然后再绘制箭头本身(arrow)。
% \path (t1.south) -- node [near start, right] {$N$} (p2.north);
% \draw [norm] (t1.south) -- (p2.north);
% \path (t1.west) -| node [near start, above] {$Y$} (p4.north);
% \draw [norm] (t1.west) -| (p4.north);
%
% \path (t2.south) -- node [near start, right] {$Y$} (t3.north);
% \draw [norm] (t2.south) -- (t3.north);
% \path (t2.east) -| node [near start, above] {$N$} (p6.north);
% \draw [norm] (t2.east) -| (p6.north);
%
% \path (t3.south) -- node [near start, right] {$N$} (p3.north);
% \draw [norm] (t3.south) -- (p3.north);
% \path (t3.east) -| node [near start, above] {$Y$} (p5.north);
% \draw [norm] (t3.east) -| (p5.north);
%
% % 其它连线
% \draw [norm](p3.south) |- (c5) |- (c1);
% \draw [norm](p4.south) |- (c3);
% \draw [norm](p4.south) |- (c3) -- (end);
% \draw [norm](p5.south) -- (c4);
% \draw [norm](p6.south) |- (c3);
% \draw [norm](p6.south) |- (c3) -- (end);
% \end{tikzpicture}
% \caption{素数判定流程图}
% \label{fig:primejudge}
% \end{figure}
% \end{sourceverb}
%
% \flowchartset{
% proc fill color = orange!10,
% test fill color = green!30,
% io fill color = blue!30,
% term fill color = red!30,
% proc text width = 6em,
% test text width = 10em,
% }
%
% \begin{figure}[!htp]
% \centering
% \begin{tikzpicture}[scale=0.5]
% % 布置结点单元
% \node [term] (st) {开始};
% \node [proc, join] (p1) {|int divisor|};
% \node [test, join] (t1) {b|n <= 1|};
% \node [proc] (p2) {|divisor = 2|};
% \node [test, join] (t2) {|divisor * divisor <= n|};
% \node [test] (t3) {|n % divisor == 0|};
% \node [proc] (p3) {|divisor++|};
% \node [term, below = 1.6 of p3] (end) {结束};
% \node [proc, left = 4.8 of t2] (p4) {|return 0|};
% \node [proc, right = 3.5 of p3] (p5) {|return 0|};
% \node [proc, right = 5.8 of t3] (p6) {|return 1|};
%
% % 布置用于连接的坐标结点，同时为其布置调试标记点。
% \node [coord] (c1) at ($(p2.south)!0.5!(t2.north)$) {};
% \node [coord, below = 0.25 of p3] (c2) {};
% \node [coord, above = 0.5 of end] (c3) {};
% \node [coord, left = 0.5 of t2] (ct) {};
% \node [coord] (c4) at (c3 -| p5) {};
% \node [coord] (c5) at (c2 -| ct) {};
%
% % 判断框连线，每次绘制时，先绘制一个带有一个固定
% % 位置标注的路径(path)，然后再绘制箭头本身(arrow)。
% \path (t1.south) -- node [near start, right] {$N$} (p2.north);
% \draw [norm] (t1.south) -- (p2.north);
% \path (t1.west) -| node [near start, above] {$Y$} (p4.north);
% \draw [norm] (t1.west) -| (p4.north);
%
% \path (t2.south) -- node [near start, right] {$Y$} (t3.north);
% \draw [norm] (t2.south) -- (t3.north);
% \path (t2.east) -| node [near start, above] {$N$} (p6.north);
% \draw [norm] (t2.east) -| (p6.north);
%
% \path (t3.south) -- node [near start, right] {$N$} (p3.north);
% \draw [norm] (t3.south) -- (p3.north);
% \path (t3.east) -| node [near start, above] {$Y$} (p5.north);
% \draw [norm] (t3.east) -| (p5.north);
%
% % 其它连线
% \draw [norm](p3.south) |- (c5) |- (c1);
% \draw [norm](p4.south) |- (c3);
% \draw [norm](p4.south) |- (c3) -- (end);
% \draw [norm](p5.south) -- (c4);
% \draw [norm](p6.south) |- (c3);
% \draw [norm](p6.south) |- (c3) -- (end);
% \end{tikzpicture}
% \caption{素数判定流程图}
% \label{fig:primejudge}
% \end{figure}
%
% \newpage
% \subsubsection{求最大公约数流程图}
% 如下代码绘制如\autoref{fig:getgcd}所示的求最大公约数流程图。
%
% \begin{sourceverb}[xleftmargin=0em]
% \begin{figure}[!htp]
% \centering
% \begin{tikzpicture}
% % 布置结点单元
% % 用异或交换两个整数
% \node [term] (st) {Begin};
% \node [proc, join] (p1) {\verb|int r = 0|};
% \node [test, join] (t1) {\verb|m < n|};
% \node [proc] (p2) {\verb|m ^= n|\\\verb|n ^= m|\\\verb|m ^= n|};
% \node [test, join] (t2) {\verb|n != 0|};
% \node [proc] (p3) {\verb|r = m % n|\\\verb|m = n|\\\verb|n = r|};
% \node [proc] (p4) {\verb|return m|};
% \node [term, join] (end) {End};
%
% % 布置用于连接的坐标结点，同时为其布置调试标记点。
% \node [coord] (c1) at ($(p2.south)!0.5!(t2.north)$) {};
% \node [coord, below = 0.25 of p3] (c2) {};
% \node [coord, above = 0.25 of p4] (c3) {};
% \node [coord, right = 1.0 of t1] (c4) {};
% \node [coord, right = 1.0 of t2] (c5) {};
% \node [coord, left = 1.0 of t2] (ct) {};
% \node [coord] (c6) at (ct |- c2) {};
%
% % 判断框连线，每次绘制时，先绘制一个带有一个固定
% % 位置标注的路径(path)，然后再绘制箭头本身(arrow)。
% \path (t1.south) -- node [near start, right] {$Y$} (p2.north);
% \draw [norm] (t1.south) -- (p2.north);
% \path (t1.east) -- node [near start, above] {$N$} (c4);
% \draw [norm] (t1.east) -- (c4) |- (c1);
% \path (t2.south) -- node [near start, right] {$Y$} (p3.north);
% \draw [norm] (t2.south) -- (p3.north);
% \path (t2.east) -- node [near start, above] {$N$} (c5);
% \draw [norm] (t2.east) -- (c5) |- (c3) -- (p4.north);
%
% % 其它连线
% \draw [norm](p3.south) |- (c6) |- (c1);
% \end{tikzpicture}
% \caption{求最大公约数}
% \label{fig:getgcd}
% \end{figure}
% \end{sourceverb}
%
% \flowchartset{
% proc fill color = orange!10,
% test fill color = green!30,
% io fill color = blue!30,
% term fill color = red!30,
% proc text width = 5em,
% test text width = 5em,
% }
%
% \begin{figure}[!htp]
% \centering
% \begin{tikzpicture}
% % 布置结点单元
% % 用异或交换两个整数
% \node [term] (st) {Begin};
% \node [proc, join] (p1) {|int r = 0|};
% \node [test, join] (t1) {|m < n|};
% \node [proc] (p2) {|m ^= n|\\|n ^= m|\\|m ^= n|};
% \node [test, join] (t2) {|n != 0|};
% \node [proc] (p3) {|r = m % n|\\|m = n|\\|n = r|};
% \node [proc] (p4) {|return m|};
% \node [term, join] (end) {End};
%
% % 布置用于连接的坐标结点，同时为其布置调试标记点。
% \node [coord] (c1) at ($(p2.south)!0.5!(t2.north)$) {};
% \node [coord, below = 0.25 of p3] (c2) {};
% \node [coord, above = 0.25 of p4] (c3) {};
% \node [coord, right = 1.0 of t1] (c4) {};
% \node [coord, right = 1.0 of t2] (c5) {};
% \node [coord, left = 1.0 of t2] (ct) {};
% \node [coord] (c6) at (ct |- c2) {};
%
% % 判断框连线，每次绘制时，先绘制一个带有一个固定
% % 位置标注的路径(path)，然后再绘制箭头本身(arrow)。
% \path (t1.south) -- node [near start, right] {$Y$} (p2.north);
% \draw [norm] (t1.south) -- (p2.north);
% \path (t1.east) -- node [near start, above] {$N$} (c4);
% \draw [norm] (t1.east) -- (c4) |- (c1);
% \path (t2.south) -- node [near start, right] {$Y$} (p3.north);
% \draw [norm] (t2.south) -- (p3.north);
% \path (t2.east) -- node [near start, above] {$N$} (c5);
% \draw [norm] (t2.east) -- (c5) |- (c3) -- (p4.north);
%
% % 其它连线
% \draw [norm](p3.south) |- (c6) |- (c1);
% \end{tikzpicture}
% \caption{求最大公约数}
% \label{fig:getgcd}
% \end{figure}
%
% \newpage
% \section{代码实现}
% 该宏包仅需要载入|tikz|和|xifthen|宏包，如果这些宏包没有载入，则自
% 动载入这些宏包。
% \begin{macrocode}
\RequirePackage{tikz}
\RequirePackage{xifthen}
%
% \end{macrocode}
% \subsection{宏包选项}
% 使用 \pkg{kvoptions} 来处理传给该宏包的参数。
% \begin{macrocode}
\RequirePackage{kvoptions}
\SetupKeyvalOptions{
family=flowchart,
prefix=flowchart@,
setkeys=\kvsetkeys
}
% \end{macrocode}
%
% 定义调试状态参数(布尔类型)。
% \begin{macrocode}
\DeclareBoolOption[false]{debug}
% \end{macrocode}
%
% 参数解析，获取定义的宏包参数。
% \begin{macrocode}
\DeclareDefaultOption{}
\kvsetkeys{flowchart}{}
\ProcessKeyvalOptions*
% \end{macrocode}
% 载入需要的\tkz{}宏包运行库。
% \begin{macrocode}
\usetikzlibrary{
arrows.meta, % 箭头形状
shapes.geometric, % 几何形状
chains, % 链式布局
calc, % 坐标计算
}
% \end{macrocode}
%
% \subsection{配置命令}
% 为|\flowchartset|命令定义一个|pgfkeys|族，所有配置参数(例如：
% \meta{norm color}等)都会存储在|/flowchart|PGF键中。这能够确保这些配
% 置参数不会覆盖别的同类参数。
% \begin{macrocode}
\pgfkeys{
/flowchart/.is family,
/flowchart/.search also={/tikz},
}
\def\flowchartset{\pgfqkeys{/flowchart}}
% \end{macrocode}
% 然后，定义存储这些参数值的宏命令。
% \begin{macrocode}
\flowchartset{
free color/.store in = \freecolor, % 自由连线颜色
norm color/.store in = \normcolor, % 常规连线颜色
cong color/.store in = \congcolor, % 关联连线颜色
proc fill color/.store in = \procfillcolor, % 顺序处理框填充颜色
test fill color/.store in = \testfillcolor, % 判断框填充颜色
io fill color/.store in = \iofillcolor, % 输入/输出框填充颜色
term fill color/.store in = \termfillcolor, % 开始/结束框填充颜色
proc text width/.store in = \proctxtwd, % 顺序处理框宽度
test text width/.store in = \testtxtwd, % 判断框宽度
io text width/.store in = \iotxtwd, % 输入/输出框宽度
term text width/.store in = \termtxtwd, % 开始/结束宽度
chain direction/.store in = \chaindir, % 结点自动布置方向
minimum node distance/.store in = \minnodedis, % 最小结点间距
maximum node distance/.store in = \maxnodedis, % 最大结点间距
border line width/.store in = \bdlinewd, % 各类流程框边框宽度
flow line width/.store in = \flowlinewd, % 各类流程线线条宽度
stealth length/.store in = \stealthlen, % 箭头长度
stealth width/.store in = \stealthwd, % 箭头宽度
}
% \end{macrocode}
%
% \subsection{默认参数值}
% 为各个参数设置默认值以确保预设的各个宏的值有效，这些值可以由用户单独
% 进行修改，修改后的值会覆盖参数默认值。
% \begin{macrocode}
\flowchartset{
free color = green, % 自由连线颜色(默认取green)
norm color = blue, % 常规连线颜色(默认取blue)
cong color = red, % 关联连线颜色(默认取red)
proc fill color = white, % 顺序处理框填充颜色(默认取白色)
test fill color = white, % 判断框填充颜色(默认取白色)
io fill color = white, % 输入/输出框填充颜色(默认取白色)
term fill color = white, % 开始/结束框填充颜色(默认取白色)
proc text width = 8em, % 顺序处理框宽度(默认取8em)
test text width = 5em, % 判断框宽度(默认取5em)
io text width = 6em, % 输入/输出框宽度(默认取6em)
term text width = 3em, % 开始/结束宽度(默认取3em)
chain direction = below, % 结点自动布置方向(默认取below)
minimum node distance = 6mm, % 最小结点间距(默认取6mm)
maximum node distance = 60mm, % 最大结点间距(默认取60mm)
border line width = \pgflinewidth, % 各类流程框边框宽度(默认取当前线条宽度)
flow line width = \pgflinewidth, % 各类流程线线条宽度(默认取当前线条宽度)
stealth length = 1.5mm, % 箭头长度(默认取1.5mm)
stealth width = 1.0mm, % 箭头宽度(默认取1.0mm)
}
% \end{macrocode}
%
% \subsection{样式定义}
% 以下是所有绘制流程图中需要的样式定义。
% \begin{macrocode}
\tikzset{
% \end{macrocode}
% 首先，定义结点布局方式：
% \begin{macrocode}
start chain = going \chaindir, % 结点自动布置方向(默认取below)
node distance = \minnodedis and \maxnodedis, % 结点间距
every join/.style = {norm}, % 默认自动连接线的连线样式
% \end{macrocode}
% 其次，定义基础绘图样式：
% \begin{macrocode}
% 流程框样式的基础样式
base/.style = {line width = \bdlinewd, % 边框线宽
draw, % 绘制边框
on chain, % 沿布局方向绘制
on grid, % 沿网格布局
align=center, % 内容居中对齐