![检查定义未知 \pgfkeys](https://linux22.com/image/423718/%E6%A3%80%E6%9F%A5%E5%AE%9A%E4%B9%89%E6%9C%AA%E7%9F%A5%20%5Cpgfkeys.png)
我想使用创建一个大型家谱树genealogytree
包创建一个大型家谱树,并决定将人员数据存储在单独的文件中测试数据库.tex(包含三个人的 MWE)。从主文件test.tex
,我使用在“test_database.tex”中填写的键为创建一个新格式genealogytree
: 。xTestFormat
我阅读了 pgf 手册部分,\pgfkeys
并且我知道如何在使用密钥之前检查密钥是否存在,但在我的例子中却不知道。来自 MWE:由于我事先不知道数据库包含“Tom Water”数据,所以我不知道如何检查comment
“Tom Walter”的密钥是否存在。因此,当我尝试使用密钥时,我收到了错误消息:Undefined control sequence. }
。
当我们事先不知道 pgfkey 的名称时,如何检查它是否为空?
平均能量损失
(取消注释倒数第三行测试数据库.tex该文件将被编译(comment = {There is nothing to say}
)。)
测试.tex
\documentclass{standalone}
\usepackage[all]{genealogytree}
\begin{document}
% Define new keys in genealogytree database
\pgfkeys{/gtr/database/.cd,
nationality/.store in=\nationality,
given name/.store in=\givenname,
family name/.store in=\familyname
}
% Define new command with information to print
\newcommand\PrintPeople[1]{
\gtrPrintSex~\givenname
\familyname
\gtrPrintComment
}
% Define new format for genealogytree
\gtrDeclareDatabaseFormat{xTestFormat}
{% Define tcolorbox parameters based on 'nationality' key
\tcbset{french/.style={colback=blue!5!white,colframe=blue}}
\tcbset{british/.style={colback=red!5!white,colframe=red}}
}
{\PrintPeople}
\input{test_database}
\begin{tikzpicture}
\genealogytree[
timeflow=down,
processing=database,
database format=xTestFormat,
box={\nationality}
]
{child[id=fam_Water]{
p[id=Justine]{persdata=JustineID}
g[id=Tom]{persdata=TomID}
c[id=Jane]{persdata=JaneID}
}
}
\end{tikzpicture}
\end{document}
测试数据库.tex
% Create database
% Jane Water
\pgfkeys{/gtr/database/.cd,
persdata/.is choice,
persdata/JaneID/.style={
female,
nationality = british,
given name = Jane,
family name = Water,
comment = {Something else}
}
}
% Justine Random
\pgfkeys{/gtr/database/.cd,
persdata/.is choice,
persdata/JustineID/.style={
female,
nationality = french,
given name = Justine,
family name = Random,
comment = {Something interesting}
}
}
% Tom Water
\pgfkeys{/gtr/database/.cd,
persdata/.is choice,
persdata/TomID/.style={
male,
nationality = british,
given name = Tom,
family name = Water,
% comment = {There is nothing to say}
}
}
答案1
由于错误,Undefined control sequence. \gtrDBcomment
您可以通过测试是否\gtrDBcomment
定义来测试该 DB 条目是否存在,例如使用\ifdefined
。
如果您不知道,当 TeX 遇到未定义的控制序列时,它会抛出错误并显示一行上下文,在该行中,未定义的一个控制序列将是最后一个。在您的例子中,TeX 显示:
Undefined control sequence.
\gtrPrintComment ... {0pt}{\itshape \gtrDBcomment
}
第一行的最后一个控制序列是\gtrDBcomment
,这确实是 TeX 尝试扩展的控制序列,尽管它没有定义。
因此,如果您更改定义来\PrintPeople
测试该宏是否已定义,那么您应该会很好:
\newcommand\PrintPeople[1]{
\gtrPrintSex~\givenname
\familyname
\ifdefined\gtrDBcomment
\gtrPrintComment
\fi
}
完成 MWE:
\documentclass{standalone}
\usepackage[all]{genealogytree}
\begin{document}
% Define new keys in genealogytree database
\pgfkeys{/gtr/database/.cd,
nationality/.store in=\nationality,
given name/.store in=\givenname,
family name/.store in=\familyname
}
% Define new command with information to print
\newcommand\PrintPeople[1]{
\gtrPrintSex~\givenname
\familyname
\ifdefined\gtrDBcomment
\gtrPrintComment
\fi
}
% Define new format for genealogytree
\gtrDeclareDatabaseFormat{xTestFormat}
{% Define tcolorbox parameters based on 'nationality' key
\tcbset{french/.style={colback=blue!5!white,colframe=blue}}
\tcbset{british/.style={colback=red!5!white,colframe=red}}
}
{\PrintPeople}
% Contents of the database
% Jane Water
\pgfkeys{/gtr/database/.cd,
persdata/.is choice,
persdata/JaneID/.style={
female,
nationality = british,
given name = Jane,
family name = Water,
comment = {Something else}
}
}
% Justine Random
\pgfkeys{/gtr/database/.cd,
persdata/.is choice,
persdata/JustineID/.style={
female,
nationality = french,
given name = Justine,
family name = Random,
comment = {Something interesting}
}
}
% Tom Water
\pgfkeys{/gtr/database/.cd,
persdata/.is choice,
persdata/TomID/.style={
male,
nationality = british,
given name = Tom,
family name = Water,
% comment = {There is nothing to say}
}
}
% End of database
\begin{tikzpicture}
\genealogytree[
timeflow=down,
processing=database,
database format=xTestFormat,
box={\nationality}
]
{child[id=fam_Water]{
p[id=Justine]{persdata=JustineID}
g[id=Tom]{persdata=TomID}
c[id=Jane]{persdata=JaneID}
}
}
\end{tikzpicture}
\end{document}