简短问题
如何通过仅修改来根据最后使用的键来设置键的值\pgfkeys
?
长问题
我想定义一组 pgfkeys,然后我将能够在许多函数中使用它。我希望它们只有几个参数,例如“width”、“height”和“pos”,这样我的函数就非常容易使用。所以基本的想法是使用:
\myRectangle[width=1cm, height=2cm, pos={(current page.center)}}
但是,我想允许用户使用快捷方式。例如,如果他使用键fullWidth
,则与使用完全相同width=\pagewidth
:
\myRectangle[fullWidth, height=2cm, pos={(current page.center)}}
但是因为矩形填满了整个宽度,所以给位置提供两个值是没有意义的,只有 1 有用(这里是高度)。所以我想让用户使用:
\myRectangle[fullWidth, height=2cm, pourcent=.5}
代替
\myRectangle[fullWidth, height=2cm, pos={(current page.north east) + (current page.north west) + (0,-.5\paperheight)}}
如果我们只是fullWidth
用替换fullHeight
,那么代码
\myRectangle[fullWidth, height=2cm, pourcent=.5}
应该相当于
\myRectangle[fullWidth, height=2cm, pos={(current page.north east) + (current page.north west) + (.5\paperheight,0)}}
(请注意,现在最后一对已经改变了)
所以,正如您所看到的,pourcent
有两个不同的目标,取决于最后使用的键,我不知道如何在代码中表达这一点。
这是我的 MWE:
\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{calc}
\usepackage{lipsum}
\graphicspath{{photos/}} % on change la racine
\usepackage{pgfkeys}
% Define the used keys in the following document
\pgfkeys{
/myKeys/.is family, /myKeys,
default/.style =
{
width = 1cm,
height = 1cm,
pos = {(current page.center)},
},
width/.estore in = \kWidth,
height/.estore in = \kHeight,
pos/.estore in = \kPos,
% Non fundamental keys
fullWidth/.style = {width=\paperwidth},
fullHeight/.style = {height=\paperheight},
pourcent/.style args={#1}{
% Works for fullWidth...
pos={(current page.north west) + (.5\paperwidth,-#1\paperheight)}
% But for fullHeight it should be
% pos={(current page.north west) + (#1\paperwidth,-.5\paperheight)}
}
}
% Create a rectangle. You can set the properties color, width
% height, pos, anchor, fullWidth, fullHeight, pospc, background
\newcommand{\myRectangle}[1][]{%
\pgfkeys{/myKeys, default, #1}%
\begin{tikzpicture}[remember picture,overlay]%
\node [inner sep=0pt, shape=rectangle, fill=red, minimum width=\kWidth, minimum height=\kHeight, anchor=center, at/.expanded={($\kPos$)}] {};%
\end{tikzpicture}%
}
\begin{document}
\myRectangle[fullWidth,pos={(current page.center)}]
\myRectangle[fullWidth,pourcent=.7]
% Does not work as expected... see pourcent/.style
\myRectangle[fullHeight,pourcent=.9]
\end{document}
-- 编辑 -- 我试过:
pourcent/.code args={#1}{
\edef\w{\pgfkeysvalueof{pourcent}}%
\ifx\w\paperwidth\relax%
\pgfkeysalso{pos={(current page.north west) + (.5\paperwidth,-#1\paperheight)}}%
\else%
\pgfkeysalso{pos={(current page.north west) + (.5\paperwidth,-\paperheight)}}%
\fi%
},
它可以编译,但不起作用,我猜测表达式\edef\w{\pgfkeysvalueof{pourcent}}
并没有减少......
答案1
最后我得到了它 !!!
pourcent/.code args={#1}{
\ifdim\kWidth=\paperwidth\relax%
\pgfkeysalso{pos={(current page.north west) + (.5\paperwidth,-#1\paperheight)}}%
\else\ifdim\kHeight=\paperheight\relax%
\pgfkeysalso{pos={(current page.north west) + (#1\paperwidth,-.5\paperheight)}}%
\else\fi\fi%
},