![\parbox 高度可伸缩](https://linux22.com/image/440842/%5Cparbox%20%E9%AB%98%E5%BA%A6%E5%8F%AF%E4%BC%B8%E7%BC%A9.png)
我正在尝试创建一个\parbox
可以拉伸以填充可用空间的框架。我尝试过
\fbox{\parbox[c][0pt plus 1fill][t]{3in}{...Content...}}
但\parbox
似乎根本没有拉伸。 有没有办法将 设置\parbox
为可拉伸高度? 或者,有没有办法保存一个空的可拉伸框的尺寸,然后使用一些技巧,明确地将 设置为\parbox
如果可以拉伸则应具有的高度?
答案1
这与\parbox
和重叠\vfill
。它还使用 TikZ 和\tikzmark
在其周围绘制一个框架。
\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{tikzmark,calc}
\usepackage{lipsum}% MWE only
\newcounter{boxnumber}% for unique tikzmark names
\newcommand{\stretchable}[1]{\par\stepcounter{boxnumber}%
\strut\raisebox{0pt}[0pt][0pt]{\parbox[t]{3in}{#1}}%
\begin{tikzpicture}[overlay,remember picture]
\coordinate (top) at (0,\ht\strutbox);
\coordinate (bottom) at (pic cs:boxnumber.\theboxnumber);
\draw ($(top)+(2pt,2pt)$) rectangle ($(bottom)+(-2pt,-2pt)$);
\end{tikzpicture}\par
\vfill\tikzmark{boxnumber.\theboxnumber}\par}
\begin{document}
Some text before the box.
\stretchable{\lipsum[1]}
Some text between the boxes.
\stretchable{\lipsum[2]}
Bottom of page.
\end{document}
当然,在考试课上你可以使用\begin{solutionbox}{\stretch{1}} ... \end{solutionbox}
\documentclass{exam}
%\printanswers
\begin{document}
\begin{questions}
\question How high is up?
\begin{solutionbox}{\stretch{1}}
More than you can reach.
\end{solutionbox}
\question Why?
\begin{solutionbox}{\stretch{1}}
Why not?
\end{solutionbox}
\end{questions}
\end{document}
答案2
根据@John Kormylo的回答,我得到了一些代码,允许将宽度和高度设置为任何有效的skip
s。我对如何从 计算框的大小不满意tikzmarks
,而且我觉得我正在重新创建 的部分tcolorbox
,但这里是...
\documentclass[12pt]{exam}
\usepackage{expl3}
\usepackage{tikz}
\usetikzlibrary{tikzmark}
\usetikzlibrary{math}
\usetikzlibrary{calc}
\usepackage{lipsum}
\pagestyle{empty}
% Compute the size of the box with named top and bottom tikzmarker's.
% This cannot be done using Expl3 syntax because it relies on tikz understanding the ":" character.
\NewDocumentCommand{\ComputeBoxDims}{m m}{%
\begin{tikzpicture}[overlay,remember picture]
% The 0.7\baselineskip is the default height of \strut.
% This sets the top of the box to be right above the height of the text.
\coordinate (top) at ($(pic cs:#1)+(0,0.7\baselineskip)$);
\coordinate (bottom) at (pic cs:#2);
\draw[very thick, black, fill=blue!10!white] ($(top)$) rectangle ($(bottom)$);
% Compute the actual width and height of the box.
\tikzmath{
coordinate \C;
\C = (bottom) - (top);
\Cwidth = abs(\Cx);
\Cheight = abs(\Cy);
}
\global\let\gTmpBoxWidth\Cwidth
\global\let\gTmpBoxHeight\Cheight
\end{tikzpicture}%
}
\ExplSyntaxOn
% Make a box of zero size whose content is still shown
% I'm not sure how to do this with only expl3 boxes...
\NewDocumentCommand{\zero_area_box}{+m}{
\makebox[0pt][l]{
\raisebox{0pt}[0pt][0pt]{
\vbox_top:n {
#1
}
}
}
}
% A box that takes up no space and will be negatively offset
% by the given width and height
\NewDocumentCommand{\offset_box}{m m +m}{
\zero_area_box{\vspace{-#2}\hspace{-#1}\zero_area_box{#3}}
}
\skip_new:N \l_fullbox_skip_preferred_width
\skip_new:N \l_fullbox_skip_preferred_height
\dim_new:N \l_fullbox_dim_padding
\dim_new:N \l_fullbox_dim_box_width
\dim_new:N \l_fullbox_dim_box_height
\keys_define:nn { fullbox } {
width .skip_set:N = \l_fullbox_skip_preferred_width,
width .initial:n = {0pt plus 1fill},
height .skip_set:N = \l_fullbox_skip_preferred_height,
height .initial:n = {0pt plus 1fill},
padding .skip_set:N = \l_fullbox_dim_padding,
padding .initial:n = {0.3\baselineskip},
}
\newcounter{fullbox_counter}
\NewDocumentCommand{\fullbox}{o +m}{
\IfValueTF {#1}{
\keys_set:nn { fullbox } {#1}
}{
\keys_set:nn { fullbox } {}
}
\stepcounter{fullbox_counter}
\tikzmark{fullbox_top.\thefullbox_counter}
\skip_vertical:N \l_fullbox_skip_preferred_height
\skip_horizontal:N \l_fullbox_skip_preferred_width
\tikzmark{fullbox_bottom.\thefullbox_counter}
% For some reason the tikz picture has a non-zero size,
% so we stuff it in a size-zero box.
\zero_area_box{
\ComputeBoxDims
{fullbox_top.\thefullbox_counter}
{fullbox_bottom.\thefullbox_counter}
}
\dim_gset:Nn \l_fullbox_dim_box_width {\gTmpBoxWidth pt}
\dim_gset:Nn \l_fullbox_dim_box_height {\gTmpBoxHeight pt}
\offset_box
{
\dim_eval:n {\l_fullbox_dim_box_width - \l_fullbox_dim_padding}
}
{
\dim_eval:n {\l_fullbox_dim_box_height - \l_fullbox_dim_padding}
}
{
\parbox[l][0pt]{
\dim_eval:n {\l_fullbox_dim_box_width - 2\l_fullbox_dim_padding}
}{#2}
}
}
\ExplSyntaxOff
\begin{document}
\begin{questions}
\question Answer well.
\begin{parts}
\part What do you think?
\fullbox{}
\part What do you think?
\fullbox[height=\stretch{2}]{
\parskip=5pt
\lipsum[1-2]
}
\part Last question...
\fullbox[height=1in]{}
\end{parts}
\end{questions}
\end{document}