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引用节点以用于后续操作

tag-icon • tag-icon tikz-pgf nodes
引用节点以用于后续操作

tikz梯形的缺点已经被突出显示。我正在寻找一种平行四边形，它严格遵守给定的角度和文本宽度，同时允许垂直拉伸以适应节点文本（我不介意增加平行四边形的宽度以适应这些约束）。如果可以在所述后动作中引用当前节点的锚点，则可以通过在矩形形状上使用后动作绘制平行四边形来完成此操作。因此问题是：如何在后动作中访问当前节点的锚点？

编辑：以下代码显示了平行四边形是如何变形的（没有拉伸时长度不正确，拉伸时角度不正确）。它还介绍了我之前提到的方法：样式平行四边形必须传递一个现有节点作为参数，并围绕该节点绘制一个平行四边形。我希望能够在后动作中将其应用到的节点传递给它（当我写这篇文章时，我想知道是否需要后动作）。

\documentclass{minimal}
\usepackage[utf8]{inputenc}
\usepackage{tikz}
\usetikzlibrary{shapes}
\usetikzlibrary{calc}

% solution using trapezium
\tikzstyle{para} = [trapezium, trapezium left angle=60,
    trapezium right angle=120, draw=black, text width = 3cm,
    minimum height=.8cm]

% attempt at custom solution
\tikzset{parallelogram/.code={
    \draw[red] (#1.north west)
        -- ($(#1.south west)!.2!90:(#1.north west)$)
        -- (#1.south east)
        -- ($(#1.north east)!.2!90:(#1.south east)$)
        -- cycle;
}}

\begin{document}

Para(llelogram) shape using trapezium (no stretch) :

\begin{tikzpicture}
\node[para] {with a longer text with a longer text with a longer text with a longer text};
\node[para] at (0,2) {short};
\node[para] at (0,3) {.};
\end{tikzpicture}

Para(llelogram) shape using trapezium (trapezium stretches):

\begin{tikzpicture}[trapezium stretches]
\node[para] {with a longer text with a longer text with a longer text with a longer text};
\node[para] at (0,2) {short};
\node[para] at (0,3) {.};
\end{tikzpicture}

Para(llelogram) shape using trapezium (trapezium stretches body):

\begin{tikzpicture}[trapezium stretches body]
\node[para] {with a longer text with a longer text with a longer text with a longer text};
\node[para] at (0,2) {short};
\node[para] at (0,3) {.};
\end{tikzpicture}

Custom solution proposal:

\begin{tikzpicture}
\node[rectangle, densely dotted, draw, text width=3cm] (a) at (2,1) {test};
\node[rectangle, parallelogram=a] at (6,1) {dummy};
\node[rectangle, densely dotted, draw, text width=3cm] (b) at (2,-1) {with a longer text with a longer text with a longer text with a longer text};
\node[rectangle, parallelogram=b] at (6,-1) {dummy2};
\end{tikzpicture}
\end{document}

编辑 2：建议的自定义解决方案的结果 在此处输入图片描述

答案1

您可以使用append after command（或类似方法）向节点添加路径，并使用 引用节点\tikzlastnode。

例如，使用我从阿莱南诺：

\documentclass[tikz,border=10pt,multi]{standalone}
\usetikzlibrary{calc}
\tikzset{
  parallelogram/.style={
    append after command={% courtesy of Alenanno ref: https://tex.stackexchange.com/questions/287967/drawing-thin-line-around-a-multipart-tikz-shape#comment696552_287972
      \pgfextra{\draw[red] (\tikzlastnode.north west) -- ($(\tikzlastnode.south west)!.2!90:(\tikzlastnode.north west)$) -- (\tikzlastnode.south east) -- ($(\tikzlastnode.north east)!.2!90:(\tikzlastnode.south east)$) -- cycle;}
    }
  }
}

\begin{document}
\begin{tikzpicture}
  \node [rectangle, densely dotted, draw, text width=3cm, parallelogram] (a) at (2,1) {test};
  \node [rectangle, parallelogram] at (6,1) {dummy};
  \node [rectangle, densely dotted, draw, text width=3cm, parallelogram] (b) at (2,-1) {with a longer text with a longer text with a longer text with a longer text};
  \node [rectangle, parallelogram] at (6,-1) {dummy2};
\end{tikzpicture}
\end{document}

生产

固定宽度节点周围的平行四边形

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