带有 pgfplot 的节点的阴影

Question

我有这个代码：

\documentclass[tikz]{standalone}
\usepackage{pgfplots}
\usetikzlibrary{shadows}
\begin{document}
\begin{tikzpicture}
\node[drop shadow,draw,fill=green] {
  \begin{tikzpicture}
  \begin{axis}
   \addplot coordinates {(0,0) (1,1)};
  \end{axis}
  \end{tikzpicture}
};
\path [use as bounding box] (-5,-5) rectangle (5,5);
\end{tikzpicture}
\end{document}

这使

现在的问题是绘图也有阴影。我该如何避免这种情况？我尝试使用fill-pre或postaction将 pgfplot 背景更改为白色，但这没有帮助。

Answer 1

内部节点将继承阴影；这就是为什么嵌套不是一个好主意tikzpicrure。

您可以使用背景层添加彩色背景：

\documentclass[tikz,border=5pt]{standalone}
\usepackage{pgfplots}
\usetikzlibrary{shadows}

\pgfdeclarelayer{background}
\pgfsetlayers{background,main}

\begin{document}

\begin{tikzpicture}
  \begin{axis}
   \addplot coordinates {(0,0) (1,1)};
  \end{axis}
  \begin{pgfonlayer}{background}
  \draw[drop shadow,draw,fill=green] 
    ([yshift=3pt]current bounding box.north west) rectangle ([xshift=3pt]current bounding box.south east);
  \end{pgfonlayer}
\end{tikzpicture}

\end{document}

在评论中，有人要求有两个图，每个图都有彩色背景和阴影，并且都用箭头连接；这可以通过将图保存在框中（嵌套的安全方法tikzpicture）然后使用节点放置它们并绘制箭头来实现。一个例子：

\documentclass[tikz,border=5pt]{standalone}
\usepackage{pgfplots}
\usetikzlibrary{positioning,shadows}

\pgfdeclarelayer{background}
\pgfsetlayers{background,main}

\newsavebox\myboxa
\newsavebox\myboxb

\savebox\myboxa{%
\begin{tikzpicture}
  \begin{axis}
   \addplot coordinates {(0,0) (1,1)};
  \end{axis}
  \begin{pgfonlayer}{background}
  \draw[drop shadow,draw,fill=green] 
    ([yshift=3pt]current bounding box.north west) rectangle ([xshift=3pt]current bounding box.south east);
  \end{pgfonlayer}
\end{tikzpicture}%
}
\savebox\myboxb{%
\begin{tikzpicture}
  \begin{axis}
   \addplot coordinates {(0,0) (0.4,0.6) (0.7,0.2) (1,1)};
  \end{axis}
  \begin{pgfonlayer}{background}
  \draw[drop shadow,draw,fill=green] 
    ([yshift=3pt]current bounding box.north west) rectangle ([xshift=3pt]current bounding box.south east);
  \end{pgfonlayer}
\end{tikzpicture}%
}

\begin{document}

\begin{tikzpicture}
\node (a) {\usebox\myboxa};
\node[right=of a] (b) {\usebox\myboxb};
\draw[->] (a) -- (b);
\end{tikzpicture}

\end{document}