Long time reader, first time poster. I just can't seem to find a solution to this problem, so I defer to your expert advice! I initially tried to create a TiKzpicture inside of a node of a TiKzpicture, but then when I tried to draw edges between nodes within the inner TiKzpicture, I got the following error:
Undefined control sequence \path[->] (w0) edge[bend left=10] node[right] {$\R^{0}$} (v0);
(The error actually didn't fully display the line, no matter how I tried to coax TexStudio to tell me what the full error was, so I just copied the first offending line.)
I read this post (I don't have sufficient reputation to post links with appropriate formatting. Ugh!! How to avoid nesting of tikzpicture? ) One solution proposed was to create a lrbox which would contain the TiKzpicture, and then to use the command declared in the preamble of the document as follows:
\newsavebox\helloworld
...
\node [label={below:Hello World}] (hw) {\usebox\helloworld};
This actually solved the problem above, and the edges were successfully drawn between the desired nodes (e.g. (w0, v0) and (w1, v1). However, a new problem has arisen: I'm trying to draw an edge from a node within the TiKzpicture contained in the lrbox to a node in the "outer" TiKzpicture. From my understanding, the contents of the lrbox are rendered before the contents of the outer TiKzpicture; however, I'm not sure how else to approach this.
Here's from before I add the edge in, and then what happens after I add the edge:
Here's my full code:
\documentclass{article}
\usepackage{float, latexsym, tikz, amssymb, amsmath, amsthm, graphicx, caption}
\usetikzlibrary{shapes,arrows,positioning,fit,matrix,calc}
\newsavebox\disjUn
\newcommand{\R}{\mathcal{R}}
\newcommand{\F}{\mathfrak{F}}
\begin{document}
\tikzstyle{frame}=[draw,ellipse,minimum height=6cm,minimum width=2cm]
\tikzstyle{world} =[draw,circle,fill=black, inner sep=0pt, minimum size=3pt]
\begin{lrbox}{\disjUn}
\begin{tikzpicture}[node distance=3cm]
\node[frame] (F0){};
\node at ([xshift=-1em, yshift=-4em]F0.north) [world, label={70:$(w,0)$}] (w0){};
\node at ([yshift=3em]F0.south west) [world, label={-70:$(v,0)$}] (v0){};
\path[->] (w0) edge[bend left=10] node[right] {$\R^{0}$} (v0);
\node[frame, right of=F0] (F1){};
\node at ([xshift=-1em, yshift=-4em]F1.north) [world, label={70:$(w,1)$}] (w1){};
\node at ([yshift=3em]F1.south west) [world, label={-70:$(v,1)$}] (v1){};
\path[->] (w1) edge[bend left=10] node[right] {$\R^{1}$} (v1);
\end{tikzpicture}
\end{lrbox}
\begin{figure}[H]
\centering
\begin{tikzpicture}[remember picture, node distance=3cm, transform canvas={scale=0.9}]
\node[draw=white, label={below:$\F \oplus \F$}] (FF) {\usebox\disjUn};
\node[frame,right of=FF, xshift=3cm,label={below:$\F^{\prime}$}] (Fp){};
\node at ([yshift=-4em]Fp.north) [world, label={70:$\hat{w}$}] (w){};
\node at ([yshift=3em]Fp.south west) [world, label={-70:$\hat{v}$}] (v){};
\node at ([yshift=3em]Fp.north east) [world, label={70:$w^{\prime}$}] (wp){};
\path[->] (w) edge[bend left=10] node[right] {$\R^{\prime}$}(v);
\path[-] (wp.west) edge[bend right,draw=gray, dashed] node [below]{} (Fp.north);
\path[-] (wp.south east) edge[bend left,draw=gray, dashed] node [below]{} (Fp.north east);
\path[->] (w0) edge[bend right, dashed] node[above] {$g$}(w);
%\path[->] (w1) edge[bend right,dashed] node[above] {$g$}(wp);
\end{tikzpicture}
\end{figure}
\end{document}
Are there any alternate solutions where I can nicely position the worlds within ellipses and have edges between these structures? Thanks so much in advance!
EDIT: I would also like to note that I am using the \disjUn TiKzpicture in a lrbox as a component of two TiKzpictures; I liked the fact that I could edit the diagram in only one place, and have the changes reflected in both diagrams! However, the fact that I cannot seem to draw edges to nor from nodes within this environment is problematic :(
A friend of mine recommended using \begin{scope}[...] \end{scope} to contain the different structures, but there's still the problem of code re-use, and positioning the worlds (the black dots) relative to the ovals... Thanks again for reading! :)
EDIT2: Thanks to AJN, I discovered that I had originally used the
remember picture
Argument in the wrong TiKz picture; it is meant to be on the inner TiKz picture; I suppose that this is because we want the compiler to remember the node names for use in the parent TiKz picture.
frame,worldetc do not seem to be defined..picwould provide or does nesting break some features?