我想在兩個節點之間畫一條線，這可能會飛過現有的形狀和文字內容。在下面的範例中，連接a和的線與節點b的標籤相交。init在我從 tikz 結果中註意到這一事實後，我可以手動進行「直線飛行」。但有沒有一些設施可以判斷這種情況並在運行時自動處理呢？就像是\draw [flyline, ->] (a) to (b)
\documentclass[convert]{standalone}
\usepackage{tikz}
\usetikzlibrary{shapes, positioning}
\begin{document}
\begin{tikzpicture}[auto]
\node[rectangle, draw=black, label={right:this is a test}] (init) {hello};
\node[rectangle, draw=black, above right=of init] (a) {a};
\node[rectangle, draw=black, below right=of init] (b) {b};
\draw [->] (a) to (b);
% I can change to use this after I find the intersect fact from the result
%\draw (a) to (a|-init.north);
%\draw [->] (b|-init.south) to (b);
\end{tikzpicture}
\end{document}
更新：回覆@Rmano 的評論：感謝您的回覆。是的，使用layer可以部分解決我的問題。我使用了 `tikz-layers` 包，它提供了 5 個預先定義的層。程式碼片段如下：
\documentclass[convert]{standalone}
\usepackage{tikz}
\usetikzlibrary{shapes, positioning, fit}
\usepackage{tikz-layers}
\begin{document}
\begin{tikzpicture}[auto]
\node[rectangle, draw=black, label={[fill=white, inner sep=2pt, name=lbl]right:this is a test}] (init) {hello};
\node[rectangle, draw=black, above right=of init] (a) {a};
\node[rectangle, draw=black, below right=of init] (b) {b};
\begin{scope}[on behind layer]
\draw [->] (a) to (b);
\end{scope}
\begin{scope}[on background layer]
\node [fit=(init)(a)(b)(lbl), fill=cyan] () {};
\end{scope}
\end{tikzpicture}
\end{document}
這給出了以下結果
我覺得不太完美的一件事是，這使得標籤覆蓋背景填充。最初label只是文本，現在它得到一個對背景填充不透明的形狀。我們可以像背景填充一樣更改標籤填充cyan，但這會建立另一個依賴項。
can是否有可能label有一個虛擬邊界，它只屏蔽下劃線draw而不屏蔽下劃線fill？
更新：根據 @Rmano 使用 `contour` 的建議，將 MWE 更新為以下內容
\documentclass[convert]{standalone}
\usepackage{tikz}
\usetikzlibrary{shapes, positioning, fit}
\usepackage{tikz-layers}
\usepackage{bidicontour}
\usepackage{bidi}
\bidicontourlength{2pt}
\begin{document}
\begin{tikzpicture}[auto]
\node[rectangle, draw=black, label={[inner sep=2pt, name=lbl]right:{\bidicontour{cyan}{this is a test}}}] (init) {hello};
\node[rectangle, draw=black, above right=of init] (a) {a};
\node[rectangle, draw=black, below right=of init] (b) {b};
\begin{scope}[on behind layer]
\draw [->] (a) to (b);
\end{scope}
\begin{scope}[on background layer]
\node [fit=(init)(a)(b)(lbl), fill=cyan] () {};
\end{scope}
%\draw (a) to (a|-init.north);
%\draw [->] (b|-init.south) to (b);
\end{tikzpicture}
\end{document}
這產生了近乎完美的結果
謝謝您的幫忙！
答案1
can是否有可能
label有一個虛擬邊界，它只屏蔽下劃線draw而不屏蔽下劃線fill？
我猜不會。
label={[fill=cyan]text}另外我認為，寫寫沒有太大差別label={[...]\bidicontour{cyan}{text}}。人總是需要在label={...}.
以下範例顯示嘗試僅寫入一次背景顏色。環境的定義pgfonlayerreversed是從我的複製的之前的回答。
\documentclass[tikz]{standalone}
\usetikzlibrary{backgrounds, shapes, positioning, fit}
\usepackage{xpatch}
\makeatletter
% copied from my previous answer https://tex.stackexchange.com/a/562606
\let\pgfonlayerreversed\pgfonlayer
\let\endpgfonlayerreversed\endpgfonlayer
\xpatchcmd\pgfonlayerreversed
{\expandafter\box\csname pgf@layerbox@#1\endcsname\begingroup}
{\begingroup}
{}{\fail}
\xpatchcmd\endpgfonlayerreversed
{\endgroup}
{\endgroup\expandafter\box\csname pgf@layerbox@\pgfonlayer@name\endcsname}
{}{\fail}
% similar to \tikz@background@framed, but using "pgfonlayerreversed" envi
\def\tikz@background@framed@reversed{%
\tikz@background@save%
\pgfonlayerreversed{background}
\path[style=background rectangle] (\tikz@bg@minx,\tikz@bg@miny) rectangle (\tikz@bg@maxx,\tikz@bg@maxy);
\endpgfonlayerreversed
}%
% similar to option "show background rectangle"
\tikzset{
show background rectangle reversed/.style={
execute at end picture=\tikz@background@framed@reversed
}
}
\makeatother
% user interface
\tikzset{
background color/.style={
show background rectangle reversed,
inner frame sep=2pt,
background rectangle/.append style={draw=none, #1},
every node/.append style={#1},
every label/.append style={#1}
}
}
\begin{document}
\begin{tikzpicture}[background color={fill=cyan}]
\node[draw, label={[inner sep=2pt, name=lbl]right:this is a test}] (init) {hello};
\node[draw, above right=of init] (a) {a};
\node[draw, below right=of init] (b) {b};
\begin{scope}[on background layer]
\draw [->] (a) to (b);
\end{scope}
\end{tikzpicture}
\end{document}
