ساخت یک مستطیل با گوشه های قطری گرد

Question

کد زیر سه نوع مستطیل را می‌سازد:

\documentclass[tikz,border=5pt]{standalone}
\usetikzlibrary{shapes.misc, positioning}
\tikzstyle{alphabox} = [draw=red, fill=orange!50, very thick,
rectangle, rounded corners]
\begin{document}
\begin{tikzpicture}
\node (A) [alphabox] {It is A};
\node (B) [alphabox][left=of A,draw, rounded rectangle, rounded rectangle west arc=0pt] {It is B};
\node (C)[alphabox,left=of B,draw, rounded rectangle,rounded rectangle east arc=0pt] {It is C};
\end{tikzpicture}
\end{document}

شکل زیر خروجی را نشان می دهد:

اما می خواهیم مستطیلی به شکل زیر در کنار دیگر مستطیل ها قرار دهیم.

این کار را چگونه می توان انجام داد؟

Answer 1

ضمن تشکر از ایمان بیات به خاطر جواب درستشون (با رای مثبت) یک راه حل ساده تر به کمک دستور زیر است:

\tikzstyle{betabox}=[append after command={
			\pgfextra
			\draw [sharp corners, draw=red,very thick,fill=orange!50]% 
			(\tikzlastnode.west)% 
			[rounded corners=4pt] |- (\tikzlastnode.north)% 
			[rounded corners=0pt] -| (\tikzlastnode.east)% 
			[rounded corners=4pt] |- (\tikzlastnode.south)% 
			[rounded corners=0pt] -| (\tikzlastnode.west);
			\endpgfextra		}]

بنابراین کد کامل به این صورت است:

\documentclass[border=5pt]{standalone}
\usepackage{tikz}
\usetikzlibrary{shapes.misc, positioning}
\tikzstyle{alphabox} = [draw=red, fill=orange!50, very thick,
rectangle, rounded corners]
\tikzstyle{betabox}=[append after command={
			\pgfextra
			\draw [sharp corners, draw=red,very thick,fill=orange!50]% 
			(\tikzlastnode.west)% 
			[rounded corners=4pt] |- (\tikzlastnode.north)% 
			[rounded corners=0pt] -| (\tikzlastnode.east)% 
			[rounded corners=4pt] |- (\tikzlastnode.south)% 
			[rounded corners=0pt] -| (\tikzlastnode.west);
			\endpgfextra		}]
\begin{document}
\begin{tikzpicture}
  \node (A) [alphabox] {It is A};
\node (B) [alphabox][left=of A,draw, rounded rectangle, rounded rectangle west arc=0pt] {It is B};
\node (C)[alphabox,left=of B,draw, rounded rectangle,rounded rectangle east arc=0pt] {It is C};
\node[betabox]  [left= of C,   very thick]
    (D){It is D};
\end{tikzpicture}
\end{document}

خروجی هم به این شکله:

Answer 2

من این جواب رو برای مقصود شما تغییر دادم:

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{positioning,shapes.misc}
\tikzstyle{alphabox} = [draw=red, fill=orange!50, very thick,
 shape = rectangle with rounded corners]
\makeatletter
\pgfdeclareshape{rectangle with rounded corners}{
  \inheritsavedanchors[from=rectangle] % this is nearly a rectangle
  \inheritanchorborder[from=rectangle]
  \inheritanchor[from=rectangle]{center}
  \inheritanchor[from=rectangle]{north}
  \inheritanchor[from=rectangle]{south}
  \inheritanchor[from=rectangle]{west}
  \inheritanchor[from=rectangle]{east}
  \inheritanchor[from=rectangle]{north east}
  \inheritanchor[from=rectangle]{south east}
  \inheritanchor[from=rectangle]{north west}
  \inheritanchor[from=rectangle]{south west}
  \backgroundpath{% this is new
    % store lower right in xa/ya and upper right in xb/yb
    \southwest \pgf@xa=\pgf@x \pgf@ya=\pgf@y
    \northeast \pgf@xb=\pgf@x \pgf@yb=\pgf@y
    % construct main path
    \pgfkeysgetvalue{/tikz/rectangle with rounded corners north west}{\pgf@rectc}
    \pgfsetcornersarced{\pgfpoint{\pgf@rectc}{\pgf@rectc}}
    \pgfpathmoveto{\pgfpoint{\pgf@xa}{\pgf@ya}}
    \pgfpathlineto{\pgfpoint{\pgf@xa}{\pgf@yb}}
    \pgfkeysgetvalue{/tikz/rectangle with rounded corners north east}{\pgf@rectc}
    \pgfsetcornersarced{\pgfpoint{\pgf@rectc}{\pgf@rectc}}
    \pgfpathlineto{\pgfpoint{\pgf@xb}{\pgf@yb}}
    \pgfkeysgetvalue{/tikz/rectangle with rounded corners south east}{\pgf@rectc}
    \pgfsetcornersarced{\pgfpoint{\pgf@rectc}{\pgf@rectc}}
    \pgfpathlineto{\pgfpoint{\pgf@xb}{\pgf@ya}}
    \pgfkeysgetvalue{/tikz/rectangle with rounded corners south west}{\pgf@rectc}
    \pgfsetcornersarced{\pgfpoint{\pgf@rectc}{\pgf@rectc}}
    \pgfpathclose
 }
}
\makeatother
\begin{document}
\tikzset{
  rectangle with rounded corners north west/.initial=4pt,
  rectangle with rounded corners south west/.initial=4pt,
  rectangle with rounded corners north east/.initial=4pt,
  rectangle with rounded corners south east/.initial=4pt,
}
\begin{tikzpicture}%[every node/.style={fill=gray, rounded rectangle, minimum width=2cm, minimum height=1cm}]
  \node[
  alphabox,
  rectangle with rounded corners north west=4pt,
  rectangle with rounded corners south west=0pt,
  rectangle with rounded corners north east=0pt,
  rectangle with rounded corners south east=4pt,
] (D) {It is D};
\end{tikzpicture}

\end{document}

نتیجه: