For the MWE below:
\documentclass[a4paper,11pt,twoside]{report}
\usepackage[left=2.5cm,right=2cm,top=2cm,bottom=2cm]{geometry}
\usepackage[T1]{fontenc}
\usepackage{amsmath, graphicx, tikz, enumerate, amssymb, pgf}
\usepackage{setspace}
\usepackage{pgfplots}
%\usepackage{slashbox} Used in original larger file
\usepackage{bchart}
\raggedbottom
\usepackage[bottom]{footmisc}
\usetikzlibrary{calc,trees,positioning,arrows,chains,shapes.geometric,%
decorations.pathreplacing,decorations.pathmorphing,shapes,%
matrix,shapes.symbols,automata}
\begin{document}
\setcounter{page}{1}
\renewcommand{\thepage}{\arabic{page}}
\singlespace
\begin{center}
\begin{tikzpicture}[->,>=stealth', auto,node distance=6cm,
thick,main node/.style={circle,fill=blue!20,draw,font=\sffamily\Large\bfseries}]
\node[main node] (1) {Design};
\node[main node] (2) [below left of=1] {Implement};
\node[main node] (3) [right of=2] {Test};
\node[main node,dashed, left of =1,fill=white] (4) {\parbox{4cm}{\centering Initial Design\&\\ Implementation}};
\path[every node/.style={font=\sffamily\small}]
(4) edge [bend left] node[left] {} (1)
(1) edge [bend right] node[left] {} (2)
(2) edge [bend right] node[right] {} (3)
(3) edge [bend right] node[right] {} (1);
\end{tikzpicture}
\end{center}
\end{document}
I want to group the blue circles possibly with a brace ("}") saying for each method
how can I do that ? and I guess what's a good looking way to do achieve this ?
slashbox
package is it really useful?