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This is what I would like to achieve:

enter image description here

My MWE is below:

\documentclass{article}
\pagestyle{empty}

\usepackage{lmodern}

\usepackage{smartdiagram}
\usetikzlibrary{shapes.geometric}
\usetikzlibrary{positioning}

\tikzstyle{every picture}+=[remember picture]

\smartdiagramset{%
circular distance=40mm,
font=\normalsize,
text width=20mm,
module minimum width=30mm,
module minimum height=30mm,
module shape=diamond,
arrow tip=to,
%uniform arrow color=true,
arrow color=gray!50!black,
border color=black,
set color list={white,white,white,white,white,white}
}

\tikzstyle{mystyle}=[align=center,fill=white,drop shadow,draw,thick,circle,overlay,minimum width=20mm,text width=25mm]

\begin{document}
~\vfill
\smartdiagram[circular diagram]{a, b, c, d, e, f}
\tikz \node (a) [mystyle,above=10mm of module1] {Start}; 
\tikz \node (b) [mystyle,right=10mm of module6] {Finish};
\begin{tikzpicture}[overlay,>=to]
\path[->,gray!50!black,line width=3pt,fill=gray!50!black] (a) edge (module1);
\path[->,gray!50!black,line width=3pt,fill=gray!50!black] (module6) edge (b);
\end{tikzpicture}
\vfill
\end{document}

I would achieve a similar result in a more intuitive way. As you can see I needed to go inside smartdiagram.sty to know how the nodes were named, and then I need to use the overlay. Moreover, suggestions for start and finish are welcome.

share|improve this question
    
The given MWE has a compilation error: /smart diagram/u niform arrow color is an unknown pgfkey. Also, please don't use the minimal class -- article is a good one to use. See Why not use the minimal class. –  Peter Grill Mar 17 '13 at 3:04
    
Edit done. With the latest TeXLive 2012 it complies. Note that it requires 2 runs to put nodes at correct position. –  cacamailg Mar 17 '13 at 3:09
    
Still does not compile for me for the same reason as above. I have a fairly recent TeXLive2012. Are you perhaps using a non-released version of some library? –  Peter Grill Mar 17 '13 at 3:29
    
I am using a vanilla installation. Also I am not using any non-released library. However, I did a small editing to see if you can compile it. –  cacamailg Mar 17 '13 at 3:43
1  
Since you have some responses below that seem to answer your question, please consider marking one of them as ‘Accepted’ by clicking on the tickmark below their vote count (see How do you accept an answer?). This shows which answer helped you most, and it assigns reputation points to the author of the answer (and to you!). It's part of this site's idea to identify good questions and answers through upvotes and acceptance of answers. –  Jubobs Apr 20 '13 at 16:37

1 Answer 1

With version 0.3 (already sent on CTAN and thus available on TeXLive in few days) of the package to create such a diagram is a bit easier.

The code:

\documentclass[12pt]{article} 
\usepackage{smartdiagram}
\usesmartdiagramlibrary{additions} % library to create annotations 
\usetikzlibrary{shapes.geometric}
\begin{document} 
\begin{center}
\smartdiagramset{%
 circular distance=40mm,
 text width=20mm,
 module minimum width=30mm,
 module minimum height=30mm,
 module shape=diamond,
 arrow tip=to,
 uniform arrow color=true,
 arrow color=gray!50!black,
 border color=black,
 uniform color list=white for 6 items, % new key to make colors uniform easily
 circular final arrow disabled=true, % new key to remove the final arrow
 additions={
   additional item offset=15mm,
   additional item shape=circle,
   additional item border color=black,
   additional item shadow=drop shadow,
   additional arrow color=gray!50!black,
 }
}
\smartdiagramadd[circular diagram]{a, b, c, d, e, f}{
above of module1/Start,right of module6/End}
\smartdiagramconnect{-to}{additional-module1/module1}
\smartdiagramconnect{-to}{module6/additional-module2}
\end{center}
\end{document}

The result:

enter image description here

This method does not suffer anymore of the limitation on the number of additions that can be added.


First version

First of all a disclaimer: the solution I provide works if and only if one has to add just a start and an end to the diagrams.

It provides a new command \smartdiagramadd able to set the usual diagram plus the start/end: it receives 3 arguments:

  1. type of diagram
  2. list of elements in the diagram
  3. position/text of the start, position/text of the end (for example: above/Start,right/End).

It can be used as:

\smartdiagramadd[circular diagram]{a, b, c, d, e, f}{above/Start,right/End}

Moreover, the solution allows to customize the distance of the start/end modules by means of two new keys:

\pgfkeys{/smart diagram/.cd,
  add start module offset/.initial=10mm,
  add start module offset/.get=\addstartmodoffset,
  add start module offset/.store in=\addstartmodoffset,
  add end module offset/.initial=10mm,
  add end module offset/.get=\addendmodoffset,
  add end module offset/.store in=\addendmodoffset,
}

They should be used always within \smartdiagramset; for example:

\smartdiagramset{add end module offset=20mm}

Now, the code:

\documentclass{article}
\pagestyle{empty}

\usepackage{lmodern}

\usepackage{smartdiagram}
\usetikzlibrary{shapes.geometric}
\usetikzlibrary{positioning}

\pgfkeys{/smart diagram/.cd,
  add start module offset/.initial=10mm,
  add start module offset/.get=\addstartmodoffset,
  add start module offset/.store in=\addstartmodoffset,
  add end module offset/.initial=10mm,
  add end module offset/.get=\addendmodoffset,
  add end module offset/.store in=\addendmodoffset,
}

\smartdiagramset{%
circular distance=40mm,
font=\normalsize,
text width=20mm,
module minimum width=30mm,
module minimum height=30mm,
module shape=diamond,
arrow tip=to,
uniform arrow color=true,
arrow color=gray!50!black,
border color=black,
set color list={white,white,white,white,white,white}
}

\tikzset{module start-end/.style={
  align=center,
  fill=white,
  drop shadow,
  draw,
  thick,
  circle,
  minimum width=20mm,
  text width=25mm}
}


\NewDocumentCommand{\smartdiagramadd}{r[] m m}{
\tikzstyle{every picture}+=[remember picture]
\smartdiagram[#1]{#2}
\begin{tikzpicture}[overlay]
\foreach \smitem [count=\xi] in {#2}  {\global\let\numitems\xi}
\StrCut{#3}{,}\startdiagram\enddiagram
% start
\StrCut{\startdiagram}{/}\pos\textitem
 \node (module1-start) [module start-end,\pos=\addstartmodoffset of module1] {\textitem}; 
 \path[->,gray!50!black,line width=3pt,fill=gray!50!black] 
  (module1-start) edge (module1);
% end
\StrCut{\enddiagram}{/}\pos\textitem 
 \node (module\numitems-end) [module start-end,\pos=\addendmodoffset of module\numitems] {\textitem};
 \path[->,gray!50!black,line width=3pt,fill=gray!50!black] 
  (module\numitems) edge (module\numitems-end); 
\end{tikzpicture}
}

\begin{document}
\begin{center}
\smartdiagramset{add end module offset=20mm}
\smartdiagramadd[circular diagram]{a, b, c, d, e, f}{above/Start,right/End}
\end{center}
\end{document}

which gives (similar to the picture provided by the OP, but the end module is far):

enter image description here

Disclaimer

This solution just work with smartdiagram version 0.2 which already loads xstring, otherwise the package should be loaded separately.

share|improve this answer
2  
This is a wonderful improvement for the package: thanks cacamailg. I even realize that in order to have an uniform color also for the modules a new key should be added (similar to what happens for arrows) because the actual solution is not practicable (set a whole list of white). These will be the next things implemented :) –  Claudio Fiandrino Mar 17 '13 at 11:15
    
Thanks. The solution can still be improved. For example, I would like to have an open circular diagram, this is, between a and f no arrow. A new key, e.g., \smartdiagramaddnode for adding nodes above, below, in between two nodes would be good. Also, if you want to add a new arrow for an node outside the circle, there is no easy way to do it. –  cacamailg Mar 17 '13 at 11:52
    
@cacamailg: there's always room for improvements :) I think the open circular diagram can be easily done; something more difficult can be the \smartdiagramaddnode (are you think about it for some annotations?), but in principle could be addressed, even if I think in between two nodes may require a bit of work. However, to keep clear the site is always better ask one question at a time. –  Claudio Fiandrino Mar 17 '13 at 18:22
    
Yes. I was just giving you ideas to improve your package :P. –  cacamailg Mar 17 '13 at 21:49

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