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It seems that the tikz-qtree and tkz-graph packages both define (or redefine) the \edge macro... I'd like to use both, but it doesn't seem possible:



\begin{tikzpicture}[level distance=40pt]
\Tree [.A [.B [.C a ] ]
          [.D [.E quote ]
               [.F \edge[roof]; {Eye of newt, and toe of frog} ] ] ]



I get the following error when compiling the document above:

! Use of \@edge doesn't match its definition.
<recently read> \edge 

l.12               [.F \edge
                            [roof]; {Eye of newt, and toe of frog} ] ] ]

Is there a workaround?

share|improve this question
up vote 7 down vote accepted

Sorry I'm guilty. I have not taken sufficient precautions. The problem comes from :

\newcommand*{\Edge}[1][]{\@edge[#1]}%  because tikz-qtree defines `\@edge` too :(

A better way was to use \tkz@edge instead of \@edge. In the next version with pgfkeys, I'll be more careful.

Actually you can save the next file with the name : patch-tkz-graph.tex

  % patch-tkz-graph.tex : patch for tkz-graph

 \tikzset{LocalEdgeStyle/.style={color = \cmdGR@edge@color,
                                 line width = \cmdGR@edge@lw}}}{%
 \tikzset{LocalEdgeStyle/.style={line width = \cmdGR@edge@dd,
                                 color = \cmdGR@edge@double,
                                 double distance = \cmdGR@edge@lw,
                                 double  = \cmdGR@edge@color}}}%
      \noexpand   \draw[LocalEdgeStyle,\cmdGR@edge@style,EdgeStyle]}%
                  \@tempa (#2) to (#3)}{%
      \noexpand   \draw[LocalEdgeStyle,\cmdGR@edge@style,EdgeStyle] (#2) to%
     node[fill = \cmdGR@edge@labelcolor,
          text = \cmdGR@edge@labeltext,
    {\cmdGR@edge@label} (#3)}%


And then

% no need to load tikz, tkz loads tikz 
\usepackage{tkz-graph}% in first  

\begin{tikzpicture}[level distance=40pt]
\Tree [.A [.B [.C a ] ]
          [.D [.E quote ]
               [.F \edge[roof]; {Eye of newt, and toe of frog} ] ] ]

\Vertex[style={line width=2pt}]{A}
\Vertex[x=6,y=0,style={line width=2pt}]{B}
\Edge[style={->,>=latex,bend left=90},label=$x$](A)(B)


enter image description here

share|improve this answer
@AndrewStacey Thanks for editing and for the corrections! I need to be more careful in my packages, but also in my answers – Alain Matthes Jun 18 '12 at 13:18
@Altermundus: thank you for your answer and for the patch! It works perfectly. – Jay Jun 18 '12 at 13:25
@Altermundus It was only a very minor edit. I strongly suspect you're not the only one that's used an obvious name for a macro only to find it used in some other package ... – Loop Space Jun 18 '12 at 13:29
@AndrewStacey Yes I know and it's not the first time. I was careful with my new packages. I need to rewrite tkz-graph with pgfkeys and some new tools from pgf 2.1 and with some others ideas. – Alain Matthes Jun 18 '12 at 14:20

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