How can I increase arrow-head size in tkz-graph?

Question

How can I increase the size of the head of the arrows in a tkz-graph graph? This question is similar to Is it possible to change the size of an arrowhead in TikZ/PGF?, but requires an adaptation of the solution to tkz-graph specifically.

Answer 1

With \SetUpEdge you could adapt the answers given in the question you mention. For example:

\pgfarrowsdeclare{biggertip}{biggertip}{%
  \setlength{\arrowsize}{1pt}  
  \addtolength{\arrowsize}{.5\pgflinewidth}  
  \pgfarrowsrightextend{0}  
  \pgfarrowsleftextend{-5\arrowsize}  
}{%
  \setlength{\arrowsize}{1pt}  
  \addtolength{\arrowsize}{.5\pgflinewidth}  
  \pgfpathmoveto{\pgfpoint{-5\arrowsize}{4\arrowsize}}  
  \pgfpathlineto{\pgfpointorigin}  
  \pgfpathlineto{\pgfpoint{-5\arrowsize}{-4\arrowsize}}  
  \pgfusepathqstroke  
}  

\begin{tikzpicture}
  \Vertex{a}
  \Vertex[x=2,y=0]{b}
  \Vertex[x=4,y=0]{c}
  {\SetUpEdge[style={->,>=triangle 45}]
    \Edge(a)(b)}
  {\SetUpEdge[style={->,>=biggertip}]
    \Edge(b)(c)}
\end{tikzpicture}