[cairo] Drawing an arrow

[Stefan Salewski]

On Tue, 2010-11-23 at 16:27 +0000, necko necko wrote:
> A set of 2D coordinates needs be connected by lines, but some of these
> lines need be arrows;
> meaning, the sequence
> 
>     cairo_move_to (cr, A.x, A.y);
>     cairo_line_to (cr, B.x, B.y);
> 
> that draws a line from A to B, needs to be replaced with an arrow from
> A to B.
> Any help on how to achieve this is highly welcome.
> Thanks
> 

Can you imagine building an arrow of 3 or more line segments?
I guess there will not be an arrow primitive in cairo, because arrows
can have so many shapes. But it is easy to define your own, adapted to
your desire.