Revdep check failure with upcoming ggplot2 3.5.0

[Teun van den Brand]

Hi Thomas,

As you know, a new version of ggplot2 is coming up.
{ggraph} was in the list of packages with revdep failures.
While investigating, I've isolated the cause to the following lines:

ggraph/R/geom_edge_density.R

Lines 147 to 152 in febab71

 draw_key = function(data, params, size) { 
   rectGrob(gp = gpar( 
     col = NA, fill = alpha(data), 
     lty = 0 
   )) 
 }, 

Where data is not (anymore) a vector but a <data.frame>.
Should be fixable by using:

fill = alpha(data$edge_fill %||% data$fill %||% "darkgrey")

Cheers