Nothing
setGeneric("imageMap", function(object, con, tags, imgname, ...)
standardGeneric("imageMap"))
setMethod("imageMap",
signature=signature(object="matrix", con="connection", tags="list",
imgname="character"),
definition=function(object, con, tags, imgname) {
if(!is.matrix(object)||ncol(object)!=4)
stop("'object' must be a matrix with 4 columns.")
for(i in seq(along=tags))
if(length(tags[[i]])!=nrow(object))
stop(paste("'tags[[", i, "]] must have as many elements as 'object' has rows (",
nrow(object),").", sep=""))
mapname <- paste("map", gsub(" |/|#", "_", imgname), sep="_")
base::writeLines(paste("<IMG SRC=\"", imgname, "\" USEMAP=\"#", mapname, "\" BORDER=0/>",
"<MAP NAME=\"", mapname, "\">", sep=""), con)
for(i in 1:nrow(object)) {
out = paste("<AREA SHAPE=\"rect\" COORDS=\"", paste(object[i,], collapse=","),
"\"", sep="")
for(t in seq(along=tags))
out = paste(out, " ", names(tags)[t], "=\"", tags[[t]][i], "\"", sep="")
out = paste(out, ">", sep="")
base::writeLines(out, con)
}
base::writeLines("</MAP>", con)
} ## end of definition
) ## end of setMethod
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