isInside: Determine if one SVG object is physically located within...
In duncantl/SVGAnnotation: Tools for post-processing SVG plots created in R

Description Usage Arguments Value Author(s) See Also Examples

This function and its methods allow us to query whether the bounding box or area of one SVG element is inside that of another.

1	isInside(obj, host)

`obj`	the object whose area might be inside the bounding box of `host`
`host`	the element whose area might enclose that of `obj`

A logical value with TRUE indicating obj is "inside" host, in a physical sense on the SVG display.

Duncan Temple Lang

getBoundingBox isAnnotationGroup getGeneralPath

doc = svgPlot({
           plot(1:10, pch = 21, fg = c("red"), bg = "lightgrey")

           points(1:10, pch = '+')

           abline(v = c(3, 7), col = 'blue', lty = 3)
           abline(h = c(3, 7, 9), col = 'lightgray', lty = 2)           
        })
g = xmlRoot(doc)[["g"]][[2]]
rr = getPlotRegionNodes(doc)

xmlSApply(rr[[2]], isInside, rr[[1]])

  # Compute the bounding box for the potential host/container
  # just once and pass it to each call to avoid it being computed each time.
 bb = getBoundingBox(rr[[1]])
 xmlSApply(rr[[2]], isInside, bb)

## Not run: 
    # no method for this yet.
  # Check if the first + is inside the first circle.
 isInside(rr[[2]][[1]], rr[[1]][[1]])

## End(Not run)