## Usage

# S4 method for Raster
click(x, n=Inf, id=FALSE, xy=FALSE, cell=FALSE, type="n", show=TRUE, ...)# S4 method for SpatialGrid
click(x, n=1, id=FALSE, xy=FALSE, cell=FALSE, type="n", ...)

# S4 method for SpatialPolygons
click(x, n=1, id=FALSE, xy=FALSE, type="n", ...)

# S4 method for SpatialLines
click(x, ...)

# S4 method for SpatialPoints
click(x, ...)