R/zzz.R

In tclish: 'Tcl/Tk' Utilities Package

###
### $Id: zzz.R 808 2014-06-24 22:44:59Z proebuck $
###


##
## Package/Namespace Hooks
##

##-----------------------------------------------------------------------------
.onAttach <- function(libname, pkgname) {
    verbose <- getOption("verbose")
    if (verbose) {
        local({
            libraryPkgName <- function(pkgname, sep="_") {
                unlist(strsplit(pkgname, sep, fixed=TRUE))[1]
            }
            packageDescription <- function(pkgname) {
                fieldnames <- c("Title", "Version")
                metafile <- file.path(libname, pkgname, "DESCRIPTION")
                meta <- as.list(read.dcf(metafile, fieldnames))
                names(meta) <- fieldnames
                return(meta)
            }

            meta <- packageDescription(pkgname)
            msg <- sprintf("%s, version %s",
                           meta$Title, meta$Version)
            packageStartupMessage(msg)
            msg <- sprintf("Type library(help=%s) to see package documentation",
                           libraryPkgName(pkgname))
            packageStartupMessage(msg)
        })
    }
}


##-----------------------------------------------------------------------------
.onLoad <- function(libname, pkgname) {
    ## Load the Tcl/Tk options database using package defaults
    appdefaultsfile <- system.file("app-defaults", sprintf("%s.ad", pkgname),
                                   package=pkgname)
    optiondb_readfile(appdefaultsfile,
                      "widgetDefault",
                      verbose <- getOption("verbose"))
}