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## Some functions that seem to be useful. These are not exported,
## hence repeated in gWidgetsR****. This should likely be changed, but
## for now it isn't
gwCat <- function(...) {
doCat <- getOption("gWidgetsDebug")
if(!is.null(doCat)) message(...)
}
Paste = function(..., sep="", collapse="") {
x = unlist(list(...))
x = x[!is.na(x)]
x = x[x != "NA"]
paste(x, sep=sep, collapse=collapse)
}
PasteWithComma = function(...) {
args = unlist(list(...))
args = args[!is.na(args)]
paste(args, sep="", collapse=", ")
}
quoteIfNeeded = function(str) {
if(length(grep('^\\".*\\"$', str, perl=TRUE)) > 0 ||
length(grep("^\\'.*\\'$", str, perl=TRUE)) > 0 )
return(str)
else
return(paste('"',str,'"',sep="",collapse=""))
}
## ReadParseEvaL -- saves typing
rpel = function(string, envir=.GlobalEnv) {
eval(parse(text=string), envir=envir)
}
## return type
str1 <- function(obj) {
md <- mode(obj)
lg <- length(obj)
objdim <- dim(obj)
if (length(objdim) == 0)
dim.field <- paste("length:", lg)
else {
dim.field <- "dim:"
for (i in 1:length(objdim)) dim.field <- paste(dim.field,
objdim[i])
if (is.matrix(obj))
md <- "matrix"
}
obj.class <- oldClass(obj)
if (!is.null(obj.class)) {
md <- obj.class[1]
if (inherits(obj, "factor"))
dim.field <- paste("levels:", length(levels(obj)))
}
list( type = md, dim.field = dim.field)
}
## untaint a variable name so that $ can be used
untaintName = function(objName) {
if (length(grep(" |\\+|\\-|\\*|\\/\\(|\\[|\\:",objName)) > 0) {
objName=Paste("\"",objName,"\"")
}
return(objName)
}
## as name says
stripWhiteSpace = function(str) {
sub('[[:space:]]+$', '', str) ## from ?gsub
sub('^[[:space:]]+', '', str) ## from ?gsub
return(str)
}
### We should make this configurable. Likely using options
### Use this for filtering
.datasets = c(
"numeric","logical","factor","character",
"data.frame","matrix","list",
"table","xtabs",
"nfnGroupedData","nffGroupedData","nmGroupedData"
)
.models = c("lm","glm","lqs","aov","anova",
"lme","lmList","gls",
"ar","arma","arima0","fGARCH","fAPARCH"
)
.ts = c("ts", "mts", "timeSeries", "its", "zoo")
.functions=c("function")
.plots = c("recordedplot")
knownTypes = list(
"data sets and models"=c(.datasets, .models, .ts),
"data sets"= c(.datasets,.ts),
"model objects" = .models,
"time series objects" = .ts,
"functions"=.functions,
"saved plots" = .plots,
"all" = NULL
)
## get does not work with name$component, this gets around that
## returns NULL if not available
getObjectFromString = function(STRING="", envir=.GlobalEnv) {
tmp = try(get(STRING, envir), silent = TRUE)
if(!inherits(tmp, "try-error")) return(tmp)
tmp = try(rpel(STRING,envir), silent=TRUE)
if(!inherits(tmp, "try-error")) return(tmp)
## out of chances
return(NULL)
}
## Find the name of the object by pasting toghther the pieces
## better to do name$name, but value may be a numeric
makeObjectName = function(root,value) {
if(is.null(root)) return(untaintName(value))
## now decide between $ and [[]]
if(value == make.names(value)) {
return(Paste(root,"$",untaintName(value)))
} else {
return(Paste(root,"[['",value,"']]"))
}
}
## a function to get objects and their types
## filter is a vector of classes
getObjectsWithType = function(root=NULL, filter = NULL, envir=.GlobalEnv) {
if(is.null(root)) {
objects = ls(envir=envir)
} else {
string = Paste("with(",root,",ls())")
objects = try(rpel(string,envir=envir), silent=TRUE)
}
## objects is character vector of components of root.
badnames = grep("[[<-]|\\*",objects)
if(length(badnames) > 0)
objects = objects[-badnames]
objectsWithRoot = sapply(objects,function(i) makeObjectName(root,i))
type = sapply(objectsWithRoot, function(i) {
string = Paste("str2(",i,")")
rpel(string, envir=envir)
})
objects = data.frame(Name=objects,Type=type,stringsAsFactors=FALSE)
## filter
if(!is.null(filter))
objects = objects[type %in% filter,]
return(objects)
}
## get the names of the object, if available (datastores)
getNamesofObject = function(string="") {
## if empty string, get variables in .GlobalEnv
if(string == "") {
## return objects of certain type
objects = getObjectsWithType(root=NULL, filter=knownTypes[['data sets']])
return(unlist(objects$Name))
}
obj = getObjectFromString(string)
if(!is.null(obj)) {
if(is.list(obj)) {
return(names(obj))
} else if(is.matrix(obj)) {
return(colnames(obj))
} else{
return(NULL)
}
} else {
return(NULL)
}
}
## used to check output
is.empty = function(obj) {
if(is.null(obj) || is.na(obj) || (is.character(obj) && obj == "")) {
return(TRUE)
} else {
return(FALSE)
}
}
## fix font mess up DEPRECATED!!
.fixFontMessUp = function(val) {
if(is.vector(val)) {
tmp = val
val = list()
for(i in names(tmp)) val[[i]] = tmp[i]
}
weights = c("normal","oblique", "italic")
styles = c("ultra-light","light","normal","bold","ultra-bold", "heavy")
a = val$weight; b = val$style
if((!is.null(a) && a %in% styles) || (!is.null(b) &&b %in% weights)) {
tmp = a
val$weight <- b
val$style <- a
}
return(val)
}
## what type of object is thixs and a size
str2 <- function(obj) {
md <- mode(obj)
if (is.matrix(obj)) md <- "matrix"
obj.class <- oldClass(obj)
if (!is.null(obj.class)) {
md <- obj.class[1]
}
return(md)
}
## blurb about installation -- put in so can be updated easily
## look to file to update
installing_gWidgets_toolkits <- function() {
file <- system.file("install/Installing_gWidgets_Toolkits.txt", package="gWidgets")
tmp <- readLines(file)
for(i in tmp) cat(i,"\n")
}
##' return x unless null then give default
getWithDefault <- function(x, default)
ifelse(is.null(x) || is.na(x) || x == "", default, x)
## ID is used by the ANY widgets
n=0;assignInNamespace("n",0,"gWidgets")
getNewID = function() { # get new one, incremented
n = getFromNamespace("n",ns="gWidgets")
assignInNamespace("n",n+1,ns="gWidgets")
return(n+1)
}
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