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## Simple example of gformlayout
w <- gwindow("Form layout example")
g <- ggroup(cont=w, horizontal=FALSE)
fl <- gformlayout(cont=g)
## arguments for a t.test
gedit("", initial="A variable name", label="x", cont=fl)
e <- gedit("", initial="(optional) variable name", label="y", cont=fl)
gcombobox(c("two.sided", "less", "greater"), label="alternative", cont=fl)
gedit("", initial="mean", label="mu", coerce.with=as.numeric, cont=fl)
cb <- gcheckbox("", checked=FALSE, label="paired", cont=fl)
## link up components
enabled(cb) <- FALSE
addHandlerChanged(e, handler=function(h, ...) enabled(cb) <- nchar(svalue(h$obj)) > 0)
gbutton("run t.test", cont=g, handler=function(h,...) {
values <- svalue(fl)
values <- try(check_values(values), silent=TRUE)
if(!inherits(values, "try-error")) {
out <- capture.output(do.call("t.test", values))
cat(paste(out, collapse="\n"))
} else {
galert("Error with input values", parent=w)
}
})
## check that values are correct. Throw error if not
check_values <- function(values) {
values$x <- get(values$x, .GlobalEnv) #
if(nchar(values$y) == 0)
values$y <- NULL
if(!is.null(values$y))
values$y <- get(values$y, .GlobalEnv)
if(is.na(values$mu))
stop("Mean is not specified")
values
}
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