gfile: Dialogs for file and date selection
In gWidgets: gWidgets API for Building Toolkit-Independent, Interactive GUIs

Description Usage Arguments Details Examples

These functions provide dialogs for file selection (files or directories) and date selections.

gfile(text = "", type = c("open", "save", "selectdir"), initialfilename = NULL, 
    filter = list("All files" = list(patterns = c("*")), "R files" =
    list(patterns = c("*.R","*.Rdata")),
        "text files" = list(mime.types = c("text/plain"))
        ), multi=FALSE, handler = NULL, action = NULL, ..., toolkit = guiToolkit())

gfilebrowse (text = "Select a file...", type = "open", quote = TRUE, 
    container = NULL, ..., toolkit = guiToolkit()) 

gcalendar(text = "", format = "%Y-%m-%d", handler=NULL, 
action=NULL, container = NULL, ..., toolkit = guiToolkit())

`text`	Initial text. For thecalendar, an optional date in a form matching `format`
`type`	When selecting a file it can be selected for opening, for saving or you may want to select a directory.
`initialfilename`	Suggested name for file save
`filter`	Filter for files shown during selection. Can be nested list, as in example or a named character vector with the names a description and value a file extension (no dots) of files endings to match.
`multi`	Logical. Allow selection of multiple files?
`quote`	Is result quoted
`format`	Format of date, default is year-month-day
`handler`	Handler for when file is changed. The component `file` of the first argument contains the file name
`action`	Passed to handler
`container`	Optional container to attach widget to
`...`	Passed to `gedit` instance
`toolkit`	Which GUI toolkit to use

The gfile dialog is modal, meaning no action can take place until a selection is made. Whereas the gfilebrowse dialog consists of a gedit instance to hold a filename and a button to click if the dialog is desired to fill in this filename.

The gcalendar widget is similar to the gfilebrowse widget.

For both gcalendar and gfilebrowse any ... arguments are passed to gedit. The coerce.with argument can be used to here to quote the values, or coerce them otherwise such as with as.Date. Otherwise, the svalue method returns a character string containing the value shown in the gedit box.

The svalue<-() method may be used to set the value for both gcalendar and gfilebrowse .

The return value is the filename selected. A NA value is returned if no file is selected.

## Not run: 
## source a file using a handler
sourceFile <- function() gfile("Select a file",type="open", handler =
function(h,...) source(h$file))

## source an R file using fact that dialog is modal
source(gfile(filter=c("R files"="R")))

## apply a generic action to the file
countLines <- function(filename) print(length(readLines(filename)))
chooseFile <- function() gfile("Select a file",type="open",
action="countLines", handler = function(h,...) do.call(h$action,list(h$file)))

## End(Not run)