R: Select Items from a List

tk_select.list {tcltk} | R Documentation

## Select Items from a List

### Description

Select item(s) from a character vector using a Tk listbox.

### Usage

    tk_select.list(choices, preselect = NULL, multiple = FALSE, title = NULL)

### Arguments

`choices` | a character vector of items.
`preselect` | a character vector, or `NULL`. If non-null and if the string(s) appear in the list, the item(s) are selected initially.
`multiple` | logical: can more than one item be selected?
`title` | optional character string for window title, or `NULL` for no title.

### Details

This is a version of `select.list` implemented as a Tk list box plus `OK` and `Cancel` buttons. There will be a scrollbar if the list is too long to fit comfortably on the screen.

The dialog box is modal, so a selection must be made or cancelled before the R session can proceed. As from R 2.10.1 double-clicking on an item is equivalent to selecting it and then clicking `OK`.

If Tk is version 8.5 or later, themed widgets will be used.

### Value

A character vector of selected items. If `multiple` is false and no item was selected (or `Cancel` was used), `""` is returned. If `multiple` is true and no item was selected (or `Cancel` was used) then a character vector of length 0 is returned.

### See Also

`select.list` (a text version except on Windows and the Mac OS X GUI), `menu` (whose `graphics=TRUE` mode uses this on most Unix-alikes).

[Package tcltk version 2.15.1 Index]