rp.combo {rpanel} | R Documentation |
This function adds a ‘combobox’ to the panel. When an item is pressed, a variable is set and an action function is called.
rp.combo(panel, variable, prompt=NULL, vals, initval=vals[1], pos=NULL, action=I, foreground=NULL, background=NULL, font=NULL, editable=FALSE, parentname=deparse(substitute(panel)), name=paste("combo", .nc(), sep=""), ...)
panel |
the panel in which the combobox should appear. |
variable |
the name of the variable whose value is set by the combobox. |
prompt |
the label for the combobox. |
vals |
the values of |
initval |
the initial value of |
pos |
the layout instructions. Please see the |
action |
the function which is called when an item is chosen. |
foreground |
colour of the text |
background |
colour of the text background |
font |
font to be used |
editable |
whether the combobox can be edited or not. |
parentname |
this specifies the widget inside which the combobox should appear. |
name |
name assigned to the combobox, used for disposing of the widget |
... |
... |
The function action
should take one argument, which should be the panel to which the combobox is attached.
See rp.grid
for details of the grid layout system.
If the parameter panel is the panelname string the same string is returned. If the panel object is used the altered panel is assigned to both the calling level and panel's environment level.
The action
function should return the panel. Without this assignment any widgets added or alterations made to panel parameters within the action
function will be lost.
Parameters parent
and ...
have been discontinued in version 1.1. Note that the argument previously named var
has been renamed variable
to avoid reserved
word issues.
rpanel: Simple interactive controls for R functions using the tcltk package. Journal of Statistical Software, 17, issue 9.
## Not run: callback <- function(panel) { print(panel$option) panel } panel <- rp.control() rp.combo(panel, option, "Pick an option:", c("Option1","Option2","Other options"), action=callback) ## End(Not run)