R help - Aug 2006 - tk combobox question

Hello!

The IWigdets::combobox has an option "selectioncommand" to specify a
procedure
which is called when an item in the combobox is selected.

Does ComboBox from Bwidgets have an equal option or is there a simple method to 
do thi? I haven't found one but i would like to use Bwidgets instead of
Iwidgets.

Another question which should not be a problem, but at the moment I just
don't
see the answer:

How can I get the index of the selected item in an Iwidgets combobox? Till now I
am only able to get the contents of the selected combobox item.

Regards,
Franco Mendolia

I think you want something like this:

  require(tcltk) || stop("Package tcltk is not available.")
  version.BWidget <- tclvalue(tclRequire("BWidget"))

  modify_command <- function() {
    print("Hey, I'm modified...")
  }

  tt <- tktoplevel()

  values = c("foo", "bar", "jeebee")
  combo <- tkwidget(tt, "ComboBox", "-modifycmd", 
                    modify_command, values=values)
  tkgrid(combo)
> How can I get the index of the selected item in an Iwidgets combobox? Till
now I
> am only able to get the contents of the selected combobox item.
For BWidget:
  as.numeric(tclvalue(tcl(combo,"getvalue")))+1

I haven't used Iwdigets yet...

JeeBee.