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rgwidgets

How do you refresh the contents of an R gWidget?

I'm creating a GUI in R using gWidgets (more specifically gWidgetstcltk). I'd like to know how to update the contents of selection-type widgets, such as gdroplist and gtable. I currently have a rather hackish method of deleting the widget and re-creating it. I'm sure there's a better way.

This simple example displays all the variables in the global environment.

library(gWidgets)
library(gWidgetstcltk)

create.widgets <- function()
{
  grp <- ggroup(container = win)
  ddl <- gdroplist(ls(envir = globalenv()), 
    container = grp)
  refresh <- gimage("refresh", 
    dirname   = "stock",
    container = grp,
    handler   = function(h, ...)
    {
      if(exists("grp") && !is.null(grp)) 
      {
        delete(win, grp)
      }
      create.widgets()   
    }
  )
}

win <- gwindow()
create.widgets()
Solution

  • AFAIK those refresh events are often owned by the window manager so this may be tricky.