R RGtk2 gmenu: submenu after using gaction

In the next example we have a mainmenu with aData. How can we have a submenu with 开发者_运维问答aData1 and aData2 ?

library(gWidgets)
options(guiToolkit = "RGtk2")

aData <- gaction(label="File", icon="file")
aData1 <- gaction(label="Open", icon="open")
aData2 <- gaction(label="Close", icon="close")

ml <- list(Data=aData)

gmenu(ml, container = TRUE)

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This is related to your previous question. The answer is basically no, but if you are willing to use the developmental version of gWidgets2:

require(devtools)
install_github("gWidgets2", username="jverzani")
install_github("gWidgets2RGtk2", username="jverzani")

then you can hack this in, as that version allows you to put in widgets into the toolbar. Here is something that kind of works:

w <- gwindow()

h <- function(h,...) print("hi")
l <- list(file=gaction("file", icon="ok", handler=h),
          open=gaction("open", icon="open", handler=h),
          quit=gaction("quit", icon="quit", handler=h))
popup <- gmenu(l, popup=TRUE)

tbl <- list(c=gaction("cancel", icon="cancel", handler=h),
            b=gbutton("file")) ## adding a widget
addPopupMenu(tbl$b, popup) ## put popup menu on b
tbl$b$remove_border()

tb = gtoolbar(tbl, cont=w, style="both-horiz")
glabel("fill me in", cont=w)

I still need to add some of the widgets into this version (no tree widget, data frame editor, and others yet).

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I think you're looking for this:

gmenu(menulist = list(File = list(Open = aData1, Close = aData2)), container = TRUE)