Displaying 2 results from an estimated 2 matches for "tkexists".
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exists
2001 Feb 20
2
tcltk: testing for widgets?
Hallo!
I want to test if a widget exists. Using Perl/Tk i can call the function tkexists(). How can I realise this function with R/tclTk ?
Thanks
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Frank Gerrit Zoellner
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2001 Feb 03
1
tk non-widget commands (esp. update and winfo)
...er example is the use of logical results:
> if (tkwinfo ("exists", tt)) cat ("exists\n")
Error in if (tkwinfo("exists", tt)) cat("exists\n") :
argument of if(*) is not interpretable as logical
Huh? Here you might have expected:
> if (tkexists (tt)) cat ("exists\n")
exists
with
> tkexists <- function (widget) (tkcmd ("winfo", "exists", widget) == "1")
One problem is that the number of functions just explodes, so it might
be better to wrap them into one enchillada?
> tkwinfo <-...