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Dear list,
Using gWidgets, I'm trying to construct a simple GUI where a user can select a
variable (in a data.frame) from a drop-down list and then set a limit using a
spin-button. Additionally, I want the default to, from and value arguments of
the spin-button to equal the min, max and mean of the selected variable,
respectively.
How do I get the spin-button to update when the user selects a different
variable from the drop-down list?
Here is my amateurish attempt at doing this, but the results are not
satisfactory, since it simple keeps adding new spin buttons and it doesn't
start up with a spin button.
.simple <- function(x){
addSpin <- function(h, ...){
data <- eval(parse(text = paste("x$", svalue(varis), sep = "")))
spin <- gspinbutton(from = min(data), to = max(data), value = mean(data))
add(mainG, spin)
}
win <- gwindow("Example")
mainG <- ggroup(horizontal = FALSE, container = win)
varis <- gdroplist(names(x), container = mainG)
addhandlerchanged(varis, handler = addSpin)
}
Any help whatsoever would be most appreciated.
Kind regards,
Stefan Janse van Rensburg
Macroprudential Division
Financial Stability Department
SARB
Tel : 012-313 4687
Fax : 012 313 4772
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