Hana Sevcikova <hanas <at> uw.edu> writes:
>
> Hello everyone,
>
> Is it possible to restrict gdf (from gwidgets) in a way that it adds
> neither rows nor columns (and possibly doesn't allow to change row and
> column names)?
> I'd like a widget where the user can only edit the values of a data
> frame, not change its dimensions. I really like gdf but the feature of
> adding rows and columns would be quite confusing in my specific application.
>
> Thanks a lot,
>
> Hana
>
Dear Hana,
Not really. However, you can get a start on what you want by modifying the
following. It uses a nifty one liner by Michael Lawrence to add the cell
renders. The model variable has the usual data frame methods to access the data.
Hope this helps. --J
library(RGtk2) ## need this
library(gWidgets)
options(guiToolkit="RGtk2")
model <- rGtkDataFrame(mtcars)
view <- gtkTreeView(model)
## Michael Lawrence's trick to add cell renderer's
mapply(view$insertColumnWithAttributes, -1, colnames(model),
list(gtkCellRendererText()), text = seq_len(ncol(model)) - 1)
sw <- gtkScrolledWindow()
sw$add(view)
sapply(1:ncol(model), function(j) {
cr <- view$getColumn(j-1)$getCellRenderers()[[1]]
cr['editable'] <- TRUE
gSignalConnect(cr, "edited",
f=function(cr, path, newtext, user.data) {
curRow <- as.numeric(path) + 1
curCol <- user.data$column
model <- user.data$model
## coerce newtext from character to desired type
## otherwise this coerces to character
model[curRow, curCol] <- as.numeric(newtext)
}, data=list(model=model, column=j))
})
## How to add within a gWidgets GUI
w <- gwindow("test")
g <- ggroup(cont=w)
add(g, sw, expand=TRUE)
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