Renato R. (RRaver) wrote:
> Hi guys,
>
> I'm trying to populate a listbox with some stored preferences but it
> doesn't work if I use inserItemAt only if I use appendItem, but
> appendItem is giving me a unordered list that changes its order
> everytime it is populated, so I decided to use insertItemAt...
>
> The code I am using is something like this...
>
> var signatures =
> prefService.getBranch("").getChildList("myExt.signatures", {});
>
> for (var i in signatures) {
> signaturesList.insertItemAt(i,
> myPref.getCharPref(signatures[i]) );
> }
>
> and the error is
>
> Error: uncaught exception: [Exception... "Component returned failure
> code: 0x80004005 (NS_ERROR_FAILURE) [nsIListBoxObject.getItemAtIndex]"
> nsresult: "0x80004005 (NS_ERROR_FAILURE)" location: "JS frame ::
> chrome://global/content/bindings/listbox.xml :: getItemAtIndex :: line
> 481" data: no]
getItemAtIndex is called from method inserItemAt in listbox.xml and your
problem here is, most likely, an index (i) problem. Add a dump("\ni:" +
i); to check the index, and be surprised, or change this line:
-for (var i in signatures) {
+for (var i=0; i < signatures.length; i++) {
Michael
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