[Potlatch-dev] [OpenStreetMap] #3587: Tag keys/values should be restricted to 255 characters

[Richard Fairhurst]

Andy Allan wrote:
> Well, I don't have steps to reproduce

I think I'm starting to. This is _really_ weird.

Obviously this isn't the only way to trigger it, but try this:

1. Open a Potlatch 2 instance. Select a way. Select 'Advanced'. Delete some
tags with the 'X' button.
2. In another tab - yes, really - open a page with another Flex SWF. I've
found
http://www.trynull.com/2010/02/11/programatically-select-a-datagrid-cell-in-flex/
works.
3. Go back to the P2 tab. Start selecting ways. It's stuck.

The reason it's stuck is that (in TagGrid.mxml), somehow editedItemPosition
has gained a value, despite no cell being edited. I put a
"trace(outerDocument.editedItemPosition)" into line 53 of TagGrid.mxml. In
normal operation, clicking 'X' would result in "null" in the Flash log; when
it's stuck, it results in "[Object object]".

You can unstick it, very simply, by selecting a cell for editing. That sets
editedItemPosition again properly and all is well with the world.

So we're triggering a Flex bug of some sort. It may, perhaps, have something
to do with bEditedItemPositionChanged not being set to true somewhere in
DataGrid.as. I wonder if there's any event on DataGrid that we can listen
for and then nullify editedItemPosition manually when it fires...

cheers
Richard



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