notation view crash, was Re: [Rosegarden-devel] Matrix smooth move

[Chris C. <ca...@al...>]

Richard Bown wrote:
> has anyone noticed a crashing bug on the notation view when inserting notes?
> I get it very occasionally usually when inserting repeated notes quickly into
> a one bar segment just after it's been opened.

Yes, I would hypothesise that it has something to do with events
being accidentally processed during the refresh loop for previous
events' changes (because we call processEvents when updating the
progress bar, for instance) but I think it already happened before
that code ever appeared.

Are you seeing a report on stderr about a missing HEIGHT_ON_STAFF
property just before it dies?  Certainly some of my crashes have
been because I'm not catching the exception thrown when getting
that property from events that don't have it, but I'd rather fix
the root problem (events not having a property they should have)
than work around it by ignoring the error.


Chris