On 3 June 2011 12:44, <e.y....@brighton.ac.uk> wrote: > On Fri, Jun 03, 2011 at 12:14:58 +0100, Jeremy O'Donoghue wrote: > > - Bugfix for assert error in SearchDynamicEventTable which was found > in > > debug builds. I believe that this is a proper fix for an issue Eric > noted a > > couple of months back. > > It's not just debug builds (of what?),
Of wxWidgets itself. I don't see the assertion for retail builds. I *do* see the assertion on debug builds for Windows, so I don't think it's a Mac issue. but basically the scenario where > you naively type "cabal install wx" on MacOS after having installed the > Haskell Platform and nothing else. Macs ship with wxWidgets, albeit > with this crucial bit of missing functionality. > > I'm a bit concerned that this may result in silently-does-the-wrong-thing > errors > > + if (evtHandler->GetDynamicEventTable() != NULL) > + found = evtHandler->SearchDynamicEventTable( event ); > > As I'd discovered to my dismay, without this trawl through the non-existent > dynamic event table, things like scrolled list boxes stop responding to > events. > > http://www.mail-archive.com/wxhaskell-devel@lists.sourceforge.net/msg00580.html > This is a bit more worrying - it's likely to be seen on other platforms as well. I didn't see the problem on any of the (few) test cases I ran, but it sounds more like a failure of what might laughably be called my test regime than a Mac specific issue. > If I understand the patch correctly, the result of this is that (A) > users would be able to happily install wxHaskell on Mac without any > prerequisites, but (B) if they were to use such a widget, it would just > silently not-work. > No - I think it would silently not work everywhere :-( > The even better solution would be for somebody to go understand how the > event > handling code works and propose a solution that works without the missing > dynamic event table > That's probably a better bet. I have the impression that you're not really supposed to call wxEvent::SearchDynamicEventTable() from outside anyway. They seem to have gone to some lengths to not document it in wxWidgets. I will have a go at understanding the event handling code. Wish me luck, I'll probably need it... Jeremy
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