[Qt-interest] QTableWidget painting is all funky

[Paul England]

Got a real head scratcher here.

I've got a QTableWidget which will have potentially a ton of updates...
more than the eye can handle. So, I've implemented a simple model in
which a cleaning routine runs every 250 milliseconds and makes necessary
updates. The problem is that the top row sometimes takes several seconds
to repaint, even though the routine logs that it's cleaning it regularly
(before all the subsequent rows, as you'd expect). I've tried putting a
dummy row in and get the same results, so it really has nothing to do w/
the row number.

I can trigger an event where rows 1 & 2 (0 is a blank) will need an
update. 2 updates fine, 1 does not. Sometimes it updates after X
seconds, sometimes not at all (until I do something like run the mouse
over it). I can do the same thing to trigger an updates in rows 3 & 4.
In such a case, they both update. I've used the same mechanism before
with no issue. In fact, this one wasn't an issue on my machine until
just today, although I had seen it on other machines for a couple of
weeks now.


I'm at a loss here, as it just doesn't make sense when I look at the code.

Any insight would be appreciated.