On Jun 26, 2008, at 5:21 PM, Graham Cox wrote:
you can still (and should) use -setNeedsDisplayInRect:, just don't make this conditional on -needsDisplay.I think to really get to the bottom of the delay problem we'd need to see the code in its full context. For example how does your drawRect: method know which rect(s) to repaint? Or does it just go over the whole lot? There could be many reasons why it's slow.
Unfortunately that's not an option, but it isn't really necessary. I've switched to updating the view from -mouseMoved: events doing my own hit testing and it works very quickly now, there is no more lag.
Notice the drawing mechanism didn't change, so the drawing wasn't causing the lag. I have no other explanation than a strange delay in the delivery of tracking area messages. What causes the delay I don't know, it's very likely my fault but it's most definitely not the drawing code.
Regards Markus -- __________________________________________ Markus Spoettl
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