On Jun 26, 2008, at 12:19 AM, Graham Cox wrote:
Why do you need to use tracking areas? I doubt that they are designed to handle hundreds of small regions. If you are dragging within the view, just hit-detect the rects yourself and mark them as needing update. If you need that to happen with just the mouse passing over the view (button not pressed) you can turn on mouseMoved: events and do the same thing.Tracking events are awkward at the best of times, and are mostly intended for cursor management. I think you'd find a more conventional approach a lot more fruitful.
Well, it certainly doesn't sound like that in the guide. There's no indication whatsoever that tracking areas are meant for cursor rectangle updates only, this is just one way to use them.
The documentation discourages using mouseMoved: events and encourages use of tracking areas. I can also see why. If I do it using mouseMoved: messages I basically have to do everything that tracking areas provide manually. There is no reason why the system's implementation should be any slower (it's exactly the same task). So, following the documentation, I was convinced that that's the way to go.
It appears I stand corrected. Regards Markus -- __________________________________________ Markus Spoettl
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