Penalty of using QGraphicsObject vs QGraphicsItem?
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by Dutch
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Published on 2010-02-18T20:46:42Z
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2010/04/18
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I currently have a hierarchy of items based off of QGraphicsItem.
I want to move to QGraphicsObject instead so that I can put properties on my items. I will not be making use of signals/slots or any other features of QObject.
I'm told that you shouldn't derive from QObject because it's "heavy" and "slow".
To test the impact, I derive from QGraphicsObject, add a couple properties to my items, and look at the memory usage of the running app. I create 1000 items using both flavors and I don't notice anything more than 10k more memory usage.
Since all I am adding on to my items are properties, is it safe to say that QObject only adds weight if you are using signals/slots?
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