Comment 107 for bug 195929

We shouldn't settle for patch 2, IMHO.
We should set the data to true on every widget we keep, (with setup_widget_prototype and the like), because we want to advertise that all our widgets are transparent (apart from the entry which will be only if the style property is set, as it is in patch 2).

As for my other questions, I agree that it would be too much of a performance cost to prepaint every widget, especially since we don't know any real life engine bitten by this transparency. I had to raise the problem, but Benjamins answer is reassuring.

I'd go with this approach: we advertise that we paint directly on the canvas for every widget but the entry (ultra cheap, and most engines would probably ignore the info), and the entry is transparent only if we know the engine can cope with it.

I'll write the patch soon (like in less than 24 hours).