[ptx]

Yup, SWT is a wrapper for actual native widgets, similar to wxWidgets. Some widgets are custom though, like the horrendously ugly tab widgets, which might be what the other commenter is reacting to. And the spacing and alignment usually doesn't look great in most SWT-based apps I've seen, for some reason.

[fiddlerwoaroof]

At least on Apple platforms, I don’t think SWT uses Apple’s layout algorithms and so you end up with Cocoa controls with slightly wrong spacing