Malc

What I ended up with in query and fluent:

            var query = from down in mouseDown
                        join delta in
                            from move in mouseMove.Buffer(2)
                            select Subtract(move.Last(), move.First())
                            on mouseUp equals Observable.Empty<Unit>() 
                        select delta;
//            var query = Observable.Join(
//                mouseDown,
//                mouseMove.Buffer(2).Select(b => Subtract(b.Last(), b.First())),
//                _ => mouseUp,
//                _ => Observable.Empty<EventArgs>(),
//                (_, r) => r);

...though interested if anyone came up with a way to buffer then collapse after the join (I battered my head against that approach for a while before going for this).

Also ended up with the same sln as BennyG first time after missreading the subscribe lambda...

Hi Mike and co...

Doing an eval on WPF and its different flavours here and am due to deliver the report in a couple of weeks. Have POC'd WPF native, XBAP, even some Atlas, but was hoping that the 'summer' CTP of WPF/E might make it into this... any chance? or even any samples, code, captures, etc that would allow me to factor some of it into our future strategy?

Thanks

Malc