<AWT Dev> [9] Review request for 8166591 [macos 10.12] Trackpad scrolling of text on OS X 10.12 Sierra is very fast (Trackpad, Retina only)

[Alexandr Scherbatiy]

On 9/30/2016 1:31 PM, Sergey Malenkov wrote:
>> # C  [AppKit+0x3a528e]  -[NSApplication _crashOnException:]+0x6d
>>
>> The app is crashed as soon as I start scrolling. Investigating...
>> May be it is my fault during backporting.
> Sorry, it was my fault. Now it works.
>
> Consider how it works for one short gesture:
>
> phase3 0 ~ 0.0 // unexpected PHASE_CONTINUED
> phase2 0 ~ -0.0222015380859375 // PHASE_STARTED
> phase3 0 ~ -0.1589202880859375
> phase3 0 ~ -0.179595947265625
> phase5 -1 ~ 0.0 // PHASE ENDED
> phase1 -1 ~ -0.335968017578125
> phase1 -1 ~ -0.3228607177734375
   This is because the trackpad sets NSScrollWheel phase value to null 
and we detect it is a mouse.
   Probably there is a better way to separate mouse wheel and trackpad 
events.

   Thanks,
   Alexandr.

> phase1 -1 ~ -0.338653564453125
> phase1 -1 ~ -0.3087005615234375
> phase1 -1 ~ -0.314056396484375
> phase1 -1 ~ -0.314666748046875
> phase1 -1 ~ -0.31573486328125
> phase1 -1 ~ -0.2690277099609375
> phase1 -1 ~ -0.2614288330078125
> phase1 -1 ~ -0.211517333984375
> phase1 -1 ~ -0.2041168212890625
> phase1 -1 ~ -0.15740966796875
> phase1 -1 ~ -0.1521148681640625
> phase1 -1 ~ -0.1095123291015625
> phase1 -1 ~ -0.1052703857421875
> phase1 -1 ~ -0.067291259765625
> phase1 -1 ~ -0.0644683837890625
> phase1 -1 ~ -0.062286376953125
> phase1 -1 ~ -0.060150146484375
> phase1 -1 ~ -0.02899169921875
> phase1 -1 ~ -0.0279083251953125
> phase1 -1 ~ -0.0271148681640625
> phase1 -1 ~ -0.026397705078125
> phase1 -1 ~ -0.025970458984375
> phase1 0 ~ 0.0
>
> After short scroll a trackpad behaves as a mouse.
> It is not good, because native list slows scrolling,
> but Swing list scrolls a lot of lines...
>