osx trackpad sends too many events with HTML5 client

[totaam]

Issue migrated from trac ticket # 1390

component: html5 | priority: major | resolution: fixed

2016-12-27 10:08:12: antoine created the issue

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See #1341#comment:15: OSX laptop tracpad events result in dizzyingly & unmanageably fast scrolling (something about the tracpad sending more events with a smaller delta, apparently)

[totaam]

2017-03-10 14:10:02: antoine changed owner from antoine to afarr

[totaam]

2017-03-10 14:10:02: antoine commented

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Tablet devices should be handled much better than before.

We normalize the wheel event values using the facebook code found here: normalizeWheel.js : r15253.
And we try to send one event for each javascript wheel event we receive, unless those are very coarse or fine grained (from a tablet?): r15255.

With debug enabled, the Javascript console shows that on Linux I'm getting a delta of 120 per event with Firefox, and ~156 for google chrome..
We'll be able to handle this a lot better once we implement extended input device support (#173)

Links:

• javascript wheel events documentation
• wheel delta test page

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@afarr: I don't have the required hardware to test.

[totaam]

2017-07-20 01:51:58: afarr changed status from new to closed

[totaam]

2017-07-20 01:51:58: afarr set resolution to fixed

[totaam]

2017-07-20 01:51:58: afarr commented

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Testing against a fedora 25 2.1 16421 server, with OSX 10.12 laptop (with tracpad) using chrome 57 (still running old version in case of need to test some more certs?).

Tracpad behavior is very well handled. Couldn't tell any difference in scrolling handling vs. a mouse with a windows 7 html5 client.

I do notice some tearing/'striping' at times when scrolling though (I know, for another ticket) as well as an issue when I hit a ping timeout and the client reconnected - it ran into 'invalid packet type' error (already made #1586 for this issue).

This one looks good though. Closing.