Re: Pointer Events 2 results

Regarding the tangentialPressure and twist what Patrick sees is indeed a
bug in Chrome. A few months ago we switched the behavior of the pen in
Chrome to do scrolling when touching the screen on Windows to match the
platform behavior. That change caused a few bugs including this twist
tangentialPressure.
More precisely when you touch the screen we changed the routing of the
events in Chrome which is the situation that you see the bug. Note that
tangentialPressure itself is always zero I believe when hovering similar to
pressure. We are going to fix this soon. As a side note both of these
attributes work just fine on Mac currently.

As far as the testing is concerned, you are correct that we don't have
tests to check the values of pressure, twist, and tangentialPressure. I
believe we wanted to avoid tying the tests to devices too much as some
devices just don't support some of these attributes. For example if you
only have a symmetric tip for Wacom it only reports zero for twist. So it
would make such a test that checks for different values of twist that much
harder to run. I'm hoping to address these issues in our automated APIs for
input injection so we can add all these sort of tests.


On Tue, Jul 10, 2018 at 3:57 PM Philippe Le Hégaret <plh@w3.org> wrote:

>
>
> On 7/10/2018 11:16 AM, Navid Zolghadr wrote:
> > Awesome. Thanks Philippe for taking the time and run the tests on all the
> > browsers. I have done it for Chrome in the past and I know it is such a
> > pain.
> >
> > I also want to mention that we have some tests that pass with different
> > pointer types (like with both touch and mouse) but they output different
> > test names which caused more tests in the less-than-2 bucket. So not the
> > best test suite here :).
>
> Yes, I didn't look into the tests themselves since I was simply focusing
> on getting some results. I can attempt to propose some improvements but
> not sure when I would get to it yet.
>
> >
> > Note that some of them are tricky to run. For example
> >
> http://www.w3c-test.org/pointerevents/pointerevent_pointerleave_pen-manual.html
> > you
> > need to leave the pen from the range of the digitizer while you are still
> > keeping the pen on top of the element. If you just leave it from the
> > boundaries it would fail. I brought this up because I just tested this
> > single one on Edge, Chrome and FF on a surface tablet with its own pen
> and
> > also external Wacom and both Chrome and Edge passed even though the test
> is
> > listed in less-than-2
> > <http://w3c.github.io/test-results/pointerevents/less-than-2.html>. Note
> > that Firefox still didn't pass it.
>
> Feel free to update the results. It is indeed tricky to run some of them.
>
> > There are a few tests like the one above. Aside from those there are some
> > tests that we punted on like
> >
> http://www.w3c-test.org/pointerevents/pointerevent_click_during_capture-manual.html
> > as
> > currently browsers don't agree on a behavior and we tried it once to spec
> > it consistently with other behaviors but after Chrome implemented the new
> > behavior it caused some compat issues and we had to revert it. So we
> agreed
> > to address it later V3. Not sure where to put these sort of tests for
> now.
> > Should we just leave it there in the main directory and keep a list?
>
> Yes. The tests should definitively stay but we could remove them from
> the report in the meantime (using filter.js). Do you/can you have a list
> of the tests to remove from the report?
>
> Note that Patrick main concern is on twist and tangentialPressure. We
> don't have test (besides IDL ones) and it doesn't look like we have
> enough implementation...
>
> As a side, I did some musing around UI events today:
>    https://www.w3.org/2018/07/uievents.html
>
> You can limit this to Pointer Events only:
>    https://www.w3.org/2018/07/uievents.html?filterTypes=pointer
>
> Philippe
>
> >
> >
> > On Tue, Jul 10, 2018 at 5:45 AM Patrick H. Lauke <redux@splintered.co.uk
> >
> > wrote:
> >
> >> Folks, Philippe has kindly helped with trying to run the tests/compile
> >> results. However, there seem to be some gaps here with browser support.
> >> It would be REALLY good if you could check/clarify what the current
> >> state of these things is, if possible?
> >>
> >> Currently, our progression with the spec along the W3C track is likely
> >> stalled and we may have to see if we can get a further extension of the
> >> charter, but only if there's still activity/interest in carrying on.
> >>
> >> On 09/07/2018 18:44, Philippe Le Hégaret wrote:
> >>   > (feel free to forward this message to a public place if needed)
> >>   >
> >>   > I ran all of the tests the best I was able to:
> >>   > http://w3c.github.io/test-results/pointerevents/all.html
> >>   >
> >>   > I ended up with a 4.42% failure level:
> >>   > http://w3c.github.io/test-results/pointerevents/less-than-2.html
> >>   >
> >>   > The subtest names aren't consistently generated. It affects most
> >>   > pointerevent_attributes_hoverable_pointers-manual.html and
> generates a
> >>   > semibogus report consequently.
> >>   >
> >>   > I also suspect some of the tests to potentially have some browser
> >>   > specific quirks/behaviors (eg
> >> pointerevent_pointerleave_pen-manual.html).
> >>   >
> >>   > Focusing on Pointer Events 2 additions:
> >>   >
> >>   > - We don't have much test for tangentialPressure and twist. I also
> don't
> >>   > have a device that makes use of those so I wasn't able to test these
> >>   > twos. Both chrome and Firefox claims to support however as shown in
> the
> >>   > tests
> >>
> >> As I have some devices, I suggested that I could help out with some of
> >> the pen testing.
> >>
> >> On 09/07/2018 19:58, Philippe Le Hégaret wrote:
> >> [...]
> >>> Can you generate non-zero values for tangentialPressure and twist in
> the
> >>> following pointer events monitor:
> >>> https://www.w3.org/2018/07/pointerevents.html
> >>
> >> Ok, tried those using my Wacom Intuos S under Win 10 - the art pen/felt
> >> pen has a twist sensor, and the airbrush pen has an additional wheel
> >> that's supposed to work as tangential/barrel pressure setting.
> >>
> >> Results so far:
> >>
> >> * Edge doesn't seem to have implemented twist nor tangentialPressure
> >> support at all - the properties are missing in generated pointer events;
> >> they attributes thankfully are present in Chrome and Firefox.
> >>
> >> * Chrome correctly supports twist (turning the art pen along its axis /
> >> rolling it between my fingers gives me values from 0-359); one oddity is
> >> that this only works when the pen is hovering over the digitizer surface
> >> - as soon as I set the pen down on the digitizer surface, twist resets
> >> to zero and doesn't react to any pen rolling. As I see this also
> >> apparently happening when I'm using Photoshop and the Wacom, I suspect
> >> this MAY be hardware-based limitation (similar to something like palm
> >> rejection), but can't be sure without having a way to see the actual
> >> data/values passed from the hardware/the system API.
> >>
> >> * Although Chrome does have the tangentialPressure property, but I can't
> >> seem to get any value other than zero when using the airbrush pen. Not
> >> sure if this is something to do with a bug/imperfect implementation in
> >> Chrome, or perhaps the driver software for the Wacom. I did manage to
> >> check that the wheel on the airbrush does indeed work in Photoshop, but
> >> the way it works maybe is unusual: turning the wheel itself doesn't seem
> >> to change anything directly, but the position of the wheel does
> >> influence other aspects once the pen clicks/touches the digitizer. So
> >> for instance, setting up Photoshop correctly, I can use an airbrush
> >> tool, and while the pen touches the digitizer/presses down, I can use
> >> the wheel to determine the strength of the pressure (see
> >> https://www.youtube.com/watch?v=t85gxJTN_MQ for instance). Not sure how
> >> this is reflected in terms of values passed on via the hardware/system
> >> API though...wondering if Chrome expects values to come in a certain
> >> way, but instead they're only generated in some other way? Or the
> >> plumbing just isn't connected behind the scenes?
> >>
> >> * Firefox's PE implementation seems a bit broken still. I noticed, for
> >> one, that hovering a pen/stylus over the digitizer works correctly (and
> >> the pointer is identified as as hovering "pen"), but as soon as the pen
> >> touches the digitizer it's all of a sudden reported as "touch". The
> >> pressure attribute doesn't seem to change either. This happened both
> >> when testing the Wacom and the basic stylus on Surface 3.
> >>
> >> * In Firefox, both twist and tangentialPressure are present but remain
> >> zero.
> >>
> >> P
> >> --
> >> Patrick H. Lauke
> >>
> >> www.splintered.co.uk | https://github.com/patrickhlauke
> >> http://flickr.com/photos/redux/ | http://redux.deviantart.com
> >> twitter: @patrick_h_lauke | skype: patrick_h_lauke
> >>
> >>
> >
>
>