On Monday, July 14, 2014 5:40:58 PM UTC-4, Adrian Custer wrote: > On 7/14/14, 5:34 PM, [email protected] wrote: > > > Related to this bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1038045 > > > > > > Basically, on my ZTE Open under FFXOS v2.1, multitouch only sort of works. > > > > > > What this means is that multitouch only registers discrete inputs when > > there is a large Y-Axis (taken from phone's "normal" portrait orientation) > > delta between the two fingers. > > > > > > If the Y-Axis delta approaches zero, FFXOS seems to average the location of > > the two inputs into some intermediate point. > > > > > > See this video for a demonstration of this behavior: > > > http://youtu.be/n9cVHCBHuYY > > > > > > Furthermore, the ZTE Open under FFXOS v2.1 seems unable to register more > > than 2 discrete inputs, likely due to the above issue with the Y-Axis delta. > > > > > > This bug severely limits the number and kind of gestures the ZTE Open can > > support under FFXOS, and makes even the stock gestures usable in only very > > specific circumstances. > > > > > > For instance, as in this bug, > > https://bugzilla.mozilla.org/show_bug.cgi?id=1037894 , the Pinch to Zoom > > gesture will ONLY work when the device is in Normal Portrait, or inverted > > Portrait orientation. > > > Video of this behavior: https://www.youtube.com/watch?v=kgaUxMYGOvs > > > > > > So, what I'm asking for is if anyone would be willing to test out this app > > & report back to me: > > > https://marketplace.firefox.com/app/multitouch-detect > > > > > > I need three things: > > > > > > 1) Device Name & FFXOS version > > > > > > 2) How many fingers (max) it could detect > > > > > > 3) Whether or not two fingers side-by-side (Y-Axis delta =ish 0) registers > > discrete or "averaged" input > > > > > > I'm curious if this is only a ZTE Open issue, or only a v2.1 master issue, > > or what, and Gabriele would like some further info/clarification on what > > devices/OS versions are impacted. > > > > > > Thanks all! > > > _______________________________________________ > > > dev-b2g mailing list > > > [email protected] > > > https://lists.mozilla.org/listinfo/dev-b2g > > > > > > > Hey, > > > > Have not yet tried your app but I wrote something similar when I was > > working with multi-touch. > > > > On the Alcatel One Touch Fire (aka hamachi) device, my conclusion was > > that we were working with very limited hardware. While debugging my > > multi-touch library, it became apparent that a simple pinch would not be > > recognized correctly. As the fingers pinched, the device might decide > > that a finger had been removed, then that it had returned to the > > surface, then that it had been removed... It became apparent that > > providing a reliable experience on unreliable hardware was going to take > > a bunch of work. So I have left off that for lower hanging fruit. > > > > Also, on that device, multi-touch is limited to two. I have never seen a > > third touchstart event after two earlier touchstart events with no > > touchleave in between. I filed a bug wanting information about my code > > (i.e. if it were my code or my hardware) but have not yet gotten any > > help or comments on that bug. > > https://bugzilla.mozilla.org/show_bug.cgi?id=951163 > > Attached to the bug, you can find my test application that merely logs > > what events the app happens to receive as you move your fingers around. > > > > cheers and good luck, > > ~adrian
Thanks for the info Adrian. That isn't my app, but merely the only thing that showed up in the marketplace when I searched for "multitouch". So it appears from what you're saying that the Hamachi acts similar to the ZTE Open in terms of multi-touch detection. This could indicate a software/driver issue, unless the two devices use the same screen/controller. Could you test it in the manner I do in the two videos to see if it is the same Y-Axis delta issue that I see on the ZTE Open, or some other issue entirely? Thanks, Brett _______________________________________________ dev-b2g mailing list [email protected] https://lists.mozilla.org/listinfo/dev-b2g
