Oh, I should also mention that currently many (if not all) Windows touchscreen devices have e10s disabled by default, because a touchscreen seems to trigger the accessibility code which disables e10s. And if e10s is disabled, APZ is disabled, which means no APZ touch scrolling. If you encounter bugs in this configuration, again, please file. If you want to force-enable e10s (and therefore APZ), you can set the browser.tabs.remote.force-enable pref to true.
On Mon, Feb 1, 2016 at 12:46 PM, Kartikaya Gupta <kgu...@mozilla.com> wrote: > In bug 1180706 I turned on the dom.w3c_touch_events.enabled pref for > Windows desktop builds. This should be in Jan 31 nightly. For devices > that have touchscreens, this has two effects: > > 1) Touch scrolling now uses APZ. The physics will probably need some > tuning, but if you see correctness issues with scrolling, tapping, > long-tapping, etc., please file a bug and cc me. Pinch zooming is > currently disabled. > > 2) Web content will be receiving touch events. This may result in > pages responding very differently when using touch to interact with > it. Pages may also do different things on load, because they can > detect the presence of touch interfaces via window.Touch and > window.TouchEvent which wasn't the case before. If you observe > strange/buggy behaviour on touchscreen windows devices that wasn't > there before, try setting dom.w3c_touch_events.enabled to false > (restart required) to confirm it was caused by this change, and please > file a bug and cc me if so. > > For the moment this change will remain on Nightly until we are > confident that it doesn't break anything major. > > Note also that touch event support has been enabled on Linux for a > while now (not just Nightly) although you need MOZ_USE_XINPUT2=1 in > the environment for it to work. If you have a Linux touchscreen device > please feel free to try it out there as well and file bugs if you > encounter any problems. > > Thanks! > kats _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
