With b2g18 B2G Desktop/Mac build on 10 Jan and latest Gaia, the homescreen not swipe-able; nor clickable, quick settings is not clickable I have not look into the cause yet, however this will block the Firefox App Day event given the fact that people basically will not be able to launch app. The latest OS Simulator dates 26 Dec, and is not affect by this bug (yet). I suspect it was because bug 823619 but I was wrong, commit 97cdcec still works. Need a regression window and a fix.

That's because all the mouse events are discarded, please check the following codes in the shared/js/mouse_event_shim.js: // Use capturing listeners to discard all mouse events from gecko window.addEventListener('mousedown', discardEvent, true); window.addEventListener('mouseup', discardEvent, true); window.addEventListener('mousemove', discardEvent, true); window.addEventListener('click', discardEvent, true);

(In reply to Pin Zhang [:pzhang] from comment #1) > That's because all the mouse events are discarded, please check the > following codes in the shared/js/mouse_event_shim.js: > // Use capturing listeners to discard all mouse events from gecko > window.addEventListener('mousedown', discardEvent, true); > window.addEventListener('mouseup', discardEvent, true); > window.addEventListener('mousemove', discardEvent, true); > window.addEventListener('click', discardEvent, true); Yeah you are right, commit 0a66aae is broken and commit 97cdcec works. But Quick Settings still works in commit 0a66aae though. Could be separate issues. djf, what do you think wd could fix this w/o breaking the phone?

We specifically tested desktop builds with the shim. It doesn't even attempt to hook mouse events when touch events aren't available. (I wrote that patch! ;) ) Something (else) might have regressed this though.

The "doesn't event attempt" code that Chris is referring to is this in mouse_event_shim.js: // Bail if we're not on running on a platform that sends touch // events. We don't need the shim code for mouse events. try { document.createEvent('TouchEvent'); } catch (e) { return; } When 823619 landed, that code executed the return on desktop. If that has changed for some reason, then it is the shim that is eating events and breaking things, and we'll need another way to distinguish the desktop case.

http://mxr.mozilla.org/mozilla-beta/source/b2g/app/b2g.js#289 Thanks for the info. I thought we still have touch events turned on on B2G Desktop...

Taking, so I would remember to investigate further.

Forcing a return in mouse_event_shim.js (rather than relying on the touch event exception) does not fix the issue for me.

Homescreen no longer uses the shim. I has been ported to use touch events. So if it is broken it is because we don't have touch events on the desktop!

I have added mouse support to homescreen