726608 - (Win7 desktop) touch event handlers registered after delay do not fire until you ALT-TAB out and back into browser

Status: RESOLVED WORKSFORME

(Core :: DOM: Events, defect)

Description

[brandon.wallace]

Attachment: moztouchbug.htm

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.874.121 Safari/535.2

Steps to reproduce:

Windows 7 with a touch screen.  Issue exists in Firefox6+, including Nightly (13.0a1 2012-02-12)

setTimeout(function() {
  document.body.addEventListener("MozTouchDown", function(ev) { ... });
  document.body.addEventListener("mousedown", function(ev) { ... });
}, 1000);



Actual results:

The MozTouch* event handler will not fire when I touch the the document.    However, the mousedown event will still fire with the "fake" mouse event (mozInputSource===5).

If I ALT-TAB out of the browser and ALT-TAB back in, then I the MozTouchDown event correctly fires as I touch the screen.

You can repeat this by pressing CTRL-F5.  Touch screen will not trigger the MozTouch* events.  ALT-TAB, ALT-TAB, touch screen now triggers the MozTouch events.

If I change the setTimeout to have a 0 delay, then everything works correctly.

Here is a jsFiddle exhibiting the issue: http://fiddle.jshell.net/ScjXX/show/light/
(note that the bug only occurs if the code is not loaded within an iframe)


Expected results:

MozTouch events should fire without needing to switch window focus.

Comment 1

[Kartikaya Gupta (email:[e-mail])]

Attachment: Version with touchstart/touchend

MozTouch is no longer a thing, touchstart/touchend are the new standard events. The attached test case is a modified version of the original test case that uses these standard events, and it works as expected on a Windows nightly build with touch enabled.