[Webkit-unassigned] [Bug 99756] New: [Qt] fast/events/touch/touch-slider.html is failing

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=99756

           Summary: [Qt] fast/events/touch/touch-slider.html is failing
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: tony at chromium.org
                CC: hausmann at webkit.org, rjkroege at chromium.org


This started happening after I rewrote RenderSlider to use new flexbox.  After debugging, this is due to a difference between how Chromium and Qt handle eventSender.touch* events.

The problem is that on Qt, calling a eventSender.touch* doesn't send a layout. This matters for fast/events/touch/touch-slider.html because the position of the thumb is set during layout.  If I add document.body.offsetLeft between calls to eventSender.touch*, the test passes.

In Chromium's DRT, we explicitly do a layout before sending the touch event (see bug 49285).  Should we do the same for Qt?

Note that Chromium and Qt are the only ports that have touch events enabled.

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