This bug was fixed in the package webbrowser-app -
0.23+16.04.20160509.3-0ubuntu1
---------------
webbrowser-app (0.23+16.04.20160509.3-0ubuntu1) xenial; urgency=medium
[ CI Train Bot ]
* Resync trunk.
[ Olivier Tilloy ]
* Fine-tune the custom memory-pressure handler, from data gathered on
several devices. (LP: #1576639)
* Update translation template.
-- Olivier Tilloy <olivier.til...@canonical.com> Mon, 09 May 2016
17:56:03 +0000
** Changed in: webbrowser-app (Ubuntu)
Status: Invalid => Fix Released
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https://bugs.launchpad.net/bugs/1459362
Title:
SwipeArea lets touch events through before a drag is detected
Status in Oxide:
Fix Released
Status in ubuntu-ui-toolkit package in Ubuntu:
Invalid
Status in webbrowser-app package in Ubuntu:
Fix Released
Bug description:
I recently build a branch of lp:webbrowser-app with the latest code
drop for DirectionalDragArea from lp:unity8. The branch is there:
lp:~osomon/webbrowser-app/update-dda.
The DDA is used to detect a bottom edge drag over a WebView component,
and display the tabs view accordingly. This works well, but often when
a drag is detected the WebView under it gets a long press event, thus
triggering the selection mechanism that it implements.
According to Daniel with whom I discussed the issue prior to filing
this bug:
> Yes, the recognition parameters (and algorithm) were changed a bit.
> So it's perfectly possible that what you consider a long press (don't
> know how many milliseconds of pressed are needed for that) can happen
> before the DirectionalDragArea reaches a decision on whether the gesture
> is a directional drag gesture or not.
The threshold duration for a long press to be detected by the WebView
is 500ms.
I’ve rebuilt my branch with DIRECTIONALDRAGAREA_DEBUG set to 1, and
here is what I’m seeing when observing the issue:
[DDA()] 10035 TouchBegin (id:8, state:pressed, scenePos:(268.503,917.002))
[DDA()] WaitingForTouch -> Undecided
[DDA()] Unowned 10072 TouchUpdate (id:8, state:moved,
scenePos:(268.503,917.002))
[DDA()] Sill within composition window. Let's wait more.
[DDA()] Unowned 10089 TouchUpdate (id:8, state:moved,
scenePos:(268.503,917.002))
[DDA()] Sill within composition window. Let's wait more.
[DDA()] Unowned 10106 TouchUpdate (id:8, state:moved,
scenePos:(268.503,917.002))
[DDA()] movedFarEnoughAlongGestureAxis: scalarProjection=0,
distanceThreshold=15.748
[DDA()] Didn't move far enough yet. Let's wait more.
[DDA()] Unowned 10123 TouchUpdate (id:8, state:moved,
scenePos:(267.006,911.008))
[DDA()] movedFarEnoughAlongGestureAxis: scalarProjection=2.05677,
distanceThreshold=15.748
[DDA()] Didn't move far enough yet. Let's wait more.
[DDA()] Unowned 10139 TouchUpdate (id:8, state:moved,
scenePos:(267.505,891.706))
[DDA()] movedFarEnoughAlongGestureAxis: scalarProjection=21.3591,
distanceThreshold=15.748
[DDA()] grabbing touch
[DDA()] Undecided -> Recognized
[DDA()] 10150 TouchUpdate (id:8, state:moved, scenePos:(267.505,891.706))
[DDA()] 10186 TouchUpdate (id:8, state:moved, scenePos:(268.503,845.866))
[DDA()] 10215 TouchUpdate (id:8, state:moved, scenePos:(270.853,799.68))
[DDA()] 10238 TouchUpdate (id:8, state:moved, scenePos:(271.996,774.151))
[DDA()] 10248 TouchUpdate (id:8, state:moved, scenePos:(272.212,747.697))
[DDA()] 10260 TouchUpdate (id:8, state:moved, scenePos:(274.196,721.618))
[DDA()] 10288 TouchUpdate (id:8, state:moved, scenePos:(275.736,663.346))
[DDA()] 10345 TouchUpdate (id:8, state:moved, scenePos:(278.203,582.836))
[DDA()] 10465 TouchUpdate (id:8, state:moved, scenePos:(280.481,432.403))
[DDA()] 10483 TouchUpdate (id:8, state:moved, scenePos:(281.486,382.402))
[DDA()] 10501 TouchUpdate (id:8, state:moved, scenePos:(282.613,359.847))
[DDA()] 10522 TouchUpdate (id:8, state:moved, scenePos:(283.838,335.342))
[DDA()] 10532 TouchUpdate (id:8, state:moved, scenePos:(284.972,311.133))
[DDA()] 10545 TouchUpdate (id:8, state:moved, scenePos:(286.124,288.236))
[DDA()] 10590 TouchUpdate (id:8, state:moved, scenePos:(287.307,265.747))
[DDA()] 10600 TouchUpdate (id:8, state:moved, scenePos:(288.466,228.588))
[DDA()] 10601 TouchEnd (id:8, state:released, scenePos:(288.466,228.588))
[DDA()] Recognized -> WaitingForTouch
Let me know if I can provide more useful information.
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