[gestures] swipe is too sensitive, makes long-press difficult

[Michael Hall]

Activating the long-press event on the Dash is often difficult, because the slightest amount of movement will turn it into a swipe event. Especially when operating the device one-handed, it's very hard to keep your thumb still enough to activate the long-press.

Can we allow some about of "wiggle room" so that a swipe isn't a swipe unless it's moved some reasonable distance?

[Michał Sawicz (saviq)]

Related to bug #1152150 - generally movement detection in Qt is pretty strict, and there's no built-in mechanisms to change that. Completely agree with the bug, though.

[Vesa Rautiainen (vesar)]

I agree this is one of the most annoying issues with our OS. This same over sensitivity is present in Launcher as well when trying to long press to organize items or to open the quicklist menu.

Do we already set QApplication::setStartDragDistance() explicitly or are we using platform default value for drag threshold (whatever that value in Ubuntu would be) ? Increasing this value should do the trick right?

[Vesa Rautiainen (vesar)]

I guess other option would be to create our own UbunuFlickable that inherits Flickable (or uses it as a root element) and where we would have a Mouse area inside Flickable detecting mouse movements and changing flickable interactive property accordingly. Though this should be doable it also sounds just so much more hackish solution that I would try first increasing the startDragDistance value.

[kevin gunn (kgunn72)]

so is this bug really unity8 at all ? or is it against Qt in spirit ?

[Michał Sawicz (saviq)]

Yeah, nothing special we can/should do "downstream". The drag distance Vesa mentioned is only for drag'n'drop operations, won't help in the flickable use case.

There are however patches attached to the related QTBUG https://bugreports.qt-project.org/browse/QTBUG-35608 which would allow the QPA plugin to change the startFlick distance.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.