Various touch issues with libcosmic apps

[Quackdoc]

A grouping of various touch issues some of which may stem from the same issue

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Cosmic store:

Touch: Events are triggered on wl-touch down events not wl-touch up events

originally reported https://github.com/pop-os/cosmic-store/issues/70

With cosmic store, touch seems to work fine except for that "pressing" an entry triggers it, not after releasing, this means you

A) cannot long press, which probably isn't super relevant since there is no context menu B) cannot scroll unless you have enough space to the side

Behavior should be; on down, on up = trigger entry on-press, on motion, on up move the screen, do not trigger entry

motion needs to have some kind of distance buffer since sensitive touchscreens can report very small motions not intended to be touch drag events. a short time stamp but a long motion should be interpreted as a drag and a long time but short motion should be a long press or a context click.

Cosmic-files has in some cases the same issues https://github.com/pop-os/cosmic-files/issues/62

Other issues: cannot flick with tap and drag scrolling

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Cosmic Files:

Originally reported: https://github.com/pop-os/cosmic-files/issues/62

• cannot tap options aside from the directories in the left side bar
• Scroll only works when you initially tap a blank area
• long press file to open context menu would be nice
• dragging the scroll bar is choppy (this may be an issue with my display since it doesn't have the best calibration, but a larger touch area may be better)

Other issues:

Dragging on free space will create a selection box instead of scrolling page.

[Doublonmousse]

It seems that appmenu items (like file > save or view> about) can't be clicked with touch inputs

[mmstick]

Touch is a work in progress