Re: Add Dragging SC to WCAG 2.2 draft

Hey Alastair,
This doesn't really work yet. A "target" is a "region of the display". How
can a "region of the display" "follow(s) the pointer until the up event"?
The "region of the display" from which you can initiate the drag event
probably stays where it is. There will likely be a visual indication that a
drag is occuring, but it isn't the touch target region that's moving.

As for dragging where the element you're dragging doesn't follow, here's a
small video of the example that came to mind:
https://www.youtube.com/watch?v=yp2V0_XZpFo

Basically, hold down the button at the starting point, move the cursor
while the button is down to draw a ruler which indicates distance, and to
end the measurement you let go of the button. There are lots of other
things you do with this "press down in one place", "move while holding
down", "let go in another place for some effect" type of interactions that
don't involve actually moving some object from one place in the UI to
another.

Another example are games where you use dragging to indicate force and
direction. Many snooker games work like that. You press down on the ball
and you "drag" in the opposite direction you want the ball to move, the
further away you drag, the greater the amount of force you impart on the
ball when you let go.

Hope that helps,

Wilco

On Wed, May 6, 2020 at 10:10 AM Alastair Campbell <acampbell@nomensa.com>
wrote:

> Hi Wilco,
>
>
>
> I’m trying to make some progress on this one, I’ve adjusted the wording
> (thanks Glenda) and made the first use of “target” a link:
>
>
> https://github.com/w3c/wcag/pull/1113/files#diff-8c0e9ad76dafdaba2b22e75a981e0f65
>
>
>
> I didn’t understand your last comment on the game example though, could
> you clarify?
>
>
>
> Kind regards,
>
>
>
> -Alastair
>
>
>
>
>
>
>
> *From:* Alastair Campbell
>
>
>
> Hi Wilco,
>
>
>
> > - In this definition of "dragging movement", does "target" refer to
> "target" as defined in WCAG 2.1. If so, should it be linked to the target
> definition?
>
>
>
> We can link that, it seems like a minor change.
>
>
>
>
>
> > - Also in "dragging movement", what is "directionality at the onset of
> the movement"? Was that added because of my comment on swiping? If so, I
> don't think that actually excludes swiping.
>
>
>
> It isn’t intended to exclude swiping, but to capture things where the
> target goes with the movement. The gesture the user does might be identical
> to a swipe, but it only applies if the target element goes with the pointer.
>
>
>
>
>
> > - Was the intent not to include dragging motions where instead of moving
> the "target" along with the pointer, some other UI indicator was used? For
> example some games when you drag something around will draw an arrow from
> the target to the drop position. The definition of "dragging movement"
> seems to exclude those kinds of drag and drop actions.
>
>
>
> I don’t think I get this, if there is **also** an arrow showing where it
> can go, how does that affect the definition? It applies “until the up
> event", how is the drag & drop affected?
>
>
>
> I also realised I linked up the wrong minutes, sorry, corrected in the PR,
> the latest one was here:
>
> https://www.w3.org/2020/03/24-ag-minutes.html#item02
>
>
>
> Cheers,
>
>
>
> -Alastair
>


-- 
*Wilco Fiers*
Axe for Web product owner - Co-facilitator WCAG-ACT - Chair ACT-R