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Re: Sliders and MouseDown

for

From: Isabel Holdsworth
Date: Mar 1, 2019 4:48AM

I think there are going to be a lot of essential exception claims for
this one. I might as well start the ball rolling ...

On 01/03/2019, Detlev Fischer < <EMAIL REMOVED> > wrote:
> While the mouse is down and the slider is moved, it should certainly
> already update the value so in case of a volume control the user has
> immediate feedback. There is nothing wrong with immediately updating the
> values anyway (not just when this is essential) - the point is that the
> release of the mouse button /finger lift-off ouside the active area of
> the slider (which should certainly be wider than a couple of pixels)
> should revert the thumb to the original position. When this does not
> happen, my hunch is that the control would need to claim an essential
> exception (which might be OK for volume as it is easily revertable).
> Taking the videoexample, the situation is perhaps more tricky - you
> definitely need feedback / change of position values while dragging
> here. Reverting to the old position when releasing the mouse outside the
> track area does not seem to be the common behaviour (just checked
> YouTube, Vimeo and a few other players). The exact old position in the
> video will be difficult to locate without the thumb reverting. I guess
> such a behaviour would have benefits but probably also downsides, so I
> would feel inclined to accept an essential exception for video track
> sliders.
> Detlev
>
> Am 01.03.2019 um 11:30 schrieb Isabel Holdsworth:
>> Very good points Glen - thank you. I think I could easily pass these
>> under the "essential" criterion. I predict a happy customer moment :-)
>>
>> Thanks all.
>>
>> On 01/03/2019, glen walker < <EMAIL REMOVED> > wrote:
>>> I don't like the slider *not* updating as it's being dragged. Whether
>>> for
>>> volume, or a seek bar, or for a color change. For the latter, see
>>> WebAIM's
>>> contrast checker,
>>> https://webaim.org/resources/contrastchecker/#maincontent.
>>> If you're a mouse user, you can drag the slider for the color and see the
>>> color box change and the pass/fail options update. As a keyboard user, I
>>> can use left/right arrows to see the changes. If you press and hold an
>>> arrow key, it's kind of like dragging the slider, except you can't
>>> escape/undo it. On firefox, I can hit escape while dragging with the
>>> mouse
>>> and it'll cancel the change. Neither chrome nor IE support that.
>>>
>>> Keep in mind that 2.5.2 has a list of "at least one of the following is
>>> true". The canceling of the mouse drag is just one of them. If you
>>> don't
>>> support canceling, then perhaps you can satisfy one of the others. In
>>> the
>>> case of a volume or seek or color bar, I would argue that the fourth
>>> bullet
>>> point applies - "Essential: Completing the function on the down-event is
>>> essential". Allowing the user to hear the volume change as you're
>>> dragging
>>> could be considered "essential". Seeing a color box change and pass/fail
>>> options update could be considered "essential". It might be a subjective
>>> argument, but that's nothing new.
>>>
>>> Glen
>>> >>> >>> >>> >>>
>> >> >> >> >
> --
> Detlev Fischer
> Testkreis
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