Re: Hover click with pointer events

On Tue, Jun 16, 2015 at 10:23 AM, Patrick H. Lauke <plauke@paciellogroup.com
> wrote:

> On 16/06/2015 17:42, Rick Byers wrote:
>
>> Button #0 is defined
>> <http://www.w3.org/Submission/pointer-events/#button-states> as the 'pen
>> contact' button, right?  It seems we have at least the following two
>> choices:
>>
>> 1) Allow firing pointerup / pointerdown for pen outside of contact
>> scenarios.  Eg. redefine button #2 to be just "barrel button" (instead
>> of "pen contact with barrel button pressed).  This seems like it's
>> probably bad for web compatibility and might make it harder for
>> developers to do common things.
>>
>
> The "barrel button" is supposed to be equivalent to right-mouse/context
> menu. As such, when pressed in the air, it should just fire pointermove (as
> per spec) and click, rather than pointerup / pointerdown.
>

Same for any "left-mouse button" type buttons (Surface Pen lacks this - it
> only has barrel, erase, and the non-remappable Microsoft OneNote one at the
> top
> https://www.microsoft.com/surface/en-gb/support/touch-mouse-and-search/surface-pen
> - but Wacom Bamboo does have it - left-click, right-click, erase
> http://us.wacom.com/~/media/WTC/Files/Manuals/Legacy/Bamboo%20Pen%20Bamboo%20Touch%20Bamboo%20Fun.pdf/
> (p 43)). Fire pointermove and click.
>
>  2) Allow the 'buttons' state to change while hovering.  Apps that wanted
>> to support "hover click" would need to watch pointermove for changes in
>> buttons.  This is a little more awkward, but it's a pretty special case
>> anyway that I doubt most developers would ever want to support.  So I'm
>> OK with it being more difficult.
>>
>
> For left-mouse button and right-mouse button / activation and barrel, and
> possibly also for erase, would devs also be able to just listen for click
> as usual? (not tested, but: does click in theory also have the same
> button/buttons that you'd get from listening to pointermove instead?)


Do we really want to fire 'click' without pointerup/pointerdown?  Would
that be web compatible?  I was arguing that we wouldn't fire anything other
than pointermove here...



>
>
> P
> --
> Patrick H. Lauke
> --
> Senior Accessibility consultant
> The Paciello Group (UK office)
> http://www.paciellogroup.com
>
>