On 2014-10-29 08:25, Gavin Lambert wrote:
>> Just out of curiosity, but what's that context where zoom gesture not
>> working is a good thing?
> 
> It's a kiosk app that displays a full-screen page (mostly consisting of an 
> SVG image viewboxed to fit the screen, but there's some HTML content too), 
> with scrollbars disabled.  Zooming causes the HTML parts to not display as 
> intended, although it leaves the SVG alone.  And the target audience isn't 
> expected to know how to unzoom -- zooming would be presumed to be accidental 
> rather than intentional (eg. as a result of two different people touching the 
> screen at once).
> 
> I suppose we could just tell everyone to get single-touch screens but for 
> some reason the multi-touch ones are cheaper now.
> 
> And I doubt this use-case is unique -- there are a lot of touch-maps, info 
> kiosks, ticket kiosks, and interactive ad-screens popping up in malls and 
> airports etc.

+1, I'm maintaining a similar kiosk app where everything but single taps
(even drag and drop) is disabled to prevent users from (accidentally or
intentionally) messing with the page layout.

We're still using single-touch panels though, would it be
possible/useful to disable multi-touch on the driver/X11 level for this
use case?

>>> (FWIW, tap and drag already worked with the touchscreen that I'm
>>> using.
>>
>> Tap and drag work in WebKit1 using a recent enough GTK+ version, because
>> those features are implemented by GtkScrolledWindow.
>>
>>>   Although oddly right-click via EmulateThirdButton appears to have
>>> stopped working somewhere between 1.8.1 and 2.4.5, but as this was
>>> also Debian wheezy => jessie the fault may lie elsewhere.)
> 
> If it helps, GTK+ went from 2.24.10 to 2.24.24.
> 
> 
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-- 
Mit freundlichen Grüßen, / Best Regards,
Sven Schwedas
Systemadministrator
TAO Beratungs- und Management GmbH | Lendplatz 45 | A - 8020 Graz
Mail/XMPP: [email protected] | +43 (0)680 301 7167
http://software.tao.at

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