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Re: Time-out modal with alertdialog

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From: Bryan Garaventa
Date: Jul 6, 2015 10:09AM

That's true, one thing to note though, if the browser is firing a system alert and the AT is processing that properly, then it should be interrupting speech regardless.

If they change the attributes with role=alert on the container and add the dialog container element to that, I'm curious to know what the outcome is for them in Firefox for example where this is working correctly.


-----Original Message-----
From: WebAIM-Forum [mailto: <EMAIL REMOVED> ] On Behalf Of Moore,Michael (HHSC)
Sent: Monday, July 06, 2015 6:34 AM
To: WebAIM Discussion List
Subject: Re: [WebAIM] Time-out modal with alertdialog

This is very likely because both screen readers are reading from a virtual buffer when in say all mode. The screen reader is going to read to the end of the buffer before adding any more content. The good news is that I have not observed any actual screen reader users working with a web application in say-all mode.

Mike Moore
Accessibility Coordinator
Texas Health and Human Services Commission Civil Rights Office
(512) 438-3431 (Office)
(512) 574-0091 (Cell)

-----Original Message-----
From: WebAIM-Forum [mailto: <EMAIL REMOVED> ] On Behalf Of Sean Keegan
Sent: Sunday, July 05, 2015 11:39 PM
To: <EMAIL REMOVED>
Subject: Re: [WebAIM] Time-out modal with alertdialog

Hi Bryan,

Thanks for replying. I did some further investigation with aViewer and tracked how both NVDA and JAWS were responding. Using aViewer I watched for what happens when the time out modal happens and the alertdialog role is indeed triggered, so it is registering in the various interfaces.

Best I can tell, this may be the result when using this specific reading command. Using NVDA with the Say All command, I found there is about a 40 second delay between when the time out modal happens and NVDA communicates the alert even though the alert is recognized in aViewer when it happens.
Unfortunately, using JAWS with Say All command, does not communicate anything about the presence of the alertdialog when it happens resulting in the application automatically closing the session after the time out period elapses.

I will suggest modifying the attributes on the parent Div and containers to see what happens. With NVDA, there is the notification, but it can take 40 seconds for this to be communicated during this specific type of reading/navigation.

Thanks for the info regarding the tabindex. I have found instances of positive tabindex values in the application and suspect tabindex=0 was included to force the focus. Lots to work on...

Take care,
Sean


From: Bryan Garaventa < <EMAIL REMOVED> >
> To: "'WebAIM Discussion List'" < <EMAIL REMOVED> >
> Cc:
> Date: Fri, 3 Jul 2015 16:31:16 -0700
> Subject: Re: [WebAIM] Time-out modal with alertdialog Technically the
> alertdialog role should fire a system alert when the container is
> added to the DOM via element.appendChild/replaceChild or
> element.innerHTML, or when switched into visibility by changing
> display:none to 'block' or 'inline'.
>
> This might not be working properly though.
>
> Try putting role="alert" on the parent Div, and change the dynamically
> added container from role="alertdialog" to role="dialog" and see what
> happens when this is added to the Alert container element.
>
> It will be important to set all of the required attributes however,
> such as those documented at
> http://whatsock.com/training/matrices/#dialog
> And to follow the correct setting of focus when it opens.
>
> There is no need to set tabindex="0" on the parent Dialog container,
> since it's the active elements within that should be focusable. E.G
> the OK button or whatever. If you need to set focus to a Dialog
> container, it works better to use tabindex="-1", then manage focus
> using forward and reverse circular tabbing within the dialog from that point on.
>
> Hopefully this helps a bit.
>
> Best wishes,
> Bryan
>
> -----Original Message-----
> From: WebAIM-Forum [mailto: <EMAIL REMOVED> ] On
> Behalf Of Sean Keegan
> Sent: Friday, July 03, 2015 12:57 AM
> To: <EMAIL REMOVED>
> Subject: [WebAIM] Time-out modal with alertdialog
>
> I am working on a time-out modal that is triggered after 10 minutes of
> no activity within an application. There is an empty parent <div> into
> which the time out modal is loaded when the time limit is triggered.
> This modal is comprised of a descendent <div> with role=alertdialog and tabindex=0.
>
> During testing, I noticed JAWS and NVDA will announce the modal window
> if focus is on an input field, the user is typing, or if there is no
> activity by the user when the time period elapses. However, if
> navigating the page using the virtual buffer commands (such as a Say
> All), there is no notification to the user by the screen-reader that
> the modal has been triggered.
>
> A colleague and I are debating the role=alertdialog and if there may
> need to be a more assertive notification when the time out modal is triggered.
> Would adding aria-live=assertive to a <div> that already contains
> role=alertdialog be redundant or should the aria-live property be
> applied to the parent <div> so that it can monitor all descendents?
>
> Take care,
> Sean
> > > archives at http://webaim.org/discussion/archives
> >