[jawsscripts] Re: PS further thoughts on my last, was optimal ScreenStabilizedEvent usage?

  • From: Andrew Hart <ahart@xxxxxxxxxxxxx>
  • To: jawsscripts@xxxxxxxxxxxxx
  • Date: Mon, 05 Nov 2012 16:49:07 -0300

Actually, telling when the screen has finished updating is not that 
simple.  The OS could make an update, and then make another update 
almost immediately after, depending on system activity and requests from 
processes, etc.  I imagine FS have simply picked a relatively short time 
to wait and if no updates are made to the screen in that interval, then 
the event fires.  However, this is probably a tricky balancing act.  If 
the interval is to short, the event for fire constantly while if the 
time interval is too long, then the event may not fire when it should.

if you find it is firing too frequently for your needs, so that your 
custom code is getting run too often, you could use GettickCount to 
implement your own timer and use this to make sure your custom code gets 
run less frequently. It's just like thinning a Poisson process!  *grin* 
  Please excuse the incomprehensible and pretty pathetic maths joke, but 
I couldn't resist.

Cheers,
Andrew.

> Hi
>
> For the application I was working on at the time, I put a line in my
> ScreenStabilizedEvent function to append something to the clipboard each
> time it was called.  Then I would do something simple like switch from one
> screen to another or tab from one field to another.  After doing one of
> those things only once, I would paste the contents of the clipboard into
> Notepad.  I saw multiple invocations of the script.  I would then clear the
> clipboard and try the next test.  What I wanted to point out was that just
> because ScreenStabilizedEvent fires does not mean that the screen has been
> completed.  The number of times it fires is going to vary between
> applications depending on the interval between writing each chunk to the
> screen.  I would expect ScreenStabilizedEvent to be called much less often
> than NewTextEvent which is called for every chunk.  I was hoping that
> ScreenStabilizedEvent would let me know when the screen is complete, but
> that's not necessarily so.
>
>
> -----Original Message-----
> From: jawsscripts-bounce@xxxxxxxxxxxxx
> [mailto:jawsscripts-bounce@xxxxxxxxxxxxx] On Behalf Of Geoff Chapman
> Sent: Monday, November 05, 2012 01:26
> To: jawsscripts@xxxxxxxxxxxxx
> Subject: [jawsscripts] Re: PS further thoughts on my last, was optimal
> ScreenStabilizedEvent usage?
>
> Hi Mike.
>
> Hmmm, tha'ts certainly interesting. how do you tell the differential between
> those two things though?
>
> I.e. how could you tell the screen was only being filled the once, and still
> seeing multiple firings of ScreenStabilizedEvent?
> and, yes, that'd be the trick eh. to know what the time factor was that jaws
> waited before it felt appropriate to fire it.
> putting a SayString ("beep") in there to test it, certainly it doesn't seem
> to fire nearly as often, say, as newTextEvent does.
>
> ----- Original Message -----
> From: "Mike O'Brien" <mike23432@xxxxxxxxxxx>
> To: <jawsscripts@xxxxxxxxxxxxx>
> Sent: Saturday, November 03, 2012 1:22 AM
> Subject: [jawsscripts] Re: PS further thoughts on my last, was optimal
> ScreenStabilizedEvent usage?
>
>
>> Hi
>>
>> The description of ScreenStabilizedEvent says that it will fire when a
>> certain amount of time has passed since the last write to the screen.
>> I don't know what that amount of time is,, but I have seen the
>> function fire multiple times for the same screen during it being filled
> the one time.
>>
>>
>> -----Original Message-----
>> From: jawsscripts-bounce@xxxxxxxxxxxxx
>> [mailto:jawsscripts-bounce@xxxxxxxxxxxxx] On Behalf Of Geoff Chapman
>> Sent: Thursday, November 01, 2012 1:51 PM
>> To: jawsscripts@xxxxxxxxxxxxx
>> Subject: [jawsscripts] PS further thoughts on my last, was optimal
>> ScreenStabilizedEvent usage?
>>
>> Although, thinking about this a little more, I realize that iTunes
>> already makes the horrible swoosh noise when, it, thinks, it's
>> finished writing all info to the iTunes store window, so perhaps I'm
>> somewhat barking up the wrong tree in my last.  And rather what I
>> should be asking is, how I might jolly well check when Jaws is
>> finished getting confused/sluggish with it's refresh whole screen
>> functionality, instead?
>>
>> Is there a way of using ScreenStabilizedEvent to query that? when it's
>> osm has finished being written to, /messed with?
>>
>> Thanks again for any thoughts.
>>
>> Geoff c.
>>
>> ----- Original Message -----
>> From: "Geoff Chapman" <gch@xxxxxxxxxxxxxxxx>
>> To: <jawsscripts@xxxxxxxxxxxxx>
>> Sent: Friday, November 02, 2012 4:22 AM
>> Subject: [jawsscripts] optimal ScreenStabilizedEvent usage?
>>
>>
>>> Mighty Scripters.
>>> Wondering if any kind soul might feel like offering up a bit of
>>> starter code for me, that I might be able to utilize to see if the
>>> ScreenStabilizedEvent, function, might work in this dog-like iTunes
>>> store,
>>
>>> in the iTunes application?
>>>
>>> It's only parameter is a variable called HwndLastScreenWrite, and I
>>> know the class of the window recieving data when one does a search in
>>> iTunes store, is WC_iTunesWebViewControl,
>>>
>>> But, just how might I write code that said something like:
>>>
>>>
>>>
>>> if you've finished writing data to
>>>
>>> WC_iTunesWebViewControl now, then,
>>>
>>> SayString ("ready")
>>>
>>> EndIf
>>>
>>> or something similar?
>>>
>>>
>>>
>>>
>>>
>>> Of course Any aditional thoughts/comments from anyone as to
>>> usefulness, or
>>
>>> otherwise, of screenStabilizedEvent, would also be  much appreciated.
>>>
>>>
>>>
>>> Thanks much for any thoughts/assistance.
>>>
>>>
>>>
>>> Geoff c.
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
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