Thread.Sleep locks my movies. Why?

Hi

To fake a slow connection, I do Thread.Sleep(random_delay);
However when I do that, it stops the movies on the screen (actually a
single movie). It also stops my story boards.

That Thread.Sleep is a delegate function called through the following

Application app = Application.Current;

app.Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.Background,
new GetProductList(this.PopulateProductListHandler));

Anyways, I can fix this behavior?

Thanks

Phil

Animations & storyboards, along with input processing, layout, data binding,
and a few other things, happen on the UI thread, so if the UI thread is
sleeping, those things won't get done.
https://blogs.msdn.com/nickkramer/ar...17/553378.aspx has more
details on WPF threading.

Why it's pausing the video is well is a little more of a mystery to me --
once the movie is started, the rendering happens on a different thread (the
render thread). All I can figure is maybe at some point, the movie needs to
synchronize the clock with the storyboard, and at that point gets stuck
waiting for the UI thread.

-Nick Kramer [MSFT]

---
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"Philippe Lavoie" <philippe.lavoie@cactus.ca> wrote in message
news:uTDZw$QVGHA.6084@TK2MSFTNGP14.phx.gbl...
> Hi
>
> To fake a slow connection, I do Thread.Sleep(random_delay);
> However when I do that, it stops the movies on the screen (actually a
> single movie). It also stops my story boards.
>
> That Thread.Sleep is a delegate function called through the following
>
> Application app = Application.Current;
>
> app.Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.Background,
> new GetProductList(this.PopulateProductListHandler));
>
> Anyways, I can fix this behavior?
>
> Thanks
>
> Phil

My issue is to get background processing done that will eventually
update some of the databinds, i.e. the UI thread (I guess).

Scenario: I do a request to a web service to fetch some products. I
don't want to block the UI, but the UI needs to be aware that the data
representing the products has been updated.

My approach seem to work except if I do a sleep. Perhaps I'll just add a
sleep on the web service itself to do my tests

Thanks

Phil

PS I'll start reading your whitepaper ASAP.

Nick Kramer [MSFT] wrote:
> Animations & storyboards, along with input processing, layout, data binding,
> and a few other things, happen on the UI thread, so if the UI thread is
> sleeping, those things won't get done.
> https://blogs.msdn.com/nickkramer/ar...17/553378.aspx has more
> details on WPF threading.
>
> Why it's pausing the video is well is a little more of a mystery to me --
> once the movie is started, the rendering happens on a different thread (the
> render thread). All I can figure is maybe at some point, the movie needs to
> synchronize the clock with the storyboard, and at that point gets stuck
> waiting for the UI thread.
>
> -Nick Kramer [MSFT]
>
> ---
> This posting is provided "AS IS" with no warranties, and confers no rights.
> Use of included script samples are subject to the terms specified at
> http://www.microsoft.com/info/cpyright.htm
>
> "Philippe Lavoie" <philippe.lavoie@cactus.ca> wrote in message
> news:uTDZw$QVGHA.6084@TK2MSFTNGP14.phx.gbl...
>
>>Hi
>>
>>To fake a slow connection, I do Thread.Sleep(random_delay);
>>However when I do that, it stops the movies on the screen (actually a
>>single movie). It also stops my story boards.
>>
>>That Thread.Sleep is a delegate function called through the following
>>
>>Application app = Application.Current;
>>
>>app.Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.Background,
>> new GetProductList(this.PopulateProductListHandler));
>>
>>Anyways, I can fix this behavior?
>>
>>Thanks
>>
>>Phil
>
>
>

Yeah, a server-side pause would do a really good job of simulating what
would actually happen in the case of network lag.

--
-Nick Kramer [MSFT]

---
This posting is provided "AS IS" with no warranties, and confers no rights.
Use of included script samples are subject to the terms specified at
http://www.microsoft.com/info/cpyright.htm

"Philippe Lavoie" <philippe.lavoie@cactus.ca> wrote in message
news:O634UKCWGHA.1192@TK2MSFTNGP04.phx.gbl...
> My issue is to get background processing done that will eventually update
> some of the databinds, i.e. the UI thread (I guess).
>
> Scenario: I do a request to a web service to fetch some products. I don't
> want to block the UI, but the UI needs to be aware that the data
> representing the products has been updated.
>
> My approach seem to work except if I do a sleep. Perhaps I'll just add a
> sleep on the web service itself to do my tests
>
> Thanks
>
> Phil
>
> PS I'll start reading your whitepaper ASAP.
>
> Nick Kramer [MSFT] wrote:
>> Animations & storyboards, along with input processing, layout, data
>> binding, and a few other things, happen on the UI thread, so if the UI
>> thread is sleeping, those things won't get done.
>> https://blogs.msdn.com/nickkramer/ar...17/553378.aspx has more
>> details on WPF threading.
>>
>> Why it's pausing the video is well is a little more of a mystery to me --
>> once the movie is started, the rendering happens on a different thread
>> (the render thread). All I can figure is maybe at some point, the movie
>> needs to synchronize the clock with the storyboard, and at that point
>> gets stuck waiting for the UI thread.
>>
>> -Nick Kramer [MSFT]
>>
>> ---
>> This posting is provided "AS IS" with no warranties, and confers no
>> rights.
>> Use of included script samples are subject to the terms specified at
>> http://www.microsoft.com/info/cpyright.htm
>>
>> "Philippe Lavoie" <philippe.lavoie@cactus.ca> wrote in message
>> news:uTDZw$QVGHA.6084@TK2MSFTNGP14.phx.gbl...
>>
>>>Hi
>>>
>>>To fake a slow connection, I do Thread.Sleep(random_delay);
>>>However when I do that, it stops the movies on the screen (actually a
>>>single movie). It also stops my story boards.
>>>
>>>That Thread.Sleep is a delegate function called through the following
>>>
>>>Application app = Application.Current;
>>>
>>>app.Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.Background,
>>> new GetProductList(this.PopulateProductListHandler));
>>>
>>>Anyways, I can fix this behavior?
>>>
>>>Thanks
>>>
>>>Phil
>>
>>