[Paraview] troubles with pipeline asynchronous update

[Nadir Raimondo]

Hi John,

thanks for your answer. Because I'm a newby I'd like to know more about 
the example:

TcpNotificationSocket is a QTcpSocket?

 From the code, it seems that it is used only to send a signal to a slot 
to execute the pipeline update in the paraview gui thread (in fact, the 
socket is closed immediatly).
Is this correct or is the socket used for "real" client/server 
communications?

Is it possible to use something similar for sending the signal from a 
thread using Qt::BlockingQueuedConnection?

Best regards,
Nadir


On 02/07/2012 05:35 PM, Biddiscombe, John A. wrote:
> Probably not safe, you need to update the pipeline on the main paraview gui thread
>
>    if (this->Internals->TcpNotificationSocket) {
>      this->connect(this->Internals->TcpNotificationSocket,
>        SIGNAL(readyRead()), SLOT(onNotified()), Qt::QueuedConnection);
>      this->Internals->TcpNotificationServer->close();
>    }
>
> Note use of Qt::QueuedConnection - in the panel/other handler you can then call update. This should ensure that you don't call update inside a thread whilst paraview is doing an update already somewhere else.
>
> JB