[Paraview] server-side InvokeEvent(...) doesn't call client-side observer

[Kolja Petersen]

Oh, well, but how is Catalyst forwarding new time step information from
server to client?
Time step updates can occur at any time. Which event mechanism notifies the
client?
Thanks
Kolja

On Wed, Nov 22, 2017 at 6:57 PM, Utkarsh Ayachit <
utkarsh.ayachit at kitware.com> wrote:

> This is not a use-case supported in ParaView. We don't forward events from
> server to client.
>
> On Wed, Nov 22, 2017 at 12:53 PM, Kolja Petersen <petersenkolja at gmail.com>
> wrote:
>
>> Hello,
>> I would like to invoke a callback on a proxy in a pvpython session from a
>> server-side method.
>>
>> In my server-side class "vtkCustom" I have a method
>> void vtkCustom::SetData(int i){
>>   ...
>>   this->InvokeEvent(1999,NULL);
>>   ...
>> }
>>
>>
>> On the client side, I create a proxy to a vtkCustom object, register an
>> observer and set the "Data" property, which should invoke eventid=1999:
>> ...
>> custom=pxm.NewProxy("myextensions","Custom")
>> pxm.RegisterProxy("myextensions","Custom",custom)
>>
>> def fun(obj,event):
>>   print "CALLBACK",obj,event
>>
>> custom.AddObserver(1999,fun)
>> vtk.vtkSMPropertyHelper(custom.GetProperty("Data")).Set(42)
>> ...
>>
>> The observer function "fun" on the client is never invoked, although the
>> server-side invokes that event. I'm misunderstanding some concept of
>> Paraviews event mechanism for sure. Can you help me correct my steps?
>> Thanks
>> Kolja
>>
>>
>>
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