[Paraview-developers] Updating view properties

[Utkarsh Ayachit]

David,

Alright, let's take a few steps back and see how to deal with this issue.

First try putting a cout or something in vtkPVContextView::Render().
Is this method called every time the axis changes? This method is
called on all processes simultaneously. So if it is getting called
when the axis changes, we have a good anchor point for out code.

Utkarsh

On Thu, Feb 10, 2011 at 3:33 PM, David Thompson <dcthomp at sandia.gov> wrote:
>>> I'm not sure exactly which "change event" you mean I should listen to.
>>> The
>>> EndEvent signalling the end of a render? The Modified event signaling a
>>> change in the vtkPVContextView subclass on the client? Or (certainly not)
>>> the StateChangedEvent used by Undo/Redo?
>>
>> The event after which you wish to update the representations. I am not
>> sure what event the vtkAxis fires, if any when the limit changes,...
>
> It doesn't, but...
>
>> ... but that's what should trigger the change in properties on the
>> representation, right?
>
> Yes. I was checking whether vtkAxis changed by observing the EndEvent
> emitted by vtkContextView on the client. When it changed, I would
> 1. use a vtkSMPropertyHelper to update the property of the vtkPVContextView
> subclass,
> 2. call UpdateProperty() on the proxy, and then
> 3. invoke render() on the pqView subclass.
> But on the server side, this results in a WrongTagEvent (it receives tag 16
> instead of 1) followed by the server exiting.
>
> If I understand your suggestion, then instead of steps #1-2 above, I should
> be using SendStream() to invoke a method on all the processes'
> vtkPVContextView subclasses?
>
>        Thanks,
>        David
>