[Paraview] When changing the number of output ports dynamically pipeline browser is not updated

[joeh at cis.jhu.edu]

Hello,

I have written a subclass of vtkPolyDataAlgorithm, that has a dynamic
number of output ports. When the number of output ports are hard coded
into the constructor the pipeline browser in the paraview application
displays the correct number of output ports. But when the number of output
ports are changed outside the constructor the paraview pipeline browser is
not updated.

How does one force an update the paraview pipeline browser when the number
of output ports has changed, from inside a subclass of
vtkPolyDataAlgorithm outside of the constructor?

Thanks,

-Joe