[Paraview] XML source questions

[Berk Geveci]

There is no way to have a Python script as-is in an XML file. The XML
parsers can't handle it. However, you can have your script import a
module, which is stored as a py file. I believe Ken Moreland from
Sandia implemented support for adding modules to plugins.

As for displaying only the tunable parameters of a Python filter, this
is not yet implemented but it is planned. Custom filters or plugins
will allow the developer to specify a list of parameters for the
programmable filter. Hopefully in 3.8. You can do this currently but
you have to create a plugin with a custom inspector panel.

-berk

On Fri, May 29, 2009 at 8:39 AM, David Doria <daviddoria at gmail.com> wrote:
> I am looking at the HelixSource xml example. With something like this:
>      <StringVectorProperty
>        name="NumberOfRounds"
>        command="SetParameter"
>        number_of_elements="2"
>        default_values_delimiter=";"
>        default_values="rounds;3">
>      </StringVectorProperty>
>
> It is displaying a label with a description of the property, a textbox with
> the name of the property, and another textbox with the value of the
> property. Is there anyway to skip the textbox with the name of the property
> (because it doesn't really make sense for the user to change this - so why
> allow it?)
>
> Also, the script itself seems to be set like this:
>      <StringVectorProperty
>         name="Script"
>         command="SetScript"
>         number_of_elements="1"
>         default_values="import math;&#xa;pdo =
> self.GetPolyDataOutput()&#xa;&#xa;newPts = vtk.vtkPoints()&#xa;for i in
> range(0, numPts):&#xa;   x = i*float(length)/float(numPts)&#xa;   y =
> math.sin(i*rounds*2*math.pi/numPts)&#xa;   z =
> math.cos(i*rounds*2*math.pi/numPts)&#xa;   newPts.InsertPoint(i,
> x,y,z)&#xa;&#xa;pdo.SetPoints(newPts)&#xa;aPolyLine =
> vtk.vtkPolyLine()&#xa;&#xa;aPolyLine.GetPointIds().SetNumberOfIds(numPts)&#xa;for
> i in range(0,numPts):&#xa;   aPolyLine.GetPointIds().SetId(i,
> i)&#xa;&#xa;pdo.Allocate(1,
> 1)&#xa;pdo.InsertNextCell(aPolyLine.GetCellType(),
> aPolyLine.GetPointIds())&#xa;">
>      </StringVectorProperty>
>
> That is a pretty cryptic way to have to write code - is there a way to take
> a normal looking script:
> import math
> pdo = self.GetPolyDataOutput()
> newPts = vtk.vtkPoints()
> etc.
>
> and point the xml to it - so you can edit the script in a .py file and the
> xml just points to that file? This also kind of stems from the first
> question - but I also would like to NOT display the script in the GUI - only
> the tunable parameters - is that possible?
>
> Thanks,
>
> David
>
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