[Paraview] Changing values of property panel

[Andrzej Peczak]

Hi Yumin,

I used your snippet and it is working fine. I also tried to change the properties of the upstream filter in addition to the active one but it put me into trouble. I am modifying the properties with the following code where I want to change the visibility, surface representation and input array of the upstream. When I execute the code the widgets get changed but nothing happens in the view with regards to the changes I made to the upstream, that is the upstream object stays invisible. To make the object visible I have to manually click on the active object. After that the upstream object becomes visible but then its colour mapping does not change in accordance with  the input array I set to the upstream.


The other issue I have is when I delete my object from the pipeline after modifying the lookup table. Paraview displays "vtkSMPVRepresentationProxy (0x2f6c8c0): Failed to determine the LookupTable being used." message.

        vtkSMProxy* repProxy = repr->getProxy();
        const char * arrayName = vtkSMPropertyHelper(repProxy, "ColorArrayName").GetInputArrayNameToProcess();
        int association = vtkSMPropertyHelper(repProxy, "ColorArrayName").GetInputArrayAssociation();

        pqDataRepresentation * uRepr = repr->getRepresentationForUpstreamSource();
        vtkSMProxy* uRepProxy = uRepr->getProxy();
        vtkSMPropertyHelper( uRepProxy, "ColorArrayName" ).SetInputArrayToProcess( association, arrayName );
        vtkSMPropertyHelper( uRepProxy, "ColorArrayName" ).Set( arrayName );
        vtkSMPropertyHelper( uRepProxy, "Visibility" ).Set( 1 );
        vtkSMPropertyHelper( uRepProxy, "Representation" ).Set( "Surface" );

        repProxy->UpdateVTKObjects();
        uRepProxy->UpdateVTKObjects();


Andrzej

________________________________
From: Yumin Yuan [yumin.yuan at kitware.com]
Sent: 27 January 2016 14:41
To: Andrzej Peczak
Cc: paraview at paraview.org
Subject: Re: [Paraview] Changing values of property panel

Hi Andrzej,

The representation has its own SM proxy,

    vtkSMProxy* repProxy = repr->getProxy();
    vtkSMPropertyHelper(repProxy, "Representation").Set("Surface With Edges");
    vtkSMPropertyHelper(repProxy, "LineWidth").Set(2);

HTH,
Yumin


On Wed, Jan 27, 2016 at 7:36 AM, Andrzej Peczak <apeczak at ara.co.uk<mailto:apeczak at ara.co.uk>> wrote:

Hi

I am trying to find a way to modify property values of a filter. I figured out how to change values of the lookup table through its proxy after which the changes are visible in the colour map editor panel widgets.

I can do it with the following snippet code, however I have not found yet the way to change properties of the filter property panel.  I need to change the view representation of the filter to Surface With Edges and the line width. Where  do I acquire required proxy objects from ?

        pqPipelineRepresentation* repr = qobject_cast< pqPipelineRepresentation* >( pqActiveObjects::instance().activeRepresentation() );
        if ( repr ) {
                vtkSMProxy * lutProxy = repr->getLookupTable()->getProxy();
                if ( lutProxy ) {
                        vtkSMPropertyHelper( lutProxy, "NumberOfTableValues" ).Set( this->scalars().count() - 1 );
                        lutProxy->UpdateVTKObjects();
                }
        }

Andrzej

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