[Paraview] Changing values of property panel
Andrzej Peczak
apeczak at ara.co.uk
Fri Jan 29 11:01:42 EST 2016
Hi
I used vtkSMPVRepresentationProxy::SetScalarColoring() as suggested ( which resolved the error message after I manually deleted my filter in the pipeline browser ) followed by vtkSMPVRepresentationProxy::RescaleTransferFunctionToDataRange() what allowed me to retrieve a valid RGBPoints array from the lookup table. myView->render() and setting the lookup table also helped me resolve the other issues and it all works nicely for me.
Now I am trying to wrap up my algorithm into a filter class and thought that either RequestData() or RequestUpdateExtent() may be a good place to do it. Unfortunately the pipeline representation object is not available when I create the filter for the first time and press Apply. I also figured out that once the filter has been created, modified and the Apply button was pressed again the filter already knows that the representation is there. Is there a way around it to get this to work all the time or do I have to register a button which would need to be used after the filter has been created in the pipeline browser in order to update its properties for the first time ?
Andrzej
-----Original Message-----
From: Utkarsh Ayachit [mailto:utkarsh.ayachit at kitware.com]
Sent: 28 January 2016 15:07
To: Yumin Yuan
Cc: Andrzej Peczak; paraview at paraview.org
Subject: Re: [Paraview] Changing values of property panel
As a side note, for changing coloring on representations, I'd suggest using vtkSMPVRepresentationProxy::SetScalarColoring() [1] instead of changing "ColorArrayName" directly. That takes care of setting up lookup table etc. ParaView would.
[1] http://www.paraview.org/ParaView3/Doc/Nightly/www/cxx-doc/classvtkSMPVRepresentationProxy.html#acb45bfbb4940b0a6a30852aaff0a8b35
From: Yumin Yuan [mailto:yumin.yuan at kitware.com]
Sent: 28 January 2016 14:02
To: Andrzej Peczak
Cc: paraview at paraview.org
Subject: Re: [Paraview] Changing values of property panel
Hi Andrzej,
On Thu, Jan 28, 2016 at 8:25 AM, Andrzej Peczak <apeczak at ara.co.uk<mailto:apeczak at ara.co.uk>> wrote:
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.
You may be missing a render call. Try adding the following at the end
myView->render();
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.
You have to also set the same "LookupTable" to the upstream representation.
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.
Which object? how did you delete it? Normally this message means you have an empty "LookupTable".
HTH
Yumin
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<mailto:yumin.yuan at kitware.com>]
Sent: 27 January 2016 14:41
To: Andrzej Peczak
Cc: paraview at paraview.org<mailto: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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