[Paraview] Troubles with exporting selection labels from current ParaView render view

[Nenad Vujicic]

Hello again,

I have one another problem with the latest PV sources (v4.3.1, I used
VS2008 x64 built with most of extra packages from super-build enabled)
and creating labels. Again everything worked fine on v4.0 (and I think
v4.2), but now, not anymore .. Here is what I tried:

1. I created a source plugin which outputs on output port 0 set of
points and on output port 1 set of lines.
2. I registered handlers to catch signals sourceAdded(),
sourceCreated(), representationAdded(), representationRemoved() etc,
3. In handler for RepresentationAdded, when representation for output
port 0 (set of points) is created, I previously created
DataLabelRepresentation and initialized, but now it just reports data
representation is reported and does nothing..
4. Now, I tried to set some parameters of representation subproxy by:

// set representation's properties
pqSMAdaptor::setElementProperty(mptrPointsRepresentation->getProxy()->GetProperty("SelectionVisibility"),
true);
pqSMAdaptor::setElementProperty(mptrPointsRepresentation->getProxy()->GetProperty("SelectionPointLabelVisibility"),
true);
pqSMAdaptor::setMultipleElementProperty(mptrPointsRepresentation->getProxy()->GetProperty("SelectionPointLabelColor"),
rPointLabelColor);
pqSMAdaptor::setElementProperty(mptPointsRepresentation->getProxy()->GetProperty("SelectionPointLabelFontSize"),
iPointLabelSize);
pqSMAdaptor::setElementProperty(mptrPointsRepresentation->getProxy()->GetProperty("SelectionPointLabelFormat"),
strPointLabelFormat);
pqSMAdaptor::setElementProperty(mptrPointsRepresentation->getProxy()->GetProperty("SelectionPointLabelJustification"),
iPointLabelJustification);

// update underlying VTK objects
mptrPointsRepresentation->getProxy()->UpdateVTKObjects();

But, it still doesn't work.

Btw, when I create sphere, apply elevation and select some points
(with started tracing), I don't see any of these parameters turned ON.
I don't see anything about selected points .. Also, I noticed
selections are not preserved in state files.

Thanks in advance for any help!

Nenad.


On Wed, May 13, 2015 at 2:21 PM, Nenad Vujicic <nenadus at gmail.com> wrote:
> Hello everyone,
>
> It has been a long time ParaView sources worked excellent with my
> patches and the plugin (3D exporter). However, I'm having troubles
> with the latest version (v4.3.1) to export labels which are shown over
> selected points (both per point and per cell). This was my approach
> which worked with v4.0.1 (100% sure) and v4.2 (I think, but, I'm not
> definitely sure):
>
> 1. I traverse all visible pipeline sources and for all their
> representations in currently active view do next,
> 2. For every representation, I check if it is DataLabelRepresentation
> and if it is I save PointLabelVisibility, PointFieldDataArrayName, etc
> properties ..
> 3. From other representations, I get vtkLODActor for which I bind my
> labels properties,
> 4. In exporting code, I get current view, traverse its actors and
> export them, however, there is one problem now. Let me give an
> example:
>
>     - If I have Sphere on which I applied Elevation filter and
> selected several points with turned on labels (with e.g. Elevation
> selected as array),
>
>     - Strange 1: I don't have anymore instance in
> DataLabelRepresentation for Elevation pipeline source (btw, during
> this traversing I get only one actor),
>     - Strange 2: When I traverse vtkRenderer's actors, I get 2 actors
> (sphere mesh and actor with selected points), but, I'm unable to
> connect selection label properties (which are tied with Elevation
> pipeline source actor - sphere mesh) and mesh with selected points /
> cells.
>
> Q1: How to identify actor from vtkRenderer which contains selection
> points / cells and get selection properties from this actor or
>
> Q2: How to identify actor from pqPipeline source on which are selected
> points and how from appropriate representations to get actor which
> contains selected points / cells?
>
> Thanks everyone for possible answers!
>
> Nenad.