[vtkusers] connection vtkQtTree - vtkGraphLayoutView

[Nicolas Rannou]

Hi all,

I'm trying to connect a vtkQtTree and a vtkGraphLayout but the selection 
is not working as expected.

When I select something in the vtkGraphLayout, the selection can contain 
vertices and edges.
When I select something in the vtkQtTree, the selection only contains 
vertices.

If I select edges + vertices in the vtkGraphLayout, i.e. vertices: 1 and 
4, edge:3, it highlights _vertices_ 1,3,4 in the vtkQtTree...

Then I have 3 questions/issues:
(see pseudo-code at the end of the email)

#1: should I modify the structure of my vtkTree (Add specific arrays for 
vertices/edges?) so the vtkQtTree handles properly selection of 
edges+vertices?

#2: can I get my vtkQtTree to return the edges? Or should I find the 
edges after it returns the vertices (is there an efficient way to do it?)?

#3: is there a straight forward way to disable edges selection in the 
vtkGraphLayoutView? (Something like: EdgesNotSelectable()?)


Thanks,


Nicolas


// What I do

I first create a graph and add some arrays associated to the _vertices_.
   vtkSmartPointer<vtkMutableDirectedGraph> graph =
     vtkSmartPointer<vtkMutableDirectedGraph>::New();
   vtkIdType a = graph->AddVertex();
   vtkIdType b = graph->AddChild(a);
   vtkIdType c = graph->AddChild(a);

   vtkSmartPointer<vtkStringArray> cellType =
       vtkSmartPointer<vtkStringArray>::New();
   cellType->SetName("name");
   cellType->InsertValue(a, "TypeA");
   cellType->InsertValue(b, "TypeB");
   cellType->InsertValue(c, "TypeC");

   graph->GetVertexData()->AddArray(cellType);
...

I convert the graph to a vtkTree and add this representation to the 
vtkQtTree and to the vtkGraphLayout.

I connect the views through vtkAnnotations and vtkEventQtSlotConnect.
   this->m_annotationLink = vtkSmartPointer<vtkAnnotationLink>::New();
   
this->m_treeGraphView->GetRepresentation()->SetAnnotationLink(this->m_annotationLink);
   
this->m_treeTableView->GetRepresentation()->SetAnnotationLink(this->m_annotationLink);

   this->m_connect = vtkSmartPointer<vtkEventQtSlotConnect>::New();
   this->m_connect->Connect(this->m_treeTableView->GetRepresentation(),
     vtkCommand::SelectionChangedEvent,
     this, SLOT(selectionChanged(vtkObject*, unsigned long, void*, void*)));
   this->m_connect->Connect(this->m_treeGraphView->GetRepresentation(),
     vtkCommand::SelectionChangedEvent,
     this, SLOT(selectionChanged(vtkObject*, unsigned long, void*, void*)));

selectionChanged() only call update on the 2 views
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