[vtk-developers] [vtkusers] connection vtkQtTree - vtkGraphLayoutView

[Nicolas Rannou]

Thanks for the feedback Jeff,

I added it in the bug tracker. 
(http://public.kitware.com/Bug/view.php?id=11969)

I'll submit a patch for the vtkGraphLayoutView in the next days.

Thanks,

Nicolas

On 03/14/2011 01:12 PM, Jeff Baumes wrote:
> Glancing at your message again, it appears you are also finding a bug 
> in vtkQtTreeView where it interprets edge ids as vertex ids. If you 
> could add that to the VTK bug tracker, I could hopefully take a look 
> at it sometime soon. Getting rid of edge selections in the graph 
> layout view as I suggested would work around this problem.
>
> On Mon, Mar 14, 2011 at 1:07 PM, Jeff Baumes <jeff.baumes at kitware.com 
> <mailto:jeff.baumes at kitware.com>> wrote:
>
>     I do not know of a simple way to make this difference in
>     selections go away. The vtkGraphLayoutView generates vertex + edge
>     selections, and vtkQtTreeView generates vertex-only selections. I
>     believe the best solution is to have vtkGraphLayoutView have an
>     option to not select edges, as you suggested. If you are
>     interested in adding that option, you can patch
>     vtkGraphLayoutView.cxx to add some checks in ConvertSelection()
>     based on a new boolean member variable and submit it to us for
>     inclusion in VTK, or you could subclass vtkGraphLayoutView and
>     reimplement ConvertSelection() if you want to just get it working
>     for your own application.
>
>     Jeff
>
>     On Fri, Mar 11, 2011 at 4:41 PM, Nicolas Rannou
>     <nicolas_rannou at hms.harvard.edu
>     <mailto:nicolas_rannou at hms.harvard.edu>> wrote:
>
>         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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>
>
>
>     -- 
>     Jeff Baumes, Ph.D.
>     Technical Lead, Kitware Inc.
>     (518) 881-4932
>
>
>
>
> -- 
> Jeff Baumes, Ph.D.
> Technical Lead, Kitware Inc.
> (518) 881-4932

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