[vtkusers] connection vtkQtTree - vtkGraphLayoutView

[Jeff Baumes]

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>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> 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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