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

[Nicolas Rannou]

Hi Julien,

 I tried:

this->m_treeTableView->AddRepresentationFromInput(tree);
this->m_treeTableView->SetShowRootNode(true);
this->m_treeTableView->Update();

but the root node is not visible in the vtkQtTreeView...

Nicolas

On Mar 15, 2011, at 6:31 PM, Julien Finet wrote:

> Did you try vtkQtTreeView::SetShowRootNode(true)  ? 
> Julien.
> 
> On Tue, Mar 15, 2011 at 6:28 PM, Nicolas Rannou <nicolas_rannou at hms.harvard.edu> wrote:
> Hi Jeff,
> 
> another thing we noticed is that the root vertex is not shown in the vtkQtTreeView. Is there any reason for that or is it a bug?
> 
> If "A" is the tree root vertex:
> 
> vtkGraphLayoutView:
> 
> A--->B--->C--->D
>     |        |
>     |        ->E
>     ->F
> 
> vtkQtTreeView:
> 
> B--->C--->D
>     |
>     ->E
> F
> 
> Thanks,
> 
> 
> Nicolas
> 
> 
> On 03/14/2011 02:36 PM, Nicolas Rannou wrote:
>> 
>> 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> 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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>>> 
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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
>> 
> 
> 
> _______________________________________________
> Powered by www.kitware.com
> 
> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
> 
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