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

[Julien Finet]

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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>>>
>>
>>
>> --
>> 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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>
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