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.<div>
<br></div><div>Jeff<br><br><div class="gmail_quote">On Fri, Mar 11, 2011 at 4:41 PM, Nicolas Rannou <span dir="ltr"><<a href="mailto:nicolas_rannou@hms.harvard.edu">nicolas_rannou@hms.harvard.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div text="#000000" bgcolor="#ffffff">
Hi all,<br>
<br>
I'm trying to connect a <small>vtkQtTree</small> and a <small>vtkGraphLayout</small>
but the selection is not working as expected.<br>
<br>
When I select something in the <small>vtkGraphLayout</small>, the
selection can contain vertices and edges.<br>
When I select something in the <small>vtkQtTree</small>, the
selection only contains vertices.<br>
<br>
If I select edges + vertices in the <small>vtkGraphLayout</small>,
i.e. vertices: 1 and 4, edge:3, it highlights <u>vertices</u> 1,3,4
in the <small>vtkQtTree</small>...<br>
<br>
Then I have 3 questions/issues:<br>
(see pseudo-code at the end of the email)<br>
<br>
#1: should I modify the structure of my <small>vtkTree</small> (<small>Add
specific arrays for vertices/edges?</small>) so the <small>vtkQtTree</small>
handles properly selection of edges+vertices?<br>
<br>
#2: can I get my <small>vtkQtTree</small> to return the edges? Or
should I find the edges after it returns the vertices (is there an
efficient way to do it?)?<br>
<br>
#3: is there a straight forward way to disable edges selection in
the <small>vtkGraphLayoutView</small>? <small>(Something like:
EdgesNotSelectable()?)</small><br>
<br>
<br>
Thanks,<br>
<br>
<br>
Nicolas<br>
<br>
<br>
// What I do<br>
<br>
I first create a graph and add some arrays associated to the <u>vertices</u>.
<br>
<small> vtkSmartPointer<vtkMutableDirectedGraph> graph =<br>
vtkSmartPointer<vtkMutableDirectedGraph>::New();<br>
vtkIdType a = graph->AddVertex();<br>
vtkIdType b = graph->AddChild(a);<br>
vtkIdType c = graph->AddChild(a);<br>
<br>
vtkSmartPointer<vtkStringArray> cellType =<br>
vtkSmartPointer<vtkStringArray>::New();<br>
cellType->SetName("name");<br>
cellType->InsertValue(a, "TypeA");<br>
cellType->InsertValue(b, "TypeB");<br>
cellType->InsertValue(c, "TypeC");<br>
<br>
graph->GetVertexData()->AddArray(cellType);<br>
...<br>
</small><br>
I convert the graph to a <small>vtkTree</small> and add this
representation to the <small>vtkQtTree</small> and to the <small>vtkGraphLayout</small>.<br>
<br>
I connect the views through <small>vtkAnnotations</small> and <small>vtkEventQtSlotConnect</small>.<br>
<small> this->m_annotationLink =
vtkSmartPointer<vtkAnnotationLink>::New();<br>
this->m_treeGraphView->GetRepresentation()->SetAnnotationLink(this->m_annotationLink);<br>
this->m_treeTableView->GetRepresentation()->SetAnnotationLink(this->m_annotationLink);</small><br>
<br>
<small> this->m_connect =
vtkSmartPointer<vtkEventQtSlotConnect>::New();<br>
this->m_connect->Connect(this->m_treeTableView->GetRepresentation(),<br>
vtkCommand::SelectionChangedEvent,<br>
this, SLOT(selectionChanged(vtkObject*, unsigned long, void*,
void*)));<br>
this->m_connect->Connect(this->m_treeGraphView->GetRepresentation(),<br>
vtkCommand::SelectionChangedEvent,<br>
this, SLOT(selectionChanged(vtkObject*, unsigned long, void*,
void*)));</small><br>
<br>
<small>selectionChanged() only call update on the 2 views</small><br>
</div>
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