SelectedVerticesAndEdges
VTKExamples/Cxx/Graphs/SelectedVerticesAndEdges
Description
- Thanks to Eric Monson
Code
SelectedVerticesAndEdges.cxx
#include <vtkSmartPointer.h>
#include <vtkAnnotationLink.h>
#include <vtkRenderedGraphRepresentation.h>
#include <vtkRenderer.h>
#include <vtkHardwareSelector.h>
#include <vtkDoubleArray.h>
#include <vtkSelectionNode.h>
#include <vtkIdTypeArray.h>
#include <vtkSelection.h>
#include <vtkRenderWindow.h>
#include <vtkUnsignedCharArray.h>
#include <vtkObjectFactory.h>
#include <vtkGraphLayoutStrategy.h>
#include <vtkGraphLayoutView.h>
#include <vtkGraphWriter.h>
#include <vtkMutableUndirectedGraph.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkSimple2DLayoutStrategy.h>
#include <vtkInteractorStyleRubberBand2D.h>
class RubberBandStyle : public vtkInteractorStyleRubberBand2D
{
public:
static RubberBandStyle* New();
vtkTypeMacro(RubberBandStyle, vtkInteractorStyleRubberBand2D);
virtual void OnLeftButtonUp()
{
// Forward events
vtkInteractorStyleRubberBand2D::OnLeftButtonUp();
vtkSelection* selection = this->View->GetRepresentation()->GetAnnotationLink()->GetCurrentSelection();
vtkSelectionNode* vertices;
vtkSelectionNode* edges;
if(selection->GetNode(0)->GetFieldType() == vtkSelectionNode::VERTEX)
{
vertices = selection->GetNode(0);
}
else if(selection->GetNode(0)->GetFieldType() == vtkSelectionNode::EDGE)
{
edges = selection->GetNode(0);
}
if(selection->GetNode(1)->GetFieldType() == vtkSelectionNode::VERTEX)
{
vertices = selection->GetNode(1);
}
else if(selection->GetNode(1)->GetFieldType() == vtkSelectionNode::EDGE)
{
edges = selection->GetNode(1);
}
vtkIdTypeArray* vertexList = vtkIdTypeArray::SafeDownCast(vertices->GetSelectionList());
std::cout << "There are " << vertexList->GetNumberOfTuples() << " vertices selected." << std::endl;
if(vertexList->GetNumberOfTuples() > 0)
{
std::cout << "Vertex Ids: ";
}
for(vtkIdType i = 0; i < vertexList->GetNumberOfTuples(); i++)
{
std::cout << vertexList->GetValue(i) << " ";
}
std::cout << std::endl;
vtkIdTypeArray* edgeList = vtkIdTypeArray::SafeDownCast(edges->GetSelectionList());
std::cout << "There are " << edgeList->GetNumberOfTuples() << " edges selected." << std::endl;
if(edgeList->GetNumberOfTuples() > 0)
{
std::cout << "Edge Ids: ";
}
for(vtkIdType i = 0; i < edgeList->GetNumberOfTuples(); i++)
{
std::cout << edgeList->GetValue(i) << " ";
}
std::cout << std::endl;
}
vtkGraphLayoutView* View;
};
vtkStandardNewMacro(RubberBandStyle);
int main(int, char *[])
{
vtkSmartPointer<vtkMutableUndirectedGraph> g =
vtkSmartPointer<vtkMutableUndirectedGraph>::New();
vtkIdType v1 = g->AddVertex();
vtkIdType v2 = g->AddVertex();
g->AddEdge(v1, v2);
g->AddEdge(v1, v2);
vtkSmartPointer<vtkGraphLayoutView> view =
vtkSmartPointer<vtkGraphLayoutView>::New();
view->AddRepresentationFromInput(g);
view->SetLayoutStrategy("Simple 2D");
vtkSmartPointer<RubberBandStyle> style =
vtkSmartPointer<RubberBandStyle>::New();
style->View = view;
view->SetInteractorStyle(style);
view->ResetCamera();
view->Render();
view->GetInteractor()->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(SelectedVerticesAndEdges)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(SelectedVerticesAndEdges MACOSX_BUNDLE SelectedVerticesAndEdges.cxx)
target_link_libraries(SelectedVerticesAndEdges ${VTK_LIBRARIES})
Download and Build SelectedVerticesAndEdges
Click here to download SelectedVerticesAndEdges and its CMakeLists.txt file. Once the tarball SelectedVerticesAndEdges.tar has been downloaded and extracted,
cd SelectedVerticesAndEdges/build
If VTK is installed:
cmake ..
If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:
cmake -DVTK_DIR:PATH=/home/me/vtk_build ..
Build the project:
make
and run it:
./SelectedVerticesAndEdges
WINDOWS USERS PLEASE NOTE: Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.