ObserverMemberFunction
VTKExamples/Cxx/Interaction/ObserverMemberFunction
Description¶
You must use the git version of VTK from at least 10/11/2010 to use this functionality.
Code¶
ObserverMemberFunction.cxx
#include <vtkPolyDataMapper.h> #include <vtkObjectFactory.h> #include <vtkCommand.h> #include <vtkActor.h> #include <vtkSmartPointer.h> #include <vtkRenderWindow.h> #include <vtkRenderer.h> #include <vtkRenderWindowInteractor.h> #include <vtkInteractorStyle.h> #include <vtkPolyData.h> #include <vtkSphereSource.h> #include <vtkInteractorStyleTrackballCamera.h> // A class not derived from vtkObjectBase class MyClass { public: void KeypressCallbackFunction(vtkObject*, long unsigned int vtkNotUsed(eventId), void* vtkNotUsed(callData)) { std::cout << "Caught event in MyClass" << std::endl; } }; // A class that is derived from vtkObjectBase class MyInteractorStyle : public vtkInteractorStyleTrackballCamera { public: static MyInteractorStyle* New(); vtkTypeMacro(MyInteractorStyle, vtkInteractorStyleTrackballCamera); void KeypressCallbackFunction(vtkObject*, long unsigned int vtkNotUsed(eventId), void* vtkNotUsed(callData) ) { std::cout << "Caught event in MyInteractorStyle" << std::endl; } }; vtkStandardNewMacro(MyInteractorStyle); int main(int, char *[]) { // Create a sphere vtkSmartPointer<vtkSphereSource> sphereSource = vtkSmartPointer<vtkSphereSource>::New(); sphereSource->SetCenter(0.0, 0.0, 0.0); sphereSource->SetRadius(5.0); sphereSource->Update(); vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New(); mapper->SetInputConnection(sphereSource->GetOutputPort()); // Create an actor vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New(); actor->SetMapper(mapper); // A renderer and render window vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->AddRenderer(renderer); // An interactor vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); renderWindowInteractor->SetRenderWindow(renderWindow); MyClass myClass; renderWindowInteractor->AddObserver(vtkCommand::KeyPressEvent, &myClass, &MyClass::KeypressCallbackFunction); MyInteractorStyle* style = MyInteractorStyle::New(); renderWindowInteractor->AddObserver(vtkCommand::KeyPressEvent, style, &MyInteractorStyle::KeypressCallbackFunction); vtkSmartPointer<MyInteractorStyle> style2 = vtkSmartPointer<MyInteractorStyle>::New(); renderWindowInteractor->AddObserver(vtkCommand::KeyPressEvent, style2, &MyInteractorStyle::KeypressCallbackFunction); renderer->AddActor(actor); renderer->SetBackground(1,1,1); // Background color white renderWindow->Render(); renderWindowInteractor->Start(); style->Delete(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(ObserverMemberFunction) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(ObserverMemberFunction MACOSX_BUNDLE ObserverMemberFunction.cxx) target_link_libraries(ObserverMemberFunction ${VTK_LIBRARIES})
Download and Build ObserverMemberFunction¶
Danger
The generation of tar files has not been ported to the new VTKExamples. Some tarballs may be missing or out-of-date.
Click here to download ObserverMemberFunction and its CMakeLists.txt file. Once the tarball ObserverMemberFunction.tar has been downloaded and extracted,
cd ObserverMemberFunction/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:
./ObserverMemberFunction
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.