KeypressObserver
VTKExamples/Cxx/Interaction/KeypressObserver
Code¶
KeypressObserver.cxx
#include <vtkPolyDataMapper.h> #include <vtkActor.h> #include <vtkSmartPointer.h> #include <vtkRenderWindow.h> #include <vtkRenderer.h> #include <vtkRenderWindowInteractor.h> #include <vtkPolyData.h> #include <vtkSphereSource.h> #include <vtkCallbackCommand.h> #include <vtkCommand.h> void KeypressCallbackFunction ( vtkObject* caller, long unsigned int eventId, void* clientData, void* callData ); 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); vtkSmartPointer<vtkCallbackCommand> keypressCallback = vtkSmartPointer<vtkCallbackCommand>::New(); keypressCallback->SetCallback ( KeypressCallbackFunction ); renderWindowInteractor->AddObserver ( vtkCommand::KeyPressEvent, keypressCallback ); renderer->AddActor(actor); renderer->SetBackground(1,1,1); // Background color white renderWindow->Render(); renderWindowInteractor->Start(); return EXIT_SUCCESS; } void KeypressCallbackFunction ( vtkObject* caller, long unsigned int vtkNotUsed(eventId), void* vtkNotUsed(clientData), void* vtkNotUsed(callData) ) { std::cout << "Keypress callback" << std::endl; vtkRenderWindowInteractor *iren = static_cast<vtkRenderWindowInteractor*>(caller); std::cout << "Pressed: " << iren->GetKeySym() << std::endl; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(KeypressObserver) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(KeypressObserver MACOSX_BUNDLE KeypressObserver.cxx) target_link_libraries(KeypressObserver ${VTK_LIBRARIES})
Download and Build KeypressObserver¶
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 KeypressObserver and its CMakeLists.txt file. Once the tarball KeypressObserver.tar has been downloaded and extracted,
cd KeypressObserver/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:
./KeypressObserver
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.