DoubleClick
VTKExamples/Cxx/Interaction/DoubleClick
Code¶
DoubleClick.cxx
#include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkRenderer.h> #include <vtkSphereSource.h> #include <vtkPolyDataMapper.h> #include <vtkActor.h> #include <vtkSmartPointer.h> #include <vtkPointPicker.h> #include <vtkCamera.h> #include <vtkInteractorStyleTrackballCamera.h> #include <vtkObjectFactory.h> // Define interaction style class MouseInteractorStyleDoubleClick : public vtkInteractorStyleTrackballCamera { public: static MouseInteractorStyleDoubleClick* New(); vtkTypeMacro(MouseInteractorStyleDoubleClick, vtkInteractorStyleTrackballCamera); MouseInteractorStyleDoubleClick() : NumberOfClicks(0), ResetPixelDistance(5) { this->PreviousPosition[0] = 0; this->PreviousPosition[1] = 0; } virtual void OnLeftButtonDown() { //std::cout << "Pressed left mouse button." << std::endl; this->NumberOfClicks++; //std::cout << "NumberOfClicks = " << this->NumberOfClicks << std::endl; int pickPosition[2]; this->GetInteractor()->GetEventPosition(pickPosition); int xdist = pickPosition[0] - this->PreviousPosition[0]; int ydist = pickPosition[1] - this->PreviousPosition[1]; this->PreviousPosition[0] = pickPosition[0]; this->PreviousPosition[1] = pickPosition[1]; int moveDistance = (int)sqrt((double)(xdist*xdist + ydist*ydist)); // Reset numClicks - If mouse moved further than resetPixelDistance if(moveDistance > this->ResetPixelDistance) { this->NumberOfClicks = 1; } if(this->NumberOfClicks == 2) { std::cout << "Double clicked." << std::endl; this->NumberOfClicks = 0; } // forward events vtkInteractorStyleTrackballCamera::OnLeftButtonDown(); } private: unsigned int NumberOfClicks; int PreviousPosition[2]; int ResetPixelDistance; }; vtkStandardNewMacro(MouseInteractorStyleDoubleClick); int main(int, char *[]) { 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()); vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New(); actor->SetMapper(mapper); vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); renderer->SetBackground(1,1,1); // Background color white renderer->AddActor(actor); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->AddRenderer(renderer); vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); renderWindowInteractor->SetRenderWindow ( renderWindow ); vtkSmartPointer<MouseInteractorStyleDoubleClick> style = vtkSmartPointer<MouseInteractorStyleDoubleClick>::New(); renderWindowInteractor->SetInteractorStyle( style ); renderWindowInteractor->Initialize(); renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(DoubleClick) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(DoubleClick MACOSX_BUNDLE DoubleClick.cxx) target_link_libraries(DoubleClick ${VTK_LIBRARIES})
Download and Build DoubleClick¶
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 DoubleClick and its CMakeLists.txt file. Once the tarball DoubleClick.tar has been downloaded and extracted,
cd DoubleClick/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:
./DoubleClick
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.