PieChart
VTKExamples/Cxx/Plotting/PieChart
Code¶
PieChart.cxx
#include <vtkVersion.h> #include <vtkRenderer.h> #include <vtkRenderWindow.h> #include <vtkSmartPointer.h> #include <vtkChartPie.h> #include <vtkPlot.h> #include <vtkPlotPie.h> #include <vtkTable.h> #include <vtkIntArray.h> #include <vtkStringArray.h> #include <vtkContextView.h> #include <vtkContextScene.h> #include <vtkRenderWindowInteractor.h> #include <vtkColorSeries.h> int NUM_ITEMS = 5; static int data[] = {77938,9109,2070,12806,19514}; //static int data[] = {200,200,200,200,200}; static const char *labels[] = {"Books","New and Popular","Periodical","Audiobook","Video"}; int main(int, char*[]) { // Set up a 2D scene, add an XY chart to it vtkSmartPointer<vtkContextView> view = vtkSmartPointer<vtkContextView>::New(); view->GetRenderer()->SetBackground(1.0, 1.0, 1.0); view->GetRenderWindow()->SetSize(600, 350); vtkSmartPointer<vtkChartPie> chart = vtkSmartPointer<vtkChartPie>::New(); view->GetScene()->AddItem(chart); // Create a table with some points in it... vtkSmartPointer<vtkTable> table = vtkSmartPointer<vtkTable>::New(); vtkSmartPointer<vtkIntArray> arrData = vtkSmartPointer<vtkIntArray>::New(); vtkSmartPointer<vtkStringArray> labelArray = vtkSmartPointer<vtkStringArray>::New(); arrData->SetName("2008 Circulation"); for (int i = 0; i < NUM_ITEMS; i++) { arrData->InsertNextValue(data[i]); labelArray->InsertNextValue(labels[i]); } table->AddColumn(arrData); // Create a color series to use with our stacks. vtkSmartPointer<vtkColorSeries> colorSeries = vtkSmartPointer<vtkColorSeries>::New(); colorSeries->SetColorScheme(vtkColorSeries::WARM); // Add multiple line plots, setting the colors etc vtkPlotPie *pie = vtkPlotPie::SafeDownCast(chart->AddPlot(0)); pie->SetColorSeries(colorSeries); #if VTK_MAJOR_VERSION <= 5 pie->SetInput(table); #else pie->SetInputData(table); #endif pie->SetInputArray(0,"2008 Circulation"); pie->SetLabels(labelArray); chart->SetShowLegend(true); chart->SetTitle("Circulation 2008"); //Finally render the scene and compare the image to a reference image view->GetRenderWindow()->SetMultiSamples(0); view->GetInteractor()->Initialize(); view->GetInteractor()->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(PieChart) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(PieChart MACOSX_BUNDLE PieChart.cxx) target_link_libraries(PieChart ${VTK_LIBRARIES})
Download and Build PieChart¶
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 PieChart and its CMakeLists.txt file. Once the tarball PieChart.tar has been downloaded and extracted,
cd PieChart/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:
./PieChart
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.