BarChart

VTKExamples/Cxx/Plotting/BarChart


Code

BarChart.cxx

#include <vtkVersion.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkSmartPointer.h>
#include <vtkChartXY.h>
#include <vtkPlot.h>
#include <vtkTable.h>
#include <vtkIntArray.h>
#include <vtkContextView.h>
#include <vtkContextScene.h>
#include <vtkRenderWindowInteractor.h>

#define VTK_CREATE(type, name) \
  vtkSmartPointer<type> name = vtkSmartPointer<type>::New()


// Monthly circulation data
static int data_2008[] = {10822, 10941, 9979, 10370, 9460, 11228, 15093, 12231, 10160, 9816, 9384, 7892};
static int data_2009[] = {9058, 9474, 9979, 9408, 8900, 11569, 14688, 12231, 10294, 9585, 8957, 8590};
static int data_2010[] = {9058, 10941, 9979, 10270, 8900, 11228, 14688, 12231, 10160, 9585, 9384, 8590};

int main(int, char*[] )
{
  // Set up a 2D scene, add an XY chart to it
  VTK_CREATE(vtkContextView, view);
  view->GetRenderer()->SetBackground(1.0, 1.0, 1.0);
  view->GetRenderWindow()->SetSize(400, 300);
  VTK_CREATE(vtkChartXY, chart);
  view->GetScene()->AddItem(chart);

  // Create a table with some points in it...
  VTK_CREATE(vtkTable, table);

  VTK_CREATE(vtkIntArray, arrMonth);
  arrMonth->SetName("Month");
  table->AddColumn(arrMonth);

  VTK_CREATE(vtkIntArray, arr2008);
  arr2008->SetName("2008");
  table->AddColumn(arr2008);

  VTK_CREATE(vtkIntArray, arr2009);
  arr2009->SetName("2009");
  table->AddColumn(arr2009);

  VTK_CREATE(vtkIntArray, arr2010);
  arr2010->SetName("2010");
  table->AddColumn(arr2010);

  table->SetNumberOfRows(12);
  for (int i = 0; i < 12; i++)
  {
    table->SetValue(i,0,i+1);
    table->SetValue(i,1,data_2008[i]);
    table->SetValue(i,2,data_2009[i]);
    table->SetValue(i,3,data_2010[i]);
  }

  // Add multiple line plots, setting the colors etc
  vtkPlot *line = 0;

  line = chart->AddPlot(vtkChart::BAR);
#if VTK_MAJOR_VERSION <= 5
  line->SetInput(table, 0, 1);
#else
  line->SetInputData(table, 0, 1);
#endif
  line->SetColor(0, 255, 0, 255);

  line = chart->AddPlot(vtkChart::BAR);
#if VTK_MAJOR_VERSION <= 5
  line->SetInput(table, 0, 2);
#else
  line->SetInputData(table, 0, 2);
#endif
  line->SetColor(255, 0, 0, 255);

  line = chart->AddPlot(vtkChart::BAR);
#if VTK_MAJOR_VERSION <= 5
  line->SetInput(table, 0, 3);
#else
  line->SetInputData(table, 0, 3);
#endif
  line->SetColor(0, 0, 255, 255);

  //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(BarChart)

find_package(VTK REQUIRED)
include(${VTK_USE_FILE})

add_executable(BarChart MACOSX_BUNDLE BarChart.cxx )

target_link_libraries(BarChart ${VTK_LIBRARIES})

Download and Build BarChart

Click here to download BarChart and its CMakeLists.txt file. Once the tarball BarChart.tar has been downloaded and extracted,

cd BarChart/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:

./BarChart

WINDOWS USERS

Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.