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