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StackedBar

vtk-examples/Cxx/Plotting/StackedBar


Question

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Code

StackedBar.cxx

#include <vtkAxis.h>
#include <vtkChartLegend.h>
#include <vtkChartXY.h>
#include <vtkColorSeries.h>
#include <vtkContextScene.h>
#include <vtkContextView.h>
#include <vtkDoubleArray.h>
#include <vtkIntArray.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkPlotBar.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkStringArray.h>
#include <vtkTable.h>
#include <vtkTextProperty.h>

namespace {
constexpr int num_months = 12;

constexpr int month[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12};

constexpr int book_2008[] = {5675, 5902, 6388, 5990, 5575, 7393,
                             9878, 8082, 6417, 5946, 5526, 5166};
constexpr int new_popular_2008[] = {701, 687, 736, 696, 750, 814,
                                    923, 860, 786, 735, 680, 741};
constexpr int periodical_2008[] = {184, 176, 166, 131, 171, 191,
                                   231, 166, 197, 162, 152, 143};
constexpr int audiobook_2008[] = {903,  1038, 987,  1073, 1144, 1203,
                                  1173, 1196, 1213, 1076, 926,  874};
constexpr int video_2008[] = {1524, 1565, 1627, 1445, 1179, 1816,
                              2293, 1811, 1588, 1561, 1542, 1563};

constexpr int book_2009[] = {6388, 5990, 5575, 9878, 8082, 5675,
                             7393, 5902, 5526, 5166, 5946, 6417};
constexpr int new_popular_2009[] = {696, 735, 786, 814, 736, 860,
                                    750, 687, 923, 680, 741, 701};
constexpr int periodical_2009[] = {197, 166, 176, 231, 171, 152,
                                   166, 131, 184, 191, 143, 162};
constexpr int audiobook_2009[] = {1213, 1076, 926,  987,  903, 1196,
                                  1073, 1144, 1203, 1038, 874, 1173};
constexpr int video_2009[] = {2293, 1561, 1542, 1627, 1588, 1179,
                              1563, 1445, 1811, 1565, 1524, 1816};

void build_array(const char* name, vtkIntArray* array, const int c_array[])
{
  array->SetName(name);
  for (int i = 0; i < num_months; ++i)
  {
    array->InsertNextValue(c_array[i]);
  }
}

} // namespace

//----------------------------------------------------------------------------
int main(int, char*[])
{
  vtkNew<vtkNamedColors> colors;

  // Set up a 2D scene, add an XY chart to it
  vtkNew<vtkContextView> view;
  view->GetRenderWindow()->SetSize(500, 350);
  vtkNew<vtkChartXY> chart;
  view->GetScene()->AddItem(chart);

  // Create a table with some points in it...
  vtkNew<vtkTable> table;

  vtkNew<vtkIntArray> arrMonth;
  build_array("Month", arrMonth, month);
  table->AddColumn(arrMonth);

  vtkNew<vtkIntArray> arrBooks2008;
  build_array("Books 2008", arrBooks2008, book_2008);
  table->AddColumn(arrBooks2008);
  vtkNew<vtkIntArray> arrNewPopular2008;
  build_array("New / Popular 2008", arrNewPopular2008, new_popular_2008);
  table->AddColumn(arrNewPopular2008);
  vtkNew<vtkIntArray> arrPeriodical2008;
  build_array("Periodical 2008", arrPeriodical2008, periodical_2008);
  table->AddColumn(arrPeriodical2008);
  vtkNew<vtkIntArray> arrAudiobook2008;
  build_array("Audiobook 2008", arrAudiobook2008, audiobook_2008);
  table->AddColumn(arrAudiobook2008);
  vtkNew<vtkIntArray> arrVideo2008;
  build_array("Video 2008", arrVideo2008, video_2008);
  table->AddColumn(arrVideo2008);

  vtkNew<vtkIntArray> arrBooks2009;
  build_array("Books 2009", arrBooks2009, book_2009);
  table->AddColumn(arrBooks2009);
  vtkNew<vtkIntArray> arrNewPopular2009;
  build_array("New / Popular 2009", arrNewPopular2009, new_popular_2009);
  table->AddColumn(arrNewPopular2009);
  vtkNew<vtkIntArray> arrPeriodical2009;
  build_array("Periodical 2009", arrPeriodical2009, periodical_2009);
  table->AddColumn(arrPeriodical2009);
  vtkNew<vtkIntArray> arrAudiobook2009;
  build_array("Audiobook 2009", arrAudiobook2009, audiobook_2009);
  table->AddColumn(arrAudiobook2009);
  vtkNew<vtkIntArray> arrVideo2009;
  build_array("Video 2009", arrVideo2009, video_2009);
  table->AddColumn(arrVideo2009);

  // Create a color series to use with our stacks.
  vtkNew<vtkColorSeries> colorSeries1;
  colorSeries1->SetColorScheme(vtkColorSeries::WILD_FLOWER);

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

  bar = dynamic_cast<vtkPlotBar*>(chart->AddPlot(vtkChart::BAR));
  bar->SetColorSeries(colorSeries1);
  bar->SetInputData(table, "Month", "Books 2008");
  bar->SetInputArray(2, "New / Popular 2008");
  bar->SetInputArray(3, "Periodical 2008");
  bar->SetInputArray(4, "Audiobook 2008");
  bar->SetInputArray(5, "Video 2008");

  vtkNew<vtkColorSeries> colorSeries2;
  colorSeries2->SetColorScheme(vtkColorSeries::WILD_FLOWER);

  bar = dynamic_cast<vtkPlotBar*>(chart->AddPlot(vtkChart::BAR));
  bar->SetColorSeries(colorSeries2);
  bar->SetInputData(table, "Month", "Books 2009");
  bar->SetInputArray(2, "New / Popular 2009");
  bar->SetInputArray(3, "Periodical 2009");
  bar->SetInputArray(4, "Audiobook 2009");
  bar->SetInputArray(5, "Video 2009");

  chart->SetShowLegend(true);
  vtkAxis* axis = chart->GetAxis(vtkAxis::BOTTOM);
  axis->SetBehavior(1);
  axis->SetMaximum(13.0);
  axis->SetTitle("Month");
  chart->GetAxis(vtkAxis::LEFT)->SetTitle("");
  chart->SetTitle("Circulation 2008, 2009");

  // Set up the legend to be off to the top right of the viewport.
  chart->GetLegend()->SetInline(false);
  chart->GetLegend()->SetHorizontalAlignment(vtkChartLegend::RIGHT);
  chart->GetLegend()->SetVerticalAlignment(vtkChartLegend::TOP);

  // Set up some custom labels for months.
  vtkNew<vtkDoubleArray> dates;
  vtkNew<vtkStringArray> strings;
  dates->InsertNextValue(1);
  strings->InsertNextValue("January");
  dates->InsertNextValue(2);
  strings->InsertNextValue("February");
  dates->InsertNextValue(3);
  strings->InsertNextValue("March");
  dates->InsertNextValue(4);
  strings->InsertNextValue("April");
  dates->InsertNextValue(5);
  strings->InsertNextValue("May");
  dates->InsertNextValue(6);
  strings->InsertNextValue("June");
  dates->InsertNextValue(7);
  strings->InsertNextValue("July");
  dates->InsertNextValue(8);
  strings->InsertNextValue("August");
  dates->InsertNextValue(9);
  strings->InsertNextValue("September");
  dates->InsertNextValue(10);
  strings->InsertNextValue("October");
  dates->InsertNextValue(11);
  strings->InsertNextValue("November");
  dates->InsertNextValue(12);
  strings->InsertNextValue("December");
  axis->SetCustomTickPositions(dates, strings);
  axis->GetLabelProperties()->SetOrientation(90);
  axis->GetLabelProperties()->SetVerticalJustification(VTK_TEXT_CENTERED);
  axis->GetLabelProperties()->SetJustification(VTK_TEXT_RIGHT);

  // Finally render the scene and compare the image to a reference image
  view->GetRenderer()->SetBackground(colors->GetColor3d("Cornsilk").GetData());
  view->GetRenderWindow()->SetMultiSamples(0);
  view->GetRenderWindow()->Render();
  view->GetRenderWindow()->SetSize(600, 400);
  view->GetRenderWindow()->SetWindowName("StackedBar");
  view->GetInteractor()->Initialize();
  view->GetInteractor()->Start();

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(StackedBar)

find_package(VTK COMPONENTS 
  vtkChartsCore
  vtkCommonColor
  vtkCommonCore
  vtkCommonDataModel
  vtkInteractionStyle
  vtkRenderingContext2D
  vtkRenderingContextOpenGL2
  vtkRenderingCore
  vtkRenderingFreeType
  vtkRenderingGL2PSOpenGL2
  vtkRenderingOpenGL2
  vtkViewsContext2D
  QUIET
)

if (NOT VTK_FOUND)
  message("Skipping StackedBar: ${VTK_NOT_FOUND_MESSAGE}")
  return ()
endif()
message (STATUS "VTK_VERSION: ${VTK_VERSION}")
if (VTK_VERSION VERSION_LESS "8.90.0")
  # old system
  include(${VTK_USE_FILE})
  add_executable(StackedBar MACOSX_BUNDLE StackedBar.cxx )
  target_link_libraries(StackedBar PRIVATE ${VTK_LIBRARIES})
else ()
  # include all components
  add_executable(StackedBar MACOSX_BUNDLE StackedBar.cxx )
  target_link_libraries(StackedBar PRIVATE ${VTK_LIBRARIES})
  # vtk_module_autoinit is needed
  vtk_module_autoinit(
    TARGETS StackedBar
    MODULES ${VTK_LIBRARIES}
    )
endif ()

Download and Build StackedBar

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

cd StackedBar/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:

./StackedBar

WINDOWS USERS

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