BarChart
Question
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Code¶
BarChart.cxx
#include <vtkVersion.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkSmartPointer.h>
#include <vtkChartXY.h>
#include <vtkPlot.h>
#include <vtkAxis.h>
#include <vtkTable.h>
#include <vtkTextProperty.h>
#include <vtkIntArray.h>
#include <vtkContextView.h>
#include <vtkContextScene.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkColorSeries.h>
#include <vtkNamedColors.h>
#include <vtkColor.h>
// 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*[] )
{
// Colors
vtkNew<vtkColorSeries> colorSeries;
colorSeries->SetColorScheme(vtkColorSeries::BREWER_SEQUENTIAL_YELLOW_ORANGE_BROWN_3);
colorSeries->SetColorScheme(vtkColorSeries::BREWER_DIVERGING_SPECTRAL_3);
colorSeries->SetColorScheme(vtkColorSeries::BREWER_DIVERGING_BROWN_BLUE_GREEN_3);
colorSeries->SetColorScheme(vtkColorSeries::BREWER_SEQUENTIAL_BLUE_GREEN_3);
colorSeries->SetColorScheme(vtkColorSeries::BREWER_SEQUENTIAL_BLUE_PURPLE_3);
colorSeries->SetColorScheme(vtkColorSeries::BREWER_DIVERGING_PURPLE_ORANGE_3);
vtkNew<vtkNamedColors> colors;
vtkColor3d backgroundColor = colors->GetColor3d("Sienna");
vtkColor3d axisColor = colors->GetColor3d("Wheat");
vtkColor3d titleColor = colors->GetColor3d("Wheat");
// Set up a 2D scene, add an XY chart to it
vtkNew<vtkContextView> view;
view->GetRenderer()->SetBackground(backgroundColor.GetData());
view->GetRenderWindow()->SetSize(640, 480);
vtkNew<vtkChartXY> chart;
view->GetScene()->AddItem(chart);
// Set various properties
vtkAxis *xAxis = chart->GetAxis(vtkAxis::BOTTOM);
xAxis->SetTitle("Monthly");
xAxis->GetTitleProperties()->SetColor(axisColor.GetData());
xAxis->GetTitleProperties()->SetFontSize(16);
xAxis->GetTitleProperties()->ItalicOn();
xAxis->GetLabelProperties()->SetColor(axisColor.GetData());
vtkAxis *yAxis = chart->GetAxis(vtkAxis::LEFT);
yAxis->SetTitle("Circulation");
yAxis->GetTitleProperties()->SetColor(axisColor.GetData());
yAxis->GetTitleProperties()->SetFontSize(16);
yAxis->GetTitleProperties()->ItalicOn();
yAxis->GetLabelProperties()->SetColor(axisColor.GetData());
chart->SetTitle("Circulation 2008, 2009, 2010");
chart->GetTitleProperties()->SetFontSize(24);
chart->GetTitleProperties()->SetColor(titleColor.GetData());
chart->GetTitleProperties()->BoldOn();
// Create a table with some points in it...
vtkNew<vtkTable> table;
vtkNew<vtkIntArray> arrMonth;
arrMonth->SetName("Month");
table->AddColumn(arrMonth);
vtkNew<vtkIntArray> arr2008;
arr2008->SetName("2008");
table->AddColumn(arr2008);
vtkNew<vtkIntArray> arr2009;
arr2009->SetName("2009");
table->AddColumn(arr2009);
vtkNew<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);
line->SetColor(colorSeries->GetColor(0).GetRed()/255.0,
colorSeries->GetColor(0).GetGreen()/255.0,
colorSeries->GetColor(0).GetBlue()/255.0);
line->SetInputData(table, 0, 1);
line = chart->AddPlot(vtkChart::BAR);
line->SetColor(colorSeries->GetColor(1).GetRed()/255.0,
colorSeries->GetColor(1).GetGreen()/255.0,
colorSeries->GetColor(1).GetBlue()/255.0);
line->SetInputData(table, 0, 2);
line = chart->AddPlot(vtkChart::BAR);
line->SetColor(colorSeries->GetColor(2).GetRed()/255.0,
colorSeries->GetColor(2).GetGreen()/255.0,
colorSeries->GetColor(2).GetBlue()/255.0);
line->SetInputData(table, 0, 3);
//Finally render the scene and compare the image to a reference image
view->GetRenderWindow()->SetMultiSamples(0);
view->GetRenderWindow()->Render();
view->GetInteractor()->Initialize();
view->GetInteractor()->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt¶
cmake_minimum_required(VERSION 3.3 FATAL_ERROR)
project(BarChart)
find_package(VTK COMPONENTS
vtkvtkChartsCore
vtkvtkCommonColor
vtkvtkCommonCore
vtkvtkCommonDataModel
vtkvtkInteractionStyle
vtkvtkRenderingContext2D
vtkvtkRenderingContextOpenGL2
vtkvtkRenderingCore
vtkvtkRenderingFreeType
vtkvtkRenderingGL2PSOpenGL2
vtkvtkRenderingOpenGL2
vtkvtkViewsContext2D QUIET)
if (NOT VTK_FOUND)
message("Skipping BarChart: ${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(BarChart MACOSX_BUNDLE BarChart.cxx )
target_link_libraries(BarChart PRIVATE ${VTK_LIBRARIES})
else ()
# include all components
add_executable(BarChart MACOSX_BUNDLE BarChart.cxx )
target_link_libraries(BarChart PRIVATE ${VTK_LIBRARIES})
# vtk_module_autoinit is needed
vtk_module_autoinit(
TARGETS BarChart
MODULES ${VTK_LIBRARIES}
)
endif ()
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.