VTK/Examples/Cxx/Utilities/ConstructTable
This example creates a 3x3 table. The columns MUST be added first - if you attempt to call AddRow type functions, they will not do anything (or produce errors) because the table still has 0 columns until you tell it otherwise. This example adds 3 empty columns to the table, then goes back and fills them in.
Warning: the table does not copy the data, so if you add the SAME column to the table each time, i.e.
vtkSmartPointer<vtkVariantArray> col = vtkSmartPointer<vtkVariantArray>::New();
col->InsertNextValue(vtkVariant(0.0));
col->InsertNextValue(vtkVariant(0.0));
col->InsertNextValue(vtkVariant(0.0));
table->AddColumn(Col);
table->AddColumn(Col);
table->AddColumn(Col);
If you modify one of the entries in the table with Table->SetValue ( r,c, vtkVariant ( counter ) ); after they have all been set to the same column, the rth entry in EVERY column will be changed.
Contents
ConstructTable.cxx
#include <vtkTable.h>
#include <vtkVariant.h>
#include <vtkVariantArray.h>
#include <vtkSmartPointer.h>
int main(int, char *[])
{
//construct an empty table
vtkSmartPointer<vtkTable> table =
vtkSmartPointer<vtkTable>::New();
for ( unsigned int i = 0; i < 3; i++ )
{
vtkSmartPointer<vtkVariantArray> col =
vtkSmartPointer<vtkVariantArray>::New();
col->InsertNextValue ( vtkVariant ( 0.0 ) );
col->InsertNextValue ( vtkVariant ( 0.0 ) );
col->InsertNextValue ( vtkVariant ( 0.0 ) );
table->AddColumn ( col );
}
//fill the table with values
unsigned int counter = 0;
for(vtkIdType r = 0; r < table->GetNumberOfRows(); r++ )
{
for(vtkIdType c = 0; c < table->GetNumberOfColumns(); c++ )
{
table->SetValue ( r,c, vtkVariant ( counter ) );
counter++;
}
}
//print information about the table
std::cout << "NumRows: " << table->GetNumberOfRows() << std::endl;
std::cout << "NumCols: " << table->GetNumberOfColumns() << std::endl;
//display the table
table->Dump ( 3 );
//access elements of the table
for(vtkIdType r = 0; r < table->GetNumberOfRows(); r++ )
{
for(vtkIdType c = 0; c < table->GetNumberOfColumns(); c++ )
{
vtkVariant v = table->GetValue( r,c);
std::cout << "(r,c) = (" << r << "," << c << ") = " << v << std::endl;
}
}
return EXIT_SUCCESS;
}
Please try the new VTKExamples website.
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(ConstructTable)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(ConstructTable MACOSX_BUNDLE ConstructTable.cxx)
if(VTK_LIBRARIES)
target_link_libraries(ConstructTable ${VTK_LIBRARIES})
else()
target_link_libraries(ConstructTable vtkHybrid vtkWidgets)
endif()
Download and Build ConstructTable
Click here to download ConstructTable. and its CMakeLists.txt file.
Once the tarball ConstructTable.tar has been downloaded and extracted,
cd ConstructTable/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:
./ConstructTable
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.