# TextWidget

VTKExamples/Cxx/Widgets/TextWidget

### Description

Seealso

DrawText

### Code

TextWidget.cxx

    #include <vtkSmartPointer.h>
    #include <vtkTextWidget.h>
    #include <vtkTextActor.h>
    #include <vtkSphereSource.h>
    #include <vtkPolyDataMapper.h>
    #include <vtkActor.h>
    #include <vtkTextActor.h>
    #include <vtkTextProperty.h>
    #include <vtkTextRepresentation.h>
    #include <vtkCoordinate.h>
    #include <vtkRenderer.h>
    #include <vtkRenderWindow.h>
    #include <vtkRenderWindowInteractor.h>
    #include <vtkCommand.h>

    int main(int, char *[])
    {
      // Create the RenderWindow, Renderer and both Actors
      vtkSmartPointer<vtkRenderer> renderer =
        vtkSmartPointer<vtkRenderer>::New();
      vtkSmartPointer<vtkRenderWindow> renderWindow =
        vtkSmartPointer<vtkRenderWindow>::New();
      renderWindow->AddRenderer(renderer);

      vtkSmartPointer<vtkRenderWindowInteractor> interactor =
        vtkSmartPointer<vtkRenderWindowInteractor>::New();
      interactor->SetRenderWindow(renderWindow);

      // Create a test pipeline
      vtkSmartPointer<vtkSphereSource> sphereSource =
        vtkSmartPointer<vtkSphereSource>::New();
      vtkSmartPointer<vtkPolyDataMapper> mapper =
        vtkSmartPointer<vtkPolyDataMapper>::New();
      mapper->SetInputConnection(sphereSource->GetOutputPort());
      vtkSmartPointer<vtkActor> actor =
        vtkSmartPointer<vtkActor>::New();
      actor->SetMapper(mapper);

      // Create the widget
      vtkSmartPointer<vtkTextActor> textActor =
        vtkSmartPointer<vtkTextActor>::New();
      textActor->SetInput("This is a test");
      textActor->GetTextProperty()->SetColor( 0.0, 1.0, 0.0 );

      vtkSmartPointer<vtkTextWidget> textWidget =
        vtkSmartPointer<vtkTextWidget>::New();

      vtkSmartPointer<vtkTextRepresentation> textRepresentation =
        vtkSmartPointer<vtkTextRepresentation>::New();
      textRepresentation->GetPositionCoordinate()->SetValue( .15, .15 );
      textRepresentation->GetPosition2Coordinate()->SetValue( .7, .2 );
      textWidget ->SetRepresentation( textRepresentation );

      textWidget->SetInteractor(interactor);
      textWidget->SetTextActor(textActor);
      textWidget->SelectableOff();

      // Add the actors to the renderer, set the background and size
      renderer->AddActor(actor);
      renderer->SetBackground(0.1, 0.2, 0.4);
      renderWindow->SetSize(300, 300);

      interactor->Initialize();
      renderWindow->Render();
      textWidget->On();
      renderWindow->Render();

      interactor->Start();

      return EXIT_SUCCESS;

    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 2.8)

    PROJECT(TextWidget)

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

    add_executable(TextWidget MACOSX_BUNDLE TextWidget.cxx )

    target_link_libraries(TextWidget ${VTK_LIBRARIES})

### Download and Build TextWidget

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

    cd TextWidget/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:

    ./TextWidget

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.