CaptionWidget

VTKExamples/Cxx/Widgets/CaptionWidget


Code

CaptionWidget.cxx

#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkPolyData.h>
#include <vtkSmartPointer.h>
#include <vtkSphereSource.h>
#include <vtkCaptionWidget.h>
#include <vtkCaptionRepresentation.h>
#include <vtkCaptionActor2D.h>
#include <vtkTextActor.h>
#include <vtkTextProperty.h>

int main(int, char *[])
{
  // Sphere
  vtkSmartPointer<vtkSphereSource> sphereSource = 
    vtkSmartPointer<vtkSphereSource>::New();
  sphereSource->Update();

  vtkSmartPointer<vtkPolyDataMapper> mapper = 
    vtkSmartPointer<vtkPolyDataMapper>::New();
  mapper->SetInputConnection(sphereSource->GetOutputPort());

  vtkSmartPointer<vtkActor> actor = 
    vtkSmartPointer<vtkActor>::New();
  actor->SetMapper(mapper);

  // A renderer and render window
  vtkSmartPointer<vtkRenderer> renderer = 
    vtkSmartPointer<vtkRenderer>::New();
  vtkSmartPointer<vtkRenderWindow> renderWindow = 
    vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->AddRenderer(renderer);

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

  // Create the widget and its representation
  vtkSmartPointer<vtkCaptionRepresentation> captionRepresentation = 
    vtkSmartPointer<vtkCaptionRepresentation>::New();
  captionRepresentation->GetCaptionActor2D()->SetCaption("Test caption");
  captionRepresentation->GetCaptionActor2D()->GetTextActor()->GetTextProperty()->SetFontSize(100);

  double pos[3] = {.5,0,0};
  captionRepresentation->SetAnchorPosition(pos);

  vtkSmartPointer<vtkCaptionWidget> captionWidget = 
    vtkSmartPointer<vtkCaptionWidget>::New();
  captionWidget->SetInteractor(renderWindowInteractor);
  captionWidget->SetRepresentation(captionRepresentation);

  // Add the actors to the scene
  renderer->AddActor(actor);
  renderer->SetBackground(1,0,0);

  renderWindow->Render();
  captionWidget->On();

  // Begin mouse interaction
  renderWindowInteractor->Start();

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(CaptionWidget)

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

add_executable(CaptionWidget MACOSX_BUNDLE CaptionWidget.cxx )

target_link_libraries(CaptionWidget ${VTK_LIBRARIES})

Download and Build CaptionWidget

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

cd CaptionWidget/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:

./CaptionWidget

WINDOWS USERS

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