TextWidget

VTKExamples/Java/Widgets/TextWidget


Description

vtkTextWidget object provides support for interactively placing text on the 2D overlay plane.

The text is defined by an instance of vtkTextActor object.

Other Languages

See (Cxx), (Python)

Question

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Code

TextWidget.java

import vtk.vtkRenderWindow;
import vtk.vtkActor;
import vtk.vtkNativeLibrary;
import vtk.vtkPolyDataMapper;
import vtk.vtkNamedColors;
import vtk.vtkRenderer;
import vtk.vtkSphereSource;
import vtk.vtkRenderWindowInteractor;
import vtk.vtkTextActor;
import vtk.vtkTextRepresentation;
import vtk.vtkTextWidget;


public class TextWidget 
{

  //-----------------------------------------------------------------
  // Load VTK library and print which library was not properly loaded
  static 
  {
    if (!vtkNativeLibrary.LoadAllNativeLibraries()) 
    {
      for (vtkNativeLibrary lib : vtkNativeLibrary.values()) 
      {
         if (!lib.IsLoaded()) 
        {
          System.out.println(lib.GetLibraryName() + " not loaded");
        }
      }
    }
   vtkNativeLibrary.DisableOutputWindow(null);
  }
 // -----------------------------------------------------------------

 public static void main(String args[]) 
 {

    vtkNamedColors colors = new vtkNamedColors();

    //For Actor Color
    double actorColor[] = new double[4];

    //Renderer Background Color
    double Bgcolor[] = new double[4];

    //TextColor 
    double TextColor[] = new double[4];

    colors.GetColor("DimGray", actorColor);
    colors.GetColor("MidnightBlue", Bgcolor);
    colors.GetColor("Yellow", TextColor);

    // Create the renderer, render window and interactor.
    vtkRenderer ren = new vtkRenderer();
    vtkRenderWindow renWin = new vtkRenderWindow();
    renWin.AddRenderer(ren);
    vtkRenderWindowInteractor iren = new vtkRenderWindowInteractor();
    iren.SetRenderWindow(renWin);

    //Create a Sphere
    vtkSphereSource Sphere = new vtkSphereSource();
    Sphere.Update();

    //Create a Mapper and Actor
    vtkPolyDataMapper Mapper = new vtkPolyDataMapper();
    Mapper.SetInputConnection(Sphere.GetOutputPort());

    vtkActor Actor = new vtkActor();
    Actor.SetMapper(Mapper);
    Actor.GetProperty().SetColor(actorColor);

    // Create the text widget
    vtkTextActor TextActor = new vtkTextActor();
    TextActor.SetInput("This is a Sphere");
    TextActor.GetTextProperty().SetColor(TextColor);
    TextActor.GetTextProperty().SetFontFamilyToCourier();

    vtkTextWidget TextWidget = new vtkTextWidget();

    vtkTextRepresentation TextRepresentation = new vtkTextRepresentation();
    TextRepresentation.GetPositionCoordinate().SetValue(0.15, 0.15);
    TextRepresentation.GetPosition2Coordinate().SetValue(0.7, 0.2);
    TextWidget.SetRepresentation(TextRepresentation);
    TextWidget.SetInteractor(iren);
    TextWidget.SetTextActor(TextActor);
    TextWidget.SelectableOff();


    //Visualize the actor
    ren.AddActor(Actor);
    ren.SetBackground(Bgcolor);

    renWin.SetSize(300, 300);
    renWin.Render();
    TextWidget.On();

    iren.Initialize();
    iren.Start();
  }  
}