# RenderWindowNoUiFile

VTKExamples/Cxx/Qt/RenderWindowNoUiFile

### Description

This is a very basic example that shows how to create a Qt window. Typically, one would want to design a form in the QtDesigner (this is shown in RenderWindowUi)

### Code

RenderWindowNoUiFile.cxx

    #include <QApplication>

    #include <vtkActor.h>
    #include <vtkGenericOpenGLRenderWindow.h>
    #include <vtkNew.h>
    #include <vtkPolyDataMapper.h>
    #include <vtkRenderWindow.h>
    #include <vtkRenderer.h>
    #include <vtkSphereSource.h>

    #include <QVTKOpenGLWidget.h>
    #include <QSurfaceFormat>

    int main(int argc, char** argv)
    {
      // needed to ensure appropriate OpenGL context is created for VTK rendering.
      QSurfaceFormat::setDefaultFormat(QVTKOpenGLWidget::defaultFormat());

      QApplication app(argc, argv);

      QVTKOpenGLWidget widget;
      vtkNew<vtkGenericOpenGLRenderWindow> renderWindow;
      widget.SetRenderWindow(renderWindow);

      widget.resize( 256, 256 );

      vtkNew<vtkSphereSource> sphereSource;

      vtkNew<vtkPolyDataMapper> sphereMapper;
      sphereMapper->SetInputConnection( sphereSource->GetOutputPort() );

      vtkNew<vtkActor> sphereActor;
      sphereActor->SetMapper( sphereMapper );

      vtkNew<vtkRenderer> renderer;
      renderer->AddActor( sphereActor );

      widget.GetRenderWindow()->AddRenderer( renderer );
      widget.show();

      app.exec();

      return EXIT_SUCCESS;
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 2.8)

    PROJECT(RenderWindowNoUiFile)

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

    add_executable(RenderWindowNoUiFile MACOSX_BUNDLE RenderWindowNoUiFile.cxx )

    target_link_libraries(RenderWindowNoUiFile ${VTK_LIBRARIES})

### Download and Build RenderWindowNoUiFile

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

    cd RenderWindowNoUiFile/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:

    ./RenderWindowNoUiFile

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.