#include <QtQml/QQmlApplicationEngine>

#include <QtQuick/QQuickWindow>

#include <QtGui/QGuiApplication>
#include <QtGui/QSurfaceFormat>

#include <QQuickVTKItem.h>
#include <QVTKRenderWindowAdapter.h>

#include <vtkActor.h>
#include <vtkConeSource.h>
#include <vtkPolyDataMapper.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>

struct MyVtkItem : QQuickVTKItem
{
  vtkUserData initializeVTK(vtkRenderWindow* renderWindow) override
  {
    // Create a cone pipeline and add it to the view
    vtkNew<vtkConeSource> cone;

    vtkNew<vtkPolyDataMapper> mapper;
    mapper->SetInputConnection(cone->GetOutputPort());

    vtkNew<vtkActor> actor;
    actor->SetMapper(mapper);

    vtkNew<vtkRenderer> renderer;
    renderer->AddActor(actor);
    renderer->ResetCamera();
    renderer->SetBackground(0.0, 1.0, 1.0);
    renderer->SetBackground2(1.0, 0.0, 0.0);
    renderer->SetGradientBackground(true);

    renderWindow->AddRenderer(renderer);
    renderWindow->SetMultiSamples(16);

    return nullptr;
  }
};

int main(int argc, char* argv[])
{
  QQuickVTKItem::setGraphicsApi();

#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
  QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
#endif

  QGuiApplication app(argc, argv);

  qmlRegisterType<MyVtkItem>("com.vtk.example", 1, 0, "MyVtkItem");

  QQmlApplicationEngine engine;
  engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
  if (engine.rootObjects().isEmpty())
    return -1;

  return app.exec();
}