用C++ vtk写一段代码，在制定位置生成vtkborderwidget

好的，这是一道编程问题。下面是参考答案：

#include <vtkAutoInit.h>
VTK_MODULE_INIT(vtkRenderingOpenGL);
VTK_MODULE_INIT(vtkInteractionStyle);

#include <vtkActor.h>
#include <vtkBorderWidget.h>
#include <vtkCallbackCommand.h>
#include <vtkCommand.h>
#include <vtkInteractorStyleTrackballCamera.h>
#include <vtkNew.h>
#include <vtkPlaneSource.h>
#include <vtkPolyDataMapper.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkSmartPointer.h>
#include <vtkWidgetEvent.h>
#include <vtkWidgetEventTranslator.h>

int main(int, char *[]) {
  vtkNew<vtkPlaneSource> planeSource;
  planeSource->Update(); // forces update of output and its data

  vtkNew<vtkPolyDataMapper> planeMapper;
  planeMapper->SetInputConnection(planeSource->GetOutputPort());

  vtkNew<vtkActor> planeActor;
  planeActor->SetMapper(planeMapper);

  vtkNew<vtkRenderer> renderer;
  renderer->AddActor(planeActor);
  renderer->SetBackground(1, 1, 1); // white

  vtkNew<vtkRenderWindow> renderWindow;
  renderWindow->AddRenderer(renderer);
  renderWindow->SetSize(300, 300);

  vtkNew<vtkRenderWindowInteractor> interactor;
  interactor->SetRenderWindow(renderWindow);

  vtkNew<vtkBorderWidget> borderWidget;
  borderWidget->SetInteractor(interactor);
  borderWidget->CreateDefaultRepresentation();
  borderWidget->ResizableOn();

  vtkSmartPointer<vtkCallbackCommand> callback =
      vtkSmartPointer<vtkCallbackCommand>::New();
  callback->SetCallback([](vtkObject *caller, long unsigned int eid,
                            void *clientData, void *callData) {
    std::cout << "widget event: " << vtkCommand::GetStringFromEventId(eid)
              << std::endl;
  });

  borderWidget->AddObserver(vtkCommand::InteractionEvent, callback);

  vtkNew<vtkInteractorStyleTrackballCamera> style;
  interactor->SetInteractorStyle(style);

  // vtkWidgetEventTranslator is necessary to capture events generated by the
  // widget vtkBorderWidget, e.g., LeftButtonPressEvent
  vtkNew<vtkWidgetEventTranslator> translator;
  translator->SetTranslation(vtkCommand::LeftButtonPressEvent,
                              vtkWidgetEvent::Select);
  translator->SetTranslation(vtkCommand::LeftButtonReleaseEvent,
                              vtkWidgetEvent::EndSelect);
  translator->SetTranslation(vtkCommand::MiddleButtonPressEvent,
                              vtkWidgetEvent::Translate);
  translator->SetTranslation(vtkCommand::MiddleButtonReleaseEvent,
                              vtkWidgetEvent::EndTranslate);
  translator->SetTranslation(vtkCommand::RightButtonPressEvent,
                              vtkWidgetEvent::Scale);
  translator->SetTranslation(vtkCommand::RightButtonReleaseEvent,
                              vtkWidgetEvent::EndScale);
  translator->SetTranslation(vtkCommand::MouseWheelForwardEvent,
                              vtkWidgetEvent::Zoom);
  translator->SetTranslation(vtkCommand::MouseWheelBackwardEvent,
                              vtkWidgetEvent::Zoom);
  translator->SetTranslation(vtkCommand::MouseMoveEvent,
                              vtkWidgetEvent::MouseMove);
  translator->SetTranslation(vtkCommand::KeyPressEvent,
                              vtkWidgetEvent::KeyDown);
  translator->SetTranslation(vtkCommand::KeyReleaseEvent,
                              vtkWidgetEvent::KeyUp);
  translator->AddEventObserver(borderWidget);

  interactor->Initialize();

  borderWidget->On();
  interactor->Start();

  return 0;
}

希望这个答案能够帮助您！如果您有问题，请随时问我！