Qt&Vtk-010-Cone5

#ifndef CONE5_H
#define CONE5_H
#include <QWidget>
#include <QTimer>
#include <QDebug>
#include <QString>
#include <QTextBrowser>
#include "QVTKOpenGLWidget.h"               //新版本，旧版QVTKWidget
#include "vtkAutoInit.h"
#include "vtkConeSource.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkInteractorStyleTrackballCamera.h"
#include "vtkPolyDataMapper.h"
#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkActor.h"
#include "vtkCamera.h"
namespace Ui {
class Cone5;
}
class Cone5 : public QWidget
{
    Q_OBJECT
public:
    explicit Cone5(QWidget *parent = 0);
    ~Cone5();
    void startiren();
private:
    Ui::Cone5 *ui;
    vtkConeSource *cone = nullptr;
    vtkPolyDataMapper *mapper = nullptr;
    vtkActor *actor = nullptr;
    vtkRenderer *render = nullptr;
    vtkRenderWindowInteractor *iren = nullptr;
    vtkInteractorStyleTrackballCamera *style = nullptr;
};
#endif // CONE5_H

#include "cone5.h"
#include "ui_cone5.h"
Cone5::Cone5(QWidget *parent) :QWidget(parent),ui(new Ui::Cone5)
{
    ui->setupUi(this);
    cone = vtkConeSource::New();
    cone->SetRadius(1);
    cone->SetResolution(100);
    cone->SetHeight(5);
    mapper = vtkPolyDataMapper::New();
    mapper->SetInputConnection(cone->GetOutputPort());
    actor = vtkActor::New();
    actor->SetMapper(mapper);
    render = vtkRenderer::New();
    render->AddActor(actor);
    render->SetBackground(0,1,0);
    ui->widget->GetRenderWindow()->AddRenderer(render);
    iren = vtkRenderWindowInteractor::New();
    iren->SetRenderWindow(ui->widget->GetRenderWindow());
    style = vtkInteractorStyleTrackballCamera::New();
    iren->SetInteractorStyle(style);
    iren->Initialize();
//    iren->Start();                //在Qt中无法跑起来，这里需要看下Start的源码
    /*
    void vtkRenderWindowInteractor::Start()
    {
      // Let the compositing handle the event loop if it wants to.
      if (this->HasObserver(vtkCommand::StartEvent) && !this->HandleEventLoop)
      {
        this->InvokeEvent(vtkCommand::StartEvent,nullptr);
        return;
      }
      // As a convenience, initialize if we aren't initialized yet.
      if (!this->Initialized)
      {
        this->Initialize();
        if (!this->Initialized)
        {
          return;
        }
      }
      // Pass execution to the subclass which will run the event loop,
      // this will not return until TerminateApp is called.
      this->StartEventLoop();
    }
*/
}
Cone5::~Cone5()
{
    delete ui;
}
void Cone5::startiren()
{
    iren->Start();
}

void vtkRenderWindowInteractor::Start()
{
  // Let the compositing handle the event loop if it wants to.
  if (this->HasObserver(vtkCommand::StartEvent) && !this->HandleEventLoop)
  {
    this->InvokeEvent(vtkCommand::StartEvent,nullptr);
    return;
  }
  // As a convenience, initialize if we aren't initialized yet.
  if (!this->Initialized)
  {
    this->Initialize();
    if (!this->Initialized)
    {
      return;
    }
  }
  // Pass execution to the subclass which will run the event loop,
  // this will not return until TerminateApp is called.
  this->StartEventLoop();
}