ReadDICOMQt::ReadDICOMQt(QWidget *parent) : QMainWindow(parent), ui(new Ui::ReadDICOMQt) {
ui->setupUi(this);
reader = vtkSmartPointer<vtkDICOMImageReader>::New();
viewer = vtkSmartPointer<vtkImageViewer>::New();

m_Connections = vtkEventQtSlotConnect::New();
m_Connections->Connect(m_QVTKWidget->GetRenderWindow()->GetInteractor(),
             vtkCommand::MouseMoveEvent,
             this,
             SLOT(updateCoords(vtkObject*)));

//vtkNew<vtkGenericOpenGLRenderWindow> renderWindow;
//vtkNew<vtkRenderer> renderer;
//vtkNew<vtkImageSlice> imageSlice;
//vtkNew<vtkImageResliceMapper> mapper;
//vtkNew<vtkInteractorStyleImage> interactorStyle;
}

ReadDICOMQt::~ReadDICOMQt() {
delete ui;
}

void ReadDICOMQt::openDICOMFile() {
QString fileNameDICOM = QFileDialog::getOpenFileName(this, tr("Select DICOM File"), QDir::currentPath());
drawDICOMImage(fileNameDICOM.toUtf8().constData());
}
void ReadDICOMQt::updateCoords(int obj){
// 获取交互器
vtkRenderWindowInteractor iren = vtkRenderWindowInteractor::SafeDownCast(obj);

// 获取鼠标的当前位置
int event_pos[2];
iren->GetEventPosition(event_pos);

QString str;
str.sprintf("x=%d : y=%d", event_pos[0], event_pos[1]);
m_StatusBar->showMessage(str);

}
void ReadDICOMQt::drawDICOMImage(std::string fileDICOM) {
// 获取DICOM图像的文件夹
reader->SetFileName(fileDICOM.c_str());
reader->Update();
// 将输入与viewer结合起来
viewer->SetInputConnection(reader->GetOutputPort());
// 将widght 链接到viewer
ui->qvtkWidget->SetRenderWindow(viewer->GetRenderWindow());
//向viewer添加interactor
viewer->SetupInteractor(ui->qvtkWidget->GetInteractor());
// init
viewer->Render();

// 更新GUI label
ui->labelFileName->setText(QString::fromStdString(fileDICOM));

}

void ReadDICOMQt::on_buttonOpenFile_clicked() {
openDICOMFile();
}
//ReadDICOM.h
#ifndef READDICOMQT_H
#define READDICOMQT_H

#include <QMainWindow>
#include <vtkSmartPointer.h>
#include <vtkDICOMImageReader.h>
#include <vtkImageViewer.h>

namespace Ui {
class ReadDICOMQt;
}

class ReadDICOMQt : public QMainWindow {
Q_OBJECT

public:
explicit ReadDICOMQt(QWidget *parent = 0);
~ReadDICOMQt();

private slots:
void openDICOMFile();
void drawDICOMImage(std::string fileDICOM);
void on_buttonOpenFile_clicked();
void updateCoords(vtkObject* obj);

private:
Ui::ReadDICOMQt ui;
vtkSmartPointer<vtkDICOMImageReader> reader;
vtkSmartPointer<vtkImageViewer> viewer;
vtkEventQtSlotConnect m_Connections;
};
#endif // READDICOMQT_H

The error occurred  when I make the makefile