Slide Show using QGraphicscene

I want to show slide show images for every 1 sec(Default).But the application was close completely after 4 Hours.I will explain how i did this?

I Create a ads_displayprocess.cpp and it contains,

Code:

void MainWindow::display_ads()
{
  //!  this function will display images in qframe.
 
    static int NextImage;   //!! declare image count
    Reset = &NextImage; //!! move to pointer
    if(AdsImageAddress.count() > 0)  //! check it no file
    {
        QPixmap ImageData(AdsImageAddress.at(NextImage)); //! put file in pixmap
        QGraphicsScene * ImageScene = new QGraphicsScene(); //! create a graphics scene
        ui->ImageView->setScene(ImageScene);   //! add graphicsview to scene
        QGraphicsPixmapItem * AdsImage = new QGraphicsPixmapItem(ImageData.scaled(ui->ads->width()-30,ui->ads->height()-30, Qt::IgnoreAspectRatio, Qt::FastTransformation)); //! add pixmap to graphicspixmap
        ImageScene->addItem(AdsImage); //! add scene to graphics view
        ui->ImageView->show();  //! show image
        NextImage++; //! repeat process
        NextImage = (NextImage == AdsImageAddress.count()) ? (0):(NextImage); //! check for image count
    }
    else //! if no path is found
    {
       // throw "No PATH Define"; //! throw a exception
        Ads_PATH_PROCESS("/home/pi/DataImage"); // set default path
        display_ads();  // display ads again.
    }
}
 
void MainWindow::Ads_PATH_PROCESS(QString PATH)
//! this function make path to image
{
 
    AdsImageAddress.clear(); //! clear the list
    QDir AdsDir(PATH); //! get the path
 
    QStringList Filter, PathFile; //! create new strings
 
    Filter << "*.png" <<"*.jpg" <<"*.jpeg";   //! filter the dir with images
    AdsDir.setNameFilters(Filter);  //! fileter process
 
    PathFile = AdsDir.entryList(QDir::Files | QDir::NoDotAndDotDot | QDir::NoSymLinks); //! get only files
 
    if(PathFile.count() > 0) //! if images are found
    {
        PATH+="/"; //! add a path variable if missing
        foreach(QString list,PathFile) //! for each image path
        {
            AdsImageAddress.append(PATH+list)  ;   //! add path and file name to list
        }
    }
    *Reset = 0; //! reset NextImage so the pointer Reset Data.
 
#ifdef DEBUG
    qDebug() <<"mainwindow.cpp : "<< "Ads PATH: " << PATH <<endl;
#endif
}

In mainwindow.cpp contains

Code:

QThread *AdsTimeThread = new QThread(this); // init this timer thread
    AdsTime = new QTimer;   // created a new timer
    AdsTime->start(); // start the timer
 
    AdsTime->setInterval(ads_window->AdsInterval * 1000); // add interval, by default 1000 = 1sec
    AdsTime->moveToThread(AdsTimeThread); // add timer to thread
    AdsTimeThread->start(); 
    AdsTimeThread->connect(AdsTime,SIGNAL(timeout()),this,SLOT(display_ads()));

So Is it any wrong with this code?I dont know how it exist after 4 hrs.So i need your help for solve this kind of problem.