Hi

I am making a scanner such as this
http://spritesmods.com/?art=mouseeye

from the device, everything is ready. But when i tray to print this on QGraphicsView I have a memory leak...

Qt Code: 
  1. void MainWindow::parseFrame (QByteArray DATA){
  2.  
  3.  
  4.     bool frameOK = true;
  5.     QList <QByteArray> line = DATA.split('\n');
  6.  
  7. //DATA structure
  8. //
  9. //BO:
  10. //DE: 2bits x movement, y movement
  11. //SQ: 1bit Surface Quality 
  12. //MI:  1bit
  13. //MA: 1bit
  14. //FR: 324bits ( SOF | Data_Valid | PD5 | PD4 | PD3 | PD2 | PD1 | PD0 ) where PDx intensity of pixel in gray scale
  15. //EO:
  16.  
  17.  
  18.     for (int w = 0 ; w < line.size() ; w++)
  19.     {
  20.         if ( line.at(w).startsWith("FR:") && frameOK ) //Jeżeli dane są ramką
  21.         {
  22.             QList <QByteArray> frame = line.at(w).split(':');
  23.  
  24.             if ( (frame.at(1).size() < 324) || (frame.at(1).size()>324 ))
  25.             {
  26.                 qDebug()<<"Frame damaged :"<<frame.at(1).size();
  27.                 ramkaOK = false;
  28.             }//IF
  29.             else
  30.             {
  31.                 scene->clear(); // !!!!!!!!
  32.                 quint8 col;
  33.                 quint16 pixelIndex;
  34.                 for( pixelIndex = 0 ; pixelIndex < 18*18 ; ){
  35.                     col = (quint8)(frame.at(1)[pixelIndex] << 2 );
  36.                     color->setRgb(col,col,col);
  37.                     brush->setColor(*color);
  38.                     //That section works well
  39.                     scene->addRect( ((quint8)(pixelIndex/18))*7, //X
  40.                                     (17 - (pixelIndex%18))*7,    //Y
  41.                                     7,7,*pen,*brush );
  42.                     //This section will leak memory, because I add data instead of overwriting
  43.                     bigScene->addRect(((quint8)(pixelIndex/18))+X, //x + DELTA X
  44.                                       (17 - (pixelIndex%18))+Y,    //y + DELTA Y
  45.                                       1,1,*pen,*brush );
  46.                 }
  47.             } //ELSE Frame OK
  48.         }//FRAME
  49.         if ( line.at(w).startsWith("DE:") ) //DELTA
  50.         {
  51.             QList <QByteArray> delta = line.at(w).split(':');
  52.  
  53.             dx = delta.at(1)[0];
  54.             dy = delta.at(1)[1];
  55.             if ( ((dx > -127) && ( dx < 128 )) &&
  56.                  ((dx > -127) && ( dx < 128 )) ){
  57.                 X+=dx;
  58.                 Y-=dy;
  59.             }
  60.             else
  61.             {
  62.                 qDebug()<< "DX DY damaged" ;
  63.                 frameOK = false;
  64.             }
  65.  
  66.         } //IF DELTA
  67.  
  68.      //ui->currentView is a QGraphicView
  69.      ui->currentView->setScene(scene); 
  70.      // ui->bigView->setScene(bigScene); //This causes a memory leak
  71.      ui->sourceQuality->replot();
  72.      ui->minMaxVal->replot();
  73.  
  74. }
To copy to clipboard, switch view to plain text mode 

My question is, how can I draw the big picture?