Following code worked.

Qt Code: 
  1. #include "mysample.h"
  2.  
  3. MySample::MySample(QWidget *parent) :
  4.     QWidget(parent)
  5. {
  6.     QWidget *wid = new QWidget;
  7.     QGridLayout *gridLay = new QGridLayout(wid);
  8.  
  9.     int col=0;
  10.     int row=0;
  11.     for(int i=0; i<100; i++){
  12.         QLabel *lb = new QLabel("Label "+QString::number(i));
  13.         gridLay->addWidget(lb,row,col);
  14.         col++;
  15.         if (col==4){
  16.             col=0;
  17.             row++;
  18.         }
  19.         QLineEdit *tx = new QLineEdit;
  20.         gridLay->addWidget(tx,row,col);
  21.         col++;
  22.         if (col==4){
  23.             col=0;
  24.             row++;
  25.         }
  26.     }
  27.     QScrollArea *scroll = new QScrollArea;
  28.     wid->setBackgroundRole(QPalette::Dark);
  29.     scroll->setWidgetResizable(true);
  30.     QHBoxLayout *hb1 = new QHBoxLayout();
  31.     scroll->setLayout(hb1);
  32.     scroll->setWidget(wid);
  33.  
  35.     hb2->addWidget(scroll);
  36.     setLayout(hb2);
  37.  
  38. }
To copy to clipboard, switch view to plain text mode