ah, yes, my apologies that code wasn't correct....
Qt Code: 
  1. // make the ListWidgetItems, and assign them to the list_widget
  2.       QListWidgetItem *padd1 = new QListWidgetItem("item 1", list_widget);
  3.       QListWidgetItem *padd2 = new QListWidgetItem("item 2", list_widget);
  4.       QListWidgetItem *padd3 = new QListWidgetItem("item 3", list_widget);
  5.       QListWidgetItem *padd4 = new QListWidgetItem("item 4", list_widget);
  6.  
  7.       // add a QVariant to the LIstWidgetItem
  8.       padd1->setData(Qt::UserRole, QVariant(1));
  9.       padd2->setData(Qt::UserRole, QVariant(2));
  10.       padd3->setData(Qt::UserRole, QVariant(3));
  11.       padd4->setData(Qt::UserRole, QVariant(4));
  12.  
  13.       // to get that number back out
  14.       list_widget->item(selected_list_widget)->data(Qt::UserRole).toInt();
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