Form1 qdatetime.h QListViewItem *item; Form1 0 0 281 455 Form1 unnamed 11 6 number Column 1 true true listview number returnPressed() Form1 doInsert() init() destroy() doInsert() { qDebug( "here" ); item = 0; } { } { item = new QListViewItem( listview, "Hallo" ); item->setOpen( TRUE ); listview->clear(); int num = number->text().toInt(); QTime t; t.start(); qDebug( "start" ); for ( int i = 0; i < num; ++i ) (void)new QListViewItem( listview, "Item " ); qDebug( "end items: %d took %d msec", num, t.elapsed() ); }