QTreeWidget设置item的内容,该怎么处理

QTreeWidget* treewidget = new QTreeWidget(this);
QTreeWidgetItem* item1  = new QTreeWidgetItem(treewidget);
QTreeWidgetItem* item2  = new QTreeWidgetItem(treewidget);

QString dst("Destination address");
QString src("Source address");
dst.append("=11-22-33-44-55-66");
src.append("=77-88-99-aa-bb-cc");
padString( dst, 25 );
padString( src, 25 );

item1->setText( 0, dst );
item2->setText( 0, src );

void padString( QString& str, int strlen )
{
   int len = str.size();
   QChar fillChar( ' ' );
   for( int i= 0; i < ( strlen - len ); i++ )
   {
      str.append( fillChar );
   }
}