QTreeWidgetItem* lpItem = new QTreeWidgetItem(this);
lpItem->setText(0, "test string");

QTableWidget* lpTable = new QTableWidget();
MyTableDelegate* lpDel = new MyTableDelegate(lpTable);
lpTable->setItemDelegate(lpDel);
lpTable->setColumnCount(5);
lpTable->setRowCount(1);

lpTable->setAutoFillBackground(true);

for(int index = 0; index < 5; ++index)
{
QTableWidgetItem* lpItem = new QTableWidgetItem();
lpItem->setSizeHint(QSize(20, 20));
lpTable->setItem(0, index, lpItem);
lpTable->setColumnWidth(index, 20);
}

lpTable->setRowHeight(0, 20);
lpTable->setGeometry(0, 0, 100, 20);

setItemWidget(lpItem, 1, lpTable);
lpTable->verticalHeader()->resizeSection(0, 25);