QTreeWidget 查找节点

/**
 * @brief   查找与txt相同的item
 * @date    2020-11-10 10:56:33
 * @param   txt  要查找的文本
*/
void AddVistors::FindItem(const QString& txt)
{
    ui->treeWidget->collapseAll();
    if (txt.isEmpty()) {
        QTreeWidgetItemIterator it(ui->treeWidget);
        while (*it) {
            (*it)->setForeground(0, Qt::black);
            it++;
        }
        return;
    }
    if (!ui->treeWidget->topLevelItemCount()) {
        return;
    }
    QTreeWidgetItemIterator it(ui->treeWidget);
    while (*it) {
        this->setCursor(Qt::WaitCursor);
        QString str = (*it)->text(0);
        if (-1 != str.indexOf(txt)) { // 精准匹配
            QTreeWidgetItem* pItem = (*it)->parent();
            if (pItem != nullptr) {
                bool isExpanded = pItem->isExpanded();
                if (!isExpanded) {
                    ui->treeWidget->expandItem(pItem);
                }
            }
            (*it)->setForeground(0, Qt::red);
            ParentExpand(*it);
        } else {
            (*it)->setForeground(0, Qt::black);
        }
        it++;
    }
    this->setCursor(Qt::ArrowCursor);
}
/**
 * @brief   递归展开指定的节点的parent   
 * @date    2020-11-10 10:58:27
 * @param   item  树节点
*/
void AddVistors::ParentExpand(QTreeWidgetItem* item)
{
    if (item->parent() != nullptr) {
        QTreeWidgetItem* pItem = item->parent();
        if (!pItem->isExpanded()) {
            pItem->setExpanded(true);
        }
        ParentExpand(pItem);
    }
}