【Qt】QTableWidget设置可以选择多行多列，并能复制选择的内容到剪贴板

比如有一个 QTableWidget*m_tbwQuery

m_tbwQuery->installEventFilter(this); //进行事件过滤处理//设置可以选择多行多列
m_tbwQuery->setSelectionMode(QAbstractItemView::MultiSelection); 
m_tbwQuery->setSelectionBehavior(QAbstractItemView::SelectItems); 
m_tbwQuery->setFocusPolicy(Qt::StrongFocus);  // 或者 Qt::ClickFocus 或 Qt::TabFocus//点击后，取消原来选择的
connect(m_tbwQuery, &QTableWidget::itemPressed, [=](QTableWidgetItem* item){if (item) {m_tbwQuery->clearSelection();m_tbwQuery->setSelectionMode(QAbstractItemView::MultiSelection);m_tbwQuery->setCurrentItem(item);item->setSelected(true);}});// 双击选择一行
connect(m_tbwQuery, &QTableWidget::itemDoubleClicked, [=](QTableWidgetItem* item) {if (item) {m_tbwQuery->clearSelection();m_tbwQuery->setSelectionMode(QAbstractItemView::MultiSelection);m_tbwQuery->selectRow(item->row());}});

在事件过滤中处理键盘事件，快捷键是Ctrl+C

/// 事件过滤
bool QueryDataTable::eventFilter(QObject* obj, QEvent* event) 
{if (obj == m_tbwQuery){if (event->type() == QEvent::KeyPress) {QKeyEvent* keyEvent = static_cast<QKeyEvent*>(event);if (keyEvent->matches(QKeySequence::Copy)) {copySelectedCellsToClipboard();return true;  // Event handled}}}return QObject::eventFilter(obj, event);
}

最后是实现复制到剪贴板的函数

// 复制选定单元格内容到剪贴板的函数
void QueryDataTable::copySelectedCellsToClipboard() 
{QItemSelectionModel* selectionModel = m_tbwQuery->selectionModel();QModelIndexList indexes = selectionModel->selectedIndexes();if (!indexes.isEmpty()) {qSort(indexes); // 为了确保数据按照视觉顺序排序QString text;QModelIndex previous = indexes.first();QModelIndex current;foreach(const QModelIndex & index, indexes) {if (index != previous) {if (index.row() != previous.row()) {text += '\n';}else {text += '\t';}}text += index.data(Qt::DisplayRole).toString();previous = index;}QApplication::clipboard()->setText(text);}
}