使用QT5如何打印QTablewidget和缩放表格以适应A4工作表的一侧

QPrinter printer;
printer.setPageSize(QPrinter::A4);
printer.setOrientation(QPrinter::Landscape);

QPrintDialog dialog(&printer);
if (dialog.exec() == QDialog::Accepted) {
    // 用户点击了打印按钮
    // 在这里执行打印操作
}

QPainter painter(&printer);
painter.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing);
QTableWidget* tableWidget = new QTableWidget(); // 获取QTableWidget对象的指针
tableWidget->render(&painter);

QHeaderView* horizontalHeader = tableWidget->horizontalHeader();
QHeaderView* verticalHeader = tableWidget->verticalHeader();
int totalWidth = horizontalHeader->length();
int totalHeight = verticalHeader->length();
double scaleFactor = 1.0;

if (totalWidth > printer.width() || totalHeight > printer.height()) {
    double widthScaleFactor = printer.width() / totalWidth;
    double heightScaleFactor = printer.height() / totalHeight;
    scaleFactor = qMin(widthScaleFactor, heightScaleFactor);
}

tableWidget->setFixedSize(totalWidth * scaleFactor, totalHeight * scaleFactor);

painter.scale(scaleFactor, scaleFactor);
painter.translate(0, 0);
painter.drawTable(tableWidget->geometry(), tableWidget->model());