用c语言在QT上实现qtablewidget右击表头进行筛选

可以通过以下步骤在QT上实现qtablewidget右击表头进行筛选：

1.为QTableWidget设置右键菜单：

QMenu *menu = new QMenu(ui->tableWidget);
ui->tableWidget->setContextMenuPolicy(Qt::CustomContextMenu);
ui->tableWidget->horizontalHeader()->setContextMenuPolicy(Qt::CustomContextMenu);
connect(ui->tableWidget, SIGNAL(customContextMenuRequested(QPoint)), this, SLOT(showMenu(QPoint)));

2.在showMenu()函数中创建菜单项，并连接槽函数：

void MainWindow::showMenu(QPoint pos)
{
    QPoint globalPos = ui->tableWidget->mapToGlobal(pos);
    QMenu *menu = new QMenu(this);
    QAction *filterAction = new QAction(tr("Filter"), this);
    connect(filterAction, SIGNAL(triggered()), this, SLOT(showFilterDialog()));
    menu->addAction(filterAction);
    menu->popup(globalPos);
}

3.在showFilterDialog()函数中创建筛选对话框，并执行筛选操作：

void MainWindow::showFilterDialog()
{
    QDialog *dialog = new QDialog(this);
    QVBoxLayout *layout = new QVBoxLayout(dialog);
    QComboBox *columnCombo = new QComboBox(dialog);
    QLineEdit *filterEdit = new QLineEdit(dialog);
    QPushButton *okButton = new QPushButton(tr("OK"), dialog);
    layout->addWidget(columnCombo);
    layout->addWidget(filterEdit);
    layout->addWidget(okButton);
    dialog->setLayout(layout);
    dialog->setWindowTitle(tr("Filter"));
    dialog->setModal(true);
    connect(okButton, SIGNAL(clicked()), dialog, SLOT(accept()));
    if(dialog->exec() == QDialog::Accepted)
    {
        QString filterString = filterEdit->text();
        int column = columnCombo->currentIndex();
        QTableWidget *tableWidget = ui->tableWidget;
        for(int i = 0; i < tableWidget->rowCount(); i++)
        {
            QTableWidgetItem *item = tableWidget->item(i, column);
            if(item)
            {
                if(item->text().contains(filterString, Qt::CaseInsensitive))
                {
                    tableWidget->showRow(i);
                }
                else
                {
                    tableWidget->hideRow(i);
                }
            }
        }
    }
}

以上就是在QT上实现qtablewidget右击表头进行筛选的方法，希望对你有所帮助。