void frmDbDelegate::initTableView()
{
m_pActionCopy = new QAction(tr("复制"), ui->tableView);
    connect(m_pActionCopy, &QAction::triggered, this, &frmDbDelegate::copyData2);
    ui->tableView->setSelectionMode(QAbstractItemView::ContiguousSelection); //设置为连续选择模式
    ui->tableView->setContextMenuPolicy(Qt::ActionsContextMenu);             //设置为action菜单模式
    ui->tableView->addAction(this->m_pActionCopy);
}
//粘贴板表格内容格式：
//列与列之间内容以制表符分隔（"\t"）
//行与行之间内容以换行符分隔（"\n"）
//粘贴：
//获取粘贴板内容，把内容分解成单个item的值并放到表格中
//通过QApplication::clipboard()->text()类获取粘贴板的内容
//复制：
//获取选中item，把选中item内容组织一下并放到粘贴板
//通过QApplication::clipboard()->setText()设置粘贴板内容
void frmDbDelegate::copyData1()
{
    QModelIndexList indexes = ui->tableView->selectionModel()->selectedIndexes();
    if (indexes.count() == 0)
    {
        //select nothing
        return;
    }
    QMap<QString, QString> map;
    QModelIndex index;
    int k = 0;
    int maxCol = 0;
    int maxRow = 0;
    int minCol = 0;
    int minRow = 0;
    foreach (index, indexes)
    {
        int col = index.column();
        int row = index.row();
        if (k == 0)
        {
            minCol = col;
            minRow = row;
        }
        if (col > maxCol)
            maxCol = col;
        if (row > maxRow)
            maxRow = row;
        QString text = index.model()->data(index, Qt::EditRole).toString();
        map[QString::number(row) + "," + QString::number(col)] = text;
        k++;
    }
    QString rs = "";
    for (int row = minRow; row <= maxRow; row++)
    {
        for (int col = minCol; col <= maxCol; col++)
        {
            if (col != minCol)
                rs += "\t";
            rs += map[QString::number(row) + "," + QString::number(col)];
        }
    }
    rs += "\r\n";
    //复制到剪贴板
    QClipboard *board = QApplication::clipboard();
    board->setText(rs);
    qDebug() << rs;
}
void frmDbDelegate::copyData2()
{
    QStringList list;
    QModelIndexList indexes = ui->tableView->selectionModel()->selectedIndexes();
    if (indexes.count() == 0)
    {
        //select nothing
        return;
    }
    foreach (const QModelIndex &index, indexes)
    {
        list << index.data().toString();
    }
    QApplication::clipboard()->setText(list.join(","));
}