Qt中QTableView中加入Check列实现

通过Delegate创建QCheckBox来实现的Check列，只有在该列进入编辑模式时才能够Check/Uncheck。这显然不是我们想要的，网上翻来翻去，在一个国外论坛中看到了无需Delegate的实现方法，只需重写Model即可：

 

class MyModel : public QSqlQueryModel {

    Q_OBJECT

public:

    MyModel(QObject *parent = 0);

    Qt::ItemFlags flags(const QModelIndex &index) const;

    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;

........

};

Qt::ItemFlags MyModel::flags(const QModelIndex &index) const {

    Qt::ItemFlags flags = QSqlQueryModel::flags(index);

    if (index.column() == aColWithCheckbox)

        flags |= Qt::ItemIsUserCheckable;

    else

        flags |= Qt::ItemIsEditable;

    return flags;

} 

QVariant MyModel::data(const QModelIndex &index,  int role) const {

  QVariant value = QSqlQueryModel::data(index, role);

  if (role == Qt::CheckStateRole && index.column() == aColWithCheckbox)

    return (QSqlQueryModel::data(index).toInt() != 0) ? Qt::Checked : Qt::Unchecked;

  else

    return value;

}

bool MyModel::setData( const QModelIndex & index, const QVariant & value, int role)
{
    if(index.isValid() && role == Qt::CheckStateRole&&index.column()==0)
    {
        if(value.value<int>()==Qt::Checked)
        {
            m_config->setAutoRun(index.row(), true);
        }
        else
        {
            m_config->setAutoRun(index.row(), false);
        }
        emit dataChanged(index, index);
        return true;
    }
    return false;
}