C++ Qt QTableVew选择多行

我发现QTableView Qt版本5.12.10有问题。我创建了一个非常基本的表类，它在类构造函数中只有以下代码：

当我点击最左边的列，而不是id列，它说2，它会选择整个第2行。 当我按住shift键并单击第3行时，它也会选择整个第3行。 当我按住shift键并单击“名字”列中的第4行时，除最左边的列外，它会选择第4行并取消选择第2行

---

根据文档，这可能是预期的行为，但如果在名称列中执行所有单击，则不会取消选择第2行

执行上述操作后，单击第8行，最左边的列将重新选择第1行，而其他任何位置的第8行都不会重新选择第1行

最左边的列似乎有一个表的其余部分无法完全访问的选择值

问题:

我做错什么了吗？ 我是否误解了记录在案的行为？ 有人知道有没有办法让双方以同样的方式工作？ 代码： main.cpp

cqtableview.h

#ifndef CQTABLEVIEW_H
#define CQTABLEVIEW_H

#include <QWidget>
#include <QTableView>
#include "cmodeldata.h"

class CQTableView : public QTableView
{
    Q_OBJECT
public:
    explicit CQTableView(CModelData* pModel = nullptr, QWidget *parent = nullptr)
        : QTableView(parent)
    {
        setModel(pModel);
        setWindowTitle("The Title");
        setSelectionBehavior(QAbstractItemView::SelectRows);
        setSelectionMode(QAbstractItemView::ExtendedSelection);
    }

public slots:
public:
};

#endif // CQTABLEVIEW_H

cmodeldata.h

#ifndef CMODELDATA_H
#define CMODELDATA_H

#include <QAbstractTableModel>
#include <QStringListModel>


class CModelData : public QAbstractTableModel
{
    Q_OBJECT
public:
    enum class EColumns
    {   // The order of the columns
          eId = 0
        , eFirstName
        , eLastName
        , eEmail
        , ePhone
        , eColumnCount
    };
public:
    CModelData(QObject *parent = nullptr);

    /// Get the number of rows in the data source
    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
    /// Get the number of columns in the data source
    int columnCount(const QModelIndex &parent = QModelIndex()) const override;

    /// Return a cell of data
    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;

    /// Return a cell of data relevent to the header
    QVariant headerData(int section, Qt::Orientation orientation, int role) const;
    /// Add a row of data
    bool addRow (const int i, const QString& fn, const QString& ln, const QString& e, const QString& pn);
private:
    struct DataRow
    {   // This is a row of data
        int     id;
        QString firstName;
        QString lastName;
        QString email;
        QString phone;
        DataRow (const int i = 0, const QString& fn = "", const QString& ln = "", const QString& e = "", const QString& pn = "")
            : id(i), firstName(fn), lastName(ln), email(e), phone(pn)
        {}
    };
    QVector<DataRow> m_rows;
};

#endif // CMODELDATA_H

cmodeldata.cpp

#include "cmodeldata.h"

CModelData::CModelData(QObject* pParent)
    : QAbstractTableModel(pParent)
{
    addRow(0, "Alan", "Alanson", "alan@email.com", "0111 111111");
    addRow(1, "Bob", "Brown", "bob@email.com", "0111 222222");
    addRow(2, "Charlie", "Carlson", "charlie@email.com", "0111 333333");
    addRow(3, "Dave", "Davis", "dave@email.com", "0111 444444");
    addRow(4, "Eric", "Ericson", "eric@email.com", "0111 555555");
    addRow(5, "Frank", "Fallows", "frank@email.com", "0111 666666");
    addRow(6, "Geoff", "Geofferson", "geoff@email.com", "0111 777777");
    addRow(7, "Hugo", "Hadron", "hugo@email.com", "0111 888888");
    addRow(8, "Ian", "Indigo", "ian@email.com", "0111 999999");
    addRow(9, "James", "Jamerson", "james@email.com", "0111 000000");
}

int CModelData::rowCount(const QModelIndex & /*parent*/) const
{
   return m_rows.count();
}

int CModelData::columnCount(const QModelIndex & /*parent*/) const
{
    return static_cast<int>(EColumns::eColumnCount);
}

QVariant CModelData::data(const QModelIndex &index, int role) const
{
    if (role == Qt::DisplayRole)
    {
        /// return QString("Row%1, Column%2").arg(index.row() + 1).arg(index.column() +1);
        for (auto& item : m_rows)
        {
            if (item.id == index.row())
            {
                switch (index.column())
                {
                case static_cast<int>(EColumns::eId):
                    return item.id;
                case static_cast<int>(EColumns::eFirstName):
                    return item.firstName;
                case static_cast<int>(EColumns::eLastName):
                    return item.lastName;
                case static_cast<int>(EColumns::eEmail):
                    return item.email;
                case static_cast<int>(EColumns::ePhone):
                    return item.phone;
                default:
                    return QVariant();
                }
            }
        }
    }
    return QVariant();
}

QVariant CModelData::headerData(int section, Qt::Orientation orientation, int role) const
{
    if (role == Qt::DisplayRole && orientation == Qt::Horizontal)
    {
        switch (section)
        {
        case static_cast<int>(EColumns::eId):
            return QString("Id");
        case static_cast<int>(EColumns::eFirstName):
            return QString("First Name");
        case static_cast<int>(EColumns::eLastName):
            return QString("Last Name");
        case static_cast<int>(EColumns::eEmail):
            return QString("Email");
        case static_cast<int>(EColumns::ePhone):
            return QString("Phone");
        }
    }
    // return QAbstractTableModel::headerData(section, orientation, role);
    return QAbstractTableModel::headerData(section, orientation, role);
}

bool CModelData::addRow (const int i, const QString& fn, const QString& ln, const QString& e, const QString& pn)
{
    m_rows.append(DataRow(i, fn, ln, e, pn));
    return true;
}

---

这是Qt中的一个bug，我在这里创建了一个bug报告：

根据文档，当按住Shift键时，会选择连续的行。但是，通过按住CTRL键，您应该能够选择任意行。同意，因此在本例中，我应该选择第2到第4行。如果单击第2列而不是最左边的列，则会发生这种情况。我不确定我是否做错了什么，或者左列处理shift单击的方式是否存在错误。您是否尝试过单击2，然后shift单击“4”？那有什么用？它是否选择了所有三行？当然，Qt只是一个非常大和复杂的框架，当然也不能排除bug。您的模型在第一列返回什么标志？@RefugnicEternium单击2，然后按住shift键单击4左列，选择第2到第4行。但是，单击下面或上面任何一行的第3列都会导致问题。有一种方法可以阻止这种情况发生，方法是按住shift键并在其他列上单击4次，但这并不是我们可以要求用户真正做的事情。我更喜欢你的简单示例：

#ifndef CMODELDATA_H
#define CMODELDATA_H

#include <QAbstractTableModel>
#include <QStringListModel>


class CModelData : public QAbstractTableModel
{
    Q_OBJECT
public:
    enum class EColumns
    {   // The order of the columns
          eId = 0
        , eFirstName
        , eLastName
        , eEmail
        , ePhone
        , eColumnCount
    };
public:
    CModelData(QObject *parent = nullptr);

    /// Get the number of rows in the data source
    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
    /// Get the number of columns in the data source
    int columnCount(const QModelIndex &parent = QModelIndex()) const override;

    /// Return a cell of data
    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;

    /// Return a cell of data relevent to the header
    QVariant headerData(int section, Qt::Orientation orientation, int role) const;
    /// Add a row of data
    bool addRow (const int i, const QString& fn, const QString& ln, const QString& e, const QString& pn);
private:
    struct DataRow
    {   // This is a row of data
        int     id;
        QString firstName;
        QString lastName;
        QString email;
        QString phone;
        DataRow (const int i = 0, const QString& fn = "", const QString& ln = "", const QString& e = "", const QString& pn = "")
            : id(i), firstName(fn), lastName(ln), email(e), phone(pn)
        {}
    };
    QVector<DataRow> m_rows;
};

#endif // CMODELDATA_H

#include "cmodeldata.h"

CModelData::CModelData(QObject* pParent)
    : QAbstractTableModel(pParent)
{
    addRow(0, "Alan", "Alanson", "alan@email.com", "0111 111111");
    addRow(1, "Bob", "Brown", "bob@email.com", "0111 222222");
    addRow(2, "Charlie", "Carlson", "charlie@email.com", "0111 333333");
    addRow(3, "Dave", "Davis", "dave@email.com", "0111 444444");
    addRow(4, "Eric", "Ericson", "eric@email.com", "0111 555555");
    addRow(5, "Frank", "Fallows", "frank@email.com", "0111 666666");
    addRow(6, "Geoff", "Geofferson", "geoff@email.com", "0111 777777");
    addRow(7, "Hugo", "Hadron", "hugo@email.com", "0111 888888");
    addRow(8, "Ian", "Indigo", "ian@email.com", "0111 999999");
    addRow(9, "James", "Jamerson", "james@email.com", "0111 000000");
}

int CModelData::rowCount(const QModelIndex & /*parent*/) const
{
   return m_rows.count();
}

int CModelData::columnCount(const QModelIndex & /*parent*/) const
{
    return static_cast<int>(EColumns::eColumnCount);
}

QVariant CModelData::data(const QModelIndex &index, int role) const
{
    if (role == Qt::DisplayRole)
    {
        /// return QString("Row%1, Column%2").arg(index.row() + 1).arg(index.column() +1);
        for (auto& item : m_rows)
        {
            if (item.id == index.row())
            {
                switch (index.column())
                {
                case static_cast<int>(EColumns::eId):
                    return item.id;
                case static_cast<int>(EColumns::eFirstName):
                    return item.firstName;
                case static_cast<int>(EColumns::eLastName):
                    return item.lastName;
                case static_cast<int>(EColumns::eEmail):
                    return item.email;
                case static_cast<int>(EColumns::ePhone):
                    return item.phone;
                default:
                    return QVariant();
                }
            }
        }
    }
    return QVariant();
}

QVariant CModelData::headerData(int section, Qt::Orientation orientation, int role) const
{
    if (role == Qt::DisplayRole && orientation == Qt::Horizontal)
    {
        switch (section)
        {
        case static_cast<int>(EColumns::eId):
            return QString("Id");
        case static_cast<int>(EColumns::eFirstName):
            return QString("First Name");
        case static_cast<int>(EColumns::eLastName):
            return QString("Last Name");
        case static_cast<int>(EColumns::eEmail):
            return QString("Email");
        case static_cast<int>(EColumns::ePhone):
            return QString("Phone");
        }
    }
    // return QAbstractTableModel::headerData(section, orientation, role);
    return QAbstractTableModel::headerData(section, orientation, role);
}

bool CModelData::addRow (const int i, const QString& fn, const QString& ln, const QString& e, const QString& pn)
{
    m_rows.append(DataRow(i, fn, ln, e, pn));
    return true;
}