Qt Qtableview 自定义model继承QAbstractTableModel头文件和cpp

下面是一个简单的自定义QAbstractTableModel的头文件和cpp文件：

MyTableModel.h:

#ifndef MYTABLEMODEL_H
#define MYTABLEMODEL_H

#include <QAbstractTableModel>
#include <QList>

class MyTableModel : public QAbstractTableModel
{
public:
    MyTableModel(QObject *parent = nullptr);

    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
    int columnCount(const QModelIndex &parent = QModelIndex()) const override;
    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
    bool setData(const QModelIndex &index, const QVariant &value, int role = Qt::EditRole) override;
    QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const override;
    Qt::ItemFlags flags(const QModelIndex &index) const override;

private:
    QList<QList<QVariant>> m_data;
};

#endif // MYTABLEMODEL_H

MyTableModel.cpp:

#include "MyTableModel.h"

MyTableModel::MyTableModel(QObject *parent)
    : QAbstractTableModel(parent)
{
    // 初始化数据
    QList<QVariant> row1;
    row1 << 1 << "John" << "Doe";
    QList<QVariant> row2;
    row2 << 2 << "Jane" << "Doe";
    QList<QVariant> row3;
    row3 << 3 << "Bob" << "Smith";
    m_data.append(row1);
    m_data.append(row2);
    m_data.append(row3);
}

int MyTableModel::rowCount(const QModelIndex &parent) const
{
    Q_UNUSED(parent)
    return m_data.count();
}

int MyTableModel::columnCount(const QModelIndex &parent) const
{
    Q_UNUSED(parent)
    return m_data.first().count();
}

QVariant MyTableModel::data(const QModelIndex &index, int role) const
{
    if (!index.isValid())
        return QVariant();

    if (index.row() >= m_data.count() || index.row() < 0)
        return QVariant();

    if (index.column() >= m_data[index.row()].count() || index.column() < 0)
        return QVariant();

    if (role == Qt::DisplayRole || role == Qt::EditRole)
        return m_data[index.row()][index.column()];

    return QVariant();
}

bool MyTableModel::setData(const QModelIndex &index, const QVariant &value, int role)
{
    if (index.isValid() && role == Qt::EditRole) {
        m_data[index.row()][index.column()] = value;
        emit dataChanged(index, index, QVector<int>() << role);
        return true;
    }
    return false;
}

QVariant MyTableModel::headerData(int section, Qt::Orientation orientation, int role) const
{
    if (role != Qt::DisplayRole)
        return QVariant();

    if (orientation == Qt::Horizontal) {
        switch (section) {
        case 0:
            return QString("ID");
        case 1:
            return QString("First Name");
        case 2:
            return QString("Last Name");
        default:
            return QVariant();
        }
    }
    return QVariant();
}

Qt::ItemFlags MyTableModel::flags(const QModelIndex &index) const
{
    if (!index.isValid())
        return Qt::NoItemFlags;

    return Qt::ItemIsEditable | QAbstractTableModel::flags(index);
}

在这个例子中，MyTableModel类实现了一个简单的表格数据模型。在构造函数中，初始化了表格数据。在data()方法中，根据index返回对应的数据。在setData()方法中，根据index和value设置对应的数据。在headerData()方法中，返回表头的标签。在flags()方法中，指定表格项可编辑。