qt5的mvc实现，model总共8列数据，代理其中第7列为icon+文本，请思考一下，给出c++代码示例

好的，以下是一个简单的 Qt5 MVC 实现，其中包括一个模型（Model）、一个代理（Delegate）和一个视图（View）。模型中包含8列数据，第7列为图标和文本，代理用于呈现第7列数据。

Model.h:

#ifndef MODEL_H
#define MODEL_H

#include <QAbstractTableModel>
#include <QList>

class Model : public QAbstractTableModel
{
public:
    Model(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;
    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 // MODEL_H

Model.cpp:

#include "Model.h"

#include <QIcon>

Model::Model(QObject *parent)
    : QAbstractTableModel(parent)
{
    // 初始化模型数据
    QList<QVariant> row;
    row << 1 << "Item 1" << "Description 1" << "Value 1" << "Note 1" << "Tag 1" << QIcon(":/icons/icon1.png") << "Status 1";
    m_data << row;
    row.clear();
    row << 2 << "Item 2" << "Description 2" << "Value 2" << "Note 2" << "Tag 2" << QIcon(":/icons/icon2.png") << "Status 2";
    m_data << row;
}

int Model::rowCount(const QModelIndex &parent) const
{
    if (parent.isValid())
        return 0;
    return m_data.size();
}

int Model::columnCount(const QModelIndex &parent) const
{
    if (parent.isValid())
        return 0;
    return 8;
}

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

    if (role == Qt::DisplayRole || role == Qt::EditRole)
        return m_data[index.row()][index.column()];
    else if (role == Qt::DecorationRole && index.column() == 6)
        return m_data[index.row()][index.column()].value<QIcon>();
    else
        return QVariant();
}

QVariant Model::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("Item");
        case 2:
            return QString("Description");
        case 3:
            return QString("Value");
        case 4:
            return QString("Note");
        case 5:
            return QString("Tag");
        case 6:
            return QString("Icon");
        case 7:
            return QString("Status");
        default:
            return QVariant();
        }
    }

    return QVariant();
}

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

    return QAbstractTableModel::flags(index);
}

Delegate.h:

#ifndef DELEGATE_H
#define DELEGATE_H

#include <QStyledItemDelegate>

class Delegate : public QStyledItemDelegate
{
public:
    Delegate(QObject *parent = nullptr);

    QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const override;
    void setEditorData(QWidget *editor, const QModelIndex &index) const override;
    void setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const override;
    void updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index) const override;
    void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const override;
};

#endif // DELEGATE_H

Delegate.cpp:

#include "Delegate.h"

#include <QComboBox>
#include <QLineEdit>
#include <QPainter>

Delegate::Delegate(QObject *parent)
    : QStyledItemDelegate(parent)
{
}

QWidget *Delegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    if (index.column() == 6) {
        QComboBox *editor = new QComboBox(parent);
        editor->addItem(QIcon(":/icons/icon1.png"), "Icon 1");
        editor->addItem(QIcon(":/icons/icon2.png"), "Icon 2");
        editor->addItem(QIcon(":/icons/icon3.png"), "Icon 3");
        return editor;
    } else {
        return QStyledItemDelegate::createEditor(parent, option, index);
    }
}

void Delegate::setEditorData(QWidget *editor, const QModelIndex &index) const
{
    if (index.column() == 6) {
        QComboBox *comboBox = qobject_cast<QComboBox *>(editor);
        comboBox->setCurrentIndex(comboBox->findText(index.data().toString()));
    } else {
        QStyledItemDelegate::setEditorData(editor, index);
    }
}

void Delegate::setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const
{
    if (index.column() == 6) {
        QComboBox *comboBox = qobject_cast<QComboBox *>(editor);
        model->setData(index, comboBox->currentText());
    } else {
        QStyledItemDelegate::setModelData(editor, model, index);
    }
}

void Delegate::updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    if (index.column() == 6) {
        editor->setGeometry(option.rect);
    } else {
        QStyledItemDelegate::updateEditorGeometry(editor, option, index);
    }
}

void Delegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    if (index.column() == 6) {
        QIcon icon = index.data(Qt::DecorationRole).value<QIcon>();
        QString text = index.data(Qt::DisplayRole).toString();
        QRect rect = option.rect;
        QRect iconRect(rect.left() + 2, rect.top() + 2, 16, 16);
        QRect textRect(rect.left() + 20, rect.top(), rect.width() - 20, rect.height());
        icon.paint(painter, iconRect, Qt::AlignLeft | Qt::AlignVCenter);
        painter->drawText(textRect, Qt::AlignLeft | Qt::AlignVCenter, text);
    } else {
        QStyledItemDelegate::paint(painter, option, index);
    }
}

View.h:

#ifndef VIEW_H
#define VIEW_H

#include <QTableView>

class View : public QTableView
{
public:
    View(QWidget *parent = nullptr);

private:
    void setupModel();
    void setupDelegate();
};

#endif // VIEW_H

View.cpp:

#include "View.h"
#include "Model.h"
#include "Delegate.h"

View::View(QWidget *parent)
    : QTableView(parent)
{
    setSelectionMode(QAbstractItemView::SingleSelection);
    setSelectionBehavior(QAbstractItemView::SelectRows);
    setEditTriggers(QAbstractItemView::DoubleClicked | QAbstractItemView::SelectedClicked);
    setAlternatingRowColors(true);

    setupModel();
    setupDelegate();
}

void View::setupModel()
{
    Model *model = new Model(this);
    setModel(model);
}

void View::setupDelegate()
{
    Delegate *delegate = new Delegate(this);
    setItemDelegate(delegate);
}

在这个示例中，我们为第7列数据创建了一个自定义代理。代理中创建了一个`QComboBox`，其中包含三个图标和文本，用于选择图标。在`paint()`方法中，代理将图标和文本呈现在单元格中。在`createEditor()`、`setEditorData()`和`setModelData()`方法中，代理将`QComboBox`与模型中的数据进行交互。

请注意，此示例中使用的图标应该存储在项目资源中，可以使用Qt的资源系统进行管理。