qt5的mvc模型视图代理实现，9列数据，第7列包含ico图片，其中视图只展示当前20行数据,且3，8，9列初始化数据为空，收到数据后3，8，9列才有值，当收到当前页的某行数据时，当前行变颜色。请思考一下，给出代码用例。

这里是一个简单的示例代码，实现了Qt5中的MVC模型视图代理，并展示了包含ico图片的第7列，同时初始化了第3、8、9列的数据为空。当收到当前页的某行数据时，该行变为蓝色。

// Model
class MyModel : public QAbstractTableModel {
public:
    MyModel(QObject *parent = nullptr) : QAbstractTableModel(parent) {}
    int rowCount(const QModelIndex &parent = QModelIndex()) const override { return m_data.size(); }
    int columnCount(const QModelIndex &parent = QModelIndex()) const override { return 9; }
    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override {
        if (!index.isValid() || role != Qt::DisplayRole && role != Qt::DecorationRole) return QVariant();
        const auto &rowData = m_data[index.row()];
        if (index.column() == 6) {
            if (role == Qt::DecorationRole) return rowData.icon;
        } else {
            return rowData.values[index.column()];
        }
        return QVariant();
    }
    QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const override {
        if (orientation != Qt::Horizontal || role != Qt::DisplayRole) return QVariant();
        switch (section) {
        case 0: return "#";
        case 1: return "Name";
        case 2: return "Age";
        case 3: return "Address";
        case 4: return "Phone";
        case 5: return "Email";
        case 6: return "Icon";
        case 7: return "Note1";
        case 8: return "Note2";
        default: return QVariant();
        }
    }
    void setPageData(const QVector<RowData> &newData) { m_data = newData; }
    void setRowColor(const QModelIndex &index, const QColor &color) {
        Q_EMIT dataChanged(index, index, {Qt::BackgroundRole});
        m_rowColors[index.row()] = color;
    }
    QColor getRowColor(int row) const {
        if (m_rowColors.contains(row)) return m_rowColors[row];
        return QColor();
    }
private:
    QVector<RowData> m_data;
    QMap<int, QColor> m_rowColors;
};

// Delegate
class MyDelegate : public QStyledItemDelegate {
public:
    void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const override {
        if (index.column() == 6) {
            const auto &icon = index.data(Qt::DecorationRole).value<QIcon>();
            if (!icon.isNull()) {
                const auto rect = option.rect;
                const auto iconSize = icon.actualSize(rect.size());
                const auto x = rect.center().x() - iconSize.width() / 2;
                const auto y = rect.center().y() - iconSize.height() / 2;
                painter->drawPixmap(x, y, icon.pixmap(iconSize));
                return;
            }
        }
        QStyledItemDelegate::paint(painter, option, index);
    }
    QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const override {
        if (index.column() == 6) {
            const auto &icon = index.data(Qt::DecorationRole).value<QIcon>();
            if (!icon.isNull()) {
                return icon.actualSize(option.rect.size());
            }
        }
        return QStyledItemDelegate::sizeHint(option, index);
    }
};

// View
class MyTableView : public QTableView {
public:
    MyTableView(QWidget *parent = nullptr) : QTableView(parent) {
        const auto model = new MyModel(this);
        setModel(model);
        const auto delegate = new MyDelegate(this);
        setItemDelegate(delegate);
        setShowGrid(false);
        setAlternatingRowColors(true);
        setEditTriggers(QAbstractItemView::NoEditTriggers);

        // 初始化数据
        QVector<RowData> data;
        for (int i = 0; i < 100; ++i) {
            auto rowData = RowData{i + 1, QString("name%1").arg(i+1), i+20, "address", "phone", "email"};
            if (i % 2 == 0) rowData.icon = QIcon(":/icons/person.png");
            data.append(rowData);
        }
        model->setPageData(data);
        resizeColumnsToContents();
        setColumnWidth(6, 50);

        // 当收到数据时，设置第3、8、9列的值，并且设置当前行颜色为蓝色
        connect(this, &MyTableView::clicked, [=](const QModelIndex &index) {
            if (!index.isValid()) return;
            auto model = qobject_cast<MyModel *>(this->model());
            auto data = model->getPageData();
            if (index.row() >= data.size()) return;
            data[index.row()].values[2] = 30;
            data[index.row()].values[7] = "note1";
            data[index.row()].values[8] = "note2";
            model->setPageData(data);
            model->setRowColor(index, Qt::blue);
        });
    }
};

// Usage
int main(int argc, char *argv[]) {
    QApplication app(argc, argv);
    MyTableView view;
    view.show();
    return app.exec();
}

注意：这里的代码只是一个示例，实际使用时需要根据自己的需求进行修改。