给定填充的ro QList的Qt模型视图

Widget::Widget(QWidget *parent)
    : QWidget(parent),
    valuelist(),
    xm(&valuelist) //xm = XModel
{
    xm.append(1);
    xm.append(2);
    xm.append(3);
    xm.append(4);
    xm.append(5);
    xm.append(6);
    xm.append(7);
    xm.append(8);
    xm.append(9);

    view = new QListView(this);
    view->setModel(&xm);

    xm.append(10); // should call beginInsertRows, append to valuelist, and call endInsertRows.

    Q_ASSERT(valuelist.contains(10));

    view->show();
}

否则,您也许可以创建一个QObject和QList的组合,它可以发出信号来通知XModel更改,但我认为第一种方法更好。

编辑:

这是一个愚蠢的例子。它将创建一个列表支持的模型,该模型将每秒向列表添加更多元素:

#include <QtGui/QApplication>
#include <QtGui/QListView>
#include <QtCore/QAbstractListModel>
#include <QtCore/QTimer>

class ListBackedModel : public QAbstractListModel
{
    Q_OBJECT
    QList<int>* m_list;

public:

    ListBackedModel(QList<int>* list, QObject* parent = 0)
        : QAbstractListModel(parent)
        , m_list(list)
    {}

    ~ListBackedModel()
    {}

    int rowCount(const QModelIndex &parent = QModelIndex()) const
    {
        Q_UNUSED(parent);
        return m_list->size();
    }

    QVariant data(const QModelIndex &index, int role) const
    {
        if (index.row() >= rowCount()) { return QVariant(); }
        if (index.row() < 0) { return QVariant(); }

        int element = m_list->at(index.row());

        if (Qt::DisplayRole == role) {
            return QString::number(element);
        }

        if (Qt::ToolTipRole == role) {
            return tr("%1 is element #%2").arg(element).arg(index.row() + 1);
        }

        return QVariant();
    }

    void append(int element)
    {
        /*
            First is the new index of the first element that will be inserted.
            Last is the new index of the last element that will be inserted.
            Since we're appending only one element at the end of the list, the
            index of the first and last elements is the same, and is equal to
            the current size of the list.
        */
        int first = m_list->size();
        int last = first;

        beginInsertRows(QModelIndex(), first, last);
        m_list->append(element);
        endInsertRows();
    }

    void startAddingMoreElements()
    {
        QTimer::singleShot(1000, this, SLOT(addMoreElements()));
    }

private slots:

    void addMoreElements()
    {
        append(qrand() % 100);
        startAddingMoreElements();
    }
};


int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    QList<int> list;
    list << 1 << 10 << 34 << 111;
    ListBackedModel model(&list);

    QListView listView;
    listView.setModel(&model);
    listView.show();

    model.startAddingMoreElements();

    return a.exec();
}

#include "main.moc"