#include <QtGui/QApplication>
#include <QMainWindow>
#include <QAbstractListModel>
#include <QList>
#include <QPushButton>
#include <QListView>
#include <QVBoxLayout>

class TestModel : public QAbstractListModel
{
    Q_OBJECT
public:
    TestModel(QObject* parent = NULL)
        : QAbstractListModel(parent)
    {
        Data << 1 << 2 << 3;
    }

    virtual ~TestModel()
    { }

    int rowCount (const QModelIndex & parent = QModelIndex() ) const
    {
        return Data.count();
    }

    QVariant data ( const QModelIndex & index, int role = Qt::DisplayRole ) const {
        if(role == Qt::DisplayRole && index.row() >= 0 && index.row() < rowCount())
            return QString::number(Data.at(index.row()));
        else
            return QVariant();
    }

public slots:
    void moveUp() {
        QModelIndex tmpIndex = index(0);
        beginMoveRows(tmpIndex.parent(), 0, 0, tmpIndex.parent(), 1);
        Data.move(0,1);
        endMoveRows();
    }

protected:
    QList<int> Data;
};

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = 0)
        : QMainWindow(parent), Model(new TestModel(this))
    {
        QWidget* centralWidget = new QWidget(this);
        centralWidget->setObjectName(QString::fromUtf8("centralWidget"));
        QVBoxLayout* verticalLayout = new QVBoxLayout(centralWidget);
        verticalLayout->setSpacing(6);
        verticalLayout->setContentsMargins(11, 11, 11, 11);
        verticalLayout->setObjectName(QString::fromUtf8("verticalLayout"));
        QListView* listView = new QListView(centralWidget);
        listView->setObjectName(QString::fromUtf8("listView"));
        verticalLayout->addWidget(listView);
        QPushButton* Button = new QPushButton("Click", centralWidget);
        verticalLayout->addWidget(Button);
        setCentralWidget(centralWidget);

        connect(Button, SIGNAL(clicked()), Model, SLOT(moveUp()));
        listView->setModel(Model);
    }

    virtual ~MainWindow()
    { }

protected:
    TestModel* Model;
};


int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();
    return a.exec();
}