QAbstractItemView problem

[Kostanev]

How I can property inherit that class? I done something like that:

class OptionalModel : public QAbstractItemView
{
    Q_OBJECT
 
public:
	OptionalModel(QWidget *parent = 0);
	~OptionalModel();
 
	QRect visualRect(const QModelIndex &index);
	void scrollTo(const QModelIndex &index, ScrollHint hint = EnsureVisible);
	QModelIndex indexAt(const QPoint &point);
	QModelIndex moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers);
	int horizontalOffset();
	int verticalOffset();
	bool isIndexHidden(const QModelIndex &index);
	void setSelection(const QRect &rect, QItemSelectionModel::SelectionFlags command);
	QRegion visualRegionForSelection(const QItemSelection &selection);
 
private slots:
	void selectAll();
};

class OptionalModel : public QAbstractItemView
{
    Q_OBJECT

public:
	OptionalModel(QWidget *parent = 0);
	~OptionalModel();

	QRect visualRect(const QModelIndex &index);
	void scrollTo(const QModelIndex &index, ScrollHint hint = EnsureVisible);
	QModelIndex indexAt(const QPoint &point);
	QModelIndex moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers);
	int horizontalOffset();
	int verticalOffset();
	bool isIndexHidden(const QModelIndex &index);
	void setSelection(const QRect &rect, QItemSelectionModel::SelectionFlags command);
	QRegion visualRegionForSelection(const QItemSelection &selection);

private slots:
	void selectAll();
};

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Of cource its initalised in one .cpp file but I still get this error when compiling:
error C2259: 'OptionalModel' : cannot instantiate abstract class

What I must do to fix that ?