QGraphicsItem

#ifndef MOVEITEM_H
#define MOVEITEM_H
 
#include <QObject>
#include <QGraphicsItem>
#include <QPainter>
#include <QGraphicsSceneMouseEvent>
#include <QDebug>
#include <QCursor>
 
class MoveItem : public QObject, public QGraphicsItem
{
    Q_OBJECT
public:
    explicit MoveItem(QObject *parent = 0);
    ~MoveItem();
 
public:
    void setText(const &QString text); 
private:
    QRectF boundingRect() const;
    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
    void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
    void mousePressEvent(QGraphicsSceneMouseEvent *event);
    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
 
    QString m_someText;
};
 
#endif // MOVEITEM_H

void setSomeText(const &QString text)
{
    m_someText = text;
    update();
}

painter->drawText(-30,-30, m_someText)