Qt:Документация 4.3.2/graphicsview-diagramscene-diagramtextitem-h

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[править] diagramtextitem.h Example File
graphicsview/diagramscene/diagramtextitem.h

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 #ifndef DIAGRAMTEXTITEM_H
 #define DIAGRAMTEXTITEM_H
 
 #include <QGraphicsTextItem>
 #include <QPen>
 
 class QFocusEvent;
 class QGraphicsItem;
 class QGraphicsScene;
 class QGraphicsSceneMouseEvent;
 
 class DiagramTextItem : public QGraphicsTextItem
 {
     Q_OBJECT
 
 public:
     enum { Type = UserType + 3 };
 
     DiagramTextItem(QGraphicsItem *parent = 0, QGraphicsScene *scene = 0);
 
     int type() const
         { return Type; }
 
 signals:
     void lostFocus(DiagramTextItem *item);
     void selectedChange(QGraphicsItem *item);
 
 protected:
     QVariant itemChange(GraphicsItemChange change, const QVariant &value);
     void focusOutEvent(QFocusEvent *event);
     void mousePressEvent(QGraphicsSceneMouseEvent *event);
     void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
     void mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event);
 };
 
 #endif

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Qt 4.3.2