Subclassing QGraphicsPixmapItem ???

[mdavidjohnson]

I'm trying to establish an array of QGraphicsPixmapItems.

// Pre-Try as a general check:
 
QPixmap pixmapA = QPixmap( ":/images/imageA.png" );
QGraphicsPixmapItem pixmapItemA;
pixmapItemA.setPixmap( pixmapA );
 
// This works

// Pre-Try as a general check:

QPixmap pixmapA = QPixmap( ":/images/imageA.png" );
QGraphicsPixmapItem pixmapItemA;
pixmapItemA.setPixmap( pixmapA );

// This works

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But then:

// First Try
 
QVector< QGraphicsPixmapItem > itemVector( 100 );
itemVector[23].setPixmap( pixmapA );
 
// Fails: In QGraphicsPixmapItem, 'DISABLE COPY' is private

// First Try

QVector< QGraphicsPixmapItem > itemVector( 100 );
itemVector[23].setPixmap( pixmapA );

// Fails: In QGraphicsPixmapItem, 'DISABLE COPY' is private

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And:

// Second Try:
 
QVector< QGraphicsPixmapItem > itemVector( 100 );
QGraphicsPixmapItem pixmapItemA;
pixmapItemA.setPixmap( pixmapA );
itemVector[23] = pixmapItemA;
 
// Fails: In QGraphicsPixmapItem, 'operator=' is private

// Second Try:

QVector< QGraphicsPixmapItem > itemVector( 100 );
QGraphicsPixmapItem pixmapItemA;
pixmapItemA.setPixmap( pixmapA );
itemVector[23] = pixmapItemA;

// Fails: In QGraphicsPixmapItem, 'operator=' is private

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And, finally:

// Third Try:
 
QVector< QGraphicsItem > itemVector( 100 );
QGraphicsPixmapItem pixmapItemA;
pixmapItemA.setPixmap( pixmapA );
itemVector[23] = pixmapItemA;
 
// Fails - invalid abstract return type 'QGraphicsItem'

// Third Try:

QVector< QGraphicsItem > itemVector( 100 );
QGraphicsPixmapItem pixmapItemA;
pixmapItemA.setPixmap( pixmapA );
itemVector[23] = pixmapItemA;

// Fails - invalid abstract return type 'QGraphicsItem'

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Is there something I'm missing?

Or, am I going to have to subclass QGraphicsPixmapItem in order to get this to work?

If the latter, could somebody please point me to a reasonably straightforward link on subclassing? I've never tried anything like that and have numerous trepidations.

BTW, I do note in qglobal.h :

/*
   Some classes do not permit copies to be made of an object. These
   classes contains a private copy constructor and assignment
   operator to disable copying (the compiler gives an error message).
*/
#define Q_DISABLE_COPY(Class) \
    Class(const Class &) Q_DECL_EQ_DELETE;\
    Class &operator=(const Class &) Q_DECL_EQ_DELETE;

/*
   Some classes do not permit copies to be made of an object. These
   classes contains a private copy constructor and assignment
   operator to disable copying (the compiler gives an error message).
*/
#define Q_DISABLE_COPY(Class) \
    Class(const Class &) Q_DECL_EQ_DELETE;\
    Class &operator=(const Class &) Q_DECL_EQ_DELETE;

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Why would copies not be permitted? If there's a valid reason, subclassing to get past it might break something, in which case Qt would seem not to be what I need to use ???