/****************************************************************************

** 

**

** Implementation of base class for all collection classes

**

** Created : 920820

**

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#include "qcollection.h"

// NOT REVISED

/*!

  \class QCollection qcollection.h

  \brief The QCollection class is the base class of all Qt collections.

  \ingroup collection

  \ingroup tools

  The QCollection class is an abstract base class for the Qt \link

  collection.html collection classes\endlink QDict, QList etc. via QGDict,

  QGList etc.

  A QCollection knows only about the number of objects in the

  collection and the deletion strategy (see setAutoDelete()).

  A collection is implemented using the \c Item (generic collection

  item) type, which is a \c void*.  The template classes that create

  the real collections cast the \c Item to the required type.

  \sa \link collection.html Collection Classes\endlink

*/

/*! \enum QCollection::Item

  This type is the generic "item" in a QCollection.

*/

/*!

  \fn QCollection::QCollection()

  Constructs a collection. The constructor is protected because

  QCollection is an abstract class.

*/

/*!

  \fn QCollection::QCollection( const QCollection & source )

  Constructs a copy of \a source with autoDelete() set to FALSE. The

  constructor is protected because QCollection is an abstract class.

  Note that if \a source has autoDelete turned on, copying it is a

  good way to get memory leaks, reading freed memory, or both.

*/

/*!

  \fn QCollection::~QCollection()

  Destroys the collection. The destructor is protected because QCollection

  is an abstract class.

*/

/*!

  \fn bool QCollection::autoDelete() const

  Returns the setting of the auto-delete option (default is FALSE).

  \sa setAutoDelete()

*/

/*!

  \fn void QCollection::setAutoDelete( bool enable )

  Sets the auto-delete option of the collection.

  Enabling auto-delete (\e enable is TRUE) will delete objects that

  are removed from the collection.  This can be useful if the

  collection has the only reference to the objects.  (Note that the

  object can still be copied using the copy constructor - copying such

  objects is a good way to get memory leaks, reading freed memory or

  both.)

  Disabling auto-delete (\e enable is FALSE) will \e not delete objects

  that are removed from the collection.	 This is useful if the objects

  are part of many collections.

  The default setting is FALSE.

  \sa autoDelete()

*/

/*!

  \fn virtual uint QCollection::count() const

  Returns the number of objects in the collection.

*/

/*!

  \fn virtual void QCollection::clear()

  Removes all objects from the collection.  The objects will be deleted

  if auto-delete has been enabled.

  \sa setAutoDelete()

*/

/*!

  Virtual function that creates a copy of an object that is about to

  be inserted into the collection.

  The default implementation returns the \e d pointer, i.e. no copy

  is made.

  This function is seldom reimplemented in the collection template

  classes. It is not common practice to make a copy of something

  that is being inserted.

  \sa deleteItem()

*/

QCollection::Item QCollection::newItem( Item d )

{

    return d;					// just return reference

}

/*!

  Virtual function that deletes an item that is about to be removed from

  the collection.

  The default implementation deletes \e d pointer if and only if

  auto-delete has been enabled.

  This function is always reimplemented in the collection template

  classes.

  \warning If you reimplement this function you must also reimplement

  the destructor and call the virtual function clear() from your

  destructor.  This is due to the way virtual functions and

  destructors work in C++: virtual functions in derived classes cannot

  be called from a destructor.  If you do not do this your

  deleteItem() function will not be called when the container is

  destructed.

  \sa newItem(), setAutoDelete()

*/

void QCollection::deleteItem( Item d )

{

    if ( del_item )

#if defined(Q_DELETING_VOID_UNDEFINED)

	delete (char *)d;			// default operation

#else

	delete d;				// default operation

#endif

}