| Classes - Annotated - Tree - Functions - Home - Structure

# QQueue Class Reference

The QQueue class is a template class that provides a queue. More...

`#include <qqueue.h>`

List of all member functions.

## Public Members

- QQueue ()
- QQueue ( const QQueue<type> & queue )
- ~QQueue ()
- QQueue<type>& operator= ( const QQueue<type> & queue )
- bool autoDelete () const
- void setAutoDelete ( bool enable )
- virtual uint count () const
- bool isEmpty () const
- void enqueue ( const type * d )
- type* dequeue ()
- bool remove ()
- virtual void clear ()
- type* head () const
- operator type* ()const
- type* current () const

## Detailed Description

The QQueue class is a template class that provides a queue.

QQueue is implemented as a template class. Define a template instance QQueue<X> to create a queue that operates on pointers to X, or X*.

A queue is a First In, First Out (FIFO) structure. Items are added to the back of the queue with enqueue() and retrieved from the front with dequeue().

See also Collection Classes

## Member Function Documentation

### QQueue::QQueue ()

Creates an empty queue.

### QQueue::QQueue ( const QQueue<type> & queue )

Creates a queue from another.

Only the pointers are copied (shallow copy).

### QQueue::~QQueue ()

Destroys the list. Items in the list are destroyed if autoDelete() is TRUE.

### QQueue::operator type* () const

Returns a reference to the front item in the queue. The queue is not changed.

### bool QQueue::autoDelete () const

The same as QCollection::autoDelete().

See also setAutoDelete().

### void QQueue::clear () `[virtual]`

Removes all items from the queue, deleting them if if autoDelete() is TRUE.

See also remove().

Reimplemented from QCollection.

### uint QQueue::count () const `[virtual]`

Returns the number of items in the queue.

See also isEmpty().

Reimplemented from QCollection.

### type* QQueue::current () const

Returns a reference to the front item in the queue. The queue is not changed.

### type* QQueue::dequeue ()

Takes the front item from the queue. First in, first out.

### void QQueue::enqueue ( const type * d )

Adds an item to the back of the queue. First in, first out.

### type* QQueue::head () const

Returns a reference to the front item in the queue. The queue is not changed.

### bool QQueue::isEmpty () const

Returns TRUE if there are no items to be dequeued

### QQueue<type>& QQueue::operator= ( const QQueue<type> & queue )

Assigns queue to this queue and returns a reference to this queue.

This queue is first cleared, then each item in queue is enqueued to this queue. Only the pointers are copied (shallow copy).

### bool QQueue::remove ()

Removes the front item from the queue. First in, first out. The item is deleted if autoDelete() is TRUE. Returns TRUE if there was an item to remove.

### void QQueue::setAutoDelete ( bool enable )

The same as QCollection::setAutoDelete().

See also autoDelete().

Search the documentation, FAQ, qt-interest archive and more (uses www.trolltech.com):

This file is part of the Qt toolkit, copyright © 1995-2000 Trolltech, all rights reserved.