QHashIterator Class

QHash<int, QWidget *> hash;
...
QHashIterator<int, QWidget *> i(hash);
while (i.hasNext()) {
    i.next();
    qDebug() << i.key() << ": " << i.value();
}

QHashIterator<int, QWidget *> i(hash);
while (i.findNext(widget)) {
    qDebug() << "Found widget " << widget << " under key "
             << i.key();
}

Member Function Documentation

bool QHashIterator::findNext(const T &value)

Searches for value starting from the current iterator position forward. Returns true if a (key, value) pair with value value is found; otherwise returns false.

After the call, if value was found, the iterator is positioned just after the matching item; otherwise, the iterator is positioned at the back of the container.

const Key &QHashIterator::key() const

Returns the key of the last item that was jumped over using one of the traversal functions (next(), findNext()).

See also value().

bool QHashIterator::hasNext() const

Returns true if there is at least one item ahead of the iterator, i.e. the iterator is not at the back of the container; otherwise returns false.

See also next().

void QHashIterator::toBack()

Moves the iterator to the back of the container (after the last item).

See also toFront().

void QHashIterator::toFront()

Moves the iterator to the front of the container (before the first item).

See also toBack() and next().

QHashIterator<Key, T> &QHashIterator::operator=(const QHash<Key, T> &container)

Makes the iterator operate on hash. The iterator is set to be at the front of the hash (before the first item).

See also toFront() and toBack().

QHashIterator::QHashIterator(const QHash<Key, T> &hash)

Constructs an iterator for traversing hash. The iterator is set to be at the front of the hash (before the first item).

See also operator=().

QHashIterator::Item QHashIterator::next()

Returns the next item and advances the iterator by one position.

Call key() on the return value to obtain the item's key, and value() to obtain the value.

Calling this function on an iterator located at the back of the container leads to undefined results.

See also hasNext() and peekNext().

QHashIterator::Item QHashIterator::peekNext() const

Returns the next item without moving the iterator.

Call key() on the return value to obtain the item's key, and value() to obtain the value.

Calling this function on an iterator located at the back of the container leads to undefined results.

See also hasNext() and next().

const T &QHashIterator::value() const

Returns the value of the last item that was jumped over using one of the traversal functions (next(), findNext()).

See also key().