Contents

• Public Functions
• Detailed Description

Detailed Description

TheQ3IntDictIterator class provides an iterator forQ3IntDict collections.

Q3IntDictIterator is implemented as a template class. Define a template instanceQ3IntDictIterator<X> to create a dictionary iterator that operates onQ3IntDict<X> (dictionary of X*).

Example:

Q3IntDict<QLineEdit> fields;for (int i=0; i<3; i++ )    fields.insert( i,newQLineEdit(this ) );fields[0]->setText("Homer" );fields[1]->setText("Simpson" );fields[2]->setText("45" );Q3IntDictIterator<QLineEdit> it( fields );for ( ; it.current();++it )    cout<< it.currentKey()<<": "<< it.current()->text()<< endl;// Output (random order)://      0: Homer//      1: Simpson//      2: 45

Note that the traversal order is arbitrary; you are not guaranteed the order shown above.

Multiple iterators may independently traverse the same dictionary. AQ3IntDict knows about all the iterators that are operating on the dictionary. When an item is removed from the dictionary,Q3IntDict updates all iterators that refer the removed item to point to the next item in the traversal order.

Member Function Documentation

Q3IntDictIterator::Q3IntDictIterator(constQ3IntDict<type> & dict)

Constructs an iterator fordict. The current iterator item is set to point to the 'first' item in thedict. The first item refers to the first item in the dictionary's arbitrary internal ordering.

Q3IntDictIterator::~Q3IntDictIterator()

Destroys the iterator.

uint Q3IntDictIterator::count() const

Returns the number of items in the dictionary this iterator operates over.

See alsoisEmpty().

type * Q3IntDictIterator::current() const

Returns a pointer to the current iterator item.

long Q3IntDictIterator::currentKey() const

Returns the key for the current iterator item.

bool Q3IntDictIterator::isEmpty() const

Returns TRUE if the dictionary is empty; otherwise eturns FALSE.

See alsocount().

type * Q3IntDictIterator::toFirst()

Sets the current iterator item to point to the first item in the dictionary and returns a pointer to the item. The first item refers to the first item in the dictionary's arbitrary internal ordering. If the dictionary is empty it sets the current item to 0 and returns 0.

Q3IntDictIterator::operator type *() const

Cast operator. Returns a pointer to the current iterator item. Same ascurrent().

type * Q3IntDictIterator::operator()()

Makes the succeeding item current and returns the original current item.

If the current iterator item was the last item in the dictionary or if it was 0, 0 is returned.

type * Q3IntDictIterator::operator++()

Prefix ++ makes the succeeding item current and returns the new current item.

If the current iterator item was the last item in the dictionary or if it was 0, 0 is returned.

type * Q3IntDictIterator::operator+=(uint jump)

Sets the current item to the itemjump positions after the current item, and returns a pointer to that item.

If that item is beyond the last item or if the dictionary is empty, it sets the current item to 0 and returns 0.