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<p>The Q3PtrDictIterator class provides an iterator for <a href="q3ptrdict.html">Q3PtrDict</a> collections. <a href="#details">More...</a></p>
<pre> #include <Q3PtrDictIterator></pre><p><b>This class is part of the Qt 3 support library.</b> It is provided to keep old source code working. We strongly advise against using it in new code. See <a href="porting4.html">Porting to Qt 4</a> for more information.</p>
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<li><a href="q3ptrdictiterator-members.html">List of all members, including inherited members</a></li>
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<h2>Public Functions</h2>
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<tr><td class="memItemLeft" align="right" valign="top"></td><td class="memItemRight" valign="bottom"><b><a href="q3ptrdictiterator.html#Q3PtrDictIterator">Q3PtrDictIterator</a></b> ( const Q3PtrDict<type> & <i>dict</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"></td><td class="memItemRight" valign="bottom"><b><a href="q3ptrdictiterator.html#dtor.Q3PtrDictIterator">~Q3PtrDictIterator</a></b> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">uint </td><td class="memItemRight" valign="bottom"><b><a href="q3ptrdictiterator.html#count">count</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">type * </td><td class="memItemRight" valign="bottom"><b><a href="q3ptrdictiterator.html#current">current</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void * </td><td class="memItemRight" valign="bottom"><b><a href="q3ptrdictiterator.html#currentKey">currentKey</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><b><a href="q3ptrdictiterator.html#isEmpty">isEmpty</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">type * </td><td class="memItemRight" valign="bottom"><b><a href="q3ptrdictiterator.html#toFirst">toFirst</a></b> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"></td><td class="memItemRight" valign="bottom"><b><a href="q3ptrdictiterator.html#operator-type--2a">operator type *</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">type * </td><td class="memItemRight" valign="bottom"><b><a href="q3ptrdictiterator.html#operator-28-29">operator()</a></b> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">type * </td><td class="memItemRight" valign="bottom"><b><a href="q3ptrdictiterator.html#operator-2b-2b">operator++</a></b> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">type * </td><td class="memItemRight" valign="bottom"><b><a href="q3ptrdictiterator.html#operator-2b-eq">operator+=</a></b> ( uint <i>jump</i> )</td></tr>
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<h2>Detailed Description</h2>
<p>The Q3PtrDictIterator class provides an iterator for <a href="q3ptrdict.html">Q3PtrDict</a> collections.</p>
<p>Q3PtrDictIterator is implemented as a template class. Define a template instance Q3PtrDictIterator<X> to create a dictionary iterator that operates on <a href="q3ptrdict.html">Q3PtrDict</a><X> (dictionary of X*).</p>
<p>Example:</p>
<pre> Q3PtrDict<char> fields;
QLineEdit *le1 = new QLineEdit( this );
le1->setText( "Simpson" );
QLineEdit *le2 = new QLineEdit( this );
le2->setText( "Homer" );
QLineEdit *le3 = new QLineEdit( this );
le3->setText( "45" );
fields.insert( le1, "Surname" );
fields.insert( le2, "Forename" );
fields.insert( le3, "Age" );
Q3PtrDictIterator<char> it( fields );
for( ; it.current(); ++it ) {
QLineEdit *le = (QLineEdit)it.currentKey();
cout << it.current() << ": " << le->text() << endl;
}
cout << endl;
// Output (random order):
// Forename: Homer
// Age: 45
// Surname: Simpson</pre>
<p>In the example we insert some line edits into a dictionary, associating a string with each. We then iterate over the dictionary printing the associated strings.</p>
<p>Multiple iterators may independently traverse the same dictionary. A <a href="q3ptrdict.html">Q3PtrDict</a> knows about all the iterators that are operating on the dictionary. When an item is removed from the dictionary, <a href="q3ptrdict.html">Q3PtrDict</a> updates all iterators that refer the removed item to point to the next item in the traversing order.</p>
<p>See also <a href="q3ptrdict.html">Q3PtrDict</a>.</p>
<hr />
<h2>Member Function Documentation</h2>
<a name="//apple_ref/cpp/instm/Q3PtrDictIterator/Q3PtrDictIterator"></a>
<h3 class="fn"><a name="Q3PtrDictIterator"></a>Q3PtrDictIterator::Q3PtrDictIterator ( const <a href="q3ptrdict.html">Q3PtrDict</a><type> & <i>dict</i> )</h3>
<p>Constructs an iterator for <i>dict</i>. The current iterator item is set to point on the first item in the <i>dict</i>.</p>
<a name="//apple_ref/cpp/instm/Q3PtrDictIterator/~Q3PtrDictIterator"></a>
<h3 class="fn"><a name="dtor.Q3PtrDictIterator"></a>Q3PtrDictIterator::~Q3PtrDictIterator ()</h3>
<p>Destroys the iterator.</p>
<a name="//apple_ref/cpp/instm/Q3PtrDictIterator/count"></a>
<h3 class="fn"><a name="count"></a><a href="qtglobal.html#uint-typedef">uint</a> Q3PtrDictIterator::count () const</h3>
<p>Returns the number of items in the dictionary this iterator operates on.</p>
<p>See also <a href="q3ptrdictiterator.html#isEmpty">isEmpty</a>().</p>
<a name="//apple_ref/cpp/instm/Q3PtrDictIterator/current"></a>
<h3 class="fn"><a name="current"></a>type * Q3PtrDictIterator::current () const</h3>
<p>Returns a pointer to the current iterator item's value.</p>
<a name="//apple_ref/cpp/instm/Q3PtrDictIterator/currentKey"></a>
<h3 class="fn"><a name="currentKey"></a>void * Q3PtrDictIterator::currentKey () const</h3>
<p>Returns the current iterator item's key.</p>
<a name="//apple_ref/cpp/instm/Q3PtrDictIterator/isEmpty"></a>
<h3 class="fn"><a name="isEmpty"></a>bool Q3PtrDictIterator::isEmpty () const</h3>
<p>Returns TRUE if the dictionary is empty; otherwise returns FALSE.</p>
<p>See also <a href="q3ptrdictiterator.html#count">count</a>().</p>
<a name="//apple_ref/cpp/instm/Q3PtrDictIterator/toFirst"></a>
<h3 class="fn"><a name="toFirst"></a>type * Q3PtrDictIterator::toFirst ()</h3>
<p>Sets the current iterator item to point to the first item in the dictionary and returns a pointer to the item. If the dictionary is empty, it sets the current item to 0 and returns 0.</p>
<a name="//apple_ref/cpp/instm/Q3PtrDictIterator/operator type *"></a>
<h3 class="fn"><a name="operator-type--2a"></a>Q3PtrDictIterator::operator type * () const</h3>
<p>Cast operator. Returns a pointer to the current iterator item. Same as <a href="q3ptrdictiterator.html#current">current</a>().</p>
<a name="//apple_ref/cpp/instm/Q3PtrDictIterator/operator"></a>
<h3 class="fn"><a name="operator-28-29"></a>type * Q3PtrDictIterator::operator() ()</h3>
<p>Makes the succeeding item current and returns the original current item.</p>
<p>If the current iterator item was the last item in the dictionary or if it was 0, 0 is returned.</p>
<a name="//apple_ref/cpp/instm/Q3PtrDictIterator/operator++"></a>
<h3 class="fn"><a name="operator-2b-2b"></a>type * Q3PtrDictIterator::operator++ ()</h3>
<p>Prefix ++ makes the succeeding item current and returns the new current item.</p>
<p>If the current iterator item was the last item in the dictionary or if it was 0, 0 is returned.</p>
<a name="//apple_ref/cpp/instm/Q3PtrDictIterator/operator+="></a>
<h3 class="fn"><a name="operator-2b-eq"></a>type * Q3PtrDictIterator::operator+= ( <a href="qtglobal.html#uint-typedef">uint</a> <i>jump</i> )</h3>
<p>Sets the current item to the item <i>jump</i> positions after the current item and returns a pointer to that item.</p>
<p>If that item is beyond the last item or if the dictionary is empty, it sets the current item to 0 and returns 0.</p>
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