<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/doc/qasciidict.doc:337 --> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>QAsciiDictIterator Class</title> <style type="text/css"><!-- fn { margin-left: 1cm; text-indent: -1cm; } a:link { color: #004faf; text-decoration: none } a:visited { color: #672967; text-decoration: none } body { background: #ffffff; color: black; } --></style> </head> <body> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr bgcolor="#E5E5E5"> <td valign=center> <a href="index.html"> <font color="#004faf">Home</font></a> | <a href="classes.html"> <font color="#004faf">All Classes</font></a> | <a href="mainclasses.html"> <font color="#004faf">Main Classes</font></a> | <a href="annotated.html"> <font color="#004faf">Annotated</font></a> | <a href="groups.html"> <font color="#004faf">Grouped Classes</font></a> | <a href="functions.html"> <font color="#004faf">Functions</font></a> </td> <td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QAsciiDictIterator Class Reference</h1> <p>The QAsciiDictIterator class provides an iterator for QAsciiDict collections. <a href="#details">More...</a> <p><tt>#include <<a href="qasciidict-h.html">qasciidict.h</a>></tt> <p><a href="qasciidictiterator-members.html">List of all member functions.</a> <h2>Public Members</h2> <ul> <li class=fn><a href="#QAsciiDictIterator"><b>QAsciiDictIterator</b></a> ( const QAsciiDict<type> & dict )</li> <li class=fn><a href="#~QAsciiDictIterator"><b>~QAsciiDictIterator</b></a> ()</li> <li class=fn>uint <a href="#count"><b>count</b></a> () const</li> <li class=fn>bool <a href="#isEmpty"><b>isEmpty</b></a> () const</li> <li class=fn>type * <a href="#toFirst"><b>toFirst</b></a> ()</li> <li class=fn><a href="#operator-type-*"><b>operator type *</b></a> () const</li> <li class=fn>type * <a href="#current"><b>current</b></a> () const</li> <li class=fn>const char * <a href="#currentKey"><b>currentKey</b></a> () const</li> <li class=fn>type * <a href="#operator()"><b>operator()</b></a> ()</li> <li class=fn>type * <a href="#operator++"><b>operator++</b></a> ()</li> <li class=fn>type * <a href="#operator+-eq"><b>operator+=</b></a> ( uint jump )</li> </ul> <hr><a name="details"></a><h2>Detailed Description</h2> The QAsciiDictIterator class provides an iterator for <a href="qasciidict.html">QAsciiDict</a> collections. <p> <p> QAsciiDictIterator is implemented as a template class. Define a template instance QAsciiDictIterator<X> to create a dictionary iterator that operates on QAsciiDict<X> (dictionary of X*). <p> Example: <pre> <a href="qasciidict.html">QAsciiDict</a><QLineEdit> fields; fields.<a href="qasciidict.html#insert">insert</a>( "forename", new <a href="qlineedit.html">QLineEdit</a>( this ) ); fields.<a href="qasciidict.html#insert">insert</a>( "surname", new <a href="qlineedit.html">QLineEdit</a>( this ) ); fields.<a href="qasciidict.html#insert">insert</a>( "age", new <a href="qlineedit.html">QLineEdit</a>( this ) ); fields["forename"]->setText( "Homer" ); fields["surname"]->setText( "Simpson" ); fields["age"]->setText( "45" ); QAsciiDictIterator<QLineEdit> it( fields ); for( ; it.<a href="#current">current</a>(); ++it ) cout << it.<a href="#currentKey">currentKey</a>() << ": " << it.<a href="#current">current</a>()->text() << endl; cout << endl; // Output (random order): // age: 45 // surname: Simpson // forename: Homer </pre> In the example we insert some line edits into a dictionary, then iterate over the dictionary printing the strings associated with those line edits. <p> Note that the traversal order is arbitrary; you are not guaranteed any particular order. <p> Multiple iterators may independently traverse the same dictionary. A <a href="qasciidict.html">QAsciiDict</a> knows about all the iterators that are operating on the dictionary. When an item is removed from the dictionary, QAsciiDict updates all the iterators that are referring to the removed item to point to the next item in the (arbitrary) traversal order. <p> <p>See also <a href="qasciidict.html">QAsciiDict</a>, <a href="collection.html">Collection Classes</a>, and <a href="tools.html">Non-GUI Classes</a>. <hr><h2>Member Function Documentation</h2> <h3 class=fn><a name="QAsciiDictIterator"></a>QAsciiDictIterator::QAsciiDictIterator ( const <a href="qasciidict.html">QAsciiDict</a><type> & dict ) </h3> <p> Constructs an iterator for <em>dict</em>. The current iterator item is set to point on the first item in the <em>dict</em>. <h3 class=fn><a name="~QAsciiDictIterator"></a>QAsciiDictIterator::~QAsciiDictIterator () </h3> <p> Destroys the iterator. <h3 class=fn>uint <a name="count"></a>QAsciiDictIterator::count () const </h3> <p> Returns the number of items in the dictionary this iterator operates over. <p> <p>See also <a href="#isEmpty">isEmpty</a>(). <h3 class=fn>type * <a name="current"></a>QAsciiDictIterator::current () const </h3> <p> Returns a pointer to the current iterator item. <h3 class=fn>const char * <a name="currentKey"></a>QAsciiDictIterator::currentKey () const </h3> <p> Returns a pointer to the key for the current iterator item. <h3 class=fn>bool <a name="isEmpty"></a>QAsciiDictIterator::isEmpty () const </h3> <p> Returns TRUE if the dictionary is empty, i.e. <a href="#count">count</a>() == 0, otherwise returns FALSE. <p> <p>See also <a href="#count">count</a>(). <h3 class=fn><a name="operator-type-*"></a>QAsciiDictIterator::operator type * () const </h3> <p> Cast operator. Returns a pointer to the current iterator item. Same as <a href="#current">current</a>(). <h3 class=fn>type * <a name="operator()"></a>QAsciiDictIterator::operator() () </h3> <p> Makes the succeeding item current and returns the original current item. <p> If the current iterator item was the last item in the dictionary or if it was 0, 0 is returned. <h3 class=fn>type * <a name="operator++"></a>QAsciiDictIterator::operator++ () </h3> <p> Prefix ++ makes the succeeding item current and returns the new current item. <p> If the current iterator item was the last item in the dictionary or if it was 0, 0 is returned. <h3 class=fn>type * <a name="operator+-eq"></a>QAsciiDictIterator::operator+= ( uint jump ) </h3> <p> Sets the current item to the item <em>jump</em> positions after the current item, and returns a pointer to that item. <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. <h3 class=fn>type * <a name="toFirst"></a>QAsciiDictIterator::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. <!-- eof --> <hr><p> This file is part of the <a href="index.html">Qt toolkit</a>. Copyright © 1995-2007 <a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center> <table width=100% cellspacing=0 border=0><tr> <td>Copyright © 2007 <a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a> <td align=right><div align=right>Qt 3.3.8</div> </table></div></address></body> </html>