diff options
Diffstat (limited to 'doc/html/qdictiterator.html')
| -rw-r--r-- | doc/html/qdictiterator.html | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/doc/html/qdictiterator.html b/doc/html/qdictiterator.html new file mode 100644 index 0000000..f7ed1af --- /dev/null +++ b/doc/html/qdictiterator.html @@ -0,0 +1,172 @@ +<!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/qdict.doc:410 --> +<html> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> +<title>QDictIterator 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>QDictIterator Class Reference</h1> + +<p>The QDictIterator class provides an iterator for QDict collections. +<a href="#details">More...</a> +<p><tt>#include <<a href="qdict-h.html">qdict.h</a>></tt> +<p><a href="qdictiterator-members.html">List of all member functions.</a> +<h2>Public Members</h2> +<ul> +<li class=fn><a href="#QDictIterator"><b>QDictIterator</b></a> ( const QDict<type> & dict )</li> +<li class=fn><a href="#~QDictIterator"><b>~QDictIterator</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>QString <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> +</ul> +<hr><a name="details"></a><h2>Detailed Description</h2> + + +The QDictIterator class provides an iterator for <a href="qdict.html">QDict</a> collections. +<p> + +<p> QDictIterator is implemented as a template class. Define a +template instance QDictIterator<X> to create a dictionary +iterator that operates on QDict<X> (dictionary of X*). +<p> The traversal order is arbitrary; when we speak of the "first", +"last" and "next" item we are talking in terms of this arbitrary +order. +<p> Multiple iterators may independently traverse the same dictionary. +A QDict knows about all the iterators that are operating on the +dictionary. When an item is removed from the dictionary, QDict +updates all iterators that are referring to the removed item to +point to the next item in the (arbitrary) traversal order. +<p> Example: +<pre> + <a href="qdict.html">QDict</a><QLineEdit> fields; + fields.<a href="qdict.html#insert">insert</a>( "forename", new <a href="qlineedit.html">QLineEdit</a>( this ) ); + fields.<a href="qdict.html#insert">insert</a>( "surname", new <a href="qlineedit.html">QLineEdit</a>( this ) ); + fields.<a href="qdict.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" ); + + QDictIterator<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 pointers to line edits into a +dictionary, then iterate over the dictionary printing the strings +associated with the line edits. +<p> <p>See also <a href="qdict.html">QDict</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="QDictIterator"></a>QDictIterator::QDictIterator ( const <a href="qdict.html">QDict</a><type> & dict ) +</h3> + +<p> Constructs an iterator for <em>dict</em>. The current iterator item is +set to point to the first item in the dictionary, <em>dict</em>. First +in this context means first in the arbitrary traversal order. + +<h3 class=fn><a name="~QDictIterator"></a>QDictIterator::~QDictIterator () +</h3> + +<p> Destroys the iterator. + +<h3 class=fn>uint <a name="count"></a>QDictIterator::count () const +</h3> + +<p> Returns the number of items in the dictionary over which the +iterator is operating. +<p> <p>See also <a href="#isEmpty">isEmpty</a>(). + +<h3 class=fn>type * <a name="current"></a>QDictIterator::current () const +</h3> + +<p> Returns a pointer to the current iterator item's value. + +<h3 class=fn><a href="qstring.html">QString</a> <a name="currentKey"></a>QDictIterator::currentKey () const +</h3> + +<p> Returns the current iterator item's key. + +<h3 class=fn>bool <a name="isEmpty"></a>QDictIterator::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>QDictIterator::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>QDictIterator::operator() () +</h3> + +<p> Makes the next 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>QDictIterator::operator++ () +</h3> + +<p> Prefix ++ makes the next 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="toFirst"></a>QDictIterator::toFirst () +</h3> + +<p> Resets the iterator, making the first item the first current item. +First in this context means first in the arbitrary traversal +order. Returns a pointer to this item. +<p> 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> |