<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <!-- /home/reggie/tmp/qt-3.1-reggie-23625/qt-x11-free-3.1.1/src/widgets/qlistview.cpp:6573 --> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>QListViewItemIterator Class</title> <style type="text/css"><!-- h3.fn,span.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>QListViewItemIterator Class Reference</h1> <p>The QListViewItemIterator class provides an iterator for collections of QListViewItems. <a href="#details">More...</a> <p><tt>#include <<a href="qlistview-h.html">qlistview.h</a>></tt> <p><a href="qlistviewitemiterator-members.html">List of all member functions.</a> <h2>Public Members</h2> <ul> <li><div class=fn><a href="#QListViewItemIterator"><b>QListViewItemIterator</b></a> ()</div></li> <li><div class=fn><a href="#QListViewItemIterator-2"><b>QListViewItemIterator</b></a> ( QListViewItem * item )</div></li> <li><div class=fn><a href="#QListViewItemIterator-3"><b>QListViewItemIterator</b></a> ( const QListViewItemIterator & it )</div></li> <li><div class=fn><a href="#QListViewItemIterator-4"><b>QListViewItemIterator</b></a> ( QListView * lv )</div></li> <li><div class=fn>QListViewItemIterator & <a href="#operator-eq"><b>operator=</b></a> ( const QListViewItemIterator & it )</div></li> <li><div class=fn><a href="#~QListViewItemIterator"><b>~QListViewItemIterator</b></a> ()</div></li> <li><div class=fn>QListViewItemIterator & <a href="#operator++"><b>operator++</b></a> ()</div></li> <li><div class=fn>const QListViewItemIterator <a href="#operator++-2"><b>operator++</b></a> ( int )</div></li> <li><div class=fn>QListViewItemIterator & <a href="#operator+-eq"><b>operator+=</b></a> ( int j )</div></li> <li><div class=fn>QListViewItemIterator & <a href="#operator--"><b>operator--</b></a> ()</div></li> <li><div class=fn>const QListViewItemIterator <a href="#operator---2"><b>operator--</b></a> ( int )</div></li> <li><div class=fn>QListViewItemIterator & <a href="#operator--eq"><b>operator-=</b></a> ( int j )</div></li> <li><div class=fn>QListViewItem * <a href="#operator*"><b>operator*</b></a> ()</div></li> <li><div class=fn>QListViewItem * <a href="#current"><b>current</b></a> () const</div></li> </ul> <hr><a name="details"></a><h2>Detailed Description</h2> The QListViewItemIterator class provides an iterator for collections of QListViewItems. <p> <p> Construct an instance of a QListViewItemIterator, with either a <a href="qlistview.html">QListView</a>* or a <a href="qlistviewitem.html">QListViewItem</a>* as argument, to operate on the tree of QListViewItems. <p> A QListViewItemIterator iterates over all the items in a list view. This means that it always makes the first child of the current item the new current item. If there is no child, the next sibling becomes the new current item; and if there is no next sibling, the next sibling of the parent becomes current. <p> The following example creates a list of all the items that have been selected by the user, storing pointers to the items in a QPtrList: <pre> <a href="qptrlist.html">QPtrList</a><QListViewItem> lst; QListViewItemIterator it( myListView ); while ( it.<a href="#current">current</a>() ) { if ( it.<a href="#current">current</a>()->isSelected() ) lst.<a href="qptrlist.html#append">append</a>( it.<a href="#current">current</a>() ); ++it; } </pre> <p> A QListViewItemIterator provides a convenient and easy way to traverse a hierarchical <a href="qlistview.html">QListView</a>. <p> Multiple QListViewItemIterators can operate on the tree of QListViewItems. A QListView knows about all iterators operating on its QListViewItems. So when a <a href="qlistviewitem.html">QListViewItem</a> gets removed all iterators that point to this item are updated and point to the following item if possible, otherwise to a valid item before the current one or to 0. <p> <p>See also <a href="qlistview.html">QListView</a>, <a href="qlistviewitem.html">QListViewItem</a>, and <a href="advanced.html">Advanced Widgets</a>. <hr><h2>Member Function Documentation</h2> <h3 class=fn><a name="QListViewItemIterator"></a>QListViewItemIterator::QListViewItemIterator () </h3> Constructs an empty iterator. <h3 class=fn><a name="QListViewItemIterator-2"></a>QListViewItemIterator::QListViewItemIterator ( <a href="qlistviewitem.html">QListViewItem</a> * item ) </h3> Constructs an iterator for the <a href="qlistview.html">QListView</a> that contains the <em>item</em>. The current iterator item is set to point to the <em>item</em>. <h3 class=fn><a name="QListViewItemIterator-3"></a>QListViewItemIterator::QListViewItemIterator ( const <a href="qlistviewitemiterator.html">QListViewItemIterator</a> & it ) </h3> Constructs an iterator for the same <a href="qlistview.html">QListView</a> as <em>it</em>. The current iterator item is set to point on the current item of <em>it</em>. <h3 class=fn><a name="QListViewItemIterator-4"></a>QListViewItemIterator::QListViewItemIterator ( <a href="qlistview.html">QListView</a> * lv ) </h3> Constructs an iterator for the <a href="qlistview.html">QListView</a> <em>lv</em>. The current iterator item is set to point on the first child (<a href="qlistviewitem.html">QListViewItem</a>) of <em>lv</em>. <h3 class=fn><a name="~QListViewItemIterator"></a>QListViewItemIterator::~QListViewItemIterator () </h3> Destroys the iterator. <h3 class=fn><a href="qlistviewitem.html">QListViewItem</a> * <a name="current"></a>QListViewItemIterator::current () const </h3> Returns iterator's current item. <p>Examples: <a href="addressbook-example.html#x564">addressbook/centralwidget.cpp</a>, <a href="checklists-example.html#x365">checklists/checklists.cpp</a>, and <a href="dirview-example.html#x1766">dirview/dirview.cpp</a>. <h3 class=fn><a href="qlistviewitem.html">QListViewItem</a> * <a name="operator*"></a>QListViewItemIterator::operator* () </h3> Dereference operator. Returns a reference to the current item. The same as <a href="#current">current</a>(). <h3 class=fn><a href="qlistviewitemiterator.html">QListViewItemIterator</a> & <a name="operator++"></a>QListViewItemIterator::operator++ () </h3> Prefix ++. Makes the next item the new current item and returns it. Returns 0 if the current item is the last item or the <a href="qlistview.html">QListView</a> is 0. <h3 class=fn>const <a href="qlistviewitemiterator.html">QListViewItemIterator</a> <a name="operator++-2"></a>QListViewItemIterator::operator++ ( int ) </h3> This is an overloaded member function, provided for convenience. It behaves essentially like the above function. <p> Postfix ++. Makes the next item the new current item and returns the item that <em>was</em> the current item. <h3 class=fn><a href="qlistviewitemiterator.html">QListViewItemIterator</a> & <a name="operator+-eq"></a>QListViewItemIterator::operator+= ( int j ) </h3> Sets the current item to the item <em>j</em> positions after the current item. If that item is beyond the last item, the current item is set to 0. Returns the current item. <h3 class=fn><a href="qlistviewitemiterator.html">QListViewItemIterator</a> & <a name="operator--"></a>QListViewItemIterator::operator-- () </h3> Prefix --. Makes the previous item the new current item and returns it. Returns 0 if the current item is the first item or the <a href="qlistview.html">QListView</a> is 0. <h3 class=fn>const <a href="qlistviewitemiterator.html">QListViewItemIterator</a> <a name="operator---2"></a>QListViewItemIterator::operator-- ( int ) </h3> This is an overloaded member function, provided for convenience. It behaves essentially like the above function. <p> Postfix --. Makes the previous item the new current item and returns the item that <em>was</em> the current item. <h3 class=fn><a href="qlistviewitemiterator.html">QListViewItemIterator</a> & <a name="operator--eq"></a>QListViewItemIterator::operator-= ( int j ) </h3> Sets the current item to the item <em>j</em> positions before the current item. If that item is before the first item, the current item is set to 0. Returns the current item. <h3 class=fn><a href="qlistviewitemiterator.html">QListViewItemIterator</a> & <a name="operator-eq"></a>QListViewItemIterator::operator= ( const <a href="qlistviewitemiterator.html">QListViewItemIterator</a> & it ) </h3> Assignment. Makes a copy of <em>it</em> and returns a reference to its iterator. <!-- eof --> <hr><p> This file is part of the <a href="index.html">Qt toolkit</a>. Copyright © 1995-2002 <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 © 2002 <a href="http://www.trolltech.com">Trolltech</a><td><a href="http://www.trolltech.com/trademarks.html">Trademarks</a> <td align=right><div align=right>Qt version 3.1.1</div> </table></div></address></body> </html>