<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>TQGLayoutIterator 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>TQGLayoutIterator Class Reference</h1> <p>The TQGLayoutIterator class is an abstract base class of internal layout iterators. <a href="#details">More...</a> <p><tt>#include <<a href="tqlayout-h.html">tqlayout.h</a>></tt> <p><a href="tqglayoutiterator-members.html">List of all member functions.</a> <h2>Public Members</h2> <ul> <li class=fn>virtual <a href="#~TQGLayoutIterator"><b>~TQGLayoutIterator</b></a> ()</li> <li class=fn>virtual TQLayoutItem * <a href="#next"><b>next</b></a> () = 0</li> <li class=fn>virtual TQLayoutItem * <a href="#current"><b>current</b></a> () = 0</li> <li class=fn>virtual TQLayoutItem * <a href="#takeCurrent"><b>takeCurrent</b></a> () = 0</li> </ul> <hr><a name="details"></a><h2>Detailed Description</h2> The TQGLayoutIterator class is an abstract base class of internal layout iterators. <p> <p> (This class is <em>not</em> OpenGL related, it just happens to start with the letters <a href="tqgl.html">TQGL</a>...) <p> Subclass this class to create a custom layout. The functions that must be implemented are <a href="#next">next</a>(), <a href="#current">current</a>(), and <a href="#takeCurrent">takeCurrent</a>(). <p> The TQGLayoutIterator implements the functionality of <a href="tqlayoutiterator.html">TQLayoutIterator</a>. Each subclass of <a href="tqlayout.html">TQLayout</a> needs a TQGLayoutIterator subclass. <p>See also <a href="appearance.html">Widget Appearance and Style</a> and <a href="geomanagement.html">Layout Management</a>. <hr><h2>Member Function Documentation</h2> <h3 class=fn><a name="~TQGLayoutIterator"></a>TQGLayoutIterator::~TQGLayoutIterator ()<tt> [virtual]</tt> </h3> Destroys the iterator <h3 class=fn><a href="tqlayoutitem.html">TQLayoutItem</a> * <a name="current"></a>TQGLayoutIterator::current ()<tt> [pure virtual]</tt> </h3> <p> Implemented in subclasses to return the current item, or 0 if there is no current item. <p>Examples: <a href="customlayout-example.html#x1486">customlayout/border.cpp</a>, <a href="customlayout-example.html#x1508">customlayout/card.cpp</a>, and <a href="customlayout-example.html#x1464">customlayout/flow.cpp</a>. <h3 class=fn><a href="tqlayoutitem.html">TQLayoutItem</a> * <a name="next"></a>TQGLayoutIterator::next ()<tt> [pure virtual]</tt> </h3> <p> Implemented in subclasses to move the iterator to the next item and return that item, or 0 if there is no next item. <p>Examples: <a href="customlayout-example.html#x1487">customlayout/border.cpp</a>, <a href="customlayout-example.html#x1509">customlayout/card.cpp</a>, and <a href="customlayout-example.html#x1465">customlayout/flow.cpp</a>. <h3 class=fn><a href="tqlayoutitem.html">TQLayoutItem</a> * <a name="takeCurrent"></a>TQGLayoutIterator::takeCurrent ()<tt> [pure virtual]</tt> </h3> <p> Implemented in subclasses. The function must remove the current item from the layout without deleting it, move the iterator to the next item and return the removed item, or 0 if no item was removed. <p>Examples: <a href="customlayout-example.html#x1488">customlayout/border.cpp</a>, <a href="customlayout-example.html#x1510">customlayout/card.cpp</a>, and <a href="customlayout-example.html#x1466">customlayout/flow.cpp</a>. <!-- eof --> <hr><p> This file is part of the <a href="index.html">TQt 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>TQt 3.3.8</div> </table></div></address></body> </html>