<!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/src/kernel/qfocusdata.cpp:40 --> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>TQFocusData 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>TQFocusData Class Reference</h1> <p>The TQFocusData class maintains the list of widgets in the focus chain. <a href="#details">More...</a> <p><tt>#include <<a href="qfocusdata-h.html">ntqfocusdata.h</a>></tt> <p><a href="qfocusdata-members.html">List of all member functions.</a> <h2>Public Members</h2> <ul> <li class=fn>TQWidget * <a href="#focusWidget"><b>focusWidget</b></a> () const</li> <li class=fn>TQWidget * <a href="#home"><b>home</b></a> ()</li> <li class=fn>TQWidget * <a href="#next"><b>next</b></a> ()</li> <li class=fn>TQWidget * <a href="#prev"><b>prev</b></a> ()</li> <li class=fn>TQWidget * <a href="#first"><b>first</b></a> () const</li> <li class=fn>TQWidget * <a href="#last"><b>last</b></a> () const</li> <li class=fn>int <a href="#count"><b>count</b></a> () const</li> </ul> <hr><a name="details"></a><h2>Detailed Description</h2> The TQFocusData class maintains the list of widgets in the focus chain. <p> <p> This read-only list always contains at least one widget (i.e. the top-level widget). It provides a simple cursor which can be reset to the current focus widget using <a href="#home">home</a>(), or moved to its neighboring widgets using <a href="#next">next</a>() and <a href="#prev">prev</a>(). You can also retrieve the <a href="#count">count</a>() of the number of widgets in the list. The list is a loop, so if you keep iterating, for example using next(), you will never come to the end. <p> Some widgets in the list may not accept focus. Widgets are added to the list as necessary, but not removed from it. This lets widgets change focus policy dynamically without disrupting the focus chain the user experiences. When a widget disables and re-enables tab focus, its position in the focus chain does not change. <p> When reimplementing <a href="ntqwidget.html#focusNextPrevChild">TQWidget::focusNextPrevChild</a>() to provide special focus flow, you will usually call <a href="ntqwidget.html#focusData">TQWidget::focusData</a>() to retrieve the focus data stored at the top-level widget. A top-level widget's focus data contains the focus list for its hierarchy of widgets. <p> The cursor may change at any time. <p> This class is <em>not</em> thread-safe. <p> <p>See also <a href="ntqwidget.html#focusNextPrevChild">TQWidget::focusNextPrevChild</a>(), <a href="ntqwidget.html#setTabOrder">TQWidget::setTabOrder</a>(), <a href="ntqwidget.html#focusPolicy-prop">TQWidget::focusPolicy</a>, and <a href="misc.html">Miscellaneous Classes</a>. <hr><h2>Member Function Documentation</h2> <h3 class=fn>int <a name="count"></a>TQFocusData::count () const </h3> <p> Returns the number of widgets in the focus chain. <h3 class=fn><a href="ntqwidget.html">TQWidget</a> * <a name="first"></a>TQFocusData::first () const </h3> Returns the first widget in the focus chain. The cursor is not modified. <h3 class=fn><a href="ntqwidget.html">TQWidget</a> * <a name="focusWidget"></a>TQFocusData::focusWidget () const </h3> <p> Returns the widgets in the hierarchy that are in the focus chain. <h3 class=fn><a href="ntqwidget.html">TQWidget</a> * <a name="home"></a>TQFocusData::home () </h3> Moves the cursor to the <a href="#focusWidget">focusWidget</a>() and returns that widget. You must call this before <a href="#next">next</a>() or <a href="#prev">prev</a>() to iterate meaningfully. <h3 class=fn><a href="ntqwidget.html">TQWidget</a> * <a name="last"></a>TQFocusData::last () const </h3> Returns the last widget in the focus chain. The cursor is not modified. <h3 class=fn><a href="ntqwidget.html">TQWidget</a> * <a name="next"></a>TQFocusData::next () </h3> Moves the cursor to the next widget in the focus chain. There is <em>always</em> a next widget because the list is a loop. <h3 class=fn><a href="ntqwidget.html">TQWidget</a> * <a name="prev"></a>TQFocusData::prev () </h3> Moves the cursor to the previous widget in the focus chain. There is <em>always</em> a previous widget because the list is a loop. <!-- 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>