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124 lines
5.5 KiB
124 lines
5.5 KiB
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/kernel/qfocusdata.cpp:40 -->
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<html>
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<title>TQFocusData Class</title>
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<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>
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<p>The TQFocusData class maintains the list of widgets in the focus
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chain.
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<a href="#details">More...</a>
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<p><tt>#include <<a href="qfocusdata-h.html">ntqfocusdata.h</a>></tt>
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<p><a href="qfocusdata-members.html">List of all member functions.</a>
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<h2>Public Members</h2>
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<ul>
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<li class=fn>TQWidget * <a href="#focusWidget"><b>focusWidget</b></a> () const</li>
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<li class=fn>TQWidget * <a href="#home"><b>home</b></a> ()</li>
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<li class=fn>TQWidget * <a href="#next"><b>next</b></a> ()</li>
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<li class=fn>TQWidget * <a href="#prev"><b>prev</b></a> ()</li>
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<li class=fn>TQWidget * <a href="#first"><b>first</b></a> () const</li>
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<li class=fn>TQWidget * <a href="#last"><b>last</b></a> () const</li>
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<li class=fn>int <a href="#count"><b>count</b></a> () const</li>
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</ul>
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<hr><a name="details"></a><h2>Detailed Description</h2>
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The TQFocusData class maintains the list of widgets in the focus
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chain.
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<p>
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<p> This read-only list always contains at least one widget (i.e. the
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top-level widget). It provides a simple cursor which can be reset
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to the current focus widget using <a href="#home">home</a>(), or moved to its
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neighboring widgets using <a href="#next">next</a>() and <a href="#prev">prev</a>(). You can also retrieve
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the <a href="#count">count</a>() of the number of widgets in the list. The list is a
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loop, so if you keep iterating, for example using next(), you will
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never come to the end.
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<p> Some widgets in the list may not accept focus. Widgets are added
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to the list as necessary, but not removed from it. This lets
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widgets change focus policy dynamically without disrupting the
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focus chain the user experiences. When a widget disables and
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re-enables tab focus, its position in the focus chain does not
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change.
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<p> When reimplementing <a href="ntqwidget.html#focusNextPrevChild">TQWidget::focusNextPrevChild</a>() to provide
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special focus flow, you will usually call <a href="ntqwidget.html#focusData">TQWidget::focusData</a>() to
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retrieve the focus data stored at the top-level widget. A
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top-level widget's focus data contains the focus list for its
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hierarchy of widgets.
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<p> The cursor may change at any time.
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<p> This class is <em>not</em> thread-safe.
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<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>.
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<hr><h2>Member Function Documentation</h2>
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<h3 class=fn>int <a name="count"></a>TQFocusData::count () const
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</h3>
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<p> Returns the number of widgets in the focus chain.
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<h3 class=fn><a href="ntqwidget.html">TQWidget</a> * <a name="first"></a>TQFocusData::first () const
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</h3>
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Returns the first widget in the focus chain.
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The cursor is not modified.
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<h3 class=fn><a href="ntqwidget.html">TQWidget</a> * <a name="focusWidget"></a>TQFocusData::focusWidget () const
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</h3>
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<p> Returns the widgets in the hierarchy that are in the focus chain.
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<h3 class=fn><a href="ntqwidget.html">TQWidget</a> * <a name="home"></a>TQFocusData::home ()
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</h3>
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Moves the cursor to the <a href="#focusWidget">focusWidget</a>() and returns that widget. You
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must call this before <a href="#next">next</a>() or <a href="#prev">prev</a>() to iterate meaningfully.
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<h3 class=fn><a href="ntqwidget.html">TQWidget</a> * <a name="last"></a>TQFocusData::last () const
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</h3>
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Returns the last widget in the focus chain.
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The cursor is not modified.
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<h3 class=fn><a href="ntqwidget.html">TQWidget</a> * <a name="next"></a>TQFocusData::next ()
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</h3>
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Moves the cursor to the next widget in the focus chain. There is
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<em>always</em> a next widget because the list is a loop.
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<h3 class=fn><a href="ntqwidget.html">TQWidget</a> * <a name="prev"></a>TQFocusData::prev ()
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</h3>
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Moves the cursor to the previous widget in the focus chain. There
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is <em>always</em> a previous widget because the list is a loop.
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This file is part of the <a href="index.html">TQt toolkit</a>.
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Copyright © 1995-2007
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<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
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<td>Copyright © 2007
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<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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<td align=right><div align=right>TQt 3.3.8</div>
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