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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><meta name="robots" content="noindex,noarchive">
<title>Qt Toolkit - QFocusData Class</title><style type="text/css"><!--
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<h1 align=center>QFocusData Class Reference</h1><br clear="all">
<p>
Maintains the list of widgets which can take focus.
<a href="#details">More...</a>
<p>
<code>#include <<a href="qfocusdata-h.html">qfocusdata.h</a>></code>
<p><a href="qfocusdata-members.html">List of all member functions.</a>
<h2>Public Members</h2>
<ul>
<li><span class="fn">QWidget*<a href="qfocusdata.html#a0"><strong>focusWidget</strong></a>()const</span>
<li><span class="fn">QWidget*<a href="qfocusdata.html#a1"><strong>home</strong></a>()</span>
<li><span class="fn">QWidget*<a href="qfocusdata.html#a2"><strong>next</strong></a>()</span>
<li><span class="fn">QWidget*<a href="qfocusdata.html#a3"><strong>prev</strong></a>()</span>
<li><span class="fn">int<a href="qfocusdata.html#a4"><strong>count</strong></a>()const</span>
</ul>
<hr><h2><a name="details"></a>Detailed Description</h2>
Maintains the list of widgets which can take focus.
<p>
This read-only list always contains at least one widget (the
top-level widget, actually). It provides a simple cursor, which can
be reset to the current focus widget using <a href="qfocusdata.html#a1">home</a>(), or moved to its
neighboring widgets using <a href="qfocusdata.html#a2">next</a>() and <a href="qfocusdata.html#a3">prev</a>(), and a <a href="qfocusdata.html#a4">count</a>() of
widgets in the list.
<p>Note that 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 sees: When a widget disables and re-enables tab
focus, its position in the focus chain does not change.
<p>When reimplementing <a href="qwidget.html#q3">QWidget::focusNextPrevChild</a>() to provide special
focus flow, you will usually call <a href="qwidget.html#q5">QWidget::focusData</a>() to retrieve
the focus data stored at the top-level widget - the focus data for
that hierarchy of widgets.
<p>The cursor may change at any time; this class is not thread-safe.
<p>See also: <a href="qwidget.html#q3">QWidget::focusNextPrevChild</a>(), <a href="qwidget.html#u1">QWidget::setTabOrder</a>() and <a href="qwidget.html#i0">QWidget::setFocusPolicy</a>().
<hr><h2>Member Function Documentation</h2>
<h3 class="fn">int<a name="a4"></a>QFocusData::count()const</h3>
<p>Returns a count of the number of widgets in the hierarchy which accept focus.
<h3 class="fn"><a href="qwidget.html">QWidget</a>*<a name="a0"></a>QFocusData::focusWidget()const</h3>
<p>Returns the widgets in the hierarchy which currently has focus.
<h3 class="fn"><a href="qwidget.html">QWidget</a>*<a name="a1"></a>QFocusData::home()</h3>
<p>Moves the cursor to the <a href="qfocusdata.html#a0">focusWidget</a>() and returns that widget.
You must call this before <a href="qfocusdata.html#a2">next</a>() or <a href="qfocusdata.html#a3">prev</a>() to iterate meaningfully.
<h3 class="fn"><a href="qwidget.html">QWidget</a>*<a name="a2"></a>QFocusData::next()</h3>
<p>Moves the cursor to the right. Note that the focus widgets
are a <em>loop</em> of widgets. If you keep calling next(), it will
loop, without ever returning 0.
<h3 class="fn"><a href="qwidget.html">QWidget</a>*<a name="a3"></a>QFocusData::prev()</h3>
<p>Moves the cursor to the left. Note that the focus widgets
are a <em>loop</em> of widgets. If you keep calling prev(), it will
loop, without ever returning 0.
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This file is part of the <a href="index.html">Qt toolkit</a>,
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It was generated from the following files:
<ul>
<li>qfocusdata.h: 1998/08/25
<li>qfocusdata.cpp: 1998/08/12
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