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6<title>QGLayoutIterator Class</title>
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32<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QGLayoutIterator Class Reference</h1>
33
34<p>The QGLayoutIterator class is an abstract base class of internal layout iterators.
35<a href="#details">More...</a>
36<p><tt>#include &lt;<a href="qlayout-h.html">qlayout.h</a>&gt;</tt>
37<p><a href="qglayoutiterator-members.html">List of all member functions.</a>
38<h2>Public Members</h2>
39<ul>
40<li class=fn>virtual <a href="#~QGLayoutIterator"><b>~QGLayoutIterator</b></a> ()</li>
41<li class=fn>virtual QLayoutItem * <a href="#next"><b>next</b></a> () = 0</li>
42<li class=fn>virtual QLayoutItem * <a href="#current"><b>current</b></a> () = 0</li>
43<li class=fn>virtual QLayoutItem * <a href="#takeCurrent"><b>takeCurrent</b></a> () = 0</li>
44</ul>
45<hr><a name="details"></a><h2>Detailed Description</h2>
46
47
48The QGLayoutIterator class is an abstract base class of internal layout iterators.
49<p>
50
51<p> (This class is <em>not</em> OpenGL related, it just happens to start with
52the letters <a href="qgl.html">QGL</a>...)
53<p> Subclass this class to create a custom layout. The functions that
54must be implemented are <a href="#next">next</a>(), <a href="#current">current</a>(), and <a href="#takeCurrent">takeCurrent</a>().
55<p> The QGLayoutIterator implements the functionality of
56<a href="qlayoutiterator.html">QLayoutIterator</a>. Each subclass of <a href="qlayout.html">QLayout</a> needs a
57QGLayoutIterator subclass.
58<p>See also <a href="appearance.html">Widget Appearance and Style</a> and <a href="geomanagement.html">Layout Management</a>.
59
60<hr><h2>Member Function Documentation</h2>
61<h3 class=fn><a name="~QGLayoutIterator"></a>QGLayoutIterator::~QGLayoutIterator ()<tt> [virtual]</tt>
62</h3>
63Destroys the iterator
64
65<h3 class=fn><a href="qlayoutitem.html">QLayoutItem</a>&nbsp;* <a name="current"></a>QGLayoutIterator::current ()<tt> [pure virtual]</tt>
66</h3>
67
68<p> Implemented in subclasses to return the current item, or 0 if
69there is no current item.
70
71<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>.
72<h3 class=fn><a href="qlayoutitem.html">QLayoutItem</a>&nbsp;* <a name="next"></a>QGLayoutIterator::next ()<tt> [pure virtual]</tt>
73</h3>
74
75<p> Implemented in subclasses to move the iterator to the next item
76and return that item, or 0 if there is no next item.
77
78<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>.
79<h3 class=fn><a href="qlayoutitem.html">QLayoutItem</a>&nbsp;* <a name="takeCurrent"></a>QGLayoutIterator::takeCurrent ()<tt> [pure virtual]</tt>
80</h3>
81
82<p> Implemented in subclasses. The function must remove the current
83item from the layout without deleting it, move the iterator to the
84next item and return the removed item, or 0 if no item was
85removed.
86
87<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>.
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