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tqt3/doc/html/qglayoutiterator.html

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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>TQGLayoutIterator Class Reference</h1>
<p>The TQGLayoutIterator class is an abstract base class of internal layout iterators.
<a href="#details">More...</a>
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<p><tt>#include &lt;<a href="qlayout-h.html">ntqlayout.h</a>&gt;</tt>
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<p><a href="qglayoutiterator-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
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the letters <a href="ntqgl.html">TQGL</a>...)
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<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
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<a href="qlayoutiterator.html">TQLayoutIterator</a>. Each subclass of <a href="ntqlayout.html">TQLayout</a> needs a
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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="qlayoutitem.html">TQLayoutItem</a>&nbsp;* <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="qlayoutitem.html">TQLayoutItem</a>&nbsp;* <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="qlayoutitem.html">TQLayoutItem</a>&nbsp;* <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>.
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