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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>TQListViewItemIterator Class Reference</h1>
<p>The TQListViewItemIterator class provides an iterator for collections of TQListViewItems.
<a href="#details">More...</a>
<p><tt>#include <<a href="qlistview-h.html">ntqlistview.h</a>></tt>
<p><a href="qlistviewitemiterator-members.html">List of all member functions.</a>
<h2>Public Members</h2>
<ul>
<li class=fn>enum <a href="#IteratorFlag-enum"><b>IteratorFlag</b></a> { Visible = 0x00000001, Invisible = 0x00000002, Selected = 0x00000004, Unselected = 0x00000008, Selectable = 0x00000010, NotSelectable = 0x00000020, DragEnabled = 0x00000040, DragDisabled = 0x00000080, DropEnabled = 0x00000100, DropDisabled = 0x00000200, Expandable = 0x00000400, NotExpandable = 0x00000800, Checked = 0x00001000, NotChecked = 0x00002000 }</li>
<li class=fn><a href="#TQListViewItemIterator"><b>TQListViewItemIterator</b></a> ()</li>
<li class=fn><a href="#TQListViewItemIterator-2"><b>TQListViewItemIterator</b></a> ( TQListViewItem * item )</li>
<li class=fn><a href="#TQListViewItemIterator-3"><b>TQListViewItemIterator</b></a> ( TQListViewItem * item, int iteratorFlags )</li>
<li class=fn><a href="#TQListViewItemIterator-4"><b>TQListViewItemIterator</b></a> ( const TQListViewItemIterator & it )</li>
<li class=fn><a href="#TQListViewItemIterator-5"><b>TQListViewItemIterator</b></a> ( TQListView * lv )</li>
<li class=fn><a href="#TQListViewItemIterator-6"><b>TQListViewItemIterator</b></a> ( TQListView * lv, int iteratorFlags )</li>
<li class=fn>TQListViewItemIterator & <a href="#operator-eq"><b>operator=</b></a> ( const TQListViewItemIterator & it )</li>
<li class=fn><a href="#~TQListViewItemIterator"><b>~TQListViewItemIterator</b></a> ()</li>
<li class=fn>TQListViewItemIterator & <a href="#operator++"><b>operator++</b></a> ()</li>
<li class=fn>const TQListViewItemIterator <a href="#operator++-2"><b>operator++</b></a> ( int )</li>
<li class=fn>TQListViewItemIterator & <a href="#operator+-eq"><b>operator+=</b></a> ( int j )</li>
<li class=fn>TQListViewItemIterator & <a href="#operator--"><b>operator--</b></a> ()</li>
<li class=fn>const TQListViewItemIterator <a href="#operator---2"><b>operator--</b></a> ( int )</li>
<li class=fn>TQListViewItemIterator & <a href="#operator--eq"><b>operator-=</b></a> ( int j )</li>
<li class=fn>TQListViewItem * <a href="#operator*"><b>operator*</b></a> ()</li>
<li class=fn>TQListViewItem * <a href="#current"><b>current</b></a> () const</li>
</ul>
<hr><a name="details"></a><h2>Detailed Description</h2>
The TQListViewItemIterator class provides an iterator for collections of TQListViewItems.
<p>
<p> Construct an instance of a TQListViewItemIterator, with either a
<a href="ntqlistview.html">TQListView</a>* or a <a href="qlistviewitem.html">TQListViewItem</a>* as argument, to operate on the tree
of TQListViewItems, starting from the argument.
<p> A TQListViewItemIterator iterates over all the items from its
starting point. This means that it always makes the first child of
the current item the new current item. If there is no child, the
next sibling becomes the new current item; and if there is no next
sibling, the next sibling of the parent becomes current.
<p> The following example creates a list of all the items that have
been selected by the user, storing pointers to the items in a
TQPtrList:
<pre>
<a href="ntqptrlist.html">TQPtrList</a><TQListViewItem> lst;
TQListViewItemIterator it( myListView );
while ( it.<a href="#current">current</a>() ) {
if ( it.<a href="#current">current</a>()->isSelected() )
lst.<a href="ntqptrlist.html#append">append</a>( it.<a href="#current">current</a>() );
++it;
}
</pre>
<p> An alternative approach is to use an <a href="#IteratorFlag-enum">IteratorFlag</a>:
<pre>
<a href="ntqptrlist.html">TQPtrList</a><TQListViewItem> lst;
TQListViewItemIterator it( myListView, TQListViewItemIterator::<a href="#IteratorFlag-enum">Selected</a> );
while ( it.<a href="#current">current</a>() ) {
lst.<a href="ntqptrlist.html#append">append</a>( it.<a href="#current">current</a>() );
++it;
}
</pre>
<p> A TQListViewItemIterator provides a convenient and easy way to
traverse a hierarchical <a href="ntqlistview.html">TQListView</a>.
<p> Multiple TQListViewItemIterators can operate on the tree of
TQListViewItems. A TQListView knows about all iterators operating on
its TQListViewItems. So when a <a href="qlistviewitem.html">TQListViewItem</a> gets removed all
iterators that point to this item are updated and point to the
following item if possible, otherwise to a valid item before the
current one or to 0. Note however that deleting the parent item of
an item that an iterator points to is not safe.
<p> <p>See also <a href="ntqlistview.html">TQListView</a>, <a href="qlistviewitem.html">TQListViewItem</a>, and <a href="advanced.html">Advanced Widgets</a>.
<hr><h2>Member Type Documentation</h2>
<h3 class=fn><a name="IteratorFlag-enum"></a>TQListViewItemIterator::IteratorFlag</h3>
<p> These flags can be passed to a TQListViewItemIterator constructor
(OR-ed together if more than one is used), so that the iterator
will only iterate over items that match the given flags.
<ul>
<li><tt>TQListViewItemIterator::Visible</tt>
<li><tt>TQListViewItemIterator::Invisible</tt>
<li><tt>TQListViewItemIterator::Selected</tt>
<li><tt>TQListViewItemIterator::Unselected</tt>
<li><tt>TQListViewItemIterator::Selectable</tt>
<li><tt>TQListViewItemIterator::NotSelectable</tt>
<li><tt>TQListViewItemIterator::DragEnabled</tt>
<li><tt>TQListViewItemIterator::DragDisabled</tt>
<li><tt>TQListViewItemIterator::DropEnabled</tt>
<li><tt>TQListViewItemIterator::DropDisabled</tt>
<li><tt>TQListViewItemIterator::Expandable</tt>
<li><tt>TQListViewItemIterator::NotExpandable</tt>
<li><tt>TQListViewItemIterator::Checked</tt>
<li><tt>TQListViewItemIterator::NotChecked</tt>
</ul>
<hr><h2>Member Function Documentation</h2>
<h3 class=fn><a name="TQListViewItemIterator"></a>TQListViewItemIterator::TQListViewItemIterator ()
</h3>
Constructs an empty iterator.
<h3 class=fn><a name="TQListViewItemIterator-2"></a>TQListViewItemIterator::TQListViewItemIterator ( <a href="qlistviewitem.html">TQListViewItem</a> * item )
</h3>
Constructs an iterator for the <a href="ntqlistview.html">TQListView</a> that contains the <em>item</em>. The current iterator item is set to point to the <em>item</em>.
<h3 class=fn><a name="TQListViewItemIterator-3"></a>TQListViewItemIterator::TQListViewItemIterator ( <a href="qlistviewitem.html">TQListViewItem</a> * item, int iteratorFlags )
</h3>
Constructs an iterator for the <a href="ntqlistview.html">TQListView</a> that contains the <em>item</em>
using the flags <em>iteratorFlags</em>. The current iterator item is set
to point to <em>item</em> or the next matching item if <em>item</em> doesn't
match the flags.
<p> <p>See also <a href="#IteratorFlag-enum">TQListViewItemIterator::IteratorFlag</a>.
<h3 class=fn><a name="TQListViewItemIterator-4"></a>TQListViewItemIterator::TQListViewItemIterator ( const <a href="qlistviewitemiterator.html">TQListViewItemIterator</a> & it )
</h3>
Constructs an iterator for the same <a href="ntqlistview.html">TQListView</a> as <em>it</em>. The
current iterator item is set to point on the current item of <em>it</em>.
<h3 class=fn><a name="TQListViewItemIterator-5"></a>TQListViewItemIterator::TQListViewItemIterator ( <a href="ntqlistview.html">TQListView</a> * lv )
</h3>
Constructs an iterator for the <a href="ntqlistview.html">TQListView</a> <em>lv</em>. The current
iterator item is set to point on the first child (<a href="qlistviewitem.html">TQListViewItem</a>)
of <em>lv</em>.
<h3 class=fn><a name="TQListViewItemIterator-6"></a>TQListViewItemIterator::TQListViewItemIterator ( <a href="ntqlistview.html">TQListView</a> * lv, int iteratorFlags )
</h3>
Constructs an iterator for the <a href="ntqlistview.html">TQListView</a> <em>lv</em> with the flags <em>iteratorFlags</em>. The current iterator item is set to point on the
first child (<a href="qlistviewitem.html">TQListViewItem</a>) of <em>lv</em> that matches the flags.
<p> <p>See also <a href="#IteratorFlag-enum">TQListViewItemIterator::IteratorFlag</a>.
<h3 class=fn><a name="~TQListViewItemIterator"></a>TQListViewItemIterator::~TQListViewItemIterator ()
</h3>
Destroys the iterator.
<h3 class=fn><a href="qlistviewitem.html">TQListViewItem</a> * <a name="current"></a>TQListViewItemIterator::current () const
</h3>
Returns iterator's current item.
<p>Examples: <a href="addressbook-example.html#x597">addressbook/centralwidget.cpp</a>, <a href="checklists-example.html#x432">checklists/checklists.cpp</a>, and <a href="dirview-example.html#x1694">dirview/dirview.cpp</a>.
<h3 class=fn><a href="qlistviewitem.html">TQListViewItem</a> * <a name="operator*"></a>TQListViewItemIterator::operator* ()
</h3>
Dereference operator. Returns a reference to the current item. The
same as <a href="#current">current</a>().
<h3 class=fn><a href="qlistviewitemiterator.html">TQListViewItemIterator</a> & <a name="operator++"></a>TQListViewItemIterator::operator++ ()
</h3>
Prefix ++. Makes the next item the new current item and returns
it. Returns 0 if the current item is the last item or the
<a href="ntqlistview.html">TQListView</a> is 0.
<h3 class=fn>const <a href="qlistviewitemiterator.html">TQListViewItemIterator</a> <a name="operator++-2"></a>TQListViewItemIterator::operator++ ( int )
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> Postfix ++. Makes the next item the new current item and returns
the item that <em>was</em> the current item.
<h3 class=fn><a href="qlistviewitemiterator.html">TQListViewItemIterator</a> & <a name="operator+-eq"></a>TQListViewItemIterator::operator+= ( int j )
</h3>
Sets the current item to the item <em>j</em> positions after the current
item. If that item is beyond the last item, the current item is
set to 0. Returns the current item.
<h3 class=fn><a href="qlistviewitemiterator.html">TQListViewItemIterator</a> & <a name="operator--"></a>TQListViewItemIterator::operator-- ()
</h3>
Prefix --. Makes the previous item the new current item and
returns it. Returns 0 if the current item is the first item or the
<a href="ntqlistview.html">TQListView</a> is 0.
<h3 class=fn>const <a href="qlistviewitemiterator.html">TQListViewItemIterator</a> <a name="operator---2"></a>TQListViewItemIterator::operator-- ( int )
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> Postfix --. Makes the previous item the new current item and
returns the item that <em>was</em> the current item.
<h3 class=fn><a href="qlistviewitemiterator.html">TQListViewItemIterator</a> & <a name="operator--eq"></a>TQListViewItemIterator::operator-= ( int j )
</h3>
Sets the current item to the item <em>j</em> positions before the
current item. If that item is before the first item, the current
item is set to 0. Returns the current item.
<h3 class=fn><a href="qlistviewitemiterator.html">TQListViewItemIterator</a> & <a name="operator-eq"></a>TQListViewItemIterator::operator= ( const <a href="qlistviewitemiterator.html">TQListViewItemIterator</a> & it )
</h3>
Assignment. Makes a copy of <em>it</em> and returns a reference to its
iterator.
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