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| author | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-07-10 15:24:15 -0500 |
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| committer | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-07-10 15:24:15 -0500 |
| commit | bd0f3345a938b35ce6a12f6150373b0955b8dd12 (patch) | |
| tree | 7a520322212d48ebcb9fbe1087e7fca28b76185c /doc/html/qlayoutiterator.html | |
| download | qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.tar.gz qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.zip | |
Add Qt3 development HEAD version
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| -rw-r--r-- | doc/html/qlayoutiterator.html | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/doc/html/qlayoutiterator.html b/doc/html/qlayoutiterator.html new file mode 100644 index 0000000..18fd1ac --- /dev/null +++ b/doc/html/qlayoutiterator.html @@ -0,0 +1,158 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> +<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/kernel/qabstractlayout.cpp:1569 --> +<html> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> +<title>QLayoutIterator Class</title> +<style type="text/css"><!-- +fn { margin-left: 1cm; text-indent: -1cm; } +a:link { color: #004faf; text-decoration: none } +a:visited { color: #672967; text-decoration: none } +body { background: #ffffff; color: black; } +--></style> +</head> +<body> + +<table border="0" cellpadding="0" cellspacing="0" width="100%"> +<tr bgcolor="#E5E5E5"> +<td valign=center> + <a href="index.html"> +<font color="#004faf">Home</font></a> + | <a href="classes.html"> +<font color="#004faf">All Classes</font></a> + | <a href="mainclasses.html"> +<font color="#004faf">Main Classes</font></a> + | <a href="annotated.html"> +<font color="#004faf">Annotated</font></a> + | <a href="groups.html"> +<font color="#004faf">Grouped Classes</font></a> + | <a href="functions.html"> +<font color="#004faf">Functions</font></a> +</td> +<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QLayoutIterator Class Reference</h1> + +<p>The QLayoutIterator class provides iterators over QLayoutItem. +<a href="#details">More...</a> +<p><tt>#include <<a href="qlayout-h.html">qlayout.h</a>></tt> +<p><a href="qlayoutiterator-members.html">List of all member functions.</a> +<h2>Public Members</h2> +<ul> +<li class=fn><a href="#QLayoutIterator"><b>QLayoutIterator</b></a> ( QGLayoutIterator * gi )</li> +<li class=fn><a href="#QLayoutIterator-2"><b>QLayoutIterator</b></a> ( const QLayoutIterator & i )</li> +<li class=fn><a href="#~QLayoutIterator"><b>~QLayoutIterator</b></a> ()</li> +<li class=fn>QLayoutIterator & <a href="#operator-eq"><b>operator=</b></a> ( const QLayoutIterator & i )</li> +<li class=fn>QLayoutItem * <a href="#operator++"><b>operator++</b></a> ()</li> +<li class=fn>QLayoutItem * <a href="#current"><b>current</b></a> ()</li> +<li class=fn>QLayoutItem * <a href="#takeCurrent"><b>takeCurrent</b></a> ()</li> +<li class=fn>void <a href="#deleteCurrent"><b>deleteCurrent</b></a> ()</li> +</ul> +<hr><a name="details"></a><h2>Detailed Description</h2> + + +The QLayoutIterator class provides iterators over <a href="qlayoutitem.html">QLayoutItem</a>. +<p> + +<p> Use <a href="qlayoutitem.html#iterator">QLayoutItem::iterator</a>() to create an iterator over a layout. +<p> QLayoutIterator uses <em>explicit</em> sharing with a reference count. +If an iterator is copied and one of the copies is modified, both +iterators will be modified. +<p> A QLayoutIterator is not protected against changes in its layout. If +the layout is modified or deleted the iterator will become invalid. +It is not possible to test for validity. It is safe to delete an +invalid layout; any other access may lead to an illegal memory +reference and the abnormal termination of the program. +<p> Calling <a href="#takeCurrent">takeCurrent</a>() or <a href="#deleteCurrent">deleteCurrent</a>() leaves the iterator in a +valid state, but may invalidate any other iterators that access the +same layout. +<p> The following code will draw a rectangle for each layout item in +the layout structure of the widget. +<pre> + static void paintLayout( <a href="qpainter.html">QPainter</a> *p, QLayoutItem *lay ) + { + QLayoutIterator it = lay->iterator(); + <a href="qlayoutitem.html">QLayoutItem</a> *child; + while ( (child = it.<a href="#current">current</a>()) != 0 ) { + paintLayout( p, child ); + ++it; + } + p-><a href="qpainter.html#drawRect">drawRect</a>( lay->geometry() ); + } + void ExampleWidget::paintEvent( <a href="qpaintevent.html">QPaintEvent</a> * ) + { + <a href="qpainter.html">QPainter</a> p( this ); + if ( layout() ) + paintLayout( &p, layout() ); + } + </pre> + +<p> All the functionality of QLayoutIterator is implemented by +subclasses of <a href="qglayoutiterator.html">QGLayoutIterator</a>. QLayoutIterator itself is not +designed to be subclassed. +<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="QLayoutIterator"></a>QLayoutIterator::QLayoutIterator ( <a href="qglayoutiterator.html">QGLayoutIterator</a> * gi ) +</h3> + +<p> Constructs an iterator based on <em>gi</em>. The constructed iterator +takes ownership of <em>gi</em> and will delete it. +<p> This constructor is provided for layout implementors. Application +programmers should use <a href="qlayoutitem.html#iterator">QLayoutItem::iterator</a>() to create an +iterator over a layout. + +<h3 class=fn><a name="QLayoutIterator-2"></a>QLayoutIterator::QLayoutIterator ( const <a href="qlayoutiterator.html">QLayoutIterator</a> & i ) +</h3> + +<p> Creates a <a href="shclass.html#shallow-copy">shallow copy</a> of <em>i</em>, i.e. if the copy is modified, then +the original will also be modified. + +<h3 class=fn><a name="~QLayoutIterator"></a>QLayoutIterator::~QLayoutIterator () +</h3> + +<p> Destroys the iterator. + +<h3 class=fn><a href="qlayoutitem.html">QLayoutItem</a> * <a name="current"></a>QLayoutIterator::current () +</h3> + +<p> Returns the current item, or 0 if there is no current item. + +<h3 class=fn>void <a name="deleteCurrent"></a>QLayoutIterator::deleteCurrent () +</h3> + +<p> Removes and deletes the current child item from the layout and +moves the iterator to the next item. This iterator will still be +valid, but any other iterator over the same layout may become +invalid. + +<h3 class=fn><a href="qlayoutitem.html">QLayoutItem</a> * <a name="operator++"></a>QLayoutIterator::operator++ () +</h3> + +<p> Moves the iterator to the next child item and returns that item, +or 0 if there is no such item. + +<h3 class=fn><a href="qlayoutiterator.html">QLayoutIterator</a> & <a name="operator-eq"></a>QLayoutIterator::operator= ( const <a href="qlayoutiterator.html">QLayoutIterator</a> & i ) +</h3> + +<p> Assigns <em>i</em> to this iterator and returns a reference to this +iterator. + +<h3 class=fn><a href="qlayoutitem.html">QLayoutItem</a> * <a name="takeCurrent"></a>QLayoutIterator::takeCurrent () +</h3> + +<p> Removes the current child item from the layout without deleting +it, and moves the iterator to the next item. Returns the removed +item, or 0 if there was no item to be removed. This iterator will +still be valid, but any other iterator over the same layout may +become invalid. + +<!-- eof --> +<hr><p> +This file is part of the <a href="index.html">Qt toolkit</a>. +Copyright © 1995-2007 +<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center> +<table width=100% cellspacing=0 border=0><tr> +<td>Copyright © 2007 +<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a> +<td align=right><div align=right>Qt 3.3.8</div> +</table></div></address></body> +</html> |