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<h1 class="title">QGraphicsLineItem Class Reference</h1>
<!-- $$$QGraphicsLineItem-brief -->
<p>The QGraphicsLineItem class provides a line item that you can add to a <a href="qgraphicsscene.html">QGraphicsScene</a>. <a href="#details">More...</a></p>
<!-- @@@QGraphicsLineItem -->
<pre class="cpp"> <span class="preprocessor">#include &lt;QGraphicsLineItem&gt;</span></pre><p><b>Inherits: </b><a href="qgraphicsitem.html">QGraphicsItem</a>.</p>
<p>This class was introduced in Qt 4.2.</p>
<ul>
<li><a href="qgraphicslineitem-members.html">List of all members, including inherited members</a></li>
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<a name="public-functions"></a>
<h2>Public Functions</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qgraphicslineitem.html#QGraphicsLineItem">QGraphicsLineItem</a></b> ( QGraphicsItem * <i>parent</i> = 0 )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qgraphicslineitem.html#QGraphicsLineItem-2">QGraphicsLineItem</a></b> ( const QLineF &amp; <i>line</i>, QGraphicsItem * <i>parent</i> = 0 )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qgraphicslineitem.html#QGraphicsLineItem-3">QGraphicsLineItem</a></b> ( qreal <i>x1</i>, qreal <i>y1</i>, qreal <i>x2</i>, qreal <i>y2</i>, QGraphicsItem * <i>parent</i> = 0 )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qgraphicslineitem.html#dtor.QGraphicsLineItem">~QGraphicsLineItem</a></b> ()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QLineF </td><td class="memItemRight bottomAlign"><b><a href="qgraphicslineitem.html#line">line</a></b> () const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QPen </td><td class="memItemRight bottomAlign"><b><a href="qgraphicslineitem.html#pen">pen</a></b> () const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qgraphicslineitem.html#setLine">setLine</a></b> ( const QLineF &amp; <i>line</i> )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qgraphicslineitem.html#setLine-2">setLine</a></b> ( qreal <i>x1</i>, qreal <i>y1</i>, qreal <i>x2</i>, qreal <i>y2</i> )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qgraphicslineitem.html#setPen">setPen</a></b> ( const QPen &amp; <i>pen</i> )</td></tr>
</table>
<a name="reimplemented-public-functions"></a>
<h2>Reimplemented Public Functions</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> virtual QRectF </td><td class="memItemRight bottomAlign"><b><a href="qgraphicslineitem.html#boundingRect">boundingRect</a></b> () const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual bool </td><td class="memItemRight bottomAlign"><b><a href="qgraphicslineitem.html#contains">contains</a></b> ( const QPointF &amp; <i>point</i> ) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual bool </td><td class="memItemRight bottomAlign"><b><a href="qgraphicslineitem.html#isObscuredBy">isObscuredBy</a></b> ( const QGraphicsItem * <i>item</i> ) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual QPainterPath </td><td class="memItemRight bottomAlign"><b><a href="qgraphicslineitem.html#opaqueArea">opaqueArea</a></b> () const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qgraphicslineitem.html#paint">paint</a></b> ( QPainter * <i>painter</i>, const QStyleOptionGraphicsItem * <i>option</i>, QWidget * <i>widget</i> = 0 )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual QPainterPath </td><td class="memItemRight bottomAlign"><b><a href="qgraphicslineitem.html#shape">shape</a></b> () const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual int </td><td class="memItemRight bottomAlign"><b><a href="qgraphicslineitem.html#type">type</a></b> () const</td></tr>
</table>
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<li class="fn">177 public functions inherited from <a href="qgraphicsitem.html#public-functions">QGraphicsItem</a></li>
</ul>
<h3>Additional Inherited Members</h3>
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<li class="fn">2 static public members inherited from <a href="qgraphicsitem.html#static-public-members">QGraphicsItem</a></li>
<li class="fn">24 protected functions inherited from <a href="qgraphicsitem.html#protected-functions">QGraphicsItem</a></li>
</ul>
<a name="details"></a>
<!-- $$$QGraphicsLineItem-description -->
<div class="descr">
<h2>Detailed Description</h2>
<p>The QGraphicsLineItem class provides a line item that you can add to a <a href="qgraphicsscene.html">QGraphicsScene</a>.</p>
<p>To set the item's line, pass a <a href="qlinef.html">QLineF</a> to QGraphicsLineItem's constructor, or call the <a href="qgraphicslineitem.html#setLine">setLine</a>() function. The <a href="qgraphicslineitem.html#line">line</a>() function returns the current line. By default the line is black with a width of 0, but you can change this by calling <a href="qgraphicslineitem.html#setPen">setPen</a>().</p>
<p class="centerAlign"><img src="images/graphicsview-lineitem.png" alt="" /></p><p>QGraphicsLineItem uses the line and the pen width to provide a reasonable implementation of <a href="qgraphicslineitem.html#boundingRect">boundingRect</a>(), <a href="qgraphicslineitem.html#shape">shape</a>(), and <a href="qgraphicslineitem.html#contains">contains</a>(). The <a href="qgraphicslineitem.html#paint">paint</a>() function draws the line using the item's associated pen.</p>
</div>
<p><b>See also </b><a href="qgraphicspathitem.html">QGraphicsPathItem</a>, <a href="qgraphicsrectitem.html">QGraphicsRectItem</a>, <a href="qgraphicsellipseitem.html">QGraphicsEllipseItem</a>, <a href="qgraphicstextitem.html">QGraphicsTextItem</a>, <a href="qgraphicspolygonitem.html">QGraphicsPolygonItem</a>, <a href="qgraphicspixmapitem.html">QGraphicsPixmapItem</a>, and <a href="graphicsview.html">Graphics View Framework</a>.</p>
<!-- @@@QGraphicsLineItem -->
<div class="func">
<h2>Member Function Documentation</h2>
<!-- $$$QGraphicsLineItem[overload1]$$$QGraphicsLineItemQGraphicsItem* -->
<h3 class="fn"><a name="QGraphicsLineItem"></a>QGraphicsLineItem::<span class="name">QGraphicsLineItem</span> ( <span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span> * <i>parent</i> = 0 )</h3>
<p>Constructs a <a href="qgraphicslineitem.html">QGraphicsLineItem</a>. <i>parent</i> is passed to <a href="qgraphicsitem.html">QGraphicsItem</a>'s constructor.</p>
<p><b>See also </b><a href="qgraphicsscene.html#addItem">QGraphicsScene::addItem</a>().</p>
<!-- @@@QGraphicsLineItem -->
<!-- $$$QGraphicsLineItem$$$QGraphicsLineItemconstQLineF&QGraphicsItem* -->
<h3 class="fn"><a name="QGraphicsLineItem-2"></a>QGraphicsLineItem::<span class="name">QGraphicsLineItem</span> ( const <span class="type"><a href="qlinef.html">QLineF</a></span> &amp; <i>line</i>, <span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span> * <i>parent</i> = 0 )</h3>
<p>Constructs a <a href="qgraphicslineitem.html">QGraphicsLineItem</a>, using <i>line</i> as the default line. <i>parent</i> is passed to <a href="qgraphicsitem.html">QGraphicsItem</a>'s constructor.</p>
<p><b>See also </b><a href="qgraphicsscene.html#addItem">QGraphicsScene::addItem</a>().</p>
<!-- @@@QGraphicsLineItem -->
<!-- $$$QGraphicsLineItem$$$QGraphicsLineItemqrealqrealqrealqrealQGraphicsItem* -->
<h3 class="fn"><a name="QGraphicsLineItem-3"></a>QGraphicsLineItem::<span class="name">QGraphicsLineItem</span> ( <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <i>x1</i>, <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <i>y1</i>, <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <i>x2</i>, <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <i>y2</i>, <span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span> * <i>parent</i> = 0 )</h3>
<p>Constructs a <a href="qgraphicslineitem.html">QGraphicsLineItem</a>, using the line between (<i>x1</i>, <i>y1</i>) and (<i>x2</i>, <i>y2</i>) as the default line. <i>parent</i> is passed to <a href="qgraphicsitem.html">QGraphicsItem</a>'s constructor.</p>
<p><b>See also </b><a href="qgraphicsscene.html#addItem">QGraphicsScene::addItem</a>().</p>
<!-- @@@QGraphicsLineItem -->
<!-- $$$~QGraphicsLineItem[overload1]$$$~QGraphicsLineItem -->
<h3 class="fn"><a name="dtor.QGraphicsLineItem"></a>QGraphicsLineItem::<span class="name">~QGraphicsLineItem</span> ()</h3>
<p>Destroys the <a href="qgraphicslineitem.html">QGraphicsLineItem</a>.</p>
<!-- @@@~QGraphicsLineItem -->
<!-- $$$boundingRect[overload1]$$$boundingRect -->
<h3 class="fn"><a name="boundingRect"></a><span class="type"><a href="qrectf.html">QRectF</a></span> QGraphicsLineItem::<span class="name">boundingRect</span> () const<tt> [virtual]</tt></h3>
<p>Reimplemented from <a href="qgraphicsitem.html#boundingRect">QGraphicsItem::boundingRect</a>().</p>
<!-- @@@boundingRect -->
<!-- $$$contains[overload1]$$$containsconstQPointF& -->
<h3 class="fn"><a name="contains"></a><span class="type">bool</span> QGraphicsLineItem::<span class="name">contains</span> ( const <span class="type"><a href="qpointf.html">QPointF</a></span> &amp; <i>point</i> ) const<tt> [virtual]</tt></h3>
<p>Reimplemented from <a href="qgraphicsitem.html#contains">QGraphicsItem::contains</a>().</p>
<!-- @@@contains -->
<!-- $$$isObscuredBy[overload1]$$$isObscuredByconstQGraphicsItem* -->
<h3 class="fn"><a name="isObscuredBy"></a><span class="type">bool</span> QGraphicsLineItem::<span class="name">isObscuredBy</span> ( const <span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span> * <i>item</i> ) const<tt> [virtual]</tt></h3>
<p>Reimplemented from <a href="qgraphicsitem.html#isObscuredBy">QGraphicsItem::isObscuredBy</a>().</p>
<!-- @@@isObscuredBy -->
<!-- $$$line[overload1]$$$line -->
<h3 class="fn"><a name="line"></a><span class="type"><a href="qlinef.html">QLineF</a></span> QGraphicsLineItem::<span class="name">line</span> () const</h3>
<p>Returns the item's line, or a null line if no line has been set.</p>
<p><b>See also </b><a href="qgraphicslineitem.html#setLine">setLine</a>().</p>
<!-- @@@line -->
<!-- $$$opaqueArea[overload1]$$$opaqueArea -->
<h3 class="fn"><a name="opaqueArea"></a><span class="type"><a href="qpainterpath.html">QPainterPath</a></span> QGraphicsLineItem::<span class="name">opaqueArea</span> () const<tt> [virtual]</tt></h3>
<p>Reimplemented from <a href="qgraphicsitem.html#opaqueArea">QGraphicsItem::opaqueArea</a>().</p>
<!-- @@@opaqueArea -->
<!-- $$$paint[overload1]$$$paintQPainter*constQStyleOptionGraphicsItem*QWidget* -->
<h3 class="fn"><a name="paint"></a><span class="type">void</span> QGraphicsLineItem::<span class="name">paint</span> ( <span class="type"><a href="qpainter.html">QPainter</a></span> * <i>painter</i>, const <span class="type"><a href="qstyleoptiongraphicsitem.html">QStyleOptionGraphicsItem</a></span> * <i>option</i>, <span class="type"><a href="qwidget.html">QWidget</a></span> * <i>widget</i> = 0 )<tt> [virtual]</tt></h3>
<p>Reimplemented from <a href="qgraphicsitem.html#paint">QGraphicsItem::paint</a>().</p>
<!-- @@@paint -->
<!-- $$$pen[overload1]$$$pen -->
<h3 class="fn"><a name="pen"></a><span class="type"><a href="qpen.html">QPen</a></span> QGraphicsLineItem::<span class="name">pen</span> () const</h3>
<p>Returns the item's pen, or a black solid 0-width pen if no pen has been set.</p>
<p><b>See also </b><a href="qgraphicslineitem.html#setPen">setPen</a>().</p>
<!-- @@@pen -->
<!-- $$$setLine[overload1]$$$setLineconstQLineF& -->
<h3 class="fn"><a name="setLine"></a><span class="type">void</span> QGraphicsLineItem::<span class="name">setLine</span> ( const <span class="type"><a href="qlinef.html">QLineF</a></span> &amp; <i>line</i> )</h3>
<p>Sets the item's line to be the given <i>line</i>.</p>
<p><b>See also </b><a href="qgraphicslineitem.html#line">line</a>().</p>
<!-- @@@setLine -->
<!-- $$$setLine$$$setLineqrealqrealqrealqreal -->
<h3 class="fn"><a name="setLine-2"></a><span class="type">void</span> QGraphicsLineItem::<span class="name">setLine</span> ( <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <i>x1</i>, <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <i>y1</i>, <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <i>x2</i>, <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <i>y2</i> )</h3>
<p>This is an overloaded function.</p>
<p>Sets the item's line to be the line between (<i>x1</i>, <i>y1</i>) and (<i>x2</i>, <i>y2</i>).</p>
<p>This is the same as calling <tt>setLine(QLineF(x1, y1, x2, y2))</tt>.</p>
<!-- @@@setLine -->
<!-- $$$setPen[overload1]$$$setPenconstQPen& -->
<h3 class="fn"><a name="setPen"></a><span class="type">void</span> QGraphicsLineItem::<span class="name">setPen</span> ( const <span class="type"><a href="qpen.html">QPen</a></span> &amp; <i>pen</i> )</h3>
<p>Sets the item's pen to <i>pen</i>. If no pen is set, the line will be painted using a black solid 0-width pen.</p>
<p><b>See also </b><a href="qgraphicslineitem.html#pen">pen</a>().</p>
<!-- @@@setPen -->
<!-- $$$shape[overload1]$$$shape -->
<h3 class="fn"><a name="shape"></a><span class="type"><a href="qpainterpath.html">QPainterPath</a></span> QGraphicsLineItem::<span class="name">shape</span> () const<tt> [virtual]</tt></h3>
<p>Reimplemented from <a href="qgraphicsitem.html#shape">QGraphicsItem::shape</a>().</p>
<!-- @@@shape -->
<!-- $$$type[overload1]$$$type -->
<h3 class="fn"><a name="type"></a><span class="type">int</span> QGraphicsLineItem::<span class="name">type</span> () const<tt> [virtual]</tt></h3>
<p>Reimplemented from <a href="qgraphicsitem.html#type">QGraphicsItem::type</a>().</p>
<!-- @@@type -->
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