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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<!-- q3pointarray.cpp -->
  <title>Qt 4.8: Q3PointArray Class Reference</title>
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    <a href="index.html" class="qtref"><span>Qt Reference Documentation</span></a>
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<h3><a name="toc">Contents</a></h3>
<ul>
<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
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<h1 class="title">Q3PointArray Class Reference</h1>
<pre class="cpp"> <span class="preprocessor">#include &lt;Q3PointArray&gt;</span></pre><p><b>This class is part of the Qt 3 support library.</b> It is provided to keep old source code working. We strongly advise against using it in new code. See <a href="porting4.html#qpointarray">Porting to Qt 4</a> for more information.</p>
<p><b>Inherits: </b><a href="qpolygon.html">QPolygon</a>.</p>
<ul>
<li><a href="q3pointarray-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="q3pointarray.html#Q3PointArray">Q3PointArray</a></b> ()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="q3pointarray.html#Q3PointArray-2">Q3PointArray</a></b> ( const QRect &amp; <i>r</i>, bool <i>closed</i> = false )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="q3pointarray.html#Q3PointArray-3">Q3PointArray</a></b> ( const QPolygon &amp; <i>other</i> )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> Q3PointArray </td><td class="memItemRight bottomAlign"><b><a href="q3pointarray.html#copy">copy</a></b> () const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> Q3PointArray </td><td class="memItemRight bottomAlign"><b><a href="q3pointarray.html#cubicBezier">cubicBezier</a></b> () const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="q3pointarray.html#isNull">isNull</a></b> ()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="q3pointarray.html#makeArc">makeArc</a></b> ( int <i>x</i>, int <i>y</i>, int <i>w</i>, int <i>h</i>, int <i>a1</i>, int <i>a2</i> )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="q3pointarray.html#makeArc-2">makeArc</a></b> ( int <i>x</i>, int <i>y</i>, int <i>w</i>, int <i>h</i>, int <i>a1</i>, int <i>a2</i>, const QMatrix &amp; <i>xf</i> )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="q3pointarray.html#makeEllipse">makeEllipse</a></b> ( int <i>x</i>, int <i>y</i>, int <i>w</i>, int <i>h</i> )</td></tr>
</table>
<ul>
<li class="fn">19 public functions inherited from <a href="qpolygon.html#public-functions">QPolygon</a></li>
<li class="fn">65 public functions inherited from <a href="qvector.html#public-functions">QVector</a></li>
</ul>
<h3>Additional Inherited Members</h3>
<ul>
<li class="fn">2 static public members inherited from <a href="qvector.html#static-public-members">QVector</a></li>
</ul>
<a name="details"></a>
<!-- $$$Q3PointArray-description -->
<div class="descr">
<h2>Detailed Description</h2>
<p>The Q3PointArray class provides an array of points.</p>
<p>Q3PointArray is a <a href="qpolygon.html">QPolygon</a> subclass that provides functions to make it more source compatible with the <tt>QPointArray</tt> class in Qt 3.</p>
<p>In Qt 4, we recommend that you use <a href="qpainterpath.html">QPainterPath</a> for representing arcs, ellipses, and Bezier curves, rather than <a href="qpolygon.html">QPolygon</a>.</p>
</div>
<!-- @@@Q3PointArray -->
<div class="func">
<h2>Member Function Documentation</h2>
<!-- $$$Q3PointArray[overload1]$$$Q3PointArray -->
<h3 class="fn"><a name="Q3PointArray"></a>Q3PointArray::<span class="name">Q3PointArray</span> ()</h3>
<p>Constructs an empty <a href="q3pointarray.html" class="compat">Q3PointArray</a>.</p>
<!-- @@@Q3PointArray -->
<!-- $$$Q3PointArray$$$Q3PointArrayconstQRect&bool -->
<h3 class="fn"><a name="Q3PointArray-2"></a>Q3PointArray::<span class="name">Q3PointArray</span> ( const <span class="type"><a href="qrect.html">QRect</a></span> &amp; <i>r</i>, <span class="type">bool</span> <i>closed</i> = false )</h3>
<p>Constructs a point array from the rectangle <i>r</i>.</p>
<p>If <i>closed</i> is false, then the point array just contains the following four points of the rectangle ordered clockwise. The bottom-right point is located at (r.x() + r.width(), r.y() + r.height()).</p>
<!-- @@@Q3PointArray -->
<!-- $$$Q3PointArray$$$Q3PointArrayconstQPolygon& -->
<h3 class="fn"><a name="Q3PointArray-3"></a>Q3PointArray::<span class="name">Q3PointArray</span> ( const <span class="type"><a href="qpolygon.html">QPolygon</a></span> &amp; <i>other</i> )</h3>
<p>Constructs a copy of <i>other</i>.</p>
<!-- @@@Q3PointArray -->
<!-- $$$copy[overload1]$$$copy -->
<h3 class="fn"><a name="copy"></a><span class="type">Q3PointArray</span> Q3PointArray::<span class="name">copy</span> () const</h3>
<p>Returns a copy of this <a href="q3pointarray.html" class="compat">Q3PointArray</a>.</p>
<!-- @@@copy -->
<!-- $$$cubicBezier[overload1]$$$cubicBezier -->
<h3 class="fn"><a name="cubicBezier"></a><span class="type">Q3PointArray</span> Q3PointArray::<span class="name">cubicBezier</span> () const</h3>
<p>Returns the Bezier points for the four control points in this array.</p>
<!-- @@@cubicBezier -->
<!-- $$$isNull[overload1]$$$isNull -->
<h3 class="fn"><a name="isNull"></a><span class="type">bool</span> Q3PointArray::<span class="name">isNull</span> ()</h3>
<p>Returns <a href="qvector.html#isEmpty">isEmpty</a>(). Use <a href="qvector.html#isEmpty">isEmpty</a>() instead.</p>
<!-- @@@isNull -->
<!-- $$$makeArc[overload1]$$$makeArcintintintintintint -->
<h3 class="fn"><a name="makeArc"></a><span class="type">void</span> Q3PointArray::<span class="name">makeArc</span> ( <span class="type">int</span> <i>x</i>, <span class="type">int</span> <i>y</i>, <span class="type">int</span> <i>w</i>, <span class="type">int</span> <i>h</i>, <span class="type">int</span> <i>a1</i>, <span class="type">int</span> <i>a2</i> )</h3>
<p>Sets the points of the array to those describing an arc of an ellipse with size, width <i>w</i> by height <i>h</i>, and position (<i>x</i>, <i>y</i>), starting from angle <i>a1</i> and spanning by angle <i>a2</i>. The resulting array has sufficient resolution for pixel accuracy (see the overloaded function which takes an additional <a href="qmatrix.html" class="obsolete">QMatrix</a> parameter).</p>
<p>Angles are specified in 16ths of a degree, i.e&#x2e; a full circle equals 5760 (16*360). Positive values mean counter-clockwise, whereas negative values mean the clockwise direction. Zero degrees is at the 3 o'clock position.</p>
<!-- @@@makeArc -->
<!-- $$$makeArc$$$makeArcintintintintintintconstQMatrix& -->
<h3 class="fn"><a name="makeArc-2"></a><span class="type">void</span> Q3PointArray::<span class="name">makeArc</span> ( <span class="type">int</span> <i>x</i>, <span class="type">int</span> <i>y</i>, <span class="type">int</span> <i>w</i>, <span class="type">int</span> <i>h</i>, <span class="type">int</span> <i>a1</i>, <span class="type">int</span> <i>a2</i>, const <span class="type"><a href="qmatrix.html">QMatrix</a></span> &amp; <i>xf</i> )</h3>
<p>This is an overloaded function.</p>
<p>Sets the points of the array to those describing an arc of an ellipse with width <i>w</i> and height <i>h</i> and position (<i>x</i>, <i>y</i>), starting from angle <i>a1</i>, and spanning angle by <i>a2</i>, and transformed by the matrix <i>xf</i>. The resulting array has sufficient resolution for pixel accuracy.</p>
<p>Angles are specified in 16ths of a degree, i.e&#x2e; a full circle equals 5760 (16 * 360). Positive values mean counter-clockwise, whereas negative values mean the clockwise direction. Zero degrees is at the 3 o'clock position.</p>
<!-- @@@makeArc -->
<!-- $$$makeEllipse[overload1]$$$makeEllipseintintintint -->
<h3 class="fn"><a name="makeEllipse"></a><span class="type">void</span> Q3PointArray::<span class="name">makeEllipse</span> ( <span class="type">int</span> <i>x</i>, <span class="type">int</span> <i>y</i>, <span class="type">int</span> <i>w</i>, <span class="type">int</span> <i>h</i> )</h3>
<p>Sets the points of the array to those describing an ellipse with size, width <i>w</i> by height <i>h</i>, and position (<i>x</i>, <i>y</i>).</p>
<p>The returned array has sufficient resolution for use as pixels.</p>
<!-- @@@makeEllipse -->
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