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<td align="right" valign="top" width="230"><img src="images/trolltech-logo.png" align="right" width="203" height="32" border="0" /></td></tr></table><h1 align="center">Q3PointArray Class Reference</h1>

<pre>#include <Q3PointArray></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 the <a href="porting4.html">Porting Guide</a> for more information.</p>

<p>Part of the <a href="qt3support.html">Qt3Support</a> module.</p>

<p>Inherits <a href="qpolygon.html">QPolygon</a>.</p>

<ul>

<li><a href="q3pointarray-members.html">List of all members, including inherited members</a></li>

</ul>

<h3>Public Functions</h3>

<ul>

<li><div class="fn"/><b><a href="q3pointarray.html#Q3PointArray">Q3PointArray</a></b> ()</li>

<li><div class="fn"/><b><a href="q3pointarray.html#Q3PointArray-2">Q3PointArray</a></b> ( const QRect & <i>r</i>, bool <i>closed</i> = false )</li>

<li><div class="fn"/><b><a href="q3pointarray.html#Q3PointArray-3">Q3PointArray</a></b> ( const QPolygon & <i>other</i> )</li>

<li><div class="fn"/>Q3PointArray <b><a href="q3pointarray.html#copy">copy</a></b> () const</li>

<li><div class="fn"/>Q3PointArray <b><a href="q3pointarray.html#cubicBezier">cubicBezier</a></b> () const</li>

<li><div class="fn"/>bool <b><a href="q3pointarray.html#isNull">isNull</a></b> ()</li>

<li><div class="fn"/>void <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> )</li>

<li><div class="fn"/>void <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 & <i>xf</i> )</li>

<li><div class="fn"/>void <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> )</li>

</ul>

<ul>

<li><div class="fn"/>12 public functions inherited from <a href="qpolygon.html#public-functions">QPolygon</a></li>

<li><div class="fn"/>62 public functions inherited from <a href="qvector.html#public-functions">QVector</a></li>

</ul>

<h3>Additional Inherited Members</h3>

<ul>

<li><div class="fn"/>2 static public members inherited from <a href="qvector.html#static-public-members">QVector</a></li>

</ul>

<hr />

<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>

<hr />

<h2>Member Function Documentation</h2>

<h3 class="fn"><a name="Q3PointArray"></a>Q3PointArray::Q3PointArray ()</h3>

<p>Constructs an empty <a href="q3pointarray.html">Q3PointArray</a>.</p>

<h3 class="fn"><a name="Q3PointArray-2"></a>Q3PointArray::Q3PointArray ( const <a href="qrect.html">QRect</a> & <i>r</i>, bool <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>

<h3 class="fn"><a name="Q3PointArray-3"></a>Q3PointArray::Q3PointArray ( const <a href="qpolygon.html">QPolygon</a> & <i>other</i> )</h3>

<p>Constructs a copy of <i>other</i>.</p>

<h3 class="fn"><a name="copy"></a>Q3PointArray Q3PointArray::copy () const</h3>

<p>Returns a copy of this <a href="q3pointarray.html">Q3PointArray</a>.</p>

<h3 class="fn"><a name="cubicBezier"></a>Q3PointArray Q3PointArray::cubicBezier () const</h3>

<p>Returns the Bezier points for the four control points in this array.</p>

<h3 class="fn"><a name="isNull"></a>bool Q3PointArray::isNull ()</h3>

<p>Same as <a href="qvector.html#isEmpty">isEmpty</a>().</p>

<h3 class="fn"><a name="makeArc"></a>void Q3PointArray::makeArc ( int <i>x</i>, int <i>y</i>, int <i>w</i>, int <i>h</i>, int <i>a1</i>, int <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">QMatrix</a> parameter).</p>

<p>Angles are specified in 16ths of a degree, i.e. 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>

<h3 class="fn"><a name="makeArc-2"></a>void Q3PointArray::makeArc ( 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 <a href="qmatrix.html">QMatrix</a> & <i>xf</i> )</h3>

<p>This is an overloaded member function, provided for convenience. It behaves essentially like the above 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. 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>

<h3 class="fn"><a name="makeEllipse"></a>void Q3PointArray::makeEllipse ( int <i>x</i>, int <i>y</i>, int <i>w</i>, int <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>

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