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<html><head><title>QPolygonF Class Reference</title><style>h3.fn,span.fn { margin-left: 1cm; text-indent: -1cm }
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</style></head><body><table border="0" cellpadding="0" cellspacing="0" width="100%"><tr /><td align="left" valign="top" width="32"><img align="left" border="0" height="32" src="images/rb-logo.png" width="32" /></td><td width="1">  </td><td class="postheader" valign="center"><a href="../pyqt4ref.html"><font color="#004faf">Home</font></a> · <a href="classes.html"><font color="#004faf">All Classes</font></a> · <a href="modules.html"><font color="#004faf">Modules</font></a></td></table><h1 align="center">QPolygonF Class Reference<br /><sup><sup>[<a href="qtgui.html">QtGui</a> module]</sup></sup></h1><p>The QPolygonF class provides a vector of points using floating point precision. <a href="#details">More...</a></p>
<h3>Methods</h3><ul><li><div class="fn" /><b><a href="qpolygonf.html#QPolygonF">__init__</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qpolygonf.html#QPolygonF-2">__init__</a></b> (<i>self</i>, QPolygonF)</li><li><div class="fn" /><b><a href="qpolygonf.html#QPolygonF-3">__init__</a></b> (<i>self</i>, list-of-QPointF)</li><li><div class="fn" /><b><a href="qpolygonf.html#QPolygonF-4">__init__</a></b> (<i>self</i>, QRectF)</li><li><div class="fn" /><b><a href="qpolygonf.html#QPolygonF-5">__init__</a></b> (<i>self</i>, QPolygon)</li><li><div class="fn" /><b><a href="qpolygonf.html#QPolygonF-6">__init__</a></b> (<i>self</i>, int)</li><li><div class="fn" /><b><a href="qpolygonf.html#append">append</a></b> (<i>self</i>, QPointF <i>value</i>)</li><li><div class="fn" />QPointF <b><a href="qpolygonf.html#at">at</a></b> (<i>self</i>, int <i>i</i>)</li><li><div class="fn" />QRectF <b><a href="qpolygonf.html#boundingRect">boundingRect</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qpolygonf.html#clear">clear</a></b> (<i>self</i>)</li><li><div class="fn" />bool <b><a href="qpolygonf.html#contains">contains</a></b> (<i>self</i>, QPointF <i>value</i>)</li><li><div class="fn" />bool <b><a href="qpolygonf.html#containsPoint">containsPoint</a></b> (<i>self</i>, QPointF, Qt.FillRule)</li><li><div class="fn" />int <b><a href="qpolygonf.html#count">count</a></b> (<i>self</i>, QPointF <i>value</i>)</li><li><div class="fn" />int <b><a href="qpolygonf.html#count-2">count</a></b> (<i>self</i>)</li><li><div class="fn" />sip.voidptr <b><a href="qpolygonf.html#data">data</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qpolygonf.html#fill">fill</a></b> (<i>self</i>, QPointF <i>value</i>, int <i>size</i> = -1)</li><li><div class="fn" />QPointF <b><a href="qpolygonf.html#first">first</a></b> (<i>self</i>)</li><li><div class="fn" />int <b><a href="qpolygonf.html#indexOf">indexOf</a></b> (<i>self</i>, QPointF <i>value</i>, int <i>from</i> = 0)</li><li><div class="fn" /><b><a href="qpolygonf.html#insert">insert</a></b> (<i>self</i>, int <i>i</i>, QPointF <i>value</i>)</li><li><div class="fn" />QPolygonF <b><a href="qpolygonf.html#intersected">intersected</a></b> (<i>self</i>, QPolygonF)</li><li><div class="fn" />bool <b><a href="qpolygonf.html#isClosed">isClosed</a></b> (<i>self</i>)</li><li><div class="fn" />bool <b><a href="qpolygonf.html#isEmpty">isEmpty</a></b> (<i>self</i>)</li><li><div class="fn" />QPointF <b><a href="qpolygonf.html#last">last</a></b> (<i>self</i>)</li><li><div class="fn" />int <b><a href="qpolygonf.html#lastIndexOf">lastIndexOf</a></b> (<i>self</i>, QPointF <i>value</i>, int <i>from</i> = -1)</li><li><div class="fn" />QPolygonF <b><a href="qpolygonf.html#mid">mid</a></b> (<i>self</i>, int <i>pos</i>, int <i>length</i> = -1)</li><li><div class="fn" /><b><a href="qpolygonf.html#prepend">prepend</a></b> (<i>self</i>, QPointF <i>value</i>)</li><li><div class="fn" /><b><a href="qpolygonf.html#remove">remove</a></b> (<i>self</i>, int <i>i</i>)</li><li><div class="fn" /><b><a href="qpolygonf.html#remove-2">remove</a></b> (<i>self</i>, int <i>i</i>, int <i>count</i>)</li><li><div class="fn" /><b><a href="qpolygonf.html#replace">replace</a></b> (<i>self</i>, int <i>i</i>, QPointF <i>value</i>)</li><li><div class="fn" />int <b><a href="qpolygonf.html#size">size</a></b> (<i>self</i>)</li><li><div class="fn" />QPolygonF <b><a href="qpolygonf.html#subtracted">subtracted</a></b> (<i>self</i>, QPolygonF)</li><li><div class="fn" />QPolygon <b><a href="qpolygonf.html#toPolygon">toPolygon</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qpolygonf.html#translate">translate</a></b> (<i>self</i>, QPointF)</li><li><div class="fn" /><b><a href="qpolygonf.html#translate-2">translate</a></b> (<i>self</i>, float, float)</li><li><div class="fn" />QPolygonF <b><a href="qpolygonf.html#translated">translated</a></b> (<i>self</i>, QPointF)</li><li><div class="fn" />QPolygonF <b><a href="qpolygonf.html#translated-2">translated</a></b> (<i>self</i>, float, float)</li><li><div class="fn" />QPolygonF <b><a href="qpolygonf.html#united">united</a></b> (<i>self</i>, QPolygonF)</li><li><div class="fn" />QPointF <b><a href="qpolygonf.html#value">value</a></b> (<i>self</i>, int <i>i</i>)</li><li><div class="fn" />QPointF <b><a href="qpolygonf.html#value-2">value</a></b> (<i>self</i>, int <i>i</i>, QPointF <i>defaultValue</i>)</li></ul><h3>Special Methods</h3><ul><li><div class="fn" />QPolygonF <b><a href="qpolygonf.html#__add__">__add__</a></b> (<i>self</i>, QPolygonF <i>other</i>)</li><li><div class="fn" />int <b><a href="qpolygonf.html#__contains__">__contains__</a></b> (<i>self</i>, QPointF <i>value</i>)</li><li><div class="fn" /><b><a href="qpolygonf.html#__delitem__">__delitem__</a></b> (<i>self</i>, int <i>i</i>)</li><li><div class="fn" /><b><a href="qpolygonf.html#__delitem__-2">__delitem__</a></b> (<i>self</i>, slice <i>slice</i>)</li><li><div class="fn" />bool <b><a href="qpolygonf.html#__eq__">__eq__</a></b> (<i>self</i>, QPolygonF <i>other</i>)</li><li><div class="fn" />QPointF <b><a href="qpolygonf.html#__getitem__">__getitem__</a></b> (<i>self</i>, int <i>i</i>)</li><li><div class="fn" />QPolygonF <b><a href="qpolygonf.html#__getitem__-2">__getitem__</a></b> (<i>self</i>, slice <i>slice</i>)</li><li><div class="fn" />QPolygonF <b><a href="qpolygonf.html#__iadd__">__iadd__</a></b> (<i>self</i>, QPolygonF <i>other</i>)</li><li><div class="fn" />QPolygonF <b><a href="qpolygonf.html#__iadd__-2">__iadd__</a></b> (<i>self</i>, QPointF <i>value</i>)</li><li><div class="fn" />int <b><a href="qpolygonf.html#__len__">__len__</a></b> (<i>self</i>)</li><li><div class="fn" />QPolygonF <b><a href="qpolygonf.html#__mul__">__mul__</a></b> (<i>self</i>, QMatrix)</li><li><div class="fn" />QPolygonF <b><a href="qpolygonf.html#__mul__-2">__mul__</a></b> (<i>self</i>, QTransform)</li><li><div class="fn" />bool <b><a href="qpolygonf.html#__ne__">__ne__</a></b> (<i>self</i>, QPolygonF <i>other</i>)</li><li><div class="fn" /><b><a href="qpolygonf.html#__setitem__">__setitem__</a></b> (<i>self</i>, int <i>i</i>, QPointF <i>value</i>)</li><li><div class="fn" /><b><a href="qpolygonf.html#__setitem__-2">__setitem__</a></b> (<i>self</i>, slice <i>slice</i>, QPolygonF <i>list</i>)</li></ul><a name="details" /><hr /><h2>Detailed Description</h2><p>The QPolygonF class provides a vector of points using floating point precision.</p>
<p>A QPolygonF is a <a href="qvector.html">QVector</a><<a href="qpointf.html">QPointF</a>>. The easiest way to add points to a QPolygonF is to use its streaming operator, as illustrated below:</p>
<pre> QPolygonF polygon;
polygon << QPointF(10.4, 20.5) << QPointF(20.2, 30.2);</pre>
<p>In addition to the functions provided by <a href="qvector.html">QVector</a>, QPolygonF provides the <a href="qpolygonf.html#boundingRect">boundingRect</a>() and <a href="qpolygonf.html#translate">translate</a>() functions for geometry operations. Use the <a href="qmatrix.html#map">QMatrix.map</a>() function for more general transformations of QPolygonFs.</p>
<p>QPolygonF also provides the <a href="qpolygonf.html#isClosed">isClosed</a>() function to determine whether a polygon's start and end points are the same, and the <a href="qpolygonf.html#toPolygon">toPolygon</a>() function returning an integer precision copy of this polygon.</p>
<p>The QPolygonF class is <a href="implicit-sharing.html#implicit-data-sharing">implicitly shared</a>.</p>
<p>See also <a href="qvector.html">QVector</a>, <a href="qpolygon.html">QPolygon</a>, and <a href="qlinef.html">QLineF</a>.</p>
<hr /><h2>Method Documentation</h2><h3 class="fn"><a name="QPolygonF" />QPolygonF.__init__ (<i>self</i>)</h3><p>Constructs a polygon with no points.</p>
<p>See also <a href="qvector.html#isEmpty">QVector.isEmpty</a>().</p>
<h3 class="fn"><a name="QPolygonF-2" />QPolygonF.__init__ (<i>self</i>, <a href="qpolygonf.html">QPolygonF</a>)</h3><p>Constructs a polygon of the given <i>size</i>. Creates an empty polygon if <i>size</i> == 0.</p>
<p>See also <a href="qvector.html#isEmpty">QVector.isEmpty</a>().</p>
<h3 class="fn"><a name="QPolygonF-3" />QPolygonF.__init__ (<i>self</i>, list-of-QPointF)</h3><p>Constructs a copy of the given <i>polygon</i>.</p>
<h3 class="fn"><a name="QPolygonF-4" />QPolygonF.__init__ (<i>self</i>, <a href="qrectf.html">QRectF</a>)</h3><p>Constructs a polygon containing the specified <i>points</i>.</p>
<h3 class="fn"><a name="QPolygonF-5" />QPolygonF.__init__ (<i>self</i>, <a href="qpolygon.html">QPolygon</a>)</h3><p>Constructs a closed polygon from the specified <i>rectangle</i>.</p>
<p>The polygon contains the four vertices of the rectangle in clockwise order starting and ending with the top-left vertex.</p>
<p>See also <a href="qpolygonf.html#isClosed">isClosed</a>().</p>
<h3 class="fn"><a name="QPolygonF-6" />QPolygonF.__init__ (<i>self</i>, int)</h3><p>Constructs a float based polygon from the specified integer based <i>polygon</i>.</p>
<p>See also <a href="qpolygonf.html#toPolygon">toPolygon</a>().</p>
<a name="//apple_ref/cpp/instm/QPolygonF/~QPolygonF" />
<h3 class="fn"><a name="append" />QPolygonF.append (<i>self</i>, <a href="qpointf.html">QPointF</a> <i>value</i>)</h3><h3 class="fn"><a name="at" /><a href="qpointf.html">QPointF</a> QPolygonF.at (<i>self</i>, int <i>i</i>)</h3><h3 class="fn"><a name="boundingRect" /><a href="qrectf.html">QRectF</a> QPolygonF.boundingRect (<i>self</i>)</h3><p>Returns the bounding rectangle of the polygon, or <a href="qrectf.html">QRectF</a>(0,0,0,0) if the polygon is empty.</p>
<p>See also <a href="qvector.html#isEmpty">QVector.isEmpty</a>().</p>
<a name="//apple_ref/cpp/instm/QPolygonF/containsPoint" />
<h3 class="fn"><a name="clear" />QPolygonF.clear (<i>self</i>)</h3><h3 class="fn"><a name="contains" />bool QPolygonF.contains (<i>self</i>, <a href="qpointf.html">QPointF</a> <i>value</i>)</h3><h3 class="fn"><a name="containsPoint" />bool QPolygonF.containsPoint (<i>self</i>, <a href="qpointf.html">QPointF</a>, <a href="qt.html#FillRule-enum">Qt.FillRule</a>)</h3><p>Returns true if the given <i>point</i> is inside the polygon according to the specified <i>fillRule</i>; otherwise returns false.</p>
<p>This function was introduced in Qt 4.3.</p>
<a name="//apple_ref/cpp/instm/QPolygonF/intersected" />
<h3 class="fn"><a name="count" />int QPolygonF.count (<i>self</i>, <a href="qpointf.html">QPointF</a> <i>value</i>)</h3><h3 class="fn"><a name="count-2" />int QPolygonF.count (<i>self</i>)</h3><h3 class="fn"><a name="data" />sip.voidptr QPolygonF.data (<i>self</i>)</h3><h3 class="fn"><a name="fill" />QPolygonF.fill (<i>self</i>, <a href="qpointf.html">QPointF</a> <i>value</i>, int <i>size</i> = -1)</h3><h3 class="fn"><a name="first" /><a href="qpointf.html">QPointF</a> QPolygonF.first (<i>self</i>)</h3><h3 class="fn"><a name="indexOf" />int QPolygonF.indexOf (<i>self</i>, <a href="qpointf.html">QPointF</a> <i>value</i>, int <i>from</i> = 0)</h3><h3 class="fn"><a name="insert" />QPolygonF.insert (<i>self</i>, int <i>i</i>, <a href="qpointf.html">QPointF</a> <i>value</i>)</h3><h3 class="fn"><a name="intersected" /><a href="qpolygonf.html">QPolygonF</a> QPolygonF.intersected (<i>self</i>, <a href="qpolygonf.html">QPolygonF</a>)</h3><p>Returns a polygon which is the intersection of this polygon and <i>r</i>.</p>
<p>Set operations on polygons will treat the polygons as areas. Non-closed polygons will be treated as implicitly closed.</p>
<p>This function was introduced in Qt 4.3.</p>
<a name="//apple_ref/cpp/instm/QPolygonF/isClosed" />
<h3 class="fn"><a name="isClosed" />bool QPolygonF.isClosed (<i>self</i>)</h3><p>Returns true if the polygon is closed; otherwise returns false.</p>
<p>A polygon is said to be closed if its start point and end point are equal.</p>
<p>See also <a href="qvector.html#first">QVector.first</a>() and <a href="qvector.html#last">QVector.last</a>().</p>
<a name="//apple_ref/cpp/instm/QPolygonF/subtracted" />
<h3 class="fn"><a name="isEmpty" />bool QPolygonF.isEmpty (<i>self</i>)</h3><h3 class="fn"><a name="last" /><a href="qpointf.html">QPointF</a> QPolygonF.last (<i>self</i>)</h3><h3 class="fn"><a name="lastIndexOf" />int QPolygonF.lastIndexOf (<i>self</i>, <a href="qpointf.html">QPointF</a> <i>value</i>, int <i>from</i> = -1)</h3><h3 class="fn"><a name="mid" /><a href="qpolygonf.html">QPolygonF</a> QPolygonF.mid (<i>self</i>, int <i>pos</i>, int <i>length</i> = -1)</h3><h3 class="fn"><a name="prepend" />QPolygonF.prepend (<i>self</i>, <a href="qpointf.html">QPointF</a> <i>value</i>)</h3><h3 class="fn"><a name="remove" />QPolygonF.remove (<i>self</i>, int <i>i</i>)</h3><h3 class="fn"><a name="remove-2" />QPolygonF.remove (<i>self</i>, int <i>i</i>, int <i>count</i>)</h3><h3 class="fn"><a name="replace" />QPolygonF.replace (<i>self</i>, int <i>i</i>, <a href="qpointf.html">QPointF</a> <i>value</i>)</h3><h3 class="fn"><a name="size" />int QPolygonF.size (<i>self</i>)</h3><h3 class="fn"><a name="subtracted" /><a href="qpolygonf.html">QPolygonF</a> QPolygonF.subtracted (<i>self</i>, <a href="qpolygonf.html">QPolygonF</a>)</h3><p>Returns a polygon which is <i>r</i> subtracted from this polygon.</p>
<p>Set operations on polygons will treat the polygons as areas. Non-closed polygons will be treated as implicitly closed.</p>
<p>This function was introduced in Qt 4.3.</p>
<a name="//apple_ref/cpp/instm/QPolygonF/toPolygon" />
<h3 class="fn"><a name="toPolygon" /><a href="qpolygon.html">QPolygon</a> QPolygonF.toPolygon (<i>self</i>)</h3><p>Creates and returns a <a href="qpolygon.html">QPolygon</a> by converting each <a href="qpointf.html">QPointF</a> to a <a href="qpoint.html">QPoint</a>.</p>
<p>See also <a href="qpointf.html#toPoint">QPointF.toPoint</a>().</p>
<a name="//apple_ref/cpp/instm/QPolygonF/translate" />
<h3 class="fn"><a name="translate" />QPolygonF.translate (<i>self</i>, <a href="qpointf.html">QPointF</a>)</h3><p>Translate all points in the polygon by the given <i>offset</i>.</p>
<p>See also <a href="qpolygonf.html#translated">translated</a>().</p>
<h3 class="fn"><a name="translate-2" />QPolygonF.translate (<i>self</i>, float, float)</h3><p>This is an overloaded function.</p>
<p>Translates all points in the polygon by (<i>dx</i>, <i>dy</i>).</p>
<p>See also <a href="qpolygonf.html#translated">translated</a>().</p>
<a name="//apple_ref/cpp/instm/QPolygonF/translated" />
<h3 class="fn"><a name="translated" /><a href="qpolygonf.html">QPolygonF</a> QPolygonF.translated (<i>self</i>, <a href="qpointf.html">QPointF</a>)</h3><p>Returns a copy of the polygon that is translated by the given <i>offset</i>.</p>
<p>This function was introduced in Qt 4.6.</p>
<p>See also <a href="qpolygonf.html#translate">translate</a>().</p>
<h3 class="fn"><a name="translated-2" /><a href="qpolygonf.html">QPolygonF</a> QPolygonF.translated (<i>self</i>, float, float)</h3><p>This is an overloaded function.</p>
<p>Returns a copy of the polygon that is translated by (<i>dx</i>, <i>dy</i>).</p>
<p>This function was introduced in Qt 4.6.</p>
<p>See also <a href="qpolygonf.html#translate">translate</a>().</p>
<a name="//apple_ref/cpp/instm/QPolygonF/united" />
<h3 class="fn"><a name="united" /><a href="qpolygonf.html">QPolygonF</a> QPolygonF.united (<i>self</i>, <a href="qpolygonf.html">QPolygonF</a>)</h3><p>Returns a polygon which is the union of this polygon and <i>r</i>.</p>
<p>Set operations on polygons will treat the polygons as areas. Non-closed polygons will be treated as implicitly closed.</p>
<p>This function was introduced in Qt 4.3.</p>
<p>See also <a href="qpolygonf.html#intersected">intersected</a>() and <a href="qpolygonf.html#subtracted">subtracted</a>().</p>
<h3 class="fn"><a name="value" /><a href="qpointf.html">QPointF</a> QPolygonF.value (<i>self</i>, int <i>i</i>)</h3><h3 class="fn"><a name="value-2" /><a href="qpointf.html">QPointF</a> QPolygonF.value (<i>self</i>, int <i>i</i>, <a href="qpointf.html">QPointF</a> <i>defaultValue</i>)</h3><h3 class="fn"><a name="__add__" /><a href="qpolygonf.html">QPolygonF</a> QPolygonF.__add__ (<i>self</i>, <a href="qpolygonf.html">QPolygonF</a> <i>other</i>)</h3><h3 class="fn"><a name="__contains__" />int QPolygonF.__contains__ (<i>self</i>, <a href="qpointf.html">QPointF</a> <i>value</i>)</h3><h3 class="fn"><a name="__delitem__" />QPolygonF.__delitem__ (<i>self</i>, int <i>i</i>)</h3><h3 class="fn"><a name="__delitem__-2" />QPolygonF.__delitem__ (<i>self</i>, slice <i>slice</i>)</h3><h3 class="fn"><a name="__eq__" />bool QPolygonF.__eq__ (<i>self</i>, <a href="qpolygonf.html">QPolygonF</a> <i>other</i>)</h3><h3 class="fn"><a name="__getitem__" /><a href="qpointf.html">QPointF</a> QPolygonF.__getitem__ (<i>self</i>, int <i>i</i>)</h3><h3 class="fn"><a name="__getitem__-2" /><a href="qpolygonf.html">QPolygonF</a> QPolygonF.__getitem__ (<i>self</i>, slice <i>slice</i>)</h3><h3 class="fn"><a name="__iadd__" /><a href="qpolygonf.html">QPolygonF</a> QPolygonF.__iadd__ (<i>self</i>, <a href="qpolygonf.html">QPolygonF</a> <i>other</i>)</h3><h3 class="fn"><a name="__iadd__-2" /><a href="qpolygonf.html">QPolygonF</a> QPolygonF.__iadd__ (<i>self</i>, <a href="qpointf.html">QPointF</a> <i>value</i>)</h3><h3 class="fn"><a name="__len__" />int QPolygonF.__len__ (<i>self</i>)</h3><h3 class="fn"><a name="__mul__" /><a href="qpolygonf.html">QPolygonF</a> QPolygonF.__mul__ (<i>self</i>, <a href="qmatrix.html">QMatrix</a>)</h3><h3 class="fn"><a name="__mul__-2" /><a href="qpolygonf.html">QPolygonF</a> QPolygonF.__mul__ (<i>self</i>, <a href="qtransform.html">QTransform</a>)</h3><h3 class="fn"><a name="__ne__" />bool QPolygonF.__ne__ (<i>self</i>, <a href="qpolygonf.html">QPolygonF</a> <i>other</i>)</h3><h3 class="fn"><a name="__setitem__" />QPolygonF.__setitem__ (<i>self</i>, int <i>i</i>, <a href="qpointf.html">QPointF</a> <i>value</i>)</h3><h3 class="fn"><a name="__setitem__-2" />QPolygonF.__setitem__ (<i>self</i>, slice <i>slice</i>, <a href="qpolygonf.html">QPolygonF</a> <i>list</i>)</h3><address><hr /><div align="center"><table border="0" cellspacing="0" width="100%"><tr class="address"><td align="left" width="25%">PyQt 4.7.3 for X11</td><td align="center" width="50%">Copyright © <a href="http://www.riverbankcomputing.com">Riverbank Computing Ltd</a> and <a href="http://www.qtsoftware.com">Nokia</a> 2010</td><td align="right" width="25%">Qt 4.6.2</td></tr></table></div></address></body></html>
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