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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><!-- /home/reggie/tmp/qt-3.0-reggie-5401/qt-x11-commercial-3.0.5/src/canvas/qcanvas.cpp:3925 --><html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>QCanvasPolygon Class</title><style type="text/css"><!--h3.fn,span.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>QCanvasPolygon Class Reference<br><small>[<a href="canvas.html">canvas module</a>]</small></h1><p>The QCanvasPolygon class provides a polygon on a QCanvas.<a href="#details">More...</a><p><tt>#include <<a href="qcanvas-h.html">qcanvas.h</a>></tt><p>Inherits <a href="qcanvaspolygonalitem.html">QCanvasPolygonalItem</a>.<p>Inherited by <a href="qcanvasspline.html">QCanvasSpline</a>.<p><a href="qcanvaspolygon-members.html">List of all member functions.</a><h2>Public Members</h2><ul><li><div class=fn><a href="#QCanvasPolygon"><b>QCanvasPolygon</b></a> ( QCanvas * canvas )</div></li><li><div class=fn><a href="#~QCanvasPolygon"><b>~QCanvasPolygon</b></a> ()</div></li><li><div class=fn>void <a href="#setPoints"><b>setPoints</b></a> ( QPointArray pa )</div></li><li><div class=fn>QPointArray <a href="#points"><b>points</b></a> () const</div></li><li><div class=fn>virtual QPointArray <a href="#areaPoints"><b>areaPoints</b></a> () const</div></li><li><div class=fn>virtual int <a href="#rtti"><b>rtti</b></a> () const</div></li></ul><h2>Protected Members</h2><ul><li><div class=fn>virtual void <a href="#drawShape"><b>drawShape</b></a> ( QPainter & p )</div></li></ul><hr><a name="details"></a><h2>Detailed Description</h2>The QCanvasPolygon class provides a polygon on a <a href="qcanvas.html">QCanvas</a>.<p> Paints a polygon with a <a href="qbrush.html">QBrush</a>. The polygon's points can be set in theconstructor or set or changed later using <a href="#setPoints">setPoints</a>(). Use <a href="#points">points</a>() toretrieve the points, or <a href="#areaPoints">areaPoints</a>() to retrieve the points relativeto the canvas's origin.<p> The polygon can be drawn on a painter with <a href="#drawShape">drawShape</a>().<p> Like any other canvas item polygons can be moved with<a href="qcanvasitem.html#move">QCanvasItem::move</a>() and <a href="qcanvasitem.html#moveBy">QCanvasItem::moveBy</a>(), or by setting coordinateswith <a href="qcanvasitem.html#setX">QCanvasItem::setX</a>(), <a href="qcanvasitem.html#setY">QCanvasItem::setY</a>() and <a href="qcanvasitem.html#setZ">QCanvasItem::setZ</a>().<p> <p>See also <a href="graphics.html">Graphics Classes</a> and <a href="images.html">Image Processing Classes</a>.<hr><h2>Member Function Documentation</h2><h3 class=fn><a name="QCanvasPolygon"></a>QCanvasPolygon::QCanvasPolygon ( <a href="qcanvas.html">QCanvas</a> * canvas )</h3>Constructs a point-less polygon on the canvas <em>canvas</em>.You should call <a href="#setPoints">setPoints</a>() beforeusing it further.<h3 class=fn><a name="~QCanvasPolygon"></a>QCanvasPolygon::~QCanvasPolygon ()</h3>Destroys the polygon.<h3 class=fn><a href="qpointarray.html">QPointArray</a> <a name="areaPoints"></a>QCanvasPolygon::areaPoints () const<tt> [virtual]</tt></h3>Returns the vertices of the polygon translated by the polygon'scurrent <a href="qcanvasitem.html#x">x</a>(), <a href="qcanvasitem.html#y">y</a>() position, i.e. relative to the canvas's origin.<p> <p>See also <a href="#setPoints">setPoints</a>() and <a href="#points">points</a>().<p>Reimplemented from <a href="qcanvaspolygonalitem.html#areaPoints">QCanvasPolygonalItem</a>.<h3 class=fn>void <a name="drawShape"></a>QCanvasPolygon::drawShape ( <a href="qpainter.html">QPainter</a> & p )<tt> [virtual protected]</tt></h3>Draws the polygon using the painter <em>p</em>.<p> Note that QCanvasPolygon does not support an outline (pen isalways NoPen).<p>Reimplemented from <a href="qcanvaspolygonalitem.html#drawShape">QCanvasPolygonalItem</a>.<h3 class=fn><a href="qpointarray.html">QPointArray</a> <a name="points"></a>QCanvasPolygon::points () const</h3><p> Returns the vertices of the polygon, not translated by the position.<p> <p>See also <a href="#setPoints">setPoints</a>() and <a href="#areaPoints">areaPoints</a>().<h3 class=fn>int <a name="rtti"></a>QCanvasPolygon::rtti () const<tt> [virtual]</tt></h3>Returns 4 (QCanvasItem::Rtti_Polygon).<p> <p>See also <a href="qcanvasitem.html#rtti">QCanvasItem::rtti</a>().<p>Reimplemented from <a href="qcanvaspolygonalitem.html#rtti">QCanvasPolygonalItem</a>.<p>Reimplemented in <a href="qcanvasspline.html#rtti">QCanvasSpline</a>.<h3 class=fn>void <a name="setPoints"></a>QCanvasPolygon::setPoints ( <a href="qpointarray.html">QPointArray</a> pa )</h3>Sets the points of the polygon to be <em>pa</em>. These points will havetheir x and y coordinates automatically translated by <a href="qcanvasitem.html#x">x</a>(), <a href="qcanvasitem.html#y">y</a>() as thepolygon is moved.<!-- eof --><hr><p>This file is part of the <a href="index.html">Qt toolkit</a>.Copyright © 1995-2002<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 © 2002 <a href="http://www.trolltech.com">Trolltech</a><td><a href="http://www.trolltech.com/trademarks.html">Trademarks</a><td align=right><div align=right>Qt version 3.0.5</div></table></div></address></body></html>⌨️ 快捷键说明
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