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| author | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-07-10 15:24:15 -0500 |
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| committer | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-07-10 15:24:15 -0500 |
| commit | bd0f3345a938b35ce6a12f6150373b0955b8dd12 (patch) | |
| tree | 7a520322212d48ebcb9fbe1087e7fca28b76185c /doc/html/qcanvasellipse.html | |
| download | qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.tar.gz qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.zip | |
Add Qt3 development HEAD version
Diffstat (limited to 'doc/html/qcanvasellipse.html')
| -rw-r--r-- | doc/html/qcanvasellipse.html | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/doc/html/qcanvasellipse.html b/doc/html/qcanvasellipse.html new file mode 100644 index 0000000..b809cf5 --- /dev/null +++ b/doc/html/qcanvasellipse.html @@ -0,0 +1,169 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> +<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/canvas/qcanvas.cpp:4671 --> +<html> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> +<title>QCanvasEllipse Class</title> +<style type="text/css"><!-- +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>QCanvasEllipse Class Reference<br><small>[<a href="canvas.html">canvas module</a>]</small></h1> + +<p>The QCanvasEllipse class provides an ellipse or ellipse segment 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><a href="qcanvasellipse-members.html">List of all member functions.</a> +<h2>Public Members</h2> +<ul> +<li class=fn><a href="#QCanvasEllipse"><b>QCanvasEllipse</b></a> ( QCanvas * canvas )</li> +<li class=fn><a href="#QCanvasEllipse-2"><b>QCanvasEllipse</b></a> ( int width, int height, QCanvas * canvas )</li> +<li class=fn><a href="#QCanvasEllipse-3"><b>QCanvasEllipse</b></a> ( int width, int height, int startangle, int angle, QCanvas * canvas )</li> +<li class=fn><a href="#~QCanvasEllipse"><b>~QCanvasEllipse</b></a> ()</li> +<li class=fn>int <a href="#width"><b>width</b></a> () const</li> +<li class=fn>int <a href="#height"><b>height</b></a> () const</li> +<li class=fn>void <a href="#setSize"><b>setSize</b></a> ( int width, int height )</li> +<li class=fn>void <a href="#setAngles"><b>setAngles</b></a> ( int start, int length )</li> +<li class=fn>int <a href="#angleStart"><b>angleStart</b></a> () const</li> +<li class=fn>int <a href="#angleLength"><b>angleLength</b></a> () const</li> +<li class=fn>virtual int <a href="#rtti"><b>rtti</b></a> () const</li> +</ul> +<h2>Protected Members</h2> +<ul> +<li class=fn>virtual void <a href="#drawShape"><b>drawShape</b></a> ( QPainter & p )</li> +</ul> +<hr><a name="details"></a><h2>Detailed Description</h2> + + +The QCanvasEllipse class provides an ellipse or ellipse segment on a <a href="qcanvas.html">QCanvas</a>. + +<p> + + +<p> A canvas item that paints an ellipse or ellipse segment with a <a href="qbrush.html">QBrush</a>. +The ellipse's height, width, start angle and angle length can be set +at construction time. The size can be changed at runtime with +<a href="#setSize">setSize</a>(), and the angles can be changed (if you're displaying an +ellipse segment rather than a whole ellipse) with <a href="#setAngles">setAngles</a>(). +<p> Note that angles are specified in 16ths of a degree. +<p> <a name="anglediagram"></a> +<center><img src="qcanvasellipse.png" alt="Ellipse"></center> +<p> If a start angle and length angle are set then an ellipse segment +will be drawn. The start angle is the angle that goes from zero in a +counter-clockwise direction (shown in green in the diagram). The +length angle is the angle from the start angle in a +counter-clockwise direction (shown in blue in the diagram). The blue +segment is the segment of the ellipse that would be drawn. If no +start angle and length angle are specified the entire ellipse is +drawn. +<p> The ellipse can be drawn on a painter with <a href="#drawShape">drawShape</a>(). +<p> Like any other canvas item ellipses can be moved with <a href="qcanvasitem.html#move">move</a>() and +<a href="qcanvasitem.html#moveBy">moveBy</a>(), or by setting coordinates with <a href="qcanvasitem.html#setX">setX</a>(), <a href="qcanvasitem.html#setY">setY</a>() and <a href="qcanvasitem.html#setZ">setZ</a>(). +<p> Note: QCanvasEllipse does not use the pen. +<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="QCanvasEllipse"></a>QCanvasEllipse::QCanvasEllipse ( <a href="qcanvas.html">QCanvas</a> * canvas ) +</h3> +Constructs a 32x32 ellipse, centered at (0, 0) on <em>canvas</em>. + +<h3 class=fn><a name="QCanvasEllipse-2"></a>QCanvasEllipse::QCanvasEllipse ( int width, int height, <a href="qcanvas.html">QCanvas</a> * canvas ) +</h3> +Constructs a <em>width</em> by <em>height</em> pixel ellipse, centered at +(0, 0) on <em>canvas</em>. + +<h3 class=fn><a name="QCanvasEllipse-3"></a>QCanvasEllipse::QCanvasEllipse ( int width, int height, int startangle, int angle, <a href="qcanvas.html">QCanvas</a> * canvas ) +</h3> +Constructs a <em>width</em> by <em>height</em> pixel ellipse, centered at +(0, 0) on <em>canvas</em>. Only a segment of the ellipse is drawn, +starting at angle <em>startangle</em>, and extending for angle <em>angle</em> +(the angle length). +<p> Note that angles are specified in +<small><sup>1</sup>/<sub>16</sub></small>ths of a degree. + +<h3 class=fn><a name="~QCanvasEllipse"></a>QCanvasEllipse::~QCanvasEllipse () +</h3> +Destroys the ellipse. + +<h3 class=fn>int <a name="angleLength"></a>QCanvasEllipse::angleLength () const +</h3> + +<p> Returns the length angle (the extent of the ellipse segment) in +16ths of a degree. Initially this will be 360 * 16 (a complete +ellipse). +<p> <p>See also <a href="#setAngles">setAngles</a>() and <a href="#angleStart">angleStart</a>(). + +<h3 class=fn>int <a name="angleStart"></a>QCanvasEllipse::angleStart () const +</h3> + +<p> Returns the start angle in 16ths of a degree. Initially +this will be 0. +<p> <p>See also <a href="#setAngles">setAngles</a>() and <a href="#angleLength">angleLength</a>(). + +<h3 class=fn>void <a name="drawShape"></a>QCanvasEllipse::drawShape ( <a href="qpainter.html">QPainter</a> & p )<tt> [virtual protected]</tt> +</h3> +Draws the ellipse, centered at <a href="qcanvasitem.html#x">x</a>(), <a href="qcanvasitem.html#y">y</a>() using the painter <em>p</em>. +<p> Note that QCanvasEllipse does not support an outline (the pen is +always NoPen). + +<p>Reimplemented from <a href="qcanvaspolygonalitem.html#drawShape">QCanvasPolygonalItem</a>. +<h3 class=fn>int <a name="height"></a>QCanvasEllipse::height () const +</h3> +Returns the height of the ellipse. + +<h3 class=fn>int <a name="rtti"></a>QCanvasEllipse::rtti () const<tt> [virtual]</tt> +</h3> +Returns 6 (QCanvasItem::Rtti_Ellipse). +<p> <p>See also <a href="qcanvasitem.html#rtti">QCanvasItem::rtti</a>(). + +<p>Reimplemented from <a href="qcanvaspolygonalitem.html#rtti">QCanvasPolygonalItem</a>. +<h3 class=fn>void <a name="setAngles"></a>QCanvasEllipse::setAngles ( int start, int length ) +</h3> +Sets the angles for the ellipse. The start angle is <em>start</em> and +the extent of the segment is <em>length</em> (the angle length) from the +<em>start</em>. The angles are specified in 16ths of a degree. By +default the ellipse will start at 0 and have an angle length of +360 * 16 (a complete ellipse). +<p> <p>See also <a href="#angleStart">angleStart</a>() and <a href="#angleLength">angleLength</a>(). + +<h3 class=fn>void <a name="setSize"></a>QCanvasEllipse::setSize ( int width, int height ) +</h3> +Sets the <em>width</em> and <em>height</em> of the ellipse. + +<h3 class=fn>int <a name="width"></a>QCanvasEllipse::width () const +</h3> +Returns the width of the ellipse. + +<!-- eof --> +<hr><p> +This file is part of the <a href="index.html">Qt toolkit</a>. +Copyright © 1995-2007 +<a href="http://www.trolltech.com/">Trolltech</a>. 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