You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
122 lines
5.7 KiB
122 lines
5.7 KiB
<!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/tqcanvas.cpp:4227 -->
|
|
<html>
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
|
|
<title>TQCanvasSpline 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>TQCanvasSpline Class Reference<br><small>[<a href="canvas.html">canvas module</a>]</small></h1>
|
|
|
|
<p>The TQCanvasSpline class provides multi-bezier splines on a TQCanvas.
|
|
<a href="#details">More...</a>
|
|
<p><tt>#include <<a href="tqcanvas-h.html">tqcanvas.h</a>></tt>
|
|
<p>Inherits <a href="tqcanvaspolygon.html">TQCanvasPolygon</a>.
|
|
<p><a href="tqcanvasspline-members.html">List of all member functions.</a>
|
|
<h2>Public Members</h2>
|
|
<ul>
|
|
<li class=fn><a href="#TQCanvasSpline"><b>TQCanvasSpline</b></a> ( TQCanvas * canvas )</li>
|
|
<li class=fn><a href="#~TQCanvasSpline"><b>~TQCanvasSpline</b></a> ()</li>
|
|
<li class=fn>void <a href="#setControlPoints"><b>setControlPoints</b></a> ( TQPointArray ctrl, bool close = TRUE )</li>
|
|
<li class=fn>TQPointArray <a href="#controlPoints"><b>controlPoints</b></a> () const</li>
|
|
<li class=fn>bool <a href="#closed"><b>closed</b></a> () const</li>
|
|
<li class=fn>virtual int <a href="#rtti"><b>rtti</b></a> () const</li>
|
|
</ul>
|
|
<hr><a name="details"></a><h2>Detailed Description</h2>
|
|
|
|
|
|
The TQCanvasSpline class provides multi-bezier splines on a <a href="tqcanvas.html">TQCanvas</a>.
|
|
|
|
<p>
|
|
|
|
|
|
<p> A TQCanvasSpline is a sequence of 4-point bezier curves joined
|
|
together to make a curved shape.
|
|
<p> You set the control points of the spline with <a href="#setControlPoints">setControlPoints</a>().
|
|
<p> If the bezier is <a href="#closed">closed</a>(), then the first control point will be
|
|
re-used as the last control point. Therefore, a closed bezier must
|
|
have a multiple of 3 control points and an open bezier must have
|
|
one extra point.
|
|
<p> The beziers are not necessarily joined "smoothly". To ensure this,
|
|
set control points appropriately (general reference texts about
|
|
beziers will explain this in detail).
|
|
<p> Like any other canvas item splines can be moved with
|
|
<a href="tqcanvasitem.html#move">TQCanvasItem::move</a>() and <a href="tqcanvasitem.html#moveBy">TQCanvasItem::moveBy</a>(), or by setting
|
|
coordinates with <a href="tqcanvasitem.html#setX">TQCanvasItem::setX</a>(), <a href="tqcanvasitem.html#setY">TQCanvasItem::setY</a>() and
|
|
<a href="tqcanvasitem.html#setZ">TQCanvasItem::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="TQCanvasSpline"></a>TQCanvasSpline::TQCanvasSpline ( <a href="tqcanvas.html">TQCanvas</a> * canvas )
|
|
</h3>
|
|
Create a spline with no control points on the canvas <em>canvas</em>.
|
|
<p> <p>See also <a href="#setControlPoints">setControlPoints</a>().
|
|
|
|
<h3 class=fn><a name="~TQCanvasSpline"></a>TQCanvasSpline::~TQCanvasSpline ()
|
|
</h3>
|
|
Destroy the spline.
|
|
|
|
<h3 class=fn>bool <a name="closed"></a>TQCanvasSpline::closed () const
|
|
</h3>
|
|
Returns TRUE if the control points are a closed set; otherwise
|
|
returns FALSE.
|
|
|
|
<h3 class=fn><a href="ntqpointarray.html">TQPointArray</a> <a name="controlPoints"></a>TQCanvasSpline::controlPoints () const
|
|
</h3>
|
|
Returns the current set of control points.
|
|
<p> <p>See also <a href="#setControlPoints">setControlPoints</a>() and <a href="#closed">closed</a>().
|
|
|
|
<h3 class=fn>int <a name="rtti"></a>TQCanvasSpline::rtti () const<tt> [virtual]</tt>
|
|
</h3>
|
|
Returns 8 (TQCanvasItem::Rtti_Spline).
|
|
<p> <p>See also <a href="tqcanvasitem.html#rtti">TQCanvasItem::rtti</a>().
|
|
|
|
<p>Reimplemented from <a href="tqcanvaspolygon.html#rtti">TQCanvasPolygon</a>.
|
|
<h3 class=fn>void <a name="setControlPoints"></a>TQCanvasSpline::setControlPoints ( <a href="ntqpointarray.html">TQPointArray</a> ctrl, bool close = TRUE )
|
|
</h3>
|
|
Set the spline control points to <em>ctrl</em>.
|
|
<p> If <em>close</em> is TRUE, then the first point in <em>ctrl</em> will be
|
|
re-used as the last point, and the number of control points must
|
|
be a multiple of 3. If <em>close</em> is FALSE, one additional control
|
|
point is required, and the number of control points must be one of
|
|
(4, 7, 10, 13, ...).
|
|
<p> If the number of control points doesn't meet the above conditions,
|
|
the number of points will be truncated to the largest number of
|
|
points that do meet the requirement.
|
|
|
|
<p>Example: <a href="canvas-example.html#x2926">canvas/canvas.cpp</a>.
|
|
<!-- eof -->
|
|
<hr><p>
|
|
This file is part of the <a href="index.html">TQt toolkit</a>.
|
|
Copyright © 1995-2007
|
|
<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 © 2007
|
|
<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
|
|
<td align=right><div align=right>TQt 3.3.8</div>
|
|
</table></div></address></body>
|
|
</html>
|