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Breadcrumbs go here --> <li><a href="modules.html">Modules</a></li> <li><a href="qt3support.html">Qt3Support</a></li> <li>Q3CanvasSpline</li> </ul> </div> <div class="toolbuttons toolblock"> <ul> <li id="smallA" class="t_button">A</li> <li id="medA" class="t_button active">A</li> <li id="bigA" class="t_button">A</li> <li id="print" class="t_button"><a href="javascript:this.print();"> <span>Print</span></a></li> </ul> </div> </div> <div class="content mainContent"> <div class="toc"> <h3><a name="toc">Contents</a></h3> <ul> <li class="level1"><a href="#public-functions">Public Functions</a></li> <li class="level1"><a href="#details">Detailed Description</a></li> </ul> </div> <h1 class="title">Q3CanvasSpline Class Reference</h1> <!-- $$$Q3CanvasSpline-brief --> <p>The Q3CanvasSpline class provides multi-bezier splines on a <a href="q3canvas.html">Q3Canvas</a>. <a href="#details">More...</a></p> <!-- @@@Q3CanvasSpline --> <pre class="cpp"> <span class="preprocessor">#include <Q3CanvasSpline></span></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 <a href="porting4.html">Porting to Qt 4</a> for more information.</p> <p><b>Inherits: </b><a href="q3canvaspolygon.html">Q3CanvasPolygon</a>.</p> <ul> <li><a href="q3canvasspline-members.html">List of all members, including inherited members</a></li> </ul> <a name="public-functions"></a> <h2>Public Functions</h2> <table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="q3canvasspline.html#Q3CanvasSpline">Q3CanvasSpline</a></b> ( Q3Canvas * <i>canvas</i> )</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="q3canvasspline.html#dtor.Q3CanvasSpline">~Q3CanvasSpline</a></b> ()</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="q3canvasspline.html#closed">closed</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> Q3PointArray </td><td class="memItemRight bottomAlign"><b><a href="q3canvasspline.html#controlPoints">controlPoints</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="q3canvasspline.html#setControlPoints">setControlPoints</a></b> ( Q3PointArray <i>ctrl</i>, bool <i>close</i> = true )</td></tr> </table> <a name="reimplemented-public-functions"></a> <h2>Reimplemented Public Functions</h2> <table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> virtual int </td><td class="memItemRight bottomAlign"><b><a href="q3canvasspline.html#rtti">rtti</a></b> () const</td></tr> </table> <ul> <li class="fn">5 public functions inherited from <a href="q3canvaspolygon.html#public-functions">Q3CanvasPolygon</a></li> <li class="fn">9 public functions inherited from <a href="q3canvaspolygonalitem.html#public-functions">Q3CanvasPolygonalItem</a></li> <li class="fn">34 public functions inherited from <a href="q3canvasitem.html#public-functions">Q3CanvasItem</a></li> </ul> <h3>Additional Inherited Members</h3> <ul> <li class="fn">1 protected function inherited from <a href="q3canvaspolygon.html#protected-functions">Q3CanvasPolygon</a></li> <li class="fn">6 protected functions inherited from <a href="q3canvaspolygonalitem.html#protected-functions">Q3CanvasPolygonalItem</a></li> <li class="fn">1 protected function inherited from <a href="q3canvasitem.html#protected-functions">Q3CanvasItem</a></li> </ul> <a name="details"></a> <!-- $$$Q3CanvasSpline-description --> <div class="descr"> <h2>Detailed Description</h2> <p>The Q3CanvasSpline class provides multi-bezier splines on a <a href="q3canvas.html">Q3Canvas</a>.</p> <p>A Q3CanvasSpline is a sequence of 4-point bezier curves joined together to make a curved shape.</p> <p>You set the control points of the spline with <a href="q3canvasspline.html#setControlPoints">setControlPoints</a>().</p> <p>If the bezier is <a href="q3canvasspline.html#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> <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> <p>Like any other canvas item splines can be moved with <a href="q3canvasitem.html#move">Q3CanvasItem::move</a>() and <a href="q3canvasitem.html#moveBy">Q3CanvasItem::moveBy</a>(), or by setting coordinates with <a href="q3canvasitem.html#setX">Q3CanvasItem::setX</a>(), <a href="q3canvasitem.html#setY">Q3CanvasItem::setY</a>() and <a href="q3canvasitem.html#setZ">Q3CanvasItem::setZ</a>().</p> </div> <p><b>See also </b><a href="http://qt.digia.com/product/">QtCanvas</a> and <a href="graphicsview-porting.html">Porting to Graphics View</a>.</p> <!-- @@@Q3CanvasSpline --> <div class="func"> <h2>Member Function Documentation</h2> <!-- $$$Q3CanvasSpline[overload1]$$$Q3CanvasSplineQ3Canvas* --> <h3 class="fn"><a name="Q3CanvasSpline"></a>Q3CanvasSpline::<span class="name">Q3CanvasSpline</span> ( <span class="type"><a href="q3canvas.html">Q3Canvas</a></span> * <i>canvas</i> )</h3> <p>Create a spline with no control points on the canvas <i>canvas</i>.</p> <p><b>See also </b><a href="q3canvasspline.html#setControlPoints">setControlPoints</a>().</p> <!-- @@@Q3CanvasSpline --> <!-- $$$~Q3CanvasSpline[overload1]$$$~Q3CanvasSpline --> <h3 class="fn"><a name="dtor.Q3CanvasSpline"></a>Q3CanvasSpline::<span class="name">~Q3CanvasSpline</span> ()</h3> <p>Destroy the spline.</p> <!-- @@@~Q3CanvasSpline --> <!-- $$$closed[overload1]$$$closed --> <h3 class="fn"><a name="closed"></a><span class="type">bool</span> Q3CanvasSpline::<span class="name">closed</span> () const</h3> <p>Returns true if the control points are a closed set; otherwise returns false.</p> <!-- @@@closed --> <!-- $$$controlPoints[overload1]$$$controlPoints --> <h3 class="fn"><a name="controlPoints"></a><span class="type"><a href="q3pointarray.html">Q3PointArray</a></span> Q3CanvasSpline::<span class="name">controlPoints</span> () const</h3> <p>Returns the current set of control points.</p> <p><b>See also </b><a href="q3canvasspline.html#setControlPoints">setControlPoints</a>() and <a href="q3canvasspline.html#closed">closed</a>().</p> <!-- @@@controlPoints --> <!-- $$$rtti[overload1]$$$rtti --> <h3 class="fn"><a name="rtti"></a><span class="type">int</span> Q3CanvasSpline::<span class="name">rtti</span> () const<tt> [virtual]</tt></h3> <p>Reimplemented from <a href="q3canvasitem.html#rtti">Q3CanvasItem::rtti</a>().</p> <p>Returns 8 (<a href="q3canvasitem.html#RttiValues-enum">Q3CanvasItem::Rtti_Spline</a>).</p> <p><b>See also </b><a href="q3canvasitem.html#rtti">Q3CanvasItem::rtti</a>().</p> <!-- @@@rtti --> <!-- $$$setControlPoints[overload1]$$$setControlPointsQ3PointArraybool --> <h3 class="fn"><a name="setControlPoints"></a><span class="type">void</span> Q3CanvasSpline::<span class="name">setControlPoints</span> ( <span class="type"><a href="q3pointarray.html">Q3PointArray</a></span> <i>ctrl</i>, <span class="type">bool</span> <i>close</i> = true )</h3> <p>Set the spline control points to <i>ctrl</i>.</p> <p>If <i>close</i> is true, then the first point in <i>ctrl</i> will be re-used as the last point, and the number of control points must be a multiple of 3. If <i>close</i> is false, one additional control point is required, and the number of control points must be one of (4, 7, 10, 13, ...).</p> <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> <p><b>See also </b><a href="q3canvasspline.html#controlPoints">controlPoints</a>().</p> <!-- @@@setControlPoints --> </div> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2013 Digia Plc and/or its subsidiaries. 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