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<p>Canvas of a <a class="el" href="class_qwt_polar_plot.html" title="A plotting widget, displaying a polar coordinate system. ">QwtPolarPlot</a>.  
 <a href="class_qwt_polar_canvas.html#details">More...</a></p>

<p><code>#include &lt;<a class="el" href="qwt__polar__canvas_8h_source.html">qwt_polar_canvas.h</a>&gt;</code></p>
<div class="dynheader">
Inheritance diagram for QwtPolarCanvas:</div>
<div class="dyncontent">
<div class="center"><img src="class_qwt_polar_canvas__inherit__graph.png" border="0" usemap="#_qwt_polar_canvas_inherit__map" alt="Inheritance graph"/></div>
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</map>
<center><span class="legend">[<a href="graph_legend.html">legend</a>]</span></center></div>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-types"></a>
Public Types</h2></td></tr>
<tr class="memitem:a371f88face8daaac6cd556e5f7596613"><td class="memItemLeft" align="right" valign="top">enum &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_polar_canvas.html#a371f88face8daaac6cd556e5f7596613">PaintAttribute</a> { <a class="el" href="class_qwt_polar_canvas.html#a371f88face8daaac6cd556e5f7596613ab8c07aaa7ba2c8833fd4d0cfd9955829">BackingStore</a> = 0x01
 }</td></tr>
<tr class="memdesc:a371f88face8daaac6cd556e5f7596613"><td class="mdescLeft">&#160;</td><td class="mdescRight">Paint attributes.  <a href="class_qwt_polar_canvas.html#a371f88face8daaac6cd556e5f7596613">More...</a><br/></td></tr>
<tr class="separator:a371f88face8daaac6cd556e5f7596613"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ab66cc45b0cc79958d180be66e08c8202"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ab66cc45b0cc79958d180be66e08c8202"></a>
typedef QFlags&lt; <a class="el" href="class_qwt_polar_canvas.html#a371f88face8daaac6cd556e5f7596613">PaintAttribute</a> &gt;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_polar_canvas.html#ab66cc45b0cc79958d180be66e08c8202">PaintAttributes</a></td></tr>
<tr class="memdesc:ab66cc45b0cc79958d180be66e08c8202"><td class="mdescLeft">&#160;</td><td class="mdescRight">Paint attributes. <br/></td></tr>
<tr class="separator:ab66cc45b0cc79958d180be66e08c8202"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:aa5f39d822a71e056b4735da113a0a4e5"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="aa5f39d822a71e056b4735da113a0a4e5"></a>
&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_polar_canvas.html#aa5f39d822a71e056b4735da113a0a4e5">QwtPolarCanvas</a> (<a class="el" href="class_qwt_polar_plot.html">QwtPolarPlot</a> *)</td></tr>
<tr class="memdesc:aa5f39d822a71e056b4735da113a0a4e5"><td class="mdescLeft">&#160;</td><td class="mdescRight">Constructor. <br/></td></tr>
<tr class="separator:aa5f39d822a71e056b4735da113a0a4e5"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aaf0b8442dc8b32353d7705c9dcc28bc0"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="aaf0b8442dc8b32353d7705c9dcc28bc0"></a>
virtual&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_polar_canvas.html#aaf0b8442dc8b32353d7705c9dcc28bc0">~QwtPolarCanvas</a> ()</td></tr>
<tr class="memdesc:aaf0b8442dc8b32353d7705c9dcc28bc0"><td class="mdescLeft">&#160;</td><td class="mdescRight">Destructor. <br/></td></tr>
<tr class="separator:aaf0b8442dc8b32353d7705c9dcc28bc0"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a2f3dc31a8c28390e3a7ec13cab60250e"><td class="memItemLeft" align="right" valign="top"><a class="el" href="class_qwt_polar_plot.html">QwtPolarPlot</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_polar_canvas.html#a2f3dc31a8c28390e3a7ec13cab60250e">plot</a> ()</td></tr>
<tr class="separator:a2f3dc31a8c28390e3a7ec13cab60250e"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a5dbeb0e16e24c256825a51a1a92d4162"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="class_qwt_polar_plot.html">QwtPolarPlot</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_polar_canvas.html#a5dbeb0e16e24c256825a51a1a92d4162">plot</a> () const </td></tr>
<tr class="separator:a5dbeb0e16e24c256825a51a1a92d4162"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ae7010120b9f6905bd31f748775c80b6c"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_polar_canvas.html#ae7010120b9f6905bd31f748775c80b6c">setPaintAttribute</a> (<a class="el" href="class_qwt_polar_canvas.html#a371f88face8daaac6cd556e5f7596613">PaintAttribute</a>, bool on=true)</td></tr>
<tr class="memdesc:ae7010120b9f6905bd31f748775c80b6c"><td class="mdescLeft">&#160;</td><td class="mdescRight">Changing the paint attributes.  <a href="#ae7010120b9f6905bd31f748775c80b6c">More...</a><br/></td></tr>
<tr class="separator:ae7010120b9f6905bd31f748775c80b6c"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aaf6c538d5c26945df4dbbc2121f4d859"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_polar_canvas.html#aaf6c538d5c26945df4dbbc2121f4d859">testPaintAttribute</a> (<a class="el" href="class_qwt_polar_canvas.html#a371f88face8daaac6cd556e5f7596613">PaintAttribute</a>) const </td></tr>
<tr class="separator:aaf6c538d5c26945df4dbbc2121f4d859"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a8e40bb677f005bd25c62e65e3e4c8282"><td class="memItemLeft" align="right" valign="top">const QPixmap *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_polar_canvas.html#a8e40bb677f005bd25c62e65e3e4c8282">backingStore</a> () const </td></tr>
<tr class="separator:a8e40bb677f005bd25c62e65e3e4c8282"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a4afef808e10242a83a26f4b856aa4cef"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a4afef808e10242a83a26f4b856aa4cef"></a>
void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_polar_canvas.html#a4afef808e10242a83a26f4b856aa4cef">invalidateBackingStore</a> ()</td></tr>
<tr class="memdesc:a4afef808e10242a83a26f4b856aa4cef"><td class="mdescLeft">&#160;</td><td class="mdescRight">Invalidate the internal backing store. <br/></td></tr>
<tr class="separator:a4afef808e10242a83a26f4b856aa4cef"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ae96812128c317a1ab4cd13df0f94bbf3"><td class="memItemLeft" align="right" valign="top">QwtPointPolar&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_polar_canvas.html#ae96812128c317a1ab4cd13df0f94bbf3">invTransform</a> (const QPoint &amp;) const </td></tr>
<tr class="separator:ae96812128c317a1ab4cd13df0f94bbf3"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a2c2d37fcec08147c1ef2e862dd3edbee"><td class="memItemLeft" align="right" valign="top">QPoint&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_polar_canvas.html#a2c2d37fcec08147c1ef2e862dd3edbee">transform</a> (const QwtPointPolar &amp;) const </td></tr>
<tr class="separator:a2c2d37fcec08147c1ef2e862dd3edbee"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pro-methods"></a>
Protected Member Functions</h2></td></tr>
<tr class="memitem:ab8718969291c05c56050f9500da212ad"><td class="memItemLeft" align="right" valign="top">virtual void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_polar_canvas.html#ab8718969291c05c56050f9500da212ad">paintEvent</a> (QPaintEvent *)</td></tr>
<tr class="separator:ab8718969291c05c56050f9500da212ad"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aa3418bc87d68888ac73c70e52a476c27"><td class="memItemLeft" align="right" valign="top">virtual void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_polar_canvas.html#aa3418bc87d68888ac73c70e52a476c27">resizeEvent</a> (QResizeEvent *)</td></tr>
<tr class="separator:aa3418bc87d68888ac73c70e52a476c27"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Canvas of a <a class="el" href="class_qwt_polar_plot.html" title="A plotting widget, displaying a polar coordinate system. ">QwtPolarPlot</a>. </p>
<p>The canvas is the widget, where all polar items are painted to.</p>
<dl class="section note"><dt>Note</dt><dd>In opposite to QwtPlot all axes are painted on the canvas. </dd></dl>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="class_qwt_polar_plot.html" title="A plotting widget, displaying a polar coordinate system. ">QwtPolarPlot</a> </dd></dl>
</div><h2 class="groupheader">Member Enumeration Documentation</h2>
<a class="anchor" id="a371f88face8daaac6cd556e5f7596613"></a>
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">enum <a class="el" href="class_qwt_polar_canvas.html#a371f88face8daaac6cd556e5f7596613">QwtPolarCanvas::PaintAttribute</a></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Paint attributes. </p>
<p>The default setting enables BackingStore</p>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="class_qwt_polar_canvas.html#ae7010120b9f6905bd31f748775c80b6c" title="Changing the paint attributes. ">setPaintAttribute()</a>, <a class="el" href="class_qwt_polar_canvas.html#aaf6c538d5c26945df4dbbc2121f4d859">testPaintAttribute()</a>, <a class="el" href="class_qwt_polar_canvas.html#a8e40bb677f005bd25c62e65e3e4c8282">backingStore()</a> </dd></dl>
<table class="fieldtable">
<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><em><a class="anchor" id="a371f88face8daaac6cd556e5f7596613ab8c07aaa7ba2c8833fd4d0cfd9955829"></a>BackingStore</em>&nbsp;</td><td class="fielddoc">
<p>Paint double buffered and reuse the content of the pixmap buffer for some spontaneous repaints that happen when a plot gets unhidden, deiconified or changes the focus. </p>
</td></tr>
</table>

</div>
</div>
<h2 class="groupheader">Member Function Documentation</h2>
<a class="anchor" id="a8e40bb677f005bd25c62e65e3e4c8282"></a>
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">const QPixmap * QwtPolarCanvas::backingStore </td>
          <td>(</td>
          <td class="paramname"></td><td>)</td>
          <td> const</td>
        </tr>
      </table>
</div><div class="memdoc">
<dl class="section return"><dt>Returns</dt><dd>Backing store, might be null </dd></dl>

</div>
</div>
<a class="anchor" id="ae96812128c317a1ab4cd13df0f94bbf3"></a>
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">QwtPointPolar QwtPolarCanvas::invTransform </td>
          <td>(</td>
          <td class="paramtype">const QPoint &amp;&#160;</td>
          <td class="paramname"><em>pos</em></td><td>)</td>
          <td> const</td>
        </tr>
      </table>
</div><div class="memdoc">
<p>Translate a point from widget into plot coordinates</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">pos</td><td>Point in widget coordinates of the plot canvas </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>Point in plot coordinates</dd></dl>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="class_qwt_polar_canvas.html#a2c2d37fcec08147c1ef2e862dd3edbee">transform()</a> </dd></dl>

</div>
</div>
<a class="anchor" id="ab8718969291c05c56050f9500da212ad"></a>
<div class="memitem">
<div class="memproto">
<table class="mlabels">
  <tr>
  <td class="mlabels-left">
      <table class="memname">
        <tr>
          <td class="memname">void QwtPolarCanvas::paintEvent </td>
          <td>(</td>
          <td class="paramtype">QPaintEvent *&#160;</td>
          <td class="paramname"><em>event</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
  </td>
  <td class="mlabels-right">
<span class="mlabels"><span class="mlabel">protected</span><span class="mlabel">virtual</span></span>  </td>
  </tr>
</table>
</div><div class="memdoc">
<p>Paint event </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">event</td><td>Paint event </td></tr>
  </table>
  </dd>
</dl>

</div>
</div>
<a class="anchor" id="a2f3dc31a8c28390e3a7ec13cab60250e"></a>
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname"><a class="el" href="class_qwt_polar_plot.html">QwtPolarPlot</a> * QwtPolarCanvas::plot </td>
          <td>(</td>
          <td class="paramname"></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">
<dl class="section return"><dt>Returns</dt><dd>Parent plot widget </dd></dl>

</div>
</div>
<a class="anchor" id="a5dbeb0e16e24c256825a51a1a92d4162"></a>
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">const <a class="el" href="class_qwt_polar_plot.html">QwtPolarPlot</a> * QwtPolarCanvas::plot </td>
          <td>(</td>
          <td class="paramname"></td><td>)</td>
          <td> const</td>
        </tr>
      </table>
</div><div class="memdoc">
<dl class="section return"><dt>Returns</dt><dd>Parent plot widget </dd></dl>

</div>
</div>
<a class="anchor" id="aa3418bc87d68888ac73c70e52a476c27"></a>
<div class="memitem">
<div class="memproto">
<table class="mlabels">
  <tr>
  <td class="mlabels-left">
      <table class="memname">
        <tr>
          <td class="memname">void QwtPolarCanvas::resizeEvent </td>
          <td>(</td>
          <td class="paramtype">QResizeEvent *&#160;</td>
          <td class="paramname"><em>event</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
  </td>
  <td class="mlabels-right">
<span class="mlabels"><span class="mlabel">protected</span><span class="mlabel">virtual</span></span>  </td>
  </tr>
</table>
</div><div class="memdoc">
<p>Resize event </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">event</td><td>Resize event </td></tr>
  </table>
  </dd>
</dl>

</div>
</div>
<a class="anchor" id="ae7010120b9f6905bd31f748775c80b6c"></a>
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          <td class="memname">void QwtPolarCanvas::setPaintAttribute </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="class_qwt_polar_canvas.html#a371f88face8daaac6cd556e5f7596613">PaintAttribute</a>&#160;</td>
          <td class="paramname"><em>attribute</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">bool&#160;</td>
          <td class="paramname"><em>on</em> = <code>true</code>&#160;</td>
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          <td></td>
          <td>)</td>
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<p>Changing the paint attributes. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">attribute</td><td>Paint attribute </td></tr>
    <tr><td class="paramname">on</td><td>On/Off</td></tr>
  </table>
  </dd>
</dl>
<p>The default setting enables BackingStore</p>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="class_qwt_polar_canvas.html#aaf6c538d5c26945df4dbbc2121f4d859">testPaintAttribute()</a>, paintCache() </dd></dl>

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          <td class="memname">bool QwtPolarCanvas::testPaintAttribute </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="class_qwt_polar_canvas.html#a371f88face8daaac6cd556e5f7596613">PaintAttribute</a>&#160;</td>
          <td class="paramname"><em>attribute</em></td><td>)</td>
          <td> const</td>
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<p>Test wether a paint attribute is enabled</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">attribute</td><td>Paint attribute </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>true if the attribute is enabled </dd></dl>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="class_qwt_polar_canvas.html#ae7010120b9f6905bd31f748775c80b6c" title="Changing the paint attributes. ">setPaintAttribute()</a> </dd></dl>

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          <td class="memname">QPoint QwtPolarCanvas::transform </td>
          <td>(</td>
          <td class="paramtype">const QwtPointPolar &amp;&#160;</td>
          <td class="paramname"><em>polarPos</em></td><td>)</td>
          <td> const</td>
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<p>Translate a point from plot into widget coordinates</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">polarPos</td><td>Point in plot coordinates </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>Point in widget coordinates </dd></dl>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="class_qwt_polar_canvas.html#a2c2d37fcec08147c1ef2e862dd3edbee">transform()</a> </dd></dl>

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