Peter M. Groen / openbr

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<title>Qwt User&#39;s Guide: QwtCPointerData Class Reference</title>
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<a href="#pub-methods">Public Member Functions</a> &#124;
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<h1>QwtCPointerData Class Reference</h1>  </div>
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<!-- doxytag: class="QwtCPointerData" --><!-- doxytag: inherits="QwtSeriesData&lt; QPointF &gt;" -->
<p>Data class containing two pointers to memory blocks of doubles.  
<a href="#_details">More...</a></p>

<p><code>#include &lt;<a class="el" href="qwt__series__data_8h_source.html">qwt_series_data.h</a>&gt;</code></p>
<div class="dynheader">
Inheritance diagram for QwtCPointerData:</div>
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<div class="center"><img src="class_qwt_c_pointer_data__inherit__graph.png" border="0" usemap="#_qwt_c_pointer_data_inherit__map" alt="Inheritance graph"/></div>
<map name="_qwt_c_pointer_data_inherit__map" id="_qwt_c_pointer_data_inherit__map">
<area shape="rect" id="node2" href="class_qwt_series_data.html" title="QwtSeriesData\&lt; QPointF \&gt;" alt="" coords="5,101,187,131"/><area shape="rect" id="node4" href="class_qwt_series_data.html" title="Abstract interface for iterating over samples." alt="" coords="27,5,165,35"/></map>
<center><span class="legend">[<a href="graph_legend.html">legend</a>]</span></center></div>

<p><a href="class_qwt_c_pointer_data-members.html">List of all members.</a></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual QRectF&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_c_pointer_data.html#aecc3e98a3b2c4350212fa7b9e97110aa">boundingRect</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_c_pointer_data.html#a795b86d69226d1aabf9356848da6c083">QwtCPointerData</a> (const double *x, const double *y, size_t size)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual QPointF&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_c_pointer_data.html#a5e01b287eca7d0c4b52bbf514c5244d2">sample</a> (size_t i) const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a81466c72589c03310543d17e1f1d0ab7"></a><!-- doxytag: member="QwtCPointerData::setRectOfInterest" ref="a81466c72589c03310543d17e1f1d0ab7" args="(const QRectF &amp;)" -->
virtual void&#160;</td><td class="memItemRight" valign="bottom"><b>setRectOfInterest</b> (const QRectF &amp;)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual size_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_c_pointer_data.html#a780b9ae434856509cef9bbe954f03a3e">size</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">const double *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_c_pointer_data.html#a6409b0bcf77674d1970185c6c3245e26">xData</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">const double *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_c_pointer_data.html#a7c538ed7b3e4cc5db6d4d97c09ed9d73">yData</a> () const </td></tr>
<tr><td colspan="2"><h2><a name="pro-attribs"></a>
Protected Attributes</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QRectF&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_series_data.html#a24fbbcb0baa0c728117d2e6764d00414">d_boundingRect</a></td></tr>
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<hr/><a name="_details"></a><h2>Detailed Description</h2>
<div class="textblock"><p>Data class containing two pointers to memory blocks of doubles. </p>
</div><hr/><h2>Constructor &amp; Destructor Documentation</h2>
<a class="anchor" id="a795b86d69226d1aabf9356848da6c083"></a><!-- doxytag: member="QwtCPointerData::QwtCPointerData" ref="a795b86d69226d1aabf9356848da6c083" args="(const double *x, const double *y, size_t size)" -->
<div class="memitem">
<div class="memproto">
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          <td class="memname">QwtCPointerData::QwtCPointerData </td>
          <td>(</td>
          <td class="paramtype">const double *&#160;</td>
          <td class="paramname"><em>x</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">const double *&#160;</td>
          <td class="paramname"><em>y</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">size_t&#160;</td>
          <td class="paramname"><em>size</em>&#160;</td>
        </tr>
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          <td></td>
          <td>)</td>
          <td></td><td></td>
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<p>Constructor</p>
<dl><dt><b>Parameters:</b></dt><dd>
  <table class="params">
    <tr><td class="paramname">x</td><td>Array of x values </td></tr>
    <tr><td class="paramname">y</td><td>Array of y values </td></tr>
    <tr><td class="paramname">size</td><td>Size of the x and y arrays</td></tr>
  </table>
  </dd>
</dl>
<dl class="warning"><dt><b>Warning:</b></dt><dd>The programmer must assure that the memory blocks referenced by the pointers remain valid during the lifetime of the QwtPlotCPointer object.</dd></dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_plot_series_item.html#adba072515f7c71c923985882129878c4">QwtPlotCurve::setData()</a>, <a class="el" href="class_qwt_plot_curve.html#afd13c94e23520dacbc37b4d0fd036a8b" title="Initialize the data by pointing to memory blocks which are not managed by QwtPlotCurve.">QwtPlotCurve::setRawSamples()</a> </dd></dl>

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<hr/><h2>Member Function Documentation</h2>
<a class="anchor" id="aecc3e98a3b2c4350212fa7b9e97110aa"></a><!-- doxytag: member="QwtCPointerData::boundingRect" ref="aecc3e98a3b2c4350212fa7b9e97110aa" args="() const " -->
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          <td class="memname">QRectF QwtCPointerData::boundingRect </td>
          <td>(</td>
          <td class="paramname"></td><td>)</td>
          <td> const<code> [virtual]</code></td>
        </tr>
      </table>
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<p>Calculate the bounding rect. </p>
<p>The bounding rectangle is calculated once by iterating over all points and is stored for all following requests.</p>
<dl class="return"><dt><b>Returns:</b></dt><dd>Bounding rectangle </dd></dl>

<p>Implements <a class="el" href="class_qwt_series_data.html#aedb969ba51a27d88d26ad7f7cb1c2c7f">QwtSeriesData&lt; QPointF &gt;</a>.</p>

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<a class="anchor" id="a5e01b287eca7d0c4b52bbf514c5244d2"></a><!-- doxytag: member="QwtCPointerData::sample" ref="a5e01b287eca7d0c4b52bbf514c5244d2" args="(size_t i) const " -->
<div class="memitem">
<div class="memproto">
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          <td class="memname">QPointF QwtCPointerData::sample </td>
          <td>(</td>
          <td class="paramtype">size_t&#160;</td>
          <td class="paramname"><em>i</em></td><td>)</td>
          <td> const<code> [virtual]</code></td>
        </tr>
      </table>
</div>
<div class="memdoc">
<p>Return the sample at position i</p>
<dl><dt><b>Parameters:</b></dt><dd>
  <table class="params">
    <tr><td class="paramname">i</td><td>Index </td></tr>
  </table>
  </dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>Sample at position i </dd></dl>

<p>Implements <a class="el" href="class_qwt_series_data.html#ae8650d16c07c58f01897ab48658a3266">QwtSeriesData&lt; QPointF &gt;</a>.</p>

</div>
</div>
<a class="anchor" id="a780b9ae434856509cef9bbe954f03a3e"></a><!-- doxytag: member="QwtCPointerData::size" ref="a780b9ae434856509cef9bbe954f03a3e" args="() const " -->
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">size_t QwtCPointerData::size </td>
          <td>(</td>
          <td class="paramname"></td><td>)</td>
          <td> const<code> [virtual]</code></td>
        </tr>
      </table>
</div>
<div class="memdoc">
<dl class="return"><dt><b>Returns:</b></dt><dd>Size of the data set </dd></dl>

<p>Implements <a class="el" href="class_qwt_series_data.html#a3cfe5b26fc55a887ac85b0103ae80a3e">QwtSeriesData&lt; QPointF &gt;</a>.</p>

</div>
</div>
<a class="anchor" id="a6409b0bcf77674d1970185c6c3245e26"></a><!-- doxytag: member="QwtCPointerData::xData" ref="a6409b0bcf77674d1970185c6c3245e26" args="() const " -->
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">const double * QwtCPointerData::xData </td>
          <td>(</td>
          <td class="paramname"></td><td>)</td>
          <td> const</td>
        </tr>
      </table>
</div>
<div class="memdoc">
<dl class="return"><dt><b>Returns:</b></dt><dd>Array of the x-values </dd></dl>

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<a class="anchor" id="a7c538ed7b3e4cc5db6d4d97c09ed9d73"></a><!-- doxytag: member="QwtCPointerData::yData" ref="a7c538ed7b3e4cc5db6d4d97c09ed9d73" args="() const " -->
<div class="memitem">
<div class="memproto">
      <table class="memname">
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          <td class="memname">const double * QwtCPointerData::yData </td>
          <td>(</td>
          <td class="paramname"></td><td>)</td>
          <td> const</td>
        </tr>
      </table>
</div>
<div class="memdoc">
<dl class="return"><dt><b>Returns:</b></dt><dd>Array of the y-values </dd></dl>

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</div>
<hr/><h2>Member Data Documentation</h2>
<a class="anchor" id="a24fbbcb0baa0c728117d2e6764d00414"></a><!-- doxytag: member="QwtCPointerData::d_boundingRect" ref="a24fbbcb0baa0c728117d2e6764d00414" args="" -->
<div class="memitem">
<div class="memproto">
      <table class="memname">
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          <td class="memname">QRectF <a class="el" href="class_qwt_series_data.html">QwtSeriesData</a>&lt; QPointF  &gt;::<a class="el" href="class_qwt_series_data.html#a24fbbcb0baa0c728117d2e6764d00414">d_boundingRect</a><code> [mutable, protected, inherited]</code></td>
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<p>Can be used to cache a calculated bounding rectangle. </p>

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