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  <div class="summary">
<a href="#pub-methods">Public Member Functions</a> &#124;
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<div class="title">QwtSeriesData&lt; T &gt; Class Template Reference<span class="mlabels"><span class="mlabel">abstract</span></span></div>  </div>
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<p>Abstract interface for iterating over samples.  
 <a href="class_qwt_series_data.html#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 QwtSeriesData&lt; T &gt;:</div>
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<area shape="rect" title="Abstract interface for iterating over samples." alt="" coords="21,5,164,32"/>
<area shape="rect" href="class_qwt_array_series_data.html" title="Template class for data, that is organized as QVector." alt="" coords="5,80,180,107"/>
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<table class="memberdecls">
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Public Member Functions</h2></td></tr>
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&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_series_data.html#a3f075340d18fb112a342d74716eb8d9c">QwtSeriesData</a> ()</td></tr>
<tr class="memdesc:a3f075340d18fb112a342d74716eb8d9c"><td class="mdescLeft">&#160;</td><td class="mdescRight">Constructor. <br /></td></tr>
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virtual&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_series_data.html#a841a56f909879d599a385b9c3d046745">~QwtSeriesData</a> ()</td></tr>
<tr class="memdesc:a841a56f909879d599a385b9c3d046745"><td class="mdescLeft">&#160;</td><td class="mdescRight">Destructor. <br /></td></tr>
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<tr class="memitem:a3cfe5b26fc55a887ac85b0103ae80a3e"><td class="memItemLeft" align="right" valign="top">virtual size_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_series_data.html#a3cfe5b26fc55a887ac85b0103ae80a3e">size</a> () const =0</td></tr>
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<tr class="memitem:ae8650d16c07c58f01897ab48658a3266"><td class="memItemLeft" align="right" valign="top">virtual T&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_series_data.html#ae8650d16c07c58f01897ab48658a3266">sample</a> (size_t i) const =0</td></tr>
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<tr class="memitem:aedb969ba51a27d88d26ad7f7cb1c2c7f"><td class="memItemLeft" align="right" valign="top">virtual QRectF&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_series_data.html#aedb969ba51a27d88d26ad7f7cb1c2c7f">boundingRect</a> () const =0</td></tr>
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<tr class="memitem:a391b4601a7454b2f9582fbc2662d108e"><td class="memItemLeft" align="right" valign="top">virtual void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_series_data.html#a391b4601a7454b2f9582fbc2662d108e">setRectOfInterest</a> (const QRectF &amp;rect)</td></tr>
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Protected Attributes</h2></td></tr>
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QRectF&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_series_data.html#a24fbbcb0baa0c728117d2e6764d00414">d_boundingRect</a></td></tr>
<tr class="memdesc:a24fbbcb0baa0c728117d2e6764d00414"><td class="mdescLeft">&#160;</td><td class="mdescRight">Can be used to cache a calculated bounding rectangle. <br /></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><h3>template&lt;typename T&gt;<br />
class QwtSeriesData&lt; T &gt;</h3>

<p>Abstract interface for iterating over samples. </p>
<p>Qwt offers several implementations of the <a class="el" href="class_qwt_series_data.html" title="Abstract interface for iterating over samples.">QwtSeriesData</a> API, but in situations, where data of an application specific format needs to be displayed, without having to copy it, it is recommended to implement an individual data access.</p>
<p>A subclass of <a class="el" href="class_qwt_series_data.html">QwtSeriesData&lt;QPointF&gt;</a> must implement:</p>
<ul>
<li><a class="el" href="class_qwt_series_data.html#a3cfe5b26fc55a887ac85b0103ae80a3e">size()</a><br  />
 Should return number of data points.</li>
<li><a class="el" href="class_qwt_series_data.html#ae8650d16c07c58f01897ab48658a3266">sample()</a><br  />
 Should return values x and y values of the sample at specific position as QPointF object.</li>
<li><a class="el" href="class_qwt_series_data.html#aedb969ba51a27d88d26ad7f7cb1c2c7f">boundingRect()</a><br  />
 Should return the bounding rectangle of the data series. It is used for autoscaling and might help certain algorithms for displaying the data. You can use qwtBoundingRect() for an implementation but often it is possible to implement a more efficient algorithm depending on the characteristics of the series. The member d_boundingRect is intended for caching the calculated rectangle. </li>
</ul>
</div><h2 class="groupheader">Member Function Documentation</h2>
<a id="aedb969ba51a27d88d26ad7f7cb1c2c7f"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aedb969ba51a27d88d26ad7f7cb1c2c7f">&#9670;&nbsp;</a></span>boundingRect()</h2>

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          <td class="memname">virtual QRectF <a class="el" href="class_qwt_series_data.html">QwtSeriesData</a>&lt; T &gt;::boundingRect </td>
          <td>(</td>
          <td class="paramname"></td><td>)</td>
          <td> const</td>
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<p>Calculate the bounding rect of all samples</p>
<p>The bounding rect is necessary for autoscaling and can be used for a couple of painting optimizations.</p>
<p>qwtBoundingRect(...) offers slow implementations iterating over the samples. For large sets it is recommended to implement something faster f.e. by caching the bounding rectangle.</p>
<dl class="section return"><dt>Returns</dt><dd>Bounding rectangle </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#ae8650d16c07c58f01897ab48658a3266">&#9670;&nbsp;</a></span>sample()</h2>

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          <td class="memname">virtual T <a class="el" href="class_qwt_series_data.html">QwtSeriesData</a>&lt; T &gt;::sample </td>
          <td>(</td>
          <td class="paramtype">size_t&#160;</td>
          <td class="paramname"><em>i</em></td><td>)</td>
          <td> const</td>
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<p>Return a sample </p><dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">i</td><td>Index </td></tr>
  </table>
  </dd>
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<dl class="section return"><dt>Returns</dt><dd>Sample at position i </dd></dl>

<p>Implemented in <a class="el" href="class_qwt_array_series_data.html#a370320fa49b8056656b61f4df79b778b">QwtArraySeriesData&lt; T &gt;</a>, <a class="el" href="class_qwt_array_series_data.html#a370320fa49b8056656b61f4df79b778b">QwtArraySeriesData&lt; QwtIntervalSample &gt;</a>, <a class="el" href="class_qwt_array_series_data.html#a370320fa49b8056656b61f4df79b778b">QwtArraySeriesData&lt; QwtOHLCSample &gt;</a>, <a class="el" href="class_qwt_array_series_data.html#a370320fa49b8056656b61f4df79b778b">QwtArraySeriesData&lt; QPointF &gt;</a>, <a class="el" href="class_qwt_array_series_data.html#a370320fa49b8056656b61f4df79b778b">QwtArraySeriesData&lt; QwtPoint3D &gt;</a>, <a class="el" href="class_qwt_array_series_data.html#a370320fa49b8056656b61f4df79b778b">QwtArraySeriesData&lt; QwtSetSample &gt;</a>, <a class="el" href="class_qwt_synthetic_point_data.html#ac8be76b9c09c80fec51c978ad020aaec">QwtSyntheticPointData</a>, <a class="el" href="class_qwt_c_pointer_data.html#a7e6e149f5eadd13dd9ed5e1343f09527">QwtCPointerData</a>, and <a class="el" href="class_qwt_point_array_data.html#a10885ad1783151831a11f1cc659a98c5">QwtPointArrayData</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a391b4601a7454b2f9582fbc2662d108e">&#9670;&nbsp;</a></span>setRectOfInterest()</h2>

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          <td class="memname">void <a class="el" href="class_qwt_series_data.html">QwtSeriesData</a>&lt; T &gt;::setRectOfInterest </td>
          <td>(</td>
          <td class="paramtype">const QRectF &amp;&#160;</td>
          <td class="paramname"><em>rect</em></td><td>)</td>
          <td></td>
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<p>Set a the "rect of interest"</p>
<p><a class="el" href="class_qwt_plot_series_item.html" title="Base class for plot items representing a series of samples.">QwtPlotSeriesItem</a> defines the current area of the plot canvas as "rectangle of interest" ( <a class="el" href="class_qwt_plot_series_item.html#a890792d0f44e341812b5283c249608b2" title="Update the item to changes of the axes scale division.">QwtPlotSeriesItem::updateScaleDiv()</a> ). It can be used to implement different levels of details.</p>
<p>The default implementation does nothing.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">rect</td><td>Rectangle of interest </td></tr>
  </table>
  </dd>
</dl>

<p>Reimplemented in <a class="el" href="class_qwt_synthetic_point_data.html#a39cc8512e7d8beecde003f7781174b84">QwtSyntheticPointData</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a3cfe5b26fc55a887ac85b0103ae80a3e">&#9670;&nbsp;</a></span>size()</h2>

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          <td class="memname">virtual size_t <a class="el" href="class_qwt_series_data.html">QwtSeriesData</a>&lt; T &gt;::size </td>
          <td>(</td>
          <td class="paramname"></td><td>)</td>
          <td> const</td>
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<dl class="section return"><dt>Returns</dt><dd>Number of samples </dd></dl>

<p>Implemented in <a class="el" href="class_qwt_array_series_data.html#ab6cf4d74d9c429bd0479572659534cce">QwtArraySeriesData&lt; T &gt;</a>, <a class="el" href="class_qwt_array_series_data.html#ab6cf4d74d9c429bd0479572659534cce">QwtArraySeriesData&lt; QwtIntervalSample &gt;</a>, <a class="el" href="class_qwt_array_series_data.html#ab6cf4d74d9c429bd0479572659534cce">QwtArraySeriesData&lt; QwtOHLCSample &gt;</a>, <a class="el" href="class_qwt_array_series_data.html#ab6cf4d74d9c429bd0479572659534cce">QwtArraySeriesData&lt; QPointF &gt;</a>, <a class="el" href="class_qwt_array_series_data.html#ab6cf4d74d9c429bd0479572659534cce">QwtArraySeriesData&lt; QwtPoint3D &gt;</a>, and <a class="el" href="class_qwt_array_series_data.html#ab6cf4d74d9c429bd0479572659534cce">QwtArraySeriesData&lt; QwtSetSample &gt;</a>.</p>

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