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<div class="title">qwt_sampling_thread.cpp</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/******************************************************************************</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Qwt Widget Library</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * Copyright (C) 1997 Josef Wilgen</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * Copyright (C) 2002 Uwe Rathmann</span></div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> *</span></div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * This library is free software; you can redistribute it and/or</span></div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * modify it under the terms of the Qwt License, Version 1.0</span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> *****************************************************************************/</span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>  </div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include "qwt_sampling_thread.h"</span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include <qelapsedtimer.h></span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>  </div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="keyword">class </span>QwtSamplingThread::PrivateData</div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> {</div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>  <span class="keyword">public</span>:</div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>  QElapsedTimer timer;</div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>  <span class="keywordtype">double</span> msecsInterval;</div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> };</div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  </div>
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<div class="line"><a name="l00021"></a><span class="lineno"><a class="line" href="class_qwt_sampling_thread.html#afb02e4696306d5211b4b6470410afbfc"> 21</a></span> <a class="code" href="class_qwt_sampling_thread.html#afb02e4696306d5211b4b6470410afbfc">QwtSamplingThread::QwtSamplingThread</a>( QObject* parent )</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  : QThread( parent )</div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> {</div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  m_data = <span class="keyword">new</span> PrivateData;</div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  m_data->msecsInterval = 1e3; <span class="comment">// 1 second</span></div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> }</div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  </div>
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<div class="line"><a name="l00029"></a><span class="lineno"><a class="line" href="class_qwt_sampling_thread.html#a7a0b4d5c172f2ded5f6b6483c6ab56e5"> 29</a></span> <a class="code" href="class_qwt_sampling_thread.html#a7a0b4d5c172f2ded5f6b6483c6ab56e5">QwtSamplingThread::~QwtSamplingThread</a>()</div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> {</div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="keyword">delete</span> m_data;</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> }</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  </div>
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<div class="line"><a name="l00041"></a><span class="lineno"><a class="line" href="class_qwt_sampling_thread.html#a36c56404ef0042cf52f1e592edf94f5d"> 41</a></span> <span class="keywordtype">void</span> <a class="code" href="class_qwt_sampling_thread.html#a36c56404ef0042cf52f1e592edf94f5d">QwtSamplingThread::setInterval</a>( <span class="keywordtype">double</span> msecs )</div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> {</div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keywordflow">if</span> ( msecs < 0.0 )</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  msecs = 0.0;</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  </div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  m_data->msecsInterval = msecs;</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> }</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  </div>
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<div class="line"><a name="l00053"></a><span class="lineno"><a class="line" href="class_qwt_sampling_thread.html#a4fd7b7df98159bb0daddab7709674991"> 53</a></span> <span class="keywordtype">double</span> <a class="code" href="class_qwt_sampling_thread.html#a4fd7b7df98159bb0daddab7709674991">QwtSamplingThread::interval</a>()<span class="keyword"> const</span></div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="keyword"></span>{</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordflow">return</span> m_data->msecsInterval;</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> }</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  </div>
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<div class="line"><a name="l00062"></a><span class="lineno"><a class="line" href="class_qwt_sampling_thread.html#a34514c4cd9b99228a150f002ac422771"> 62</a></span> <span class="keywordtype">double</span> <a class="code" href="class_qwt_sampling_thread.html#a34514c4cd9b99228a150f002ac422771">QwtSamplingThread::elapsed</a>()<span class="keyword"> const</span></div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="keyword"></span>{</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordflow">if</span> ( m_data->timer.isValid() )</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keywordflow">return</span> m_data->timer.nsecsElapsed() / 1e6;</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  </div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keywordflow">return</span> 0.0;</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> }</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  </div>
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<div class="line"><a name="l00074"></a><span class="lineno"><a class="line" href="class_qwt_sampling_thread.html#ac644ff417342617a39dbd86e50d09132"> 74</a></span> <span class="keywordtype">void</span> <a class="code" href="class_qwt_sampling_thread.html#ac644ff417342617a39dbd86e50d09132">QwtSamplingThread::stop</a>()</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> {</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  m_data->timer.invalidate();</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> }</div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  </div>
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<div class="line"><a name="l00083"></a><span class="lineno"><a class="line" href="class_qwt_sampling_thread.html#a08926a89be00fcccb0789ed24a56412c"> 83</a></span> <span class="keywordtype">void</span> <a class="code" href="class_qwt_sampling_thread.html#a08926a89be00fcccb0789ed24a56412c">QwtSamplingThread::run</a>()</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> {</div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  m_data->timer.start();</div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  </div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="comment">/*</span></div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="comment"> We should have all values in nsecs/qint64, but</span></div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="comment"> this would break existing code. TODO ...</span></div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="comment"> Anyway - for QThread::usleep we even need microseconds( usecs )</span></div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="comment"> */</span></div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordflow">while</span> ( m_data->timer.isValid() )</div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  {</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keyword">const</span> qint64 timestamp = m_data->timer.nsecsElapsed();</div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <a class="code" href="class_qwt_sampling_thread.html#a67c4a524736808dc1ba3b81670c0cbd5">sample</a>( timestamp / 1e9 ); <span class="comment">// seconds</span></div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  </div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keywordflow">if</span> ( m_data->msecsInterval > 0.0 )</div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  {</div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keyword">const</span> <span class="keywordtype">double</span> <a class="code" href="class_qwt_sampling_thread.html#a4fd7b7df98159bb0daddab7709674991">interval</a> = m_data->msecsInterval * 1e3;</div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keyword">const</span> <span class="keywordtype">double</span> <a class="code" href="class_qwt_sampling_thread.html#a34514c4cd9b99228a150f002ac422771">elapsed</a> = ( m_data->timer.nsecsElapsed() - timestamp ) / 1e3;</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  </div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keyword">const</span> <span class="keywordtype">double</span> usecs = <a class="code" href="class_qwt_sampling_thread.html#a4fd7b7df98159bb0daddab7709674991">interval</a> - <a class="code" href="class_qwt_sampling_thread.html#a34514c4cd9b99228a150f002ac422771">elapsed</a>;</div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  </div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keywordflow">if</span> ( usecs > 0.0 )</div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  QThread::usleep( qRound( usecs ) );</div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  }</div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  }</div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> }</div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  </div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="preprocessor">#if QWT_MOC_INCLUDE</span></div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="preprocessor">#include "moc_qwt_sampling_thread.cpp"</span></div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="preprocessor">#endif</span></div>
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<div class="ttc" id="aclass_qwt_sampling_thread_html_a08926a89be00fcccb0789ed24a56412c"><div class="ttname"><a href="class_qwt_sampling_thread.html#a08926a89be00fcccb0789ed24a56412c">QwtSamplingThread::run</a></div><div class="ttdeci">virtual void run() override</div><div class="ttdef"><b>Definition:</b> <a href="qwt__sampling__thread_8cpp_source.html#l00083">qwt_sampling_thread.cpp:83</a></div></div>
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<div class="ttc" id="aclass_qwt_sampling_thread_html_a34514c4cd9b99228a150f002ac422771"><div class="ttname"><a href="class_qwt_sampling_thread.html#a34514c4cd9b99228a150f002ac422771">QwtSamplingThread::elapsed</a></div><div class="ttdeci">double elapsed() const</div><div class="ttdef"><b>Definition:</b> <a href="qwt__sampling__thread_8cpp_source.html#l00062">qwt_sampling_thread.cpp:62</a></div></div>
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<div class="ttc" id="aclass_qwt_sampling_thread_html_a36c56404ef0042cf52f1e592edf94f5d"><div class="ttname"><a href="class_qwt_sampling_thread.html#a36c56404ef0042cf52f1e592edf94f5d">QwtSamplingThread::setInterval</a></div><div class="ttdeci">void setInterval(double interval)</div><div class="ttdef"><b>Definition:</b> <a href="qwt__sampling__thread_8cpp_source.html#l00041">qwt_sampling_thread.cpp:41</a></div></div>
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<div class="ttc" id="aclass_qwt_sampling_thread_html_a4fd7b7df98159bb0daddab7709674991"><div class="ttname"><a href="class_qwt_sampling_thread.html#a4fd7b7df98159bb0daddab7709674991">QwtSamplingThread::interval</a></div><div class="ttdeci">double interval() const</div><div class="ttdef"><b>Definition:</b> <a href="qwt__sampling__thread_8cpp_source.html#l00053">qwt_sampling_thread.cpp:53</a></div></div>
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<div class="ttc" id="aclass_qwt_sampling_thread_html_a67c4a524736808dc1ba3b81670c0cbd5"><div class="ttname"><a href="class_qwt_sampling_thread.html#a67c4a524736808dc1ba3b81670c0cbd5">QwtSamplingThread::sample</a></div><div class="ttdeci">virtual void sample(double elapsed)=0</div></div>
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<div class="ttc" id="aclass_qwt_sampling_thread_html_a7a0b4d5c172f2ded5f6b6483c6ab56e5"><div class="ttname"><a href="class_qwt_sampling_thread.html#a7a0b4d5c172f2ded5f6b6483c6ab56e5">QwtSamplingThread::~QwtSamplingThread</a></div><div class="ttdeci">virtual ~QwtSamplingThread()</div><div class="ttdoc">Destructor.</div><div class="ttdef"><b>Definition:</b> <a href="qwt__sampling__thread_8cpp_source.html#l00029">qwt_sampling_thread.cpp:29</a></div></div>
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<div class="ttc" id="aclass_qwt_sampling_thread_html_ac644ff417342617a39dbd86e50d09132"><div class="ttname"><a href="class_qwt_sampling_thread.html#ac644ff417342617a39dbd86e50d09132">QwtSamplingThread::stop</a></div><div class="ttdeci">void stop()</div><div class="ttdef"><b>Definition:</b> <a href="qwt__sampling__thread_8cpp_source.html#l00074">qwt_sampling_thread.cpp:74</a></div></div>
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<div class="ttc" id="aclass_qwt_sampling_thread_html_afb02e4696306d5211b4b6470410afbfc"><div class="ttname"><a href="class_qwt_sampling_thread.html#afb02e4696306d5211b4b6470410afbfc">QwtSamplingThread::QwtSamplingThread</a></div><div class="ttdeci">QwtSamplingThread(QObject *parent=NULL)</div><div class="ttdoc">Constructor.</div><div class="ttdef"><b>Definition:</b> <a href="qwt__sampling__thread_8cpp_source.html#l00021">qwt_sampling_thread.cpp:21</a></div></div>
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