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<li class="navelem"><a class="el" href="dir_dda9b7d7d71d59d5008f31cfd0fd7b60.html">Format</a></li> </ul>
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<div class="title">FormatCoordsUnitsStrategyAbstractBase.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><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * (C) 2014 markummitchell@github.com. This file is part of Engauge Digitizer, which is released *</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * under GNU General Public License version 2 (GPLv2) or (at your option) any later version. See file *</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * LICENSE or go to gnu.org/licenses for details. Distribution requires prior written permission. *</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> ******************************************************************************************************/</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> </div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#include "DocumentModelGeneral.h"</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#include "FormatCoordsUnitsStrategyAbstractBase.h"</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include "Logger.h"</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include <qmath.h></span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include "Transformation.h"</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> </div><div class="line"><a name="l00013"></a><span class="lineno"><a class="line" href="classFormatCoordsUnitsStrategyAbstractBase.html#a25115555df5f33dcc0f9c0457439fb8c"> 13</a></span> <a class="code" href="classFormatCoordsUnitsStrategyAbstractBase.html#a25115555df5f33dcc0f9c0457439fb8c">FormatCoordsUnitsStrategyAbstractBase::FormatCoordsUnitsStrategyAbstractBase</a> ()</div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> {</div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> }</div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> </div><div class="line"><a name="l00017"></a><span class="lineno"><a class="line" href="classFormatCoordsUnitsStrategyAbstractBase.html#a1018714c66d517f1196c3e413845e9d6"> 17</a></span> <span class="keywordtype">int</span> <a class="code" href="classFormatCoordsUnitsStrategyAbstractBase.html#a1018714c66d517f1196c3e413845e9d6">FormatCoordsUnitsStrategyAbstractBase::precisionDigitsForRawNumber</a> (<span class="keywordtype">double</span> valueUnformatted,</div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  <span class="keywordtype">double</span> valueUnformattedOther,</div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  <span class="keywordtype">bool</span> isXTheta,</div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  <span class="keyword">const</span> <a class="code" href="classDocumentModelGeneral.html">DocumentModelGeneral</a> &modelGeneral,</div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  <span class="keyword">const</span> <a class="code" href="classTransformation.html">Transformation</a> &transformation)<span class="keyword"> const</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="keyword"></span>{</div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  LOG4CPP_DEBUG_S ((*mainCat)) << <span class="stringliteral">"FormatCoordsUnitsStrategyAbstractBase::precisionDigitsForRawNumber"</span>;</div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  <span class="keyword">const</span> <span class="keywordtype">double</span> PIXEL_SHIFT = 1;</div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> DEFAULT_PRECISION = 5; <span class="comment">// Precision used before transformation is available. Equal or greater than x/y pixel counts</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> </div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  <span class="keywordflow">if</span> (transformation.<a class="code" href="classTransformation.html#aa4962ca8c4634378ab93723b5f403a25">transformIsDefined</a>()) {</div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> </div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <span class="comment">// Measure the resolution if the point is moved some number of pixels in screen coordinates</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  QPointF posGraph;</div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="keywordflow">if</span> (isXTheta) {</div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> </div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  posGraph = QPointF (valueUnformatted,</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  valueUnformattedOther);</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> </div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  posGraph = QPointF (valueUnformattedOther,</div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  valueUnformatted);</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  }</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> </div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  QPointF posScreen, posScreenShifted, posGraphShifted;</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> </div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  transformation.<a class="code" href="classTransformation.html#a481054677254f66d8685ea2e890d4b16">transformRawGraphToScreen</a> (posGraph,</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  posScreen);</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  posScreenShifted = posScreen + QPointF (PIXEL_SHIFT, PIXEL_SHIFT);</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> </div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  transformation.<a class="code" href="classTransformation.html#a52c9e6ea2fb295b91625779be3f3c444">transformScreenToRawGraph</a> (posScreenShifted,</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  posGraphShifted);</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> </div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keywordtype">double</span> xResolutionPerPixel = (posGraphShifted.x() - posGraph.x()) / PIXEL_SHIFT;</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordtype">double</span> yResolutionPerPixel = (posGraphShifted.y() - posGraph.y()) / PIXEL_SHIFT;</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keywordtype">double</span> resolutionPerPixel = (isXTheta ? xResolutionPerPixel : yResolutionPerPixel);</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> </div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="comment">// Compute number of digits ahead of the decimal point (any single decimal place would work but the decimal point is easiest)</span></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keywordtype">int</span> powerValue = qFloor (qLn (qAbs (valueUnformatted)) / qLn (10.0));</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keywordtype">int</span> powerResolution = qFloor (qLn (qAbs (resolutionPerPixel)) / qLn (10.0));</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span> </div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordtype">int</span> numberDigitsForResolution = powerValue - powerResolution + 1 + modelGeneral.<a class="code" href="classDocumentModelGeneral.html#abf85a567bfb0652b96bd0ff3171a3900">extraPrecision</a>();</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> </div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordflow">return</span> numberDigitsForResolution + 1; <span class="comment">// Add one just to be safe</span></div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> </div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span> </div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keywordflow">return</span> DEFAULT_PRECISION;</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  }</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> }</div><div class="ttc" id="classDocumentModelGeneral_html"><div class="ttname"><a href="classDocumentModelGeneral.html">DocumentModelGeneral</a></div><div class="ttdoc">Model for DlgSettingsGeneral and CmdSettingsGeneral. </div><div class="ttdef"><b>Definition:</b> <a href="DocumentModelGeneral_8h_source.html#l00016">DocumentModelGeneral.h:16</a></div></div>
<div class="ttc" id="classTransformation_html_a481054677254f66d8685ea2e890d4b16"><div class="ttname"><a href="classTransformation.html#a481054677254f66d8685ea2e890d4b16">Transformation::transformRawGraphToScreen</a></div><div class="ttdeci">void transformRawGraphToScreen(const QPointF &pointRaw, QPointF &pointScreen) const</div><div class="ttdoc">Transform from raw graph coordinates to linear cartesian graph coordinates, then to screen coordinate...</div><div class="ttdef"><b>Definition:</b> <a href="Transformation_8cpp_source.html#l00429">Transformation.cpp:429</a></div></div>
<div class="ttc" id="classTransformation_html"><div class="ttname"><a href="classTransformation.html">Transformation</a></div><div class="ttdoc">Affine transformation between screen and graph coordinates, based on digitized axis points...</div><div class="ttdef"><b>Definition:</b> <a href="Transformation_8h_source.html#l00031">Transformation.h:31</a></div></div>
<div class="ttc" id="classFormatCoordsUnitsStrategyAbstractBase_html_a25115555df5f33dcc0f9c0457439fb8c"><div class="ttname"><a href="classFormatCoordsUnitsStrategyAbstractBase.html#a25115555df5f33dcc0f9c0457439fb8c">FormatCoordsUnitsStrategyAbstractBase::FormatCoordsUnitsStrategyAbstractBase</a></div><div class="ttdeci">FormatCoordsUnitsStrategyAbstractBase()</div><div class="ttdoc">Single constructor. </div><div class="ttdef"><b>Definition:</b> <a href="FormatCoordsUnitsStrategyAbstractBase_8cpp_source.html#l00013">FormatCoordsUnitsStrategyAbstractBase.cpp:13</a></div></div>
<div class="ttc" id="classFormatCoordsUnitsStrategyAbstractBase_html_a1018714c66d517f1196c3e413845e9d6"><div class="ttname"><a href="classFormatCoordsUnitsStrategyAbstractBase.html#a1018714c66d517f1196c3e413845e9d6">FormatCoordsUnitsStrategyAbstractBase::precisionDigitsForRawNumber</a></div><div class="ttdeci">int precisionDigitsForRawNumber(double valueUnformatted, double valueUnformattedOther, bool isXTheta, const DocumentModelGeneral &modelGeneral, const Transformation &transformation) const</div><div class="ttdoc">Compute precision for outputting an unformatted value, consistent with the resolution at the point wh...</div><div class="ttdef"><b>Definition:</b> <a href="FormatCoordsUnitsStrategyAbstractBase_8cpp_source.html#l00017">FormatCoordsUnitsStrategyAbstractBase.cpp:17</a></div></div>
<div class="ttc" id="classTransformation_html_aa4962ca8c4634378ab93723b5f403a25"><div class="ttname"><a href="classTransformation.html#aa4962ca8c4634378ab93723b5f403a25">Transformation::transformIsDefined</a></div><div class="ttdeci">bool transformIsDefined() const</div><div class="ttdoc">Transform is defined when at least three axis points have been digitized. </div><div class="ttdef"><b>Definition:</b> <a href="Transformation_8cpp_source.html#l00330">Transformation.cpp:330</a></div></div>
<div class="ttc" id="classTransformation_html_a52c9e6ea2fb295b91625779be3f3c444"><div class="ttname"><a href="classTransformation.html#a52c9e6ea2fb295b91625779be3f3c444">Transformation::transformScreenToRawGraph</a></div><div class="ttdeci">void transformScreenToRawGraph(const QPointF &coordScreen, QPointF &coordGraph) const</div><div class="ttdoc">Transform from cartesian pixel screen coordinates to cartesian/polar graph coordinates. </div><div class="ttdef"><b>Definition:</b> <a href="Transformation_8cpp_source.html#l00448">Transformation.cpp:448</a></div></div>
<div class="ttc" id="classDocumentModelGeneral_html_abf85a567bfb0652b96bd0ff3171a3900"><div class="ttname"><a href="classDocumentModelGeneral.html#abf85a567bfb0652b96bd0ff3171a3900">DocumentModelGeneral::extraPrecision</a></div><div class="ttdeci">int extraPrecision() const</div><div class="ttdoc">Get method for extra digits of precsion. </div><div class="ttdef"><b>Definition:</b> <a href="DocumentModelGeneral_8cpp_source.html#l00061">DocumentModelGeneral.cpp:61</a></div></div>
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