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 <span id="projectnumber">6.1.0</span>
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<div class="title">qwt_pixel_matrix.h</div> </div>
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<div class="contents">
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************</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) 2003 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">#ifndef QWT_PIXEL_MATRIX_H</span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor"></span><span class="preprocessor">#define QWT_PIXEL_MATRIX_H</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor"></span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include "qwt_global.h"</span></div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include <qbitarray.h></span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include <qrect.h></span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> </div>
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<div class="line"><a name="l00023"></a><span class="lineno"><a class="code" href="class_qwt_pixel_matrix.html"> 23</a></span> <span class="keyword">class </span>QWT_EXPORT <a class="code" href="class_qwt_pixel_matrix.html" title="A bit field corresponding to the pixels of a rectangle.">QwtPixelMatrix</a>: <span class="keyword">public</span> QBitArray</div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> {</div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="keyword">public</span>:</div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  <a class="code" href="class_qwt_pixel_matrix.html" title="A bit field corresponding to the pixels of a rectangle.">QwtPixelMatrix</a>( <span class="keyword">const</span> QRect& rect );</div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  ~<a class="code" href="class_qwt_pixel_matrix.html" title="A bit field corresponding to the pixels of a rectangle.">QwtPixelMatrix</a>();</div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <span class="keywordtype">void</span> setRect( <span class="keyword">const</span> QRect& rect );</div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  QRect rect() <span class="keyword">const</span>;</div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> </div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="keywordtype">bool</span> testPixel( <span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y ) <span class="keyword">const</span>;</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="keywordtype">bool</span> testAndSetPixel( <span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y, <span class="keywordtype">bool</span> on );</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> </div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keywordtype">int</span> index( <span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y ) <span class="keyword">const</span>;</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="keyword">private</span>:</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  QRect d_rect;</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> };</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> </div>
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<div class="line"><a name="l00050"></a><span class="lineno"><a class="code" href="class_qwt_pixel_matrix.html#a1089a8d1da928ed35766da496a9b234e"> 50</a></span> <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_pixel_matrix.html#a1089a8d1da928ed35766da496a9b234e" title="Test if a pixel has been set.">QwtPixelMatrix::testPixel</a>( <span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y )<span class="keyword"> const</span></div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="keyword"></span>{</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> idx = <a class="code" href="class_qwt_pixel_matrix.html#a786989b4ff383d7939edbba31c89178d" title="Calculate the index in the bit field corresponding to a position.">index</a>( x, y );</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keywordflow">return</span> ( idx >= 0 ) ? testBit( idx ) : <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> }</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> </div>
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<div class="line"><a name="l00066"></a><span class="lineno"><a class="code" href="class_qwt_pixel_matrix.html#a51c2ecd161c0c93dccb62fcf640ff280"> 66</a></span> <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_pixel_matrix.html#a51c2ecd161c0c93dccb62fcf640ff280" title="Set a pixel and test if a pixel has been set before.">QwtPixelMatrix::testAndSetPixel</a>( <span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y, <span class="keywordtype">bool</span> on )</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> {</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> idx = <a class="code" href="class_qwt_pixel_matrix.html#a786989b4ff383d7939edbba31c89178d" title="Calculate the index in the bit field corresponding to a position.">index</a>( x, y );</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keywordflow">if</span> ( idx < 0 )</div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> </div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> onBefore = testBit( idx );</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  setBit( idx, on );</div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> </div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keywordflow">return</span> onBefore;</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> }</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="l00085"></a><span class="lineno"><a class="code" href="class_qwt_pixel_matrix.html#a786989b4ff383d7939edbba31c89178d"> 85</a></span> <span class="keyword">inline</span> <span class="keywordtype">int</span> <a class="code" href="class_qwt_pixel_matrix.html#a786989b4ff383d7939edbba31c89178d" title="Calculate the index in the bit field corresponding to a position.">QwtPixelMatrix::index</a>( <span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y )<span class="keyword"> const</span></div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="keyword"></span>{</div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> dx = x - d_rect.x();</div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordflow">if</span> ( dx < 0 || dx >= d_rect.width() )</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keywordflow">return</span> -1;</div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> </div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> dy = y - d_rect.y();</div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordflow">if</span> ( dy < 0 || dy >= d_rect.height() )</div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="keywordflow">return</span> -1;</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keywordflow">return</span> dy * d_rect.width() + dx;</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> </div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="preprocessor">#endif</span></div>
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