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<div class="title">qwt_clipper.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_clipper.h"</span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include "qwt_point_polar.h"</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include "qwt_interval.h"</span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include "qwt_math.h"</span></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="preprocessor">#include <qpolygon.h></span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include <qrect.h></span></div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>  </div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include <algorithm></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="l00020"></a><span class="lineno"> 20</span> <span class="keyword">namespace </span>QwtClip</div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> {</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  <span class="comment">// some templates used for inlining</span></div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  <span class="keyword">template</span>< <span class="keyword">class</span> Po<span class="keywordtype">int</span>, <span class="keyword">typename</span> T > <span class="keyword">class </span>LeftEdge;</div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  <span class="keyword">template</span>< <span class="keyword">class</span> Po<span class="keywordtype">int</span>, <span class="keyword">typename</span> T > <span class="keyword">class </span>RightEdge;</div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  <span class="keyword">template</span>< <span class="keyword">class</span> Po<span class="keywordtype">int</span>, <span class="keyword">typename</span> T > <span class="keyword">class </span>TopEdge;</div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  <span class="keyword">template</span>< <span class="keyword">class</span> Po<span class="keywordtype">int</span>, <span class="keyword">typename</span> T > <span class="keyword">class </span>BottomEdge;</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="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="keyword">template</span>< <span class="keyword">class</span> Po<span class="keywordtype">int</span>, <span class="keyword">typename</span> Value ></div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="keyword">class </span>QwtClip::LeftEdge</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="keyword">public</span>:</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="keyword">inline</span> LeftEdge( Value x1, Value, Value, Value ):</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  m_x1( x1 )</div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</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>  </div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span> isInside( <span class="keyword">const</span> Point& p )<span class="keyword"> const</span></div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="keyword"> </span>{</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="keywordflow">return</span> p.x() >= m_x1;</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  }</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="keyword">inline</span> Point intersection( <span class="keyword">const</span> Point& p1, <span class="keyword">const</span> Point& p2 )<span class="keyword"> const</span></div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="keyword"> </span>{</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keywordtype">double</span> dy = ( p1.y() - p2.y() ) / <span class="keywordtype">double</span>( p1.x() - p2.x() );</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keywordflow">return</span> Point( m_x1, <span class="keyword">static_cast<</span> Value <span class="keyword">></span>( p2.y() + ( m_x1 - p2.x() ) * dy ) );</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>  <span class="keyword">private</span>:</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keyword">const</span> Value m_x1;</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> };</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  </div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="keyword">template</span>< <span class="keyword">class</span> Po<span class="keywordtype">int</span>, <span class="keyword">typename</span> Value ></div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="keyword">class </span>QwtClip::RightEdge</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>  <span class="keyword">public</span>:</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keyword">inline</span> RightEdge( Value, Value x2, Value, Value ):</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  m_x2( x2 )</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  {</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  }</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  </div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span> isInside( <span class="keyword">const</span> Point& p )<span class="keyword"> const</span></div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="keyword"> </span>{</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordflow">return</span> p.x() <= m_x2;</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  }</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  </div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keyword">inline</span> Point intersection( <span class="keyword">const</span> Point& p1, <span class="keyword">const</span> Point& p2 )<span class="keyword"> const</span></div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="keyword"> </span>{</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keywordtype">double</span> dy = ( p1.y() - p2.y() ) / <span class="keywordtype">double</span>( p1.x() - p2.x() );</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keywordflow">return</span> Point( m_x2, <span class="keyword">static_cast<</span> Value <span class="keyword">></span>( p2.y() + ( m_x2 - p2.x() ) * dy ) );</div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</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">private</span>:</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keyword">const</span> Value m_x2;</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>  </div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="keyword">template</span>< <span class="keyword">class</span> Po<span class="keywordtype">int</span>, <span class="keyword">typename</span> Value ></div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="keyword">class </span>QwtClip::TopEdge</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="l00079"></a><span class="lineno"> 79</span>  <span class="keyword">public</span>:</div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keyword">inline</span> TopEdge( Value, Value, Value y1, Value ):</div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  m_y1( y1 )</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  {</div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  }</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>  <span class="keyword">inline</span> <span class="keywordtype">bool</span> isInside( <span class="keyword">const</span> Point& p )<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="keywordflow">return</span> p.y() >= m_y1;</div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  }</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  </div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keyword">inline</span> Point intersection( <span class="keyword">const</span> Point& p1, <span class="keyword">const</span> Point& p2 )<span class="keyword"> const</span></div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="keyword"> </span>{</div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordtype">double</span> dx = ( p1.x() - p2.x() ) / <span class="keywordtype">double</span>( p1.y() - p2.y() );</div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="keywordflow">return</span> Point( <span class="keyword">static_cast<</span> Value <span class="keyword">></span>( p2.x() + ( m_y1 - p2.y() ) * dx ), m_y1 );</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>  </div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keyword">private</span>:</div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keyword">const</span> Value m_y1;</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>  </div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="keyword">template</span>< <span class="keyword">class</span> Po<span class="keywordtype">int</span>, <span class="keyword">typename</span> Value ></div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="keyword">class </span>QwtClip::BottomEdge</div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> {</div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keyword">public</span>:</div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keyword">inline</span> BottomEdge( Value, Value, Value, Value y2 ):</div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  m_y2( y2 )</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>  <span class="keyword">inline</span> <span class="keywordtype">bool</span> isInside( <span class="keyword">const</span> Point& p )<span class="keyword"> const</span></div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="keyword"> </span>{</div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keywordflow">return</span> p.y() <= m_y2;</div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  }</div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  </div>
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keyword">inline</span> Point intersection( <span class="keyword">const</span> Point& p1, <span class="keyword">const</span> Point& p2 )<span class="keyword"> const</span></div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="keyword"> </span>{</div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="keywordtype">double</span> dx = ( p1.x() - p2.x() ) / <span class="keywordtype">double</span>( p1.y() - p2.y() );</div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keywordflow">return</span> Point( <span class="keyword">static_cast<</span> Value <span class="keyword">></span>( p2.x() + ( m_y2 - p2.y() ) * dx ), m_y2 );</div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  }</div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  </div>
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<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keyword">private</span>:</div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keyword">const</span> Value m_y2;</div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span> };</div>
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  </div>
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<div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="keyword">using namespace </span>QwtClip;</div>
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<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  </div>
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<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="keyword">template</span>< <span class="keyword">class</span> Polygon, <span class="keyword">class</span> Rect, <span class="keyword">typename</span> T ></div>
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<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="keyword">class </span>QwtPolygonClipper</div>
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<div class="line"><a name="l00128"></a><span class="lineno"> 128</span> {</div>
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<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> Polygon::value_type Point;</div>
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<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="keyword">public</span>:</div>
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<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keyword">explicit</span> QwtPolygonClipper( <span class="keyword">const</span> Rect& clipRect ):</div>
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<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  m_clipRect( clipRect )</div>
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<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  {</div>
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<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  }</div>
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<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  </div>
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<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keywordtype">void</span> <a class="code" href="namespace_qwt_clipper.html#a4bbafdea07dca5589537e6db1c7c0b6e">clipPolygon</a>( Polygon& points1, <span class="keywordtype">bool</span> closePolygon )<span class="keyword"> const</span></div>
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<div class="line"><a name="l00137"></a><span class="lineno"> 137</span> <span class="keyword"> </span>{</div>
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<div class="line"><a name="l00138"></a><span class="lineno"> 138</span> <span class="preprocessor">#if 0</span></div>
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<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keywordflow">if</span> ( m_clipRect.contains( points1.boundingRect() ) )</div>
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<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="keywordflow">return</span> polygon;</div>
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<div class="line"><a name="l00141"></a><span class="lineno"> 141</span> <span class="preprocessor">#endif</span></div>
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<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  </div>
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<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  Polygon points2;</div>
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<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  points2.reserve( qMin( 256, points1.size() ) );</div>
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<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  </div>
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<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  clipEdge< LeftEdge< Point, T > >( closePolygon, points1, points2 );</div>
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<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  clipEdge< RightEdge< Point, T > >( closePolygon, points2, points1 );</div>
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<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  clipEdge< TopEdge< Point, T > >( closePolygon, points1, points2 );</div>
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<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  clipEdge< BottomEdge< Point, T > >( closePolygon, points2, points1 );</div>
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<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  }</div>
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<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  </div>
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<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="keyword">private</span>:</div>
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<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="keyword">template</span>< <span class="keyword">class</span> Edge ></div>
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<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="keyword">inline</span> <span class="keywordtype">void</span> clipEdge( <span class="keywordtype">bool</span> closePolygon,</div>
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<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keyword">const</span> Polygon& points, Polygon& clippedPoints )<span class="keyword"> const</span></div>
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<div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="keyword"> </span>{</div>
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<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  clippedPoints.clear();</div>
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<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  </div>
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<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  <span class="keywordflow">if</span> ( points.size() < 2 )</div>
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<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  {</div>
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<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="keywordflow">if</span> ( points.size() == 1 )</div>
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<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  clippedPoints += points[0];</div>
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<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  </div>
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<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keywordflow">return</span>;</div>
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<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  }</div>
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<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  </div>
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<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="keyword">const</span> Edge edge( m_clipRect.x(), m_clipRect.x() + m_clipRect.width(),</div>
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<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  m_clipRect.y(), m_clipRect.y() + m_clipRect.height() );</div>
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<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  </div>
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<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="keywordflow">if</span> ( !closePolygon )</div>
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<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  {</div>
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<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="keyword">const</span> Point& p1 = points.first();</div>
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<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  </div>
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<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="keywordflow">if</span> ( edge.isInside( p1 ) )</div>
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<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  clippedPoints += p1;</div>
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<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  }</div>
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<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="keywordflow">else</span></div>
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<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  {</div>
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<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="keyword">const</span> Point& p1 = points.first();</div>
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<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="keyword">const</span> Point& p2 = points.last();</div>
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<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  </div>
|
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<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="keywordflow">if</span> ( edge.isInside( p1 ) )</div>
|
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<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  {</div>
|
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<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keywordflow">if</span> ( !edge.isInside( p2 ) )</div>
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<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  clippedPoints += edge.intersection( p1, p2 );</div>
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<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  </div>
|
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<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  clippedPoints += p1;</div>
|
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<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  }</div>
|
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<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( edge.isInside( p2 ) )</div>
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<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  {</div>
|
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<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  clippedPoints += edge.intersection( p1, p2 );</div>
|
|
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  }</div>
|
|
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  }</div>
|
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<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  </div>
|
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<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <span class="keyword">const</span> uint nPoints = points.size();</div>
|
|
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="keyword">const</span> Point* p = points.constData();</div>
|
|
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  </div>
|
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<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="keywordflow">for</span> ( uint i = 1; i < nPoints; i++ )</div>
|
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<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  {</div>
|
|
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="keyword">const</span> Point& p1 = p[i];</div>
|
|
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  <span class="keyword">const</span> Point& p2 = p[i - 1];</div>
|
|
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  </div>
|
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<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <span class="keywordflow">if</span> ( edge.isInside( p1 ) )</div>
|
|
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  {</div>
|
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<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <span class="keywordflow">if</span> ( !edge.isInside( p2 ) )</div>
|
|
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  clippedPoints += edge.intersection( p1, p2 );</div>
|
|
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  </div>
|
|
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  clippedPoints += p1;</div>
|
|
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  }</div>
|
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<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( edge.isInside( p2 ) )</div>
|
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<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  {</div>
|
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<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  clippedPoints += edge.intersection( p1, p2 );</div>
|
|
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  }</div>
|
|
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  }</div>
|
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<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  }</div>
|
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<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  </div>
|
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<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="keyword">const</span> Rect m_clipRect;</div>
|
|
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span> };</div>
|
|
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  </div>
|
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<div class="line"><a name="l00220"></a><span class="lineno"> 220</span> <span class="keyword">class </span>QwtCircleClipper</div>
|
|
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span> {</div>
|
|
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="keyword">public</span>:</div>
|
|
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <span class="keyword">explicit</span> QwtCircleClipper( <span class="keyword">const</span> QRectF& r );</div>
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<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  <a class="code" href="class_q_vector.html">QVector< QwtInterval ></a> <a class="code" href="namespace_qwt_clipper.html#ab36605186b4a1c411fccb3b68cf1724a">clipCircle</a>( <span class="keyword">const</span> QPointF&, <span class="keywordtype">double</span> radius ) <span class="keyword">const</span>;</div>
|
|
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  </div>
|
|
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="keyword">private</span>:</div>
|
|
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  <span class="keyword">enum</span> Edge</div>
|
|
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  {</div>
|
|
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  Left,</div>
|
|
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  Top,</div>
|
|
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  Right,</div>
|
|
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  Bottom,</div>
|
|
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  </div>
|
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<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  NEdges</div>
|
|
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  };</div>
|
|
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  </div>
|
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<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <a class="code" href="class_q_vector.html">QVector< QPointF ></a> cuttingPoints(</div>
|
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<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  Edge, <span class="keyword">const</span> QPointF& pos, <span class="keywordtype">double</span> radius ) <span class="keyword">const</span>;</div>
|
|
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  </div>
|
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<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="keywordtype">double</span> toAngle( <span class="keyword">const</span> QPointF&, <span class="keyword">const</span> QPointF& ) <span class="keyword">const</span>;</div>
|
|
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  </div>
|
|
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="keyword">const</span> QRectF m_rect;</div>
|
|
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span> };</div>
|
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<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  </div>
|
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<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  </div>
|
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<div class="line"><a name="l00246"></a><span class="lineno"> 246</span> QwtCircleClipper::QwtCircleClipper( <span class="keyword">const</span> QRectF& r )</div>
|
|
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  : m_rect( r )</div>
|
|
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span> {</div>
|
|
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span> }</div>
|
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<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  </div>
|
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<div class="line"><a name="l00251"></a><span class="lineno"> 251</span> <a class="code" href="class_q_vector.html">QVector< QwtInterval ></a> QwtCircleClipper::clipCircle(</div>
|
|
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  <span class="keyword">const</span> QPointF& pos, <span class="keywordtype">double</span> radius )<span class="keyword"> const</span></div>
|
|
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span> <span class="keyword"></span>{</div>
|
|
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  <span class="comment">// using QVarLengthArray TODO ...</span></div>
|
|
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  </div>
|
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<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  <a class="code" href="class_q_vector.html">QVector< QPointF ></a> points;</div>
|
|
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> edge = 0; edge < NEdges; edge++ )</div>
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<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  points += cuttingPoints( <span class="keyword">static_cast<</span> Edge <span class="keyword">></span>( edge ), pos, radius );</div>
|
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<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  </div>
|
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<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  <a class="code" href="class_q_vector.html">QVector< QwtInterval ></a> intv;</div>
|
|
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <span class="keywordflow">if</span> ( points.size() <= 0 )</div>
|
|
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  {</div>
|
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<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  QRectF cRect( 0, 0, 2 * radius, 2 * radius );</div>
|
|
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  cRect.moveCenter( pos );</div>
|
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<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  <span class="keywordflow">if</span> ( m_rect.contains( cRect ) )</div>
|
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<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  intv += <a class="code" href="class_qwt_interval.html">QwtInterval</a>( 0.0, 2 * M_PI );</div>
|
|
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  }</div>
|
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<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  <span class="keywordflow">else</span></div>
|
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<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  {</div>
|
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<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  <a class="code" href="class_q_vector.html">QVector< double ></a> angles;</div>
|
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<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  angles.reserve( points.size() );</div>
|
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<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  </div>
|
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<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> i = 0; i < points.size(); i++ )</div>
|
|
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  angles += toAngle( pos, points[i] );</div>
|
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<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  </div>
|
|
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  std::sort( angles.begin(), angles.end() );</div>
|
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<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  </div>
|
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<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> in = m_rect.contains( qwtPolar2Pos( pos, radius,</div>
|
|
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  angles[0] + ( angles[1] - angles[0] ) / 2 ) );</div>
|
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<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  </div>
|
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<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  intv.reserve( angles.size() / 2 );</div>
|
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<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  <span class="keywordflow">if</span> ( in )</div>
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<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  {</div>
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<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> i = 0; i < angles.size() - 1; i += 2 )</div>
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<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  intv += <a class="code" href="class_qwt_interval.html">QwtInterval</a>( angles[i], angles[i + 1] );</div>
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<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  }</div>
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<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  <span class="keywordflow">else</span></div>
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<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  {</div>
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<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> i = 1; i < angles.size() - 1; i += 2 )</div>
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<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  intv += <a class="code" href="class_qwt_interval.html">QwtInterval</a>( angles[i], angles[i + 1] );</div>
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<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  </div>
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<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  intv += <a class="code" href="class_qwt_interval.html">QwtInterval</a>( angles.last(), angles.first() );</div>
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<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  }</div>
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<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  }</div>
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<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  </div>
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<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  <span class="keywordflow">return</span> intv;</div>
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<div class="line"><a name="l00297"></a><span class="lineno"> 297</span> }</div>
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<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  </div>
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<div class="line"><a name="l00299"></a><span class="lineno"> 299</span> <span class="keywordtype">double</span> QwtCircleClipper::toAngle(</div>
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<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  <span class="keyword">const</span> QPointF& from, <span class="keyword">const</span> QPointF& to )<span class="keyword"> const</span></div>
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<div class="line"><a name="l00301"></a><span class="lineno"> 301</span> <span class="keyword"></span>{</div>
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<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  <span class="keywordflow">if</span> ( from.x() == to.x() )</div>
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<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  <span class="keywordflow">return</span> from.y() <= to.y() ? M_PI / 2.0 : 3 * M_PI / 2.0;</div>
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<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  </div>
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<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <span class="keyword">const</span> <span class="keywordtype">double</span> m = qAbs( ( to.y() - from.y() ) / ( to.x() - from.x() ) );</div>
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<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  </div>
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<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  <span class="keywordtype">double</span> angle = std::atan( m );</div>
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<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <span class="keywordflow">if</span> ( to.x() > from.x() )</div>
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<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  {</div>
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<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="keywordflow">if</span> ( to.y() > from.y() )</div>
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<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  angle = 2 * M_PI - angle;</div>
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<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  }</div>
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<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  <span class="keywordflow">else</span></div>
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<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  {</div>
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<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  <span class="keywordflow">if</span> ( to.y() > from.y() )</div>
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<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  angle = M_PI + angle;</div>
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<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  <span class="keywordflow">else</span></div>
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<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  angle = M_PI - angle;</div>
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<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  }</div>
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<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  </div>
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<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  <span class="keywordflow">return</span> angle;</div>
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<div class="line"><a name="l00322"></a><span class="lineno"> 322</span> }</div>
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<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  </div>
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<div class="line"><a name="l00324"></a><span class="lineno"> 324</span> <a class="code" href="class_q_vector.html">QVector< QPointF ></a> QwtCircleClipper::cuttingPoints(</div>
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<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  Edge edge, <span class="keyword">const</span> QPointF& pos, <span class="keywordtype">double</span> radius )<span class="keyword"> const</span></div>
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<div class="line"><a name="l00326"></a><span class="lineno"> 326</span> <span class="keyword"></span>{</div>
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<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  <a class="code" href="class_q_vector.html">QVector< QPointF ></a> points;</div>
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<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  </div>
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<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  <span class="keywordflow">if</span> ( edge == Left || edge == Right )</div>
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<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  {</div>
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<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  <span class="keyword">const</span> <span class="keywordtype">double</span> x = ( edge == Left ) ? m_rect.left() : m_rect.right();</div>
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<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  <span class="keywordflow">if</span> ( qAbs( pos.x() - x ) < radius )</div>
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<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  {</div>
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<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  <span class="keyword">const</span> <span class="keywordtype">double</span> off = std::sqrt( qwtSqr( radius ) - qwtSqr( pos.x() - x ) );</div>
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<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  <span class="keyword">const</span> <span class="keywordtype">double</span> m_y1 = pos.y() + off;</div>
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<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  <span class="keywordflow">if</span> ( m_y1 >= m_rect.top() && m_y1 <= m_rect.bottom() )</div>
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<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  points += QPointF( x, m_y1 );</div>
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<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  </div>
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<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  <span class="keyword">const</span> <span class="keywordtype">double</span> m_y2 = pos.y() - off;</div>
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<div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  <span class="keywordflow">if</span> ( m_y2 >= m_rect.top() && m_y2 <= m_rect.bottom() )</div>
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<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  points += QPointF( x, m_y2 );</div>
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<div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  }</div>
|
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<div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  }</div>
|
|
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  <span class="keywordflow">else</span></div>
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<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  {</div>
|
|
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  <span class="keyword">const</span> <span class="keywordtype">double</span> y = ( edge == Top ) ? m_rect.top() : m_rect.bottom();</div>
|
|
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  <span class="keywordflow">if</span> ( qAbs( pos.y() - y ) < radius )</div>
|
|
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  {</div>
|
|
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  <span class="keyword">const</span> <span class="keywordtype">double</span> off = std::sqrt( qwtSqr( radius ) - qwtSqr( pos.y() - y ) );</div>
|
|
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  <span class="keyword">const</span> <span class="keywordtype">double</span> x1 = pos.x() + off;</div>
|
|
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  <span class="keywordflow">if</span> ( x1 >= m_rect.left() && x1 <= m_rect.right() )</div>
|
|
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  points += QPointF( x1, y );</div>
|
|
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  </div>
|
|
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  <span class="keyword">const</span> <span class="keywordtype">double</span> m_x2 = pos.x() - off;</div>
|
|
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  <span class="keywordflow">if</span> ( m_x2 >= m_rect.left() && m_x2 <= m_rect.right() )</div>
|
|
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  points += QPointF( m_x2, y );</div>
|
|
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  }</div>
|
|
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  }</div>
|
|
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  <span class="keywordflow">return</span> points;</div>
|
|
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span> }</div>
|
|
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  </div>
|
|
<div class="line"><a name="l00369"></a><span class="lineno"><a class="line" href="namespace_qwt_clipper.html#a98a7c4009d2f8ac325b35255c85b0b34"> 369</a></span> <span class="keywordtype">void</span> <a class="code" href="namespace_qwt_clipper.html#a4bbafdea07dca5589537e6db1c7c0b6e">QwtClipper::clipPolygon</a>(</div>
|
|
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  <span class="keyword">const</span> QRectF& clipRect, QPolygon& polygon, <span class="keywordtype">bool</span> closePolygon )</div>
|
|
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span> {</div>
|
|
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> minX = qCeil( clipRect.left() );</div>
|
|
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> maxX = qFloor( clipRect.right() );</div>
|
|
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> minY = qCeil( clipRect.top() );</div>
|
|
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> maxY = qFloor( clipRect.bottom() );</div>
|
|
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  </div>
|
|
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  <span class="keyword">const</span> QRect r( minX, minY, maxX - minX, maxY - minY );</div>
|
|
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  </div>
|
|
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  QwtPolygonClipper< QPolygon, QRect, int > clipper( r );</div>
|
|
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  clipper.clipPolygon( polygon, closePolygon );</div>
|
|
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span> }</div>
|
|
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  </div>
|
|
<div class="line"><a name="l00390"></a><span class="lineno"><a class="line" href="namespace_qwt_clipper.html#a4bbafdea07dca5589537e6db1c7c0b6e"> 390</a></span> <span class="keywordtype">void</span> <a class="code" href="namespace_qwt_clipper.html#a4bbafdea07dca5589537e6db1c7c0b6e">QwtClipper::clipPolygon</a>(</div>
|
|
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  <span class="keyword">const</span> QRect& clipRect, QPolygon& polygon, <span class="keywordtype">bool</span> closePolygon )</div>
|
|
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span> {</div>
|
|
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  QwtPolygonClipper< QPolygon, QRect, int > clipper( clipRect );</div>
|
|
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  clipper.clipPolygon( polygon, closePolygon );</div>
|
|
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span> }</div>
|
|
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  </div>
|
|
<div class="line"><a name="l00404"></a><span class="lineno"><a class="line" href="namespace_qwt_clipper.html#aa5305d415fd97b332825e68b6cb25715"> 404</a></span> <span class="keywordtype">void</span> <a class="code" href="namespace_qwt_clipper.html#aa5305d415fd97b332825e68b6cb25715">QwtClipper::clipPolygonF</a>(</div>
|
|
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  <span class="keyword">const</span> QRectF& clipRect, QPolygonF& polygon, <span class="keywordtype">bool</span> closePolygon )</div>
|
|
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span> {</div>
|
|
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  QwtPolygonClipper< QPolygonF, QRectF, double > clipper( clipRect );</div>
|
|
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  clipper.clipPolygon( polygon, closePolygon );</div>
|
|
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span> }</div>
|
|
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  </div>
|
|
<div class="line"><a name="l00420"></a><span class="lineno"><a class="line" href="namespace_qwt_clipper.html#a2891a88d006edea48ac0275da4d6de33"> 420</a></span> QPolygon <a class="code" href="namespace_qwt_clipper.html#abf6fbe8c4d00b9608ac08278c4891cb8">QwtClipper::clippedPolygon</a>(</div>
|
|
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  <span class="keyword">const</span> QRectF& clipRect, <span class="keyword">const</span> QPolygon& polygon, <span class="keywordtype">bool</span> closePolygon )</div>
|
|
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span> {</div>
|
|
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  QPolygon points( polygon );</div>
|
|
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  <a class="code" href="namespace_qwt_clipper.html#a4bbafdea07dca5589537e6db1c7c0b6e">clipPolygon</a>( clipRect, points, closePolygon );</div>
|
|
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  </div>
|
|
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  <span class="keywordflow">return</span> points;</div>
|
|
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span> }</div>
|
|
<div class="line"><a name="l00437"></a><span class="lineno"><a class="line" href="namespace_qwt_clipper.html#abf6fbe8c4d00b9608ac08278c4891cb8"> 437</a></span> QPolygon <a class="code" href="namespace_qwt_clipper.html#abf6fbe8c4d00b9608ac08278c4891cb8">QwtClipper::clippedPolygon</a>(</div>
|
|
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  <span class="keyword">const</span> QRect& clipRect, <span class="keyword">const</span> QPolygon& polygon, <span class="keywordtype">bool</span> closePolygon )</div>
|
|
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span> {</div>
|
|
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  QPolygon points( polygon );</div>
|
|
<div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  <a class="code" href="namespace_qwt_clipper.html#a4bbafdea07dca5589537e6db1c7c0b6e">clipPolygon</a>( clipRect, points, closePolygon );</div>
|
|
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  </div>
|
|
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  <span class="keywordflow">return</span> points;</div>
|
|
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span> }</div>
|
|
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  </div>
|
|
<div class="line"><a name="l00455"></a><span class="lineno"><a class="line" href="namespace_qwt_clipper.html#a7c876c77f33931add58f80a98885af07"> 455</a></span> QPolygonF <a class="code" href="namespace_qwt_clipper.html#a7c876c77f33931add58f80a98885af07">QwtClipper::clippedPolygonF</a>(</div>
|
|
<div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  <span class="keyword">const</span> QRectF& clipRect, <span class="keyword">const</span> QPolygonF& polygon, <span class="keywordtype">bool</span> closePolygon )</div>
|
|
<div class="line"><a name="l00457"></a><span class="lineno"> 457</span> {</div>
|
|
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  QPolygonF points( polygon );</div>
|
|
<div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  <a class="code" href="namespace_qwt_clipper.html#aa5305d415fd97b332825e68b6cb25715">clipPolygonF</a>( clipRect, points, closePolygon );</div>
|
|
<div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  </div>
|
|
<div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  <span class="keywordflow">return</span> points;</div>
|
|
<div class="line"><a name="l00462"></a><span class="lineno"> 462</span> }</div>
|
|
<div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  </div>
|
|
<div class="line"><a name="l00477"></a><span class="lineno"><a class="line" href="namespace_qwt_clipper.html#ab36605186b4a1c411fccb3b68cf1724a"> 477</a></span> <a class="code" href="class_q_vector.html">QVector< QwtInterval ></a> <a class="code" href="namespace_qwt_clipper.html#ab36605186b4a1c411fccb3b68cf1724a">QwtClipper::clipCircle</a>( <span class="keyword">const</span> QRectF& clipRect,</div>
|
|
<div class="line"><a name="l00478"></a><span class="lineno"> 478</span>  <span class="keyword">const</span> QPointF& center, <span class="keywordtype">double</span> radius )</div>
|
|
<div class="line"><a name="l00479"></a><span class="lineno"> 479</span> {</div>
|
|
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span>  QwtCircleClipper clipper( clipRect );</div>
|
|
<div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  <span class="keywordflow">return</span> clipper.clipCircle( center, radius );</div>
|
|
<div class="line"><a name="l00482"></a><span class="lineno"> 482</span> }</div>
|
|
<div class="ttc" id="aclass_q_vector_html"><div class="ttname"><a href="class_q_vector.html">QVector</a></div><div class="ttdef"><b>Definition:</b> <a href="qwt__clipper_8h_source.html#l00023">qwt_clipper.h:23</a></div></div>
|
|
<div class="ttc" id="aclass_qwt_interval_html"><div class="ttname"><a href="class_qwt_interval.html">QwtInterval</a></div><div class="ttdoc">A class representing an interval.</div><div class="ttdef"><b>Definition:</b> <a href="qwt__interval_8h_source.html#l00022">qwt_interval.h:23</a></div></div>
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<div class="ttc" id="anamespace_qwt_clipper_html_a4bbafdea07dca5589537e6db1c7c0b6e"><div class="ttname"><a href="namespace_qwt_clipper.html#a4bbafdea07dca5589537e6db1c7c0b6e">QwtClipper::clipPolygon</a></div><div class="ttdeci">QWT_EXPORT void clipPolygon(const QRect &, QPolygon &, bool closePolygon=false)</div><div class="ttdef"><b>Definition:</b> <a href="qwt__clipper_8cpp_source.html#l00390">qwt_clipper.cpp:390</a></div></div>
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<div class="ttc" id="anamespace_qwt_clipper_html_a7c876c77f33931add58f80a98885af07"><div class="ttname"><a href="namespace_qwt_clipper.html#a7c876c77f33931add58f80a98885af07">QwtClipper::clippedPolygonF</a></div><div class="ttdeci">QWT_EXPORT QPolygonF clippedPolygonF(const QRectF &, const QPolygonF &, bool closePolygon=false)</div><div class="ttdef"><b>Definition:</b> <a href="qwt__clipper_8cpp_source.html#l00455">qwt_clipper.cpp:455</a></div></div>
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<div class="ttc" id="anamespace_qwt_clipper_html_aa5305d415fd97b332825e68b6cb25715"><div class="ttname"><a href="namespace_qwt_clipper.html#aa5305d415fd97b332825e68b6cb25715">QwtClipper::clipPolygonF</a></div><div class="ttdeci">QWT_EXPORT void clipPolygonF(const QRectF &, QPolygonF &, bool closePolygon=false)</div><div class="ttdef"><b>Definition:</b> <a href="qwt__clipper_8cpp_source.html#l00404">qwt_clipper.cpp:404</a></div></div>
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<div class="ttc" id="anamespace_qwt_clipper_html_ab36605186b4a1c411fccb3b68cf1724a"><div class="ttname"><a href="namespace_qwt_clipper.html#ab36605186b4a1c411fccb3b68cf1724a">QwtClipper::clipCircle</a></div><div class="ttdeci">QWT_EXPORT QVector< QwtInterval > clipCircle(const QRectF &, const QPointF &, double radius)</div><div class="ttdef"><b>Definition:</b> <a href="qwt__clipper_8cpp_source.html#l00477">qwt_clipper.cpp:477</a></div></div>
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<div class="ttc" id="anamespace_qwt_clipper_html_abf6fbe8c4d00b9608ac08278c4891cb8"><div class="ttname"><a href="namespace_qwt_clipper.html#abf6fbe8c4d00b9608ac08278c4891cb8">QwtClipper::clippedPolygon</a></div><div class="ttdeci">QWT_EXPORT QPolygon clippedPolygon(const QRect &, const QPolygon &, bool closePolygon=false)</div><div class="ttdef"><b>Definition:</b> <a href="qwt__clipper_8cpp_source.html#l00437">qwt_clipper.cpp:437</a></div></div>
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