lib/paintweb/docs/api-ref/symbols/src/src_tools_polygon.js.html

   1 <html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"> <style>
   2         .KEYW {color: #933;}
   3         .COMM {color: #bbb; font-style: italic;}
   4         .NUMB {color: #393;}
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   7         .line {border-right: 1px dotted #666; color: #666; font-style: normal;}
   8         </style></head><body><pre><span class='line'>  1</span> <span class="COMM">/*
   9 <span class='line'>  2</span>  * Copyright (C) 2008, 2009 Mihai Şucan
  10 <span class='line'>  3</span>  *
  11 <span class='line'>  4</span>  * This file is part of PaintWeb.
  12 <span class='line'>  5</span>  *
  13 <span class='line'>  6</span>  * PaintWeb is free software: you can redistribute it and/or modify
  14 <span class='line'>  7</span>  * it under the terms of the GNU General Public License as published by
  15 <span class='line'>  8</span>  * the Free Software Foundation, either version 3 of the License, or
  16 <span class='line'>  9</span>  * (at your option) any later version.
  17 <span class='line'> 10</span>  *
  18 <span class='line'> 11</span>  * PaintWeb is distributed in the hope that it will be useful,
  19 <span class='line'> 12</span>  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 <span class='line'> 13</span>  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 <span class='line'> 14</span>  * GNU General Public License for more details.
  22 <span class='line'> 15</span>  *
  23 <span class='line'> 16</span>  * You should have received a copy of the GNU General Public License
  24 <span class='line'> 17</span>  * along with PaintWeb.  If not, see &lt;http://www.gnu.org/licenses/>.
  25 <span class='line'> 18</span>  *
  26 <span class='line'> 19</span>  * $URL: http://code.google.com/p/paintweb $
  27 <span class='line'> 20</span>  * $Date: 2009-06-11 20:28:07 +0300 $
  28 <span class='line'> 21</span>  */</span><span class="WHIT">
  29 <span class='line'> 22</span>
  30 <span class='line'> 23</span> </span><span class="COMM">/**
  31 <span class='line'> 24</span>  * @author &lt;a lang="ro" href="http://www.robodesign.ro/mihai">Mihai Şucan&lt;/a>
  32 <span class='line'> 25</span>  * @fileOverview Holds the polygon tool implementation.
  33 <span class='line'> 26</span>  */</span><span class="WHIT">
  34 <span class='line'> 27</span>
  35 <span class='line'> 28</span> </span><span class="COMM">/**
  36 <span class='line'> 29</span>  * @class The polygon tool.
  37 <span class='line'> 30</span>  *
  38 <span class='line'> 31</span>  * @param {PaintWeb} app Reference to the main paint application object.
  39 <span class='line'> 32</span>  */</span><span class="WHIT">
  40 <span class='line'> 33</span> </span><span class="NAME">pwlib.tools.polygon</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">app</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
  41 <span class='line'> 34</span> </span><span class="WHIT">  </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">_self</span><span class="WHIT">         </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">this</span><span class="PUNC">,</span><span class="WHIT">
  42 <span class='line'> 35</span> </span><span class="WHIT">      </span><span class="NAME">clearInterval</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">app.win.clearInterval</span><span class="PUNC">,</span><span class="WHIT">
  43 <span class='line'> 36</span> </span><span class="WHIT">      </span><span class="NAME">config</span><span class="WHIT">        </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">app.config</span><span class="PUNC">,</span><span class="WHIT">
  44 <span class='line'> 37</span> </span><span class="WHIT">      </span><span class="NAME">context</span><span class="WHIT">       </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">app.buffer.context</span><span class="PUNC">,</span><span class="WHIT">
  45 <span class='line'> 38</span> </span><span class="WHIT">      </span><span class="NAME">gui</span><span class="WHIT">           </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">app.gui</span><span class="PUNC">,</span><span class="WHIT">
  46 <span class='line'> 39</span> </span><span class="WHIT">      </span><span class="NAME">image</span><span class="WHIT">         </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">app.image</span><span class="PUNC">,</span><span class="WHIT">
  47 <span class='line'> 40</span> </span><span class="WHIT">      </span><span class="NAME">MathAbs</span><span class="WHIT">       </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">Math.abs</span><span class="PUNC">,</span><span class="WHIT">
  48 <span class='line'> 41</span> </span><span class="WHIT">      </span><span class="NAME">mouse</span><span class="WHIT">         </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">app.mouse</span><span class="PUNC">,</span><span class="WHIT">
  49 <span class='line'> 42</span> </span><span class="WHIT">      </span><span class="NAME">setInterval</span><span class="WHIT">   </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">app.win.setInterval</span><span class="PUNC">,</span><span class="WHIT">
  50 <span class='line'> 43</span> </span><span class="WHIT">      </span><span class="NAME">snapXY</span><span class="WHIT">        </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">app.toolSnapXY</span><span class="PUNC">;</span><span class="WHIT">
  51 <span class='line'> 44</span>
  52 <span class='line'> 45</span> </span><span class="WHIT">  </span><span class="COMM">/**
  53 <span class='line'> 46</span>    * Holds the points in the polygon being drawn.
  54 <span class='line'> 47</span>    *
  55 <span class='line'> 48</span>    * @private
  56 <span class='line'> 49</span>    * @type Array
  57 <span class='line'> 50</span>    */</span><span class="WHIT">
  58 <span class='line'> 51</span> </span><span class="WHIT">  </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">points</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="PUNC">[</span><span class="PUNC">]</span><span class="PUNC">;</span><span class="WHIT">
  59 <span class='line'> 52</span>
  60 <span class='line'> 53</span> </span><span class="WHIT">  </span><span class="COMM">/**
  61 <span class='line'> 54</span>    * The interval ID used for invoking the drawing operation every few
  62 <span class='line'> 55</span>    * milliseconds.
  63 <span class='line'> 56</span>    *
  64 <span class='line'> 57</span>    * @private
  65 <span class='line'> 58</span>    * @see PaintWeb.config.toolDrawDelay
  66 <span class='line'> 59</span>    */</span><span class="WHIT">
  67 <span class='line'> 60</span> </span><span class="WHIT">  </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">timer</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">null</span><span class="PUNC">;</span><span class="WHIT">
  68 <span class='line'> 61</span>
  69 <span class='line'> 62</span> </span><span class="WHIT">  </span><span class="COMM">/**
  70 <span class='line'> 63</span>    * Tells if the &lt;kbd>Shift&lt;/kbd> key is down or not. This is used by the
  71 <span class='line'> 64</span>    * drawing function.
  72 <span class='line'> 65</span>    *
  73 <span class='line'> 66</span>    * @private
  74 <span class='line'> 67</span>    * @type Boolean
  75 <span class='line'> 68</span>    * @default false
  76 <span class='line'> 69</span>    */</span><span class="WHIT">
  77 <span class='line'> 70</span> </span><span class="WHIT">  </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">shiftKey</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">false</span><span class="PUNC">;</span><span class="WHIT">
  78 <span class='line'> 71</span>
  79 <span class='line'> 72</span> </span><span class="WHIT">  </span><span class="COMM">/**
  80 <span class='line'> 73</span>    * Tells if the drawing canvas needs to be updated or not.
  81 <span class='line'> 74</span>    *
  82 <span class='line'> 75</span>    * @private
  83 <span class='line'> 76</span>    * @type Boolean
  84 <span class='line'> 77</span>    * @default false
  85 <span class='line'> 78</span>    */</span><span class="WHIT">
  86 <span class='line'> 79</span> </span><span class="WHIT">  </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">needsRedraw</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">false</span><span class="PUNC">;</span><span class="WHIT">
  87 <span class='line'> 80</span>
  88 <span class='line'> 81</span> </span><span class="WHIT">  </span><span class="COMM">/**
  89 <span class='line'> 82</span>    * The tool deactivation method, used for clearing the buffer.
  90 <span class='line'> 83</span>    */</span><span class="WHIT">
  91 <span class='line'> 84</span> </span><span class="WHIT">  </span><span class="NAME">this.deactivate</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
  92 <span class='line'> 85</span> </span><span class="WHIT">    </span><span class="KEYW">if</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">timer</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
  93 <span class='line'> 86</span> </span><span class="WHIT">      </span><span class="NAME">clearInterval</span><span class="PUNC">(</span><span class="NAME">timer</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
  94 <span class='line'> 87</span> </span><span class="WHIT">      </span><span class="NAME">timer</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">null</span><span class="PUNC">;</span><span class="WHIT">
  95 <span class='line'> 88</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
  96 <span class='line'> 89</span>
  97 <span class='line'> 90</span> </span><span class="WHIT">    </span><span class="KEYW">if</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">points.length</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
  98 <span class='line'> 91</span> </span><span class="WHIT">      </span><span class="NAME">context.clearRect</span><span class="PUNC">(</span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">image.width</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">image.height</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
  99 <span class='line'> 92</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 100 <span class='line'> 93</span>
 101 <span class='line'> 94</span> </span><span class="WHIT">    </span><span class="NAME">needsRedraw</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">false</span><span class="PUNC">;</span><span class="WHIT">
 102 <span class='line'> 95</span> </span><span class="WHIT">    </span><span class="NAME">points</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="PUNC">[</span><span class="PUNC">]</span><span class="PUNC">;</span><span class="WHIT">
 103 <span class='line'> 96</span>
 104 <span class='line'> 97</span> </span><span class="WHIT">    </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="KEYW">true</span><span class="PUNC">;</span><span class="WHIT">
 105 <span class='line'> 98</span> </span><span class="WHIT">  </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
 106 <span class='line'> 99</span>
 107 <span class='line'>100</span> </span><span class="WHIT">  </span><span class="COMM">/**
 108 <span class='line'>101</span>    * The &lt;code>mousedown&lt;/code> event handler.
 109 <span class='line'>102</span>    *
 110 <span class='line'>103</span>    * @param {Event} ev The DOM Event object.
 111 <span class='line'>104</span>    * @returns {Boolean} True if the event handler executed, or false if not.
 112 <span class='line'>105</span>    */</span><span class="WHIT">
 113 <span class='line'>106</span> </span><span class="WHIT">  </span><span class="NAME">this.mousedown</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">ev</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 114 <span class='line'>107</span> </span><span class="WHIT">    </span><span class="KEYW">if</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">points.length</span><span class="WHIT"> </span><span class="PUNC">==</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 115 <span class='line'>108</span> </span><span class="WHIT">      </span><span class="NAME">points.push</span><span class="PUNC">(</span><span class="PUNC">[</span><span class="NAME">mouse.x</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">mouse.y</span><span class="PUNC">]</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 116 <span class='line'>109</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 117 <span class='line'>110</span>
 118 <span class='line'>111</span> </span><span class="WHIT">    </span><span class="KEYW">if</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="PUNC">!</span><span class="NAME">timer</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 119 <span class='line'>112</span> </span><span class="WHIT">      </span><span class="NAME">timer</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">setInterval</span><span class="PUNC">(</span><span class="NAME">_self.draw</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">config.toolDrawDelay</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 120 <span class='line'>113</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 121 <span class='line'>114</span>
 122 <span class='line'>115</span> </span><span class="WHIT">    </span><span class="NAME">shiftKey</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">ev.shiftKey</span><span class="PUNC">;</span><span class="WHIT">
 123 <span class='line'>116</span> </span><span class="WHIT">    </span><span class="NAME">needsRedraw</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">false</span><span class="PUNC">;</span><span class="WHIT">
 124 <span class='line'>117</span>
 125 <span class='line'>118</span> </span><span class="WHIT">    </span><span class="NAME">gui.statusShow</span><span class="PUNC">(</span><span class="STRN">'polygonMousedown'</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 126 <span class='line'>119</span>
 127 <span class='line'>120</span> </span><span class="WHIT">    </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="KEYW">true</span><span class="PUNC">;</span><span class="WHIT">
 128 <span class='line'>121</span> </span><span class="WHIT">  </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
 129 <span class='line'>122</span>
 130 <span class='line'>123</span> </span><span class="WHIT">  </span><span class="COMM">/**
 131 <span class='line'>124</span>    * Store the &lt;kbd>Shift&lt;/kbd> key state which is used by the drawing function.
 132 <span class='line'>125</span>    *
 133 <span class='line'>126</span>    * @param {Event} ev The DOM Event object.
 134 <span class='line'>127</span>    */</span><span class="WHIT">
 135 <span class='line'>128</span> </span><span class="WHIT">  </span><span class="NAME">this.mousemove</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">ev</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 136 <span class='line'>129</span> </span><span class="WHIT">    </span><span class="NAME">shiftKey</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">ev.shiftKey</span><span class="PUNC">;</span><span class="WHIT">
 137 <span class='line'>130</span> </span><span class="WHIT">    </span><span class="NAME">needsRedraw</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">true</span><span class="PUNC">;</span><span class="WHIT">
 138 <span class='line'>131</span> </span><span class="WHIT">  </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
 139 <span class='line'>132</span>
 140 <span class='line'>133</span> </span><span class="WHIT">  </span><span class="COMM">/**
 141 <span class='line'>134</span>    * Draw the polygon.
 142 <span class='line'>135</span>    *
 143 <span class='line'>136</span>    * @see PaintWeb.config.toolDrawDelay
 144 <span class='line'>137</span>    */</span><span class="WHIT">
 145 <span class='line'>138</span> </span><span class="WHIT">  </span><span class="NAME">this.draw</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">ev</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 146 <span class='line'>139</span> </span><span class="WHIT">    </span><span class="KEYW">if</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="PUNC">!</span><span class="NAME">needsRedraw</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 147 <span class='line'>140</span> </span><span class="WHIT">      </span><span class="KEYW">return</span><span class="PUNC">;</span><span class="WHIT">
 148 <span class='line'>141</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 149 <span class='line'>142</span>
 150 <span class='line'>143</span> </span><span class="WHIT">    </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">n</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">points.length</span><span class="PUNC">;</span><span class="WHIT">
 151 <span class='line'>144</span>
 152 <span class='line'>145</span> </span><span class="WHIT">    </span><span class="KEYW">if</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="PUNC">!</span><span class="NAME">n</span><span class="WHIT"> </span><span class="PUNC">||</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">n</span><span class="WHIT"> </span><span class="PUNC">==</span><span class="WHIT"> </span><span class="NUMB">1</span><span class="WHIT"> </span><span class="PUNC">&&</span><span class="WHIT"> </span><span class="PUNC">!</span><span class="NAME">mouse.buttonDown</span><span class="PUNC">)</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 153 <span class='line'>146</span> </span><span class="WHIT">      </span><span class="NAME">needsRedraw</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">false</span><span class="PUNC">;</span><span class="WHIT">
 154 <span class='line'>147</span> </span><span class="WHIT">      </span><span class="KEYW">return</span><span class="PUNC">;</span><span class="WHIT">
 155 <span class='line'>148</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 156 <span class='line'>149</span>
 157 <span class='line'>150</span> </span><span class="WHIT">    </span><span class="COMM">// Snapping on the X/Y axis for the current point (if available).</span><span class="WHIT">
 158 <span class='line'>151</span> </span><span class="WHIT">    </span><span class="KEYW">if</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">mouse.buttonDown</span><span class="WHIT"> </span><span class="PUNC">&&</span><span class="WHIT"> </span><span class="NAME">shiftKey</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 159 <span class='line'>152</span> </span><span class="WHIT">      </span><span class="NAME">snapXY</span><span class="PUNC">(</span><span class="NAME">points</span><span class="PUNC">[</span><span class="NAME">n</span><span class="PUNC">-</span><span class="NUMB">1</span><span class="PUNC">]</span><span class="PUNC">[</span><span class="NUMB">0</span><span class="PUNC">]</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">points</span><span class="PUNC">[</span><span class="NAME">n</span><span class="PUNC">-</span><span class="NUMB">1</span><span class="PUNC">]</span><span class="PUNC">[</span><span class="NUMB">1</span><span class="PUNC">]</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 160 <span class='line'>153</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 161 <span class='line'>154</span>
 162 <span class='line'>155</span> </span><span class="WHIT">    </span><span class="NAME">context.clearRect</span><span class="PUNC">(</span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">image.width</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">image.height</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 163 <span class='line'>156</span> </span><span class="WHIT">    </span><span class="NAME">context.beginPath</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 164 <span class='line'>157</span> </span><span class="WHIT">    </span><span class="NAME">context.moveTo</span><span class="PUNC">(</span><span class="NAME">points</span><span class="PUNC">[</span><span class="NUMB">0</span><span class="PUNC">]</span><span class="PUNC">[</span><span class="NUMB">0</span><span class="PUNC">]</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">points</span><span class="PUNC">[</span><span class="NUMB">0</span><span class="PUNC">]</span><span class="PUNC">[</span><span class="NUMB">1</span><span class="PUNC">]</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 165 <span class='line'>158</span>
 166 <span class='line'>159</span> </span><span class="WHIT">    </span><span class="COMM">// Draw the path of the polygon</span><span class="WHIT">
 167 <span class='line'>160</span> </span><span class="WHIT">    </span><span class="KEYW">for</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">i</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">;</span><span class="WHIT"> </span><span class="NAME">i</span><span class="WHIT"> </span><span class="PUNC">&lt;</span><span class="WHIT"> </span><span class="NAME">n</span><span class="PUNC">;</span><span class="WHIT"> </span><span class="NAME">i</span><span class="PUNC">++</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 168 <span class='line'>161</span> </span><span class="WHIT">      </span><span class="NAME">context.lineTo</span><span class="PUNC">(</span><span class="NAME">points</span><span class="PUNC">[</span><span class="NAME">i</span><span class="PUNC">]</span><span class="PUNC">[</span><span class="NUMB">0</span><span class="PUNC">]</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">points</span><span class="PUNC">[</span><span class="NAME">i</span><span class="PUNC">]</span><span class="PUNC">[</span><span class="NUMB">1</span><span class="PUNC">]</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 169 <span class='line'>162</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 170 <span class='line'>163</span>
 171 <span class='line'>164</span> </span><span class="WHIT">    </span><span class="KEYW">if</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">mouse.buttonDown</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 172 <span class='line'>165</span> </span><span class="WHIT">      </span><span class="NAME">context.lineTo</span><span class="PUNC">(</span><span class="NAME">mouse.x</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">mouse.y</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 173 <span class='line'>166</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 174 <span class='line'>167</span>
 175 <span class='line'>168</span> </span><span class="WHIT">    </span><span class="KEYW">if</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">config.shapeType</span><span class="WHIT"> </span><span class="PUNC">!=</span><span class="WHIT"> </span><span class="STRN">'stroke'</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 176 <span class='line'>169</span> </span><span class="WHIT">      </span><span class="NAME">context.fill</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 177 <span class='line'>170</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 178 <span class='line'>171</span>
 179 <span class='line'>172</span> </span><span class="WHIT">    </span><span class="COMM">// In the case where we only have a straight line, draw a stroke even if no </span><span class="WHIT">
 180 <span class='line'>173</span> </span><span class="WHIT">    </span><span class="COMM">// stroke should be drawn, such that the user has better visual feedback.</span><span class="WHIT">
 181 <span class='line'>174</span> </span><span class="WHIT">    </span><span class="KEYW">if</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">config.shapeType</span><span class="WHIT"> </span><span class="PUNC">!=</span><span class="WHIT"> </span><span class="STRN">'fill'</span><span class="WHIT"> </span><span class="PUNC">||</span><span class="WHIT"> </span><span class="NAME">n</span><span class="WHIT"> </span><span class="PUNC">==</span><span class="WHIT"> </span><span class="NUMB">1</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 182 <span class='line'>175</span> </span><span class="WHIT">      </span><span class="NAME">context.stroke</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 183 <span class='line'>176</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 184 <span class='line'>177</span>
 185 <span class='line'>178</span> </span><span class="WHIT">    </span><span class="NAME">context.closePath</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 186 <span class='line'>179</span>
 187 <span class='line'>180</span> </span><span class="WHIT">    </span><span class="NAME">needsRedraw</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">false</span><span class="PUNC">;</span><span class="WHIT">
 188 <span class='line'>181</span> </span><span class="WHIT">  </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
 189 <span class='line'>182</span>
 190 <span class='line'>183</span> </span><span class="WHIT">  </span><span class="COMM">/**
 191 <span class='line'>184</span>    * The &lt;code>mouseup&lt;/code> event handler.
 192 <span class='line'>185</span>    *
 193 <span class='line'>186</span>    * @param {Event} ev The DOM Event object.
 194 <span class='line'>187</span>    * @returns {Boolean} True if the event handler executed, or false if not.
 195 <span class='line'>188</span>    */</span><span class="WHIT">
 196 <span class='line'>189</span> </span><span class="WHIT">  </span><span class="NAME">this.mouseup</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">ev</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 197 <span class='line'>190</span> </span><span class="WHIT">    </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">n</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">points.length</span><span class="PUNC">;</span><span class="WHIT">
 198 <span class='line'>191</span>
 199 <span class='line'>192</span> </span><span class="WHIT">    </span><span class="COMM">// Allow click+mousemove+click, not only mousedown+mousemove+mouseup.</span><span class="WHIT">
 200 <span class='line'>193</span> </span><span class="WHIT">    </span><span class="COMM">// Do this only for the first point in the polygon.</span><span class="WHIT">
 201 <span class='line'>194</span> </span><span class="WHIT">    </span><span class="KEYW">if</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">n</span><span class="WHIT"> </span><span class="PUNC">==</span><span class="WHIT"> </span><span class="NUMB">1</span><span class="WHIT"> </span><span class="PUNC">&&</span><span class="WHIT"> </span><span class="NAME">mouse.x</span><span class="WHIT"> </span><span class="PUNC">==</span><span class="WHIT"> </span><span class="NAME">points</span><span class="PUNC">[</span><span class="NAME">n</span><span class="PUNC">-</span><span class="NUMB">1</span><span class="PUNC">]</span><span class="PUNC">[</span><span class="NUMB">0</span><span class="PUNC">]</span><span class="WHIT"> </span><span class="PUNC">&&</span><span class="WHIT"> </span><span class="NAME">mouse.y</span><span class="WHIT"> </span><span class="PUNC">==</span><span class="WHIT"> </span><span class="NAME">points</span><span class="PUNC">[</span><span class="NAME">n</span><span class="PUNC">-</span><span class="NUMB">1</span><span class="PUNC">]</span><span class="PUNC">[</span><span class="NUMB">1</span><span class="PUNC">]</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 202 <span class='line'>195</span> </span><span class="WHIT">      </span><span class="NAME">mouse.buttonDown</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">true</span><span class="PUNC">;</span><span class="WHIT">
 203 <span class='line'>196</span> </span><span class="WHIT">      </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="KEYW">true</span><span class="PUNC">;</span><span class="WHIT">
 204 <span class='line'>197</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 205 <span class='line'>198</span>
 206 <span class='line'>199</span> </span><span class="WHIT">    </span><span class="KEYW">if</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">timer</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 207 <span class='line'>200</span> </span><span class="WHIT">      </span><span class="NAME">clearInterval</span><span class="PUNC">(</span><span class="NAME">timer</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 208 <span class='line'>201</span> </span><span class="WHIT">      </span><span class="NAME">timer</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">null</span><span class="PUNC">;</span><span class="WHIT">
 209 <span class='line'>202</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 210 <span class='line'>203</span>
 211 <span class='line'>204</span> </span><span class="WHIT">    </span><span class="NAME">shiftKey</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">ev.shiftKey</span><span class="PUNC">;</span><span class="WHIT">
 212 <span class='line'>205</span> </span><span class="WHIT">    </span><span class="NAME">needsRedraw</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">true</span><span class="PUNC">;</span><span class="WHIT">
 213 <span class='line'>206</span>
 214 <span class='line'>207</span> </span><span class="WHIT">    </span><span class="KEYW">if</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">ev.shiftKey</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 215 <span class='line'>208</span> </span><span class="WHIT">      </span><span class="NAME">snapXY</span><span class="PUNC">(</span><span class="NAME">points</span><span class="PUNC">[</span><span class="NAME">n</span><span class="PUNC">-</span><span class="NUMB">1</span><span class="PUNC">]</span><span class="PUNC">[</span><span class="NUMB">0</span><span class="PUNC">]</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">points</span><span class="PUNC">[</span><span class="NAME">n</span><span class="PUNC">-</span><span class="NUMB">1</span><span class="PUNC">]</span><span class="PUNC">[</span><span class="NUMB">1</span><span class="PUNC">]</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 216 <span class='line'>209</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 217 <span class='line'>210</span>
 218 <span class='line'>211</span> </span><span class="WHIT">    </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">diffx1</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">MathAbs</span><span class="PUNC">(</span><span class="NAME">mouse.x</span><span class="WHIT"> </span><span class="PUNC">-</span><span class="WHIT"> </span><span class="NAME">points</span><span class="PUNC">[</span><span class="NUMB">0</span><span class="PUNC">]</span><span class="PUNC">[</span><span class="NUMB">0</span><span class="PUNC">]</span><span class="PUNC">)</span><span class="PUNC">,</span><span class="WHIT">
 219 <span class='line'>212</span> </span><span class="WHIT">        </span><span class="NAME">diffy1</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">MathAbs</span><span class="PUNC">(</span><span class="NAME">mouse.y</span><span class="WHIT"> </span><span class="PUNC">-</span><span class="WHIT"> </span><span class="NAME">points</span><span class="PUNC">[</span><span class="NUMB">0</span><span class="PUNC">]</span><span class="PUNC">[</span><span class="NUMB">1</span><span class="PUNC">]</span><span class="PUNC">)</span><span class="PUNC">,</span><span class="WHIT">
 220 <span class='line'>213</span> </span><span class="WHIT">        </span><span class="NAME">diffx2</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">MathAbs</span><span class="PUNC">(</span><span class="NAME">mouse.x</span><span class="WHIT"> </span><span class="PUNC">-</span><span class="WHIT"> </span><span class="NAME">points</span><span class="PUNC">[</span><span class="NAME">n</span><span class="PUNC">-</span><span class="NUMB">1</span><span class="PUNC">]</span><span class="PUNC">[</span><span class="NUMB">0</span><span class="PUNC">]</span><span class="PUNC">)</span><span class="PUNC">,</span><span class="WHIT">
 221 <span class='line'>214</span> </span><span class="WHIT">        </span><span class="NAME">diffy2</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">MathAbs</span><span class="PUNC">(</span><span class="NAME">mouse.y</span><span class="WHIT"> </span><span class="PUNC">-</span><span class="WHIT"> </span><span class="NAME">points</span><span class="PUNC">[</span><span class="NAME">n</span><span class="PUNC">-</span><span class="NUMB">1</span><span class="PUNC">]</span><span class="PUNC">[</span><span class="NUMB">1</span><span class="PUNC">]</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 222 <span class='line'>215</span>
 223 <span class='line'>216</span> </span><span class="WHIT">    </span><span class="COMM">// End the polygon if the new point is close enough to the first/last point.</span><span class="WHIT">
 224 <span class='line'>217</span> </span><span class="WHIT">    </span><span class="KEYW">if</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="PUNC">(</span><span class="NAME">diffx1</span><span class="WHIT"> </span><span class="PUNC">&lt;</span><span class="WHIT"> </span><span class="NUMB">5</span><span class="WHIT"> </span><span class="PUNC">&&</span><span class="WHIT"> </span><span class="NAME">diffy1</span><span class="WHIT"> </span><span class="PUNC">&lt;</span><span class="WHIT"> </span><span class="NUMB">5</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">||</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">diffx2</span><span class="WHIT"> </span><span class="PUNC">&lt;</span><span class="WHIT"> </span><span class="NUMB">5</span><span class="WHIT"> </span><span class="PUNC">&&</span><span class="WHIT"> </span><span class="NAME">diffy2</span><span class="WHIT"> </span><span class="PUNC">&lt;</span><span class="WHIT"> </span><span class="NUMB">5</span><span class="PUNC">)</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 225 <span class='line'>218</span> </span><span class="WHIT">      </span><span class="COMM">// Add the start point to complete the polygon shape.</span><span class="WHIT">
 226 <span class='line'>219</span> </span><span class="WHIT">      </span><span class="NAME">points.push</span><span class="PUNC">(</span><span class="NAME">points</span><span class="PUNC">[</span><span class="NUMB">0</span><span class="PUNC">]</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 227 <span class='line'>220</span>
 228 <span class='line'>221</span> </span><span class="WHIT">      </span><span class="NAME">_self.draw</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 229 <span class='line'>222</span> </span><span class="WHIT">      </span><span class="NAME">points</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="PUNC">[</span><span class="PUNC">]</span><span class="PUNC">;</span><span class="WHIT">
 230 <span class='line'>223</span>
 231 <span class='line'>224</span> </span><span class="WHIT">      </span><span class="NAME">gui.statusShow</span><span class="PUNC">(</span><span class="STRN">'polygonActive'</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 232 <span class='line'>225</span> </span><span class="WHIT">      </span><span class="NAME">app.layerUpdate</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 233 <span class='line'>226</span>
 234 <span class='line'>227</span> </span><span class="WHIT">      </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="KEYW">true</span><span class="PUNC">;</span><span class="WHIT">
 235 <span class='line'>228</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 236 <span class='line'>229</span>
 237 <span class='line'>230</span> </span><span class="WHIT">    </span><span class="KEYW">if</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">n</span><span class="WHIT"> </span><span class="PUNC">></span><span class="WHIT"> </span><span class="NUMB">3</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 238 <span class='line'>231</span> </span><span class="WHIT">      </span><span class="NAME">gui.statusShow</span><span class="PUNC">(</span><span class="STRN">'polygonEnd'</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 239 <span class='line'>232</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT"> </span><span class="KEYW">else</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 240 <span class='line'>233</span> </span><span class="WHIT">      </span><span class="NAME">gui.statusShow</span><span class="PUNC">(</span><span class="STRN">'polygonAddPoint'</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 241 <span class='line'>234</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 242 <span class='line'>235</span>
 243 <span class='line'>236</span> </span><span class="WHIT">    </span><span class="NAME">points.push</span><span class="PUNC">(</span><span class="PUNC">[</span><span class="NAME">mouse.x</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">mouse.y</span><span class="PUNC">]</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 244 <span class='line'>237</span> </span><span class="WHIT">    </span><span class="NAME">_self.draw</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 245 <span class='line'>238</span>
 246 <span class='line'>239</span> </span><span class="WHIT">    </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="KEYW">true</span><span class="PUNC">;</span><span class="WHIT">
 247 <span class='line'>240</span> </span><span class="WHIT">  </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
 248 <span class='line'>241</span>
 249 <span class='line'>242</span> </span><span class="WHIT">  </span><span class="COMM">/**
 250 <span class='line'>243</span>    * The &lt;code>keydown&lt;/code> event handler. This method allows the user to
 251 <span class='line'>244</span>    * cancel drawing the current polygon, using the &lt;kbd>Escape&lt;/kbd> key. The
 252 <span class='line'>245</span>    * &lt;kbd>Enter&lt;/kbd> key can be used to accept the current polygon shape, and
 253 <span class='line'>246</span>    * end the drawing operation.
 254 <span class='line'>247</span>    *
 255 <span class='line'>248</span>    * @param {Event} ev The DOM Event object.
 256 <span class='line'>249</span>    *
 257 <span class='line'>250</span>    * @returns {Boolean} True if the keyboard shortcut was recognized, or false
 258 <span class='line'>251</span>    * if not.
 259 <span class='line'>252</span>    */</span><span class="WHIT">
 260 <span class='line'>253</span> </span><span class="WHIT">  </span><span class="NAME">this.keydown</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">ev</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 261 <span class='line'>254</span> </span><span class="WHIT">    </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">n</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">points.length</span><span class="PUNC">;</span><span class="WHIT">
 262 <span class='line'>255</span> </span><span class="WHIT">    </span><span class="KEYW">if</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="PUNC">!</span><span class="NAME">n</span><span class="WHIT"> </span><span class="PUNC">||</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">ev.kid_</span><span class="WHIT"> </span><span class="PUNC">!=</span><span class="WHIT"> </span><span class="STRN">'Escape'</span><span class="WHIT"> </span><span class="PUNC">&&</span><span class="WHIT"> </span><span class="NAME">ev.kid_</span><span class="WHIT"> </span><span class="PUNC">!=</span><span class="WHIT"> </span><span class="STRN">'Enter'</span><span class="PUNC">)</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 263 <span class='line'>256</span> </span><span class="WHIT">      </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="KEYW">false</span><span class="PUNC">;</span><span class="WHIT">
 264 <span class='line'>257</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 265 <span class='line'>258</span>
 266 <span class='line'>259</span> </span><span class="WHIT">    </span><span class="KEYW">if</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">timer</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 267 <span class='line'>260</span> </span><span class="WHIT">      </span><span class="NAME">clearInterval</span><span class="PUNC">(</span><span class="NAME">timer</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 268 <span class='line'>261</span> </span><span class="WHIT">      </span><span class="NAME">timer</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">null</span><span class="PUNC">;</span><span class="WHIT">
 269 <span class='line'>262</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 270 <span class='line'>263</span> </span><span class="WHIT">    </span><span class="NAME">mouse.buttonDown</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">false</span><span class="PUNC">;</span><span class="WHIT">
 271 <span class='line'>264</span>
 272 <span class='line'>265</span> </span><span class="WHIT">    </span><span class="KEYW">if</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">ev.kid_</span><span class="WHIT"> </span><span class="PUNC">==</span><span class="WHIT"> </span><span class="STRN">'Escape'</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 273 <span class='line'>266</span> </span><span class="WHIT">      </span><span class="NAME">context.clearRect</span><span class="PUNC">(</span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">image.width</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">image.height</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 274 <span class='line'>267</span> </span><span class="WHIT">      </span><span class="NAME">needsRedraw</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">false</span><span class="PUNC">;</span><span class="WHIT">
 275 <span class='line'>268</span>
 276 <span class='line'>269</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT"> </span><span class="KEYW">else</span><span class="WHIT"> </span><span class="KEYW">if</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">ev.kid_</span><span class="WHIT"> </span><span class="PUNC">==</span><span class="WHIT"> </span><span class="STRN">'Enter'</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 277 <span class='line'>270</span> </span><span class="WHIT">      </span><span class="COMM">// Add the point of the last mousemove event, and the start point, to </span><span class="WHIT">
 278 <span class='line'>271</span> </span><span class="WHIT">      </span><span class="COMM">// complete the polygon.</span><span class="WHIT">
 279 <span class='line'>272</span> </span><span class="WHIT">      </span><span class="NAME">points.push</span><span class="PUNC">(</span><span class="PUNC">[</span><span class="NAME">mouse.x</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">mouse.y</span><span class="PUNC">]</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 280 <span class='line'>273</span> </span><span class="WHIT">      </span><span class="NAME">points.push</span><span class="PUNC">(</span><span class="NAME">points</span><span class="PUNC">[</span><span class="NUMB">0</span><span class="PUNC">]</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 281 <span class='line'>274</span> </span><span class="WHIT">      </span><span class="NAME">needsRedraw</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">true</span><span class="PUNC">;</span><span class="WHIT">
 282 <span class='line'>275</span> </span><span class="WHIT">      </span><span class="NAME">_self.draw</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 283 <span class='line'>276</span> </span><span class="WHIT">      </span><span class="NAME">app.layerUpdate</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 284 <span class='line'>277</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 285 <span class='line'>278</span>
 286 <span class='line'>279</span> </span><span class="WHIT">    </span><span class="NAME">points</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="PUNC">[</span><span class="PUNC">]</span><span class="PUNC">;</span><span class="WHIT">
 287 <span class='line'>280</span> </span><span class="WHIT">    </span><span class="NAME">gui.statusShow</span><span class="PUNC">(</span><span class="STRN">'polygonActive'</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 288 <span class='line'>281</span>
 289 <span class='line'>282</span> </span><span class="WHIT">    </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="KEYW">true</span><span class="PUNC">;</span><span class="WHIT">
 290 <span class='line'>283</span> </span><span class="WHIT">  </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
 291 <span class='line'>284</span> </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
 292 <span class='line'>285</span>
 293 <span class='line'>286</span> </span><span class="COMM">// vim:set spell spl=en fo=wan1croqlt tw=80 ts=2 sw=2 sts=2 sta et ai cin fenc=utf-8 ff=unix:</span><span class="WHIT">
 294 <span class='line'>287</span>
 295 <span class='line'>288</span> </span></pre></body></html>