lib/paintweb/docs/api-ref/symbols/src/src_tools_line.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;}
   5         .STRN {color: #393;}
   6         .REGX {color: #339;}
   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 20:23:04 +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 line 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 line 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.line</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">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">
  48 <span class='line'> 41</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">
  49 <span class='line'> 42</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">
  50 <span class='line'> 43</span>
  51 <span class='line'> 44</span> </span><span class="WHIT">  </span><span class="COMM">/**
  52 <span class='line'> 45</span>    * The interval ID used for invoking the drawing operation every few
  53 <span class='line'> 46</span>    * milliseconds.
  54 <span class='line'> 47</span>    *
  55 <span class='line'> 48</span>    * @private
  56 <span class='line'> 49</span>    * @see PaintWeb.config.toolDrawDelay
  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">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">
  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>    * Tells if the &lt;kbd>Shift&lt;/kbd> key is down or not. This is used by the
  62 <span class='line'> 55</span>    * drawing function.
  63 <span class='line'> 56</span>    *
  64 <span class='line'> 57</span>    * @private
  65 <span class='line'> 58</span>    * @type Boolean
  66 <span class='line'> 59</span>    * @default false
  67 <span class='line'> 60</span>    */</span><span class="WHIT">
  68 <span class='line'> 61</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">
  69 <span class='line'> 62</span>
  70 <span class='line'> 63</span> </span><span class="WHIT">  </span><span class="COMM">/**
  71 <span class='line'> 64</span>    * Tells if the drawing canvas needs to be updated or not.
  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">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">
  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>    * Holds the starting point on the &lt;var>x&lt;/var> axis of the image, for the
  81 <span class='line'> 74</span>    * current drawing operation.
  82 <span class='line'> 75</span>    *
  83 <span class='line'> 76</span>    * @private
  84 <span class='line'> 77</span>    * @type Number
  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">x0</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">
  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>    * Holds the starting point on the &lt;var>y&lt;/var> axis of the image, for the
  90 <span class='line'> 83</span>    * current drawing operation.
  91 <span class='line'> 84</span>    *
  92 <span class='line'> 85</span>    * @private
  93 <span class='line'> 86</span>    * @type Number
  94 <span class='line'> 87</span>    */</span><span class="WHIT">
  95 <span class='line'> 88</span> </span><span class="WHIT">  </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">y0</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">
  96 <span class='line'> 89</span>
  97 <span class='line'> 90</span> </span><span class="WHIT">  </span><span class="COMM">/**
  98 <span class='line'> 91</span>    * Tool deactivation event handler.
  99 <span class='line'> 92</span>    */</span><span class="WHIT">
 100 <span class='line'> 93</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">
 101 <span class='line'> 94</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">
 102 <span class='line'> 95</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">
 103 <span class='line'> 96</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">
 104 <span class='line'> 97</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 105 <span class='line'> 98</span>
 106 <span class='line'> 99</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">
 107 <span class='line'>100</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">
 108 <span class='line'>101</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 109 <span class='line'>102</span>
 110 <span class='line'>103</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">
 111 <span class='line'>104</span>
 112 <span class='line'>105</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">
 113 <span class='line'>106</span> </span><span class="WHIT">  </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
 114 <span class='line'>107</span>
 115 <span class='line'>108</span> </span><span class="WHIT">  </span><span class="COMM">/**
 116 <span class='line'>109</span>    * Initialize the drawing operation, by storing the location of the pointer,
 117 <span class='line'>110</span>    * the start position.
 118 <span class='line'>111</span>    *
 119 <span class='line'>112</span>    * @param {Event} ev The DOM Event object.
 120 <span class='line'>113</span>    */</span><span class="WHIT">
 121 <span class='line'>114</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">
 122 <span class='line'>115</span> </span><span class="WHIT">    </span><span class="NAME">x0</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">mouse.x</span><span class="PUNC">;</span><span class="WHIT">
 123 <span class='line'>116</span> </span><span class="WHIT">    </span><span class="NAME">y0</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">mouse.y</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="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">
 126 <span class='line'>119</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">
 127 <span class='line'>120</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 128 <span class='line'>121</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">
 129 <span class='line'>122</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">
 130 <span class='line'>123</span>
 131 <span class='line'>124</span> </span><span class="WHIT">    </span><span class="NAME">gui.statusShow</span><span class="PUNC">(</span><span class="STRN">'lineMousedown'</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 132 <span class='line'>125</span>
 133 <span class='line'>126</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">
 134 <span class='line'>127</span> </span><span class="WHIT">  </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
 135 <span class='line'>128</span>
 136 <span class='line'>129</span> </span><span class="WHIT">  </span><span class="COMM">/**
 137 <span class='line'>130</span>    * Store the &lt;kbd>Shift&lt;/kbd> key state which is used by the drawing function.
 138 <span class='line'>131</span>    *
 139 <span class='line'>132</span>    * @param {Event} ev The DOM Event object.
 140 <span class='line'>133</span>    */</span><span class="WHIT">
 141 <span class='line'>134</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">
 142 <span class='line'>135</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">
 143 <span class='line'>136</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">
 144 <span class='line'>137</span> </span><span class="WHIT">  </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
 145 <span class='line'>138</span>
 146 <span class='line'>139</span> </span><span class="WHIT">  </span><span class="COMM">/**
 147 <span class='line'>140</span>    * Perform the drawing operation. This function is called every few
 148 <span class='line'>141</span>    * milliseconds.
 149 <span class='line'>142</span>    *
 150 <span class='line'>143</span>    * &lt;p>Hold down the &lt;kbd>Shift&lt;/kbd> key to draw a straight
 151 <span class='line'>144</span>    * horizontal/vertical line.
 152 <span class='line'>145</span>    * &lt;p>Press &lt;kbd>Escape&lt;/kbd> to cancel the drawing operation.
 153 <span class='line'>146</span>    *
 154 <span class='line'>147</span>    * @see PaintWeb.config.toolDrawDelay
 155 <span class='line'>148</span>    */</span><span class="WHIT">
 156 <span class='line'>149</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="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 157 <span class='line'>150</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">
 158 <span class='line'>151</span> </span><span class="WHIT">      </span><span class="KEYW">return</span><span class="PUNC">;</span><span class="WHIT">
 159 <span class='line'>152</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 160 <span class='line'>153</span>
 161 <span class='line'>154</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">
 162 <span class='line'>155</span>
 163 <span class='line'>156</span> </span><span class="WHIT">    </span><span class="COMM">// Snapping on the X/Y axis.</span><span class="WHIT">
 164 <span class='line'>157</span> </span><span class="WHIT">    </span><span class="KEYW">if</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">shiftKey</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 165 <span class='line'>158</span> </span><span class="WHIT">      </span><span class="NAME">snapXY</span><span class="PUNC">(</span><span class="NAME">x0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">y0</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 166 <span class='line'>159</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 167 <span class='line'>160</span>
 168 <span class='line'>161</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">
 169 <span class='line'>162</span> </span><span class="WHIT">    </span><span class="NAME">context.moveTo</span><span class="PUNC">(</span><span class="NAME">x0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">y0</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 170 <span class='line'>163</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">
 171 <span class='line'>164</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">
 172 <span class='line'>165</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">
 173 <span class='line'>166</span>
 174 <span class='line'>167</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">
 175 <span class='line'>168</span> </span><span class="WHIT">  </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
 176 <span class='line'>169</span>
 177 <span class='line'>170</span> </span><span class="WHIT">  </span><span class="COMM">/**
 178 <span class='line'>171</span>    * End the drawing operation, once the user releases the mouse button.
 179 <span class='line'>172</span>    *
 180 <span class='line'>173</span>    * @param {Event} ev The DOM Event object.
 181 <span class='line'>174</span>    */</span><span class="WHIT">
 182 <span class='line'>175</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">
 183 <span class='line'>176</span> </span><span class="WHIT">    </span><span class="COMM">// Allow users to click then drag, not only mousedown+drag+mouseup.</span><span class="WHIT">
 184 <span class='line'>177</span> </span><span class="WHIT">    </span><span class="KEYW">if</span><span class="WHIT"> </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">x0</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">y0</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 185 <span class='line'>178</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">
 186 <span class='line'>179</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">
 187 <span class='line'>180</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 188 <span class='line'>181</span>
 189 <span class='line'>182</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">
 190 <span class='line'>183</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">
 191 <span class='line'>184</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">
 192 <span class='line'>185</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 193 <span class='line'>186</span>
 194 <span class='line'>187</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">
 195 <span class='line'>188</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">
 196 <span class='line'>189</span> </span><span class="WHIT">    </span><span class="NAME">gui.statusShow</span><span class="PUNC">(</span><span class="STRN">'lineActive'</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 197 <span class='line'>190</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">
 198 <span class='line'>191</span>
 199 <span class='line'>192</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">
 200 <span class='line'>193</span> </span><span class="WHIT">  </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
 201 <span class='line'>194</span>
 202 <span class='line'>195</span> </span><span class="WHIT">  </span><span class="COMM">/**
 203 <span class='line'>196</span>    * Allows the user to press &lt;kbd>Escape&lt;/kbd> to cancel the drawing operation.
 204 <span class='line'>197</span>    *
 205 <span class='line'>198</span>    * @param {Event} ev The DOM Event object.
 206 <span class='line'>199</span>    *
 207 <span class='line'>200</span>    * @returns {Boolean} True if the drawing operation was cancelled, or false if
 208 <span class='line'>201</span>    * not.
 209 <span class='line'>202</span>    */</span><span class="WHIT">
 210 <span class='line'>203</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">
 211 <span class='line'>204</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">mouse.buttonDown</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">'Escape'</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 212 <span class='line'>205</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">
 213 <span class='line'>206</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 214 <span class='line'>207</span>
 215 <span class='line'>208</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">
 216 <span class='line'>209</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">
 217 <span class='line'>210</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">
 218 <span class='line'>211</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 219 <span class='line'>212</span>
 220 <span class='line'>213</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">
 221 <span class='line'>214</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">
 222 <span class='line'>215</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">
 223 <span class='line'>216</span>
 224 <span class='line'>217</span> </span><span class="WHIT">    </span><span class="NAME">gui.statusShow</span><span class="PUNC">(</span><span class="STRN">'lineActive'</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 225 <span class='line'>218</span>
 226 <span class='line'>219</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">
 227 <span class='line'>220</span> </span><span class="WHIT">  </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
 228 <span class='line'>221</span> </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
 229 <span class='line'>222</span>
 230 <span class='line'>223</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">
 231 <span class='line'>224</span>
 232 <span class='line'>225</span> </span></pre></body></html>