lib/paintweb/docs/api-ref/symbols/src/src_tools_hand.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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   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: 2009-06-15 20:27:08 +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 hand 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 hand tool. This tool allows the user to drag the image canvas
  37 <span class='line'> 30</span>  * inside the viewport.
  38 <span class='line'> 31</span>  *
  39 <span class='line'> 32</span>  * @param {PaintWeb} app Reference to the main paint application object.
  40 <span class='line'> 33</span>  */</span><span class="WHIT">
  41 <span class='line'> 34</span> </span><span class="NAME">pwlib.tools.hand</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">
  42 <span class='line'> 35</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">
  43 <span class='line'> 36</span> </span><span class="WHIT">      </span><span class="NAME">bufferCanvas</span><span class="WHIT">  </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">app.buffer.canvas</span><span class="PUNC">,</span><span class="WHIT">
  44 <span class='line'> 37</span> </span><span class="WHIT">      </span><span class="NAME">bufferStyle</span><span class="WHIT">   </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">bufferCanvas.style</span><span class="PUNC">,</span><span class="WHIT">
  45 <span class='line'> 38</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">
  46 <span class='line'> 39</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">
  47 <span class='line'> 40</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">
  48 <span class='line'> 41</span> </span><span class="WHIT">      </span><span class="NAME">MathRound</span><span class="WHIT">     </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">Math.round</span><span class="PUNC">,</span><span class="WHIT">
  49 <span class='line'> 42</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">
  50 <span class='line'> 43</span> </span><span class="WHIT">      </span><span class="NAME">viewport</span><span class="WHIT">      </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">app.gui.elems.viewport</span><span class="PUNC">,</span><span class="WHIT">
  51 <span class='line'> 44</span> </span><span class="WHIT">      </span><span class="NAME">vheight</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">
  52 <span class='line'> 45</span> </span><span class="WHIT">      </span><span class="NAME">vwidth</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">
  53 <span class='line'> 46</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">
  54 <span class='line'> 47</span>
  55 <span class='line'> 48</span> </span><span class="WHIT">  </span><span class="COMM">/**
  56 <span class='line'> 49</span>    * The interval ID used for invoking the viewport drag operation every few
  57 <span class='line'> 50</span>    * milliseconds.
  58 <span class='line'> 51</span>    *
  59 <span class='line'> 52</span>    * @private
  60 <span class='line'> 53</span>    * @see PaintWeb.config.toolDrawDelay
  61 <span class='line'> 54</span>    */</span><span class="WHIT">
  62 <span class='line'> 55</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">
  63 <span class='line'> 56</span>
  64 <span class='line'> 57</span> </span><span class="WHIT">  </span><span class="COMM">/**
  65 <span class='line'> 58</span>    * Tells if the viewport needs to be scrolled.
  66 <span class='line'> 59</span>    *
  67 <span class='line'> 60</span>    * @private
  68 <span class='line'> 61</span>    * @type Boolean
  69 <span class='line'> 62</span>    * @default false
  70 <span class='line'> 63</span>    */</span><span class="WHIT">
  71 <span class='line'> 64</span> </span><span class="WHIT">  </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">needsScroll</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">
  72 <span class='line'> 65</span>
  73 <span class='line'> 66</span> </span><span class="WHIT">  </span><span class="COMM">/**
  74 <span class='line'> 67</span>    * Holds the previous tool ID.
  75 <span class='line'> 68</span>    *
  76 <span class='line'> 69</span>    * @private
  77 <span class='line'> 70</span>    * @type String
  78 <span class='line'> 71</span>    */</span><span class="WHIT">
  79 <span class='line'> 72</span> </span><span class="WHIT">  </span><span class="NAME">this.prevTool</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">
  80 <span class='line'> 73</span>
  81 <span class='line'> 74</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"> </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">
  82 <span class='line'> 75</span> </span><span class="WHIT">      </span><span class="NAME">x1</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">y1</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">
  83 <span class='line'> 76</span> </span><span class="WHIT">      </span><span class="NAME">l0</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">t0</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">
  84 <span class='line'> 77</span>
  85 <span class='line'> 78</span> </span><span class="WHIT">  </span><span class="COMM">/**
  86 <span class='line'> 79</span>    * Tool preactivation event handler.
  87 <span class='line'> 80</span>    *
  88 <span class='line'> 81</span>    * @returns {Boolean} True if the tool can become active, or false if not.
  89 <span class='line'> 82</span>    */</span><span class="WHIT">
  90 <span class='line'> 83</span> </span><span class="WHIT">  </span><span class="NAME">this.preActivate</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">
  91 <span class='line'> 84</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">viewport</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">return</span><span class="WHIT"> </span><span class="KEYW">false</span><span class="PUNC">;</span><span class="WHIT">
  93 <span class='line'> 86</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
  94 <span class='line'> 87</span>
  95 <span class='line'> 88</span> </span><span class="WHIT">    </span><span class="NAME">_self.prevTool</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">app.tool._id</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">// Check if the image canvas can be scrolled within the viewport.</span><span class="WHIT">
  98 <span class='line'> 91</span>
  99 <span class='line'> 92</span> </span><span class="WHIT">    </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">cs</span><span class="WHIT">      </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">app.win.getComputedStyle</span><span class="PUNC">(</span><span class="NAME">viewport</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="KEYW">null</span><span class="PUNC">)</span><span class="PUNC">,</span><span class="WHIT">
 100 <span class='line'> 93</span> </span><span class="WHIT">        </span><span class="NAME">bwidth</span><span class="WHIT">  </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">parseInt</span><span class="PUNC">(</span><span class="NAME">bufferStyle.width</span><span class="PUNC">)</span><span class="PUNC">,</span><span class="WHIT">
 101 <span class='line'> 94</span> </span><span class="WHIT">        </span><span class="NAME">bheight</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">parseInt</span><span class="PUNC">(</span><span class="NAME">bufferStyle.height</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 102 <span class='line'> 95</span>
 103 <span class='line'> 96</span> </span><span class="WHIT">    </span><span class="NAME">vwidth</span><span class="WHIT">  </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">parseInt</span><span class="PUNC">(</span><span class="NAME">cs.width</span><span class="PUNC">)</span><span class="PUNC">,</span><span class="WHIT">
 104 <span class='line'> 97</span> </span><span class="WHIT">    </span><span class="NAME">vheight</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">parseInt</span><span class="PUNC">(</span><span class="NAME">cs.height</span><span class="PUNC">)</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">vheight</span><span class="WHIT"> </span><span class="PUNC">&lt;</span><span class="WHIT"> </span><span class="NAME">bheight</span><span class="WHIT"> </span><span class="PUNC">||</span><span class="WHIT"> </span><span class="NAME">vwidth</span><span class="WHIT"> </span><span class="PUNC">&lt;</span><span class="WHIT"> </span><span class="NAME">bwidth</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="KEYW">return</span><span class="WHIT"> </span><span class="KEYW">true</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"> </span><span class="KEYW">else</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 109 <span class='line'>102</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">
 110 <span class='line'>103</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 111 <span class='line'>104</span> </span><span class="WHIT">  </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
 112 <span class='line'>105</span>
 113 <span class='line'>106</span> </span><span class="WHIT">  </span><span class="COMM">/**
 114 <span class='line'>107</span>    * Tool activation event handler.
 115 <span class='line'>108</span>    */</span><span class="WHIT">
 116 <span class='line'>109</span> </span><span class="WHIT">  </span><span class="NAME">this.activate</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">
 117 <span class='line'>110</span> </span><span class="WHIT">    </span><span class="NAME">bufferStyle.cursor</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="STRN">'move'</span><span class="PUNC">;</span><span class="WHIT">
 118 <span class='line'>111</span> </span><span class="WHIT">    </span><span class="NAME">app.shadowDisallow</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 119 <span class='line'>112</span> </span><span class="WHIT">  </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
 120 <span class='line'>113</span>
 121 <span class='line'>114</span> </span><span class="WHIT">  </span><span class="COMM">/**
 122 <span class='line'>115</span>    * Tool deactivation event handler.
 123 <span class='line'>116</span>    */</span><span class="WHIT">
 124 <span class='line'>117</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="NAME">ev</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 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="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">clearInterval</span><span class="PUNC">(</span><span class="NAME">timer</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="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">
 128 <span class='line'>121</span> </span><span class="WHIT">      </span><span class="NAME">app.doc.removeEventListener</span><span class="PUNC">(</span><span class="STRN">'mousemove'</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">ev_mousemove</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="KEYW">false</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 129 <span class='line'>122</span> </span><span class="WHIT">      </span><span class="NAME">app.doc.removeEventListener</span><span class="PUNC">(</span><span class="STRN">'mouseup'</span><span class="PUNC">,</span><span class="WHIT">   </span><span class="NAME">ev_mouseup</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="KEYW">false</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 130 <span class='line'>123</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 131 <span class='line'>124</span>
 132 <span class='line'>125</span> </span><span class="WHIT">    </span><span class="NAME">bufferStyle.cursor</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="STRN">''</span><span class="PUNC">;</span><span class="WHIT">
 133 <span class='line'>126</span> </span><span class="WHIT">    </span><span class="NAME">app.shadowAllow</span><span class="PUNC">(</span><span class="PUNC">)</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>    * Initialize the canvas drag.
 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.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">
 142 <span class='line'>135</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">ev.clientX</span><span class="PUNC">;</span><span class="WHIT">
 143 <span class='line'>136</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">ev.clientY</span><span class="PUNC">;</span><span class="WHIT">
 144 <span class='line'>137</span> </span><span class="WHIT">    </span><span class="NAME">l0</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">viewport.scrollLeft</span><span class="PUNC">;</span><span class="WHIT">
 145 <span class='line'>138</span> </span><span class="WHIT">    </span><span class="NAME">t0</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">viewport.scrollTop</span><span class="PUNC">;</span><span class="WHIT">
 146 <span class='line'>139</span>
 147 <span class='line'>140</span> </span><span class="WHIT">    </span><span class="NAME">needsScroll</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">
 148 <span class='line'>141</span>
 149 <span class='line'>142</span> </span><span class="WHIT">    </span><span class="NAME">app.doc.addEventListener</span><span class="PUNC">(</span><span class="STRN">'mousemove'</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">ev_mousemove</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="KEYW">false</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 150 <span class='line'>143</span> </span><span class="WHIT">    </span><span class="NAME">app.doc.addEventListener</span><span class="PUNC">(</span><span class="STRN">'mouseup'</span><span class="PUNC">,</span><span class="WHIT">   </span><span class="NAME">ev_mouseup</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="KEYW">false</span><span class="PUNC">)</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">timer</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">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">viewportScroll</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">
 154 <span class='line'>147</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 155 <span class='line'>148</span>
 156 <span class='line'>149</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">
 157 <span class='line'>150</span> </span><span class="WHIT">  </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
 158 <span class='line'>151</span>
 159 <span class='line'>152</span> </span><span class="WHIT">  </span><span class="COMM">/**
 160 <span class='line'>153</span>    * The &lt;code>mousemove&lt;/code> event handler. This simply stores the current
 161 <span class='line'>154</span>    * mouse location.
 162 <span class='line'>155</span>    *
 163 <span class='line'>156</span>    * @param {Event} ev The DOM Event object.
 164 <span class='line'>157</span>    */</span><span class="WHIT">
 165 <span class='line'>158</span> </span><span class="WHIT">  </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="NAME">ev_mousemove</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">
 166 <span class='line'>159</span> </span><span class="WHIT">    </span><span class="NAME">x1</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">ev.clientX</span><span class="PUNC">;</span><span class="WHIT">
 167 <span class='line'>160</span> </span><span class="WHIT">    </span><span class="NAME">y1</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">ev.clientY</span><span class="PUNC">;</span><span class="WHIT">
 168 <span class='line'>161</span> </span><span class="WHIT">    </span><span class="NAME">needsScroll</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">
 169 <span class='line'>162</span> </span><span class="WHIT">  </span><span class="PUNC">}</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="COMM">/**
 172 <span class='line'>165</span>    * Perform the canvas drag operation. This function is called every few
 173 <span class='line'>166</span>    * milliseconds.
 174 <span class='line'>167</span>    *
 175 <span class='line'>168</span>    * &lt;p>Press &lt;kbd>Escape&lt;/kbd> to stop dragging and to get back to the previous
 176 <span class='line'>169</span>    * tool.
 177 <span class='line'>170</span>    */</span><span class="WHIT">
 178 <span class='line'>171</span> </span><span class="WHIT">  </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="NAME">viewportScroll</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 179 <span class='line'>172</span> </span><span class="WHIT">    </span><span class="KEYW">if</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">needsScroll</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
 180 <span class='line'>173</span> </span><span class="WHIT">      </span><span class="NAME">viewport.scrollTop</span><span class="WHIT">  </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">t0</span><span class="WHIT"> </span><span class="PUNC">-</span><span class="WHIT"> </span><span class="NAME">y1</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">
 181 <span class='line'>174</span> </span><span class="WHIT">      </span><span class="NAME">viewport.scrollLeft</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">l0</span><span class="WHIT"> </span><span class="PUNC">-</span><span class="WHIT"> </span><span class="NAME">x1</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NAME">x0</span><span class="PUNC">;</span><span class="WHIT">
 182 <span class='line'>175</span> </span><span class="WHIT">      </span><span class="NAME">needsScroll</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">
 183 <span class='line'>176</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 184 <span class='line'>177</span> </span><span class="WHIT">  </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
 185 <span class='line'>178</span>
 186 <span class='line'>179</span> </span><span class="WHIT">  </span><span class="COMM">/**
 187 <span class='line'>180</span>    * The &lt;code>mouseup&lt;/code> event handler.
 188 <span class='line'>181</span>    */</span><span class="WHIT">
 189 <span class='line'>182</span> </span><span class="WHIT">  </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="NAME">ev_mouseup</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">
 190 <span class='line'>183</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">
 191 <span class='line'>184</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">
 192 <span class='line'>185</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">
 193 <span class='line'>186</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 194 <span class='line'>187</span>
 195 <span class='line'>188</span> </span><span class="WHIT">    </span><span class="NAME">ev_mousemove</span><span class="PUNC">(</span><span class="NAME">ev</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">viewportScroll</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 197 <span class='line'>190</span>
 198 <span class='line'>191</span> </span><span class="WHIT">    </span><span class="NAME">app.doc.removeEventListener</span><span class="PUNC">(</span><span class="STRN">'mousemove'</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">ev_mousemove</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="KEYW">false</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 199 <span class='line'>192</span> </span><span class="WHIT">    </span><span class="NAME">app.doc.removeEventListener</span><span class="PUNC">(</span><span class="STRN">'mouseup'</span><span class="PUNC">,</span><span class="WHIT">   </span><span class="NAME">ev_mouseup</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="KEYW">false</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 200 <span class='line'>193</span>
 201 <span class='line'>194</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">
 202 <span class='line'>195</span> </span><span class="WHIT">  </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
 203 <span class='line'>196</span>
 204 <span class='line'>197</span> </span><span class="WHIT">  </span><span class="COMM">/**
 205 <span class='line'>198</span>    * Allows the user to press &lt;kbd>Escape&lt;/kbd> to stop dragging the canvas, and
 206 <span class='line'>199</span>    * to return to the previous tool.
 207 <span class='line'>200</span>    *
 208 <span class='line'>201</span>    * @param {Event} ev The DOM Event object.
 209 <span class='line'>202</span>    *
 210 <span class='line'>203</span>    * @returns {Boolean} True if the key was recognized, or false if not.
 211 <span class='line'>204</span>    */</span><span class="WHIT">
 212 <span class='line'>205</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">
 213 <span class='line'>206</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">_self.prevTool</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">
 214 <span class='line'>207</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">
 215 <span class='line'>208</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
 216 <span class='line'>209</span>
 217 <span class='line'>210</span> </span><span class="WHIT">    </span><span class="NAME">app.toolActivate</span><span class="PUNC">(</span><span class="NAME">_self.prevTool</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">ev</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
 218 <span class='line'>211</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">
 219 <span class='line'>212</span> </span><span class="WHIT">  </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
 220 <span class='line'>213</span> </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
 221 <span class='line'>214</span>
 222 <span class='line'>215</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">
 223 <span class='line'>216</span>
 224 <span class='line'>217</span> </span></pre></body></html>