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layout_Stack.js.html

layout_Stack.js.html 12 KB
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  1. <html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"> <style>
    2. 

  2. 	.KEYW {color: #933;}
    3. 

  3. 	.COMM {color: #bbb; font-style: italic;}
    4. 

  4. 	.NUMB {color: #393;}
    5. 

  5. 	.STRN {color: #393;}
    6. 

  6. 	.REGX {color: #339;}
    7. 

  7. 	.line {border-right: 1px dotted #666; color: #666; font-style: normal;}
    8. 

  8. 	</style></head><body><pre><span class='line'>  1</span> <span class="COMM">/**
    9. 

  9. <span class='line'>  2</span>  * Returns a new stack layout.
    10. 

  10. <span class='line'>  3</span>  *
    11. 

  11. <span class='line'>  4</span>  * @class A layout for stacking marks vertically or horizontally, using the
    12. 

  12. <span class='line'>  5</span>  * &lt;i>cousin&lt;/i> instance. This layout is designed to be used for one of the
    13. 

  13. <span class='line'>  6</span>  * four positional properties in the box model, and changes behavior depending
    14. 

  14. <span class='line'>  7</span>  * on the property being evaluated:&lt;ul>
    15. 

  15. <span class='line'>  8</span>  *
    16. 

  16. <span class='line'>  9</span>  * &lt;li>bottom: cousin.bottom + cousin.height
    17. 

  17. <span class='line'> 10</span>  * &lt;li>top: cousin.top + cousin.height
    18. 

  18. <span class='line'> 11</span>  * &lt;li>left: cousin.left + cousin.width
    19. 

  19. <span class='line'> 12</span>  * &lt;li>right: cousin.right + cousin.width
    20. 

  20. <span class='line'> 13</span>  *
    21. 

  21. <span class='line'> 14</span>  * &lt;/ul>If no cousin instance is available (for example, for first instance),
    22. 

  22. <span class='line'> 15</span>  * the specified offset is used. If no offset is specified, zero is used. For
    23. 

  23. <span class='line'> 16</span>  * example,
    24. 

  24. <span class='line'> 17</span>  *
    25. 

  25. <span class='line'> 18</span>  * &lt;pre>new pv.Panel()
    26. 

  26. <span class='line'> 19</span>  *     .width(150).height(150)
    27. 

  27. <span class='line'> 20</span>  *   .add(pv.Panel)
    28. 

  28. <span class='line'> 21</span>  *     .data([[1, 1.2, 1.7, 1.5, 1.7],
    29. 

  29. <span class='line'> 22</span>  *            [.5, 1, .8, 1.1, 1.3],
    30. 

  30. <span class='line'> 23</span>  *            [.2, .5, .8, .9, 1]])
    31. 

  31. <span class='line'> 24</span>  *   .add(pv.Area)
    32. 

  32. <span class='line'> 25</span>  *     .data(function(d) d)
    33. 

  33. <span class='line'> 26</span>  *     .bottom(pv.Layout.stack())
    34. 

  34. <span class='line'> 27</span>  *     .height(function(d) d * 40)
    35. 

  35. <span class='line'> 28</span>  *     .left(function() this.index * 35)
    36. 

  36. <span class='line'> 29</span>  *   .root.render();&lt;/pre>
    37. 

  37. <span class='line'> 30</span>  *
    38. 

  38. <span class='line'> 31</span>  * specifies a vertically-stacked area chart.
    39. 

  39. <span class='line'> 32</span>  *
    40. 

  40. <span class='line'> 33</span>  * @returns {pv.Layout.stack} a stack property function.
    41. 

  41. <span class='line'> 34</span>  * @see pv.Mark#cousin
    42. 

  42. <span class='line'> 35</span>  */</span><span class="WHIT">
    43. 

  43. <span class='line'> 36</span> </span><span class="NAME">pv.Layout.stack</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
    44. 

  44. <span class='line'> 37</span> </span><span class="WHIT">  </span><span class="COMM">/** @private */</span><span class="WHIT">
    45. 

  45. <span class='line'> 38</span> </span><span class="WHIT">  </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">offset</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT"> </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">;</span><span class="WHIT"> </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
    46. 

  46. <span class='line'> 39</span> 
    47. 

  47. <span class='line'> 40</span> </span><span class="WHIT">  </span><span class="COMM">/** @private */</span><span class="WHIT">
    48. 

  48. <span class='line'> 41</span> </span><span class="WHIT">  </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="NAME">layout</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
    49. 

  49. <span class='line'> 42</span> 
    50. 

  50. <span class='line'> 43</span> </span><span class="WHIT">    </span><span class="COMM">/* Find the previous visible parent instance. */</span><span class="WHIT">
    51. 

  51. <span class='line'> 44</span> </span><span class="WHIT">    </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="NAME">this.parent.index</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">p</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">c</span><span class="PUNC">;</span><span class="WHIT">
    52. 

  52. <span class='line'> 45</span> </span><span class="WHIT">    </span><span class="KEYW">while</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="PUNC">(</span><span class="NAME">i</span><span class="PUNC">--</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"> </span><span class="PUNC">!</span><span class="NAME">c</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
    53. 

  53. <span class='line'> 46</span> </span><span class="WHIT">      </span><span class="NAME">p</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">this.parent.scene</span><span class="PUNC">[</span><span class="NAME">i</span><span class="PUNC">]</span><span class="PUNC">;</span><span class="WHIT">
    54. 

  54. <span class='line'> 47</span> </span><span class="WHIT">      </span><span class="KEYW">if</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">p.visible</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="NAME">c</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">p.children</span><span class="PUNC">[</span><span class="NAME">this.childIndex</span><span class="PUNC">]</span><span class="PUNC">[</span><span class="NAME">this.index</span><span class="PUNC">]</span><span class="PUNC">;</span><span class="WHIT">
    55. 

  55. <span class='line'> 48</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
    56. 

  56. <span class='line'> 49</span> 
    57. 

  57. <span class='line'> 50</span> </span><span class="WHIT">    </span><span class="KEYW">if</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">c</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
    58. 

  58. <span class='line'> 51</span> </span><span class="WHIT">      </span><span class="KEYW">switch</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">property</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
    59. 

  59. <span class='line'> 52</span> </span><span class="WHIT">        </span><span class="KEYW">case</span><span class="WHIT"> </span><span class="STRN">"bottom"</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">c.bottom</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NAME">c.height</span><span class="PUNC">;</span><span class="WHIT">
    60. 

  60. <span class='line'> 53</span> </span><span class="WHIT">        </span><span class="KEYW">case</span><span class="WHIT"> </span><span class="STRN">"top"</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">c.top</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NAME">c.height</span><span class="PUNC">;</span><span class="WHIT">
    61. 

  61. <span class='line'> 54</span> </span><span class="WHIT">        </span><span class="KEYW">case</span><span class="WHIT"> </span><span class="STRN">"left"</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">c.left</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NAME">c.width</span><span class="PUNC">;</span><span class="WHIT">
    62. 

  62. <span class='line'> 55</span> </span><span class="WHIT">        </span><span class="KEYW">case</span><span class="WHIT"> </span><span class="STRN">"right"</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">c.right</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NAME">c.width</span><span class="PUNC">;</span><span class="WHIT">
    63. 

  63. <span class='line'> 56</span> </span><span class="WHIT">      </span><span class="PUNC">}</span><span class="WHIT">
    64. 

  64. <span class='line'> 57</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
    65. 

  65. <span class='line'> 58</span> 
    66. 

  66. <span class='line'> 59</span> </span><span class="WHIT">    </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">offset.apply</span><span class="PUNC">(</span><span class="KEYW">this</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">arguments</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
    67. 

  67. <span class='line'> 60</span> </span><span class="WHIT">  </span><span class="PUNC">}</span><span class="WHIT">
    68. 

  68. <span class='line'> 61</span> 
    69. 

  69. <span class='line'> 62</span> </span><span class="WHIT">  </span><span class="COMM">/**
    70. 

  70. <span class='line'> 63</span>    * Sets the offset for this stack layout. The offset can either be specified
    71. 

  71. <span class='line'> 64</span>    * as a function or as a constant. If a function, the function is invoked in
    72. 

  72. <span class='line'> 65</span>    * the same context as a normal property function: &lt;tt>this&lt;/tt> refers to the
    73. 

  73. <span class='line'> 66</span>    * mark, and the arguments are the full data stack. By default the offset is
    74. 

  74. <span class='line'> 67</span>    * zero.
    75. 

  75. <span class='line'> 68</span>    *
    76. 

  76. <span class='line'> 69</span>    * @function
    77. 

  77. <span class='line'> 70</span>    * @name pv.Layout.stack.prototype.offset
    78. 

  78. <span class='line'> 71</span>    * @param {function} f offset function, or constant value.
    79. 

  79. <span class='line'> 72</span>    * @returns {pv.Layout.stack} this.
    80. 

  80. <span class='line'> 73</span>    */</span><span class="WHIT">
    81. 

  81. <span class='line'> 74</span> </span><span class="WHIT">  </span><span class="NAME">layout.offset</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="PUNC">(</span><span class="NAME">f</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
    82. 

  82. <span class='line'> 75</span> </span><span class="WHIT">      </span><span class="NAME">offset</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">f</span><span class="WHIT"> </span><span class="KEYW">instanceof</span><span class="WHIT"> </span><span class="NAME">Function</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">?</span><span class="WHIT"> </span><span class="NAME">f</span><span class="WHIT"> </span><span class="PUNC">:</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT"> </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">f</span><span class="PUNC">;</span><span class="WHIT"> </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
    83. 

  83. <span class='line'> 76</span> </span><span class="WHIT">      </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="KEYW">this</span><span class="PUNC">;</span><span class="WHIT">
    84. 

  84. <span class='line'> 77</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
    85. 

  85. <span class='line'> 78</span> 
    86. 

  86. <span class='line'> 79</span> </span><span class="WHIT">  </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">layout</span><span class="PUNC">;</span><span class="WHIT">
    87. 

  87. <span class='line'> 80</span> </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
    88. 

  88. <span class='line'> 81</span> </span></pre></body></html>
    89.