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/examples/MarkerManagerDemo/bin-release/srcview/source/com/google/maps/examples/MarkerManager.as.html

http://gmaps-utility-library-flash.googlecode.com/
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  6. <title>MarkerManager.as</title>

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  9. 

    10. 

  10. <body><pre><span class="ActionScriptComment">/* 
    11. 

  11.  * MarkerManager, v1.0
    12. 

  12.  * Copyright (c) 2007 Google Inc.
    13. 

  13.  * Author: Doug Ricket, others
    14. 

  14.  *  Ported to AS3 by Pamela Fox 
    15. 

  15.  *
    16. 

  16.  * Licensed under the Apache License, Version 2.0:
    17. 

  17.  *     http://www.apache.org/licenses/LICENSE-2.0
    18. 

  18.  *
    19. 

  19.  * Marker manager is an interface between the map and the user, designed
    20. 

  20.  * to manage adding and removing many points when the viewport changes.
    21. 

  21.  *
    22. 

  22.  * Algorithm: The MM places its markers onto a grid, similar to the map tiles.
    23. 

  23.  * When the user moves the viewport, the MM computes which grid cells have
    24. 

  24.  * entered or left the viewport, and shows or hides all the markers in those
    25. 

  25.  * cells.
    26. 

  26.  * (If the users scrolls the viewport beyond the markers that are loaded,
    27. 

  27.  * no markers will be visible until the EVENT_moveend triggers an update.)
    28. 

  28.  *
    29. 

  29.  * In practical consequences, this allows 10,000 markers to be distributed over
    30. 

  30.  * a large area, and as long as only 100-200 are visible in any given viewport,
    31. 

  31.  * the user will see good performance corresponding to the 100 visible markers,
    32. 

  32.  * rather than poor performance corresponding to the total 10,000 markers.
    33. 

  33.  *
    34. 

  34.  * Note that some code is optimized for speed over space,
    35. 

  35.  * with the goal of accommodating thousands of markers.
    36. 

  36.  *
    37. 

  37.  */</span>
    38. 

  38. <span class="ActionScriptpackage">package</span> <span class="ActionScriptDefault_Text">com</span>.<span class="ActionScriptDefault_Text">google</span>.<span class="ActionScriptDefault_Text">maps</span>.<span class="ActionScriptDefault_Text">examples</span> <span class="ActionScriptBracket/Brace">{</span>
    39. 

  39. <span class="ActionScriptReserved">import</span> <span class="ActionScriptDefault_Text">flash</span>.<span class="ActionScriptDefault_Text">events</span>.<span class="ActionScriptDefault_Text">Event</span>;
    40. 

  40. <span class="ActionScriptReserved">import</span> <span class="ActionScriptDefault_Text">flash</span>.<span class="ActionScriptDefault_Text">events</span>.<span class="ActionScriptDefault_Text">MouseEvent</span>;
    41. 

  41. <span class="ActionScriptReserved">import</span> <span class="ActionScriptDefault_Text">flash</span>.<span class="ActionScriptDefault_Text">geom</span>.<span class="ActionScriptDefault_Text">Point</span>;
    42. 

  42. <span class="ActionScriptReserved">import</span> <span class="ActionScriptDefault_Text">flash</span>.<span class="ActionScriptDefault_Text">display</span>.<span class="ActionScriptDefault_Text">DisplayObject</span>;
    43. 

  43. <span class="ActionScriptReserved">import</span> <span class="ActionScriptDefault_Text">flash</span>.<span class="ActionScriptDefault_Text">display</span>.<span class="ActionScriptDefault_Text">Sprite</span>;
    44. 

  44. <span class="ActionScriptReserved">import</span> <span class="ActionScriptDefault_Text">flash</span>.<span class="ActionScriptDefault_Text">display</span>.<span class="ActionScriptDefault_Text">Shape</span>;
    45. 

  45. <span class="ActionScriptReserved">import</span> <span class="ActionScriptDefault_Text">flash</span>.<span class="ActionScriptDefault_Text">text</span>.<span class="ActionScriptDefault_Text">TextField</span>;
    46. 

  46. <span class="ActionScriptReserved">import</span> <span class="ActionScriptDefault_Text">flash</span>.<span class="ActionScriptDefault_Text">text</span>.<span class="ActionScriptDefault_Text">TextFieldAutoSize</span>;
    47. 

  47. <span class="ActionScriptReserved">import</span> <span class="ActionScriptDefault_Text">flash</span>.<span class="ActionScriptDefault_Text">text</span>.<span class="ActionScriptDefault_Text">TextFormat</span>;
    48. 

  48. <span class="ActionScriptReserved">import</span> <span class="ActionScriptDefault_Text">com</span>.<span class="ActionScriptDefault_Text">google</span>.<span class="ActionScriptDefault_Text">maps</span>.<span class="ActionScriptDefault_Text">MapEvent</span>;
    49. 

  49. <span class="ActionScriptReserved">import</span> <span class="ActionScriptDefault_Text">com</span>.<span class="ActionScriptDefault_Text">google</span>.<span class="ActionScriptDefault_Text">maps</span>.<span class="ActionScriptDefault_Text">MapMoveEvent</span>;
    50. 

  50. <span class="ActionScriptReserved">import</span> <span class="ActionScriptDefault_Text">com</span>.<span class="ActionScriptDefault_Text">google</span>.<span class="ActionScriptDefault_Text">maps</span>.<span class="ActionScriptDefault_Text">Map</span>;
    51. 

  51. <span class="ActionScriptReserved">import</span> <span class="ActionScriptDefault_Text">com</span>.<span class="ActionScriptDefault_Text">google</span>.<span class="ActionScriptDefault_Text">maps</span>.<span class="ActionScriptDefault_Text">LatLng</span>;
    52. 

  52. <span class="ActionScriptReserved">import</span> <span class="ActionScriptDefault_Text">com</span>.<span class="ActionScriptDefault_Text">google</span>.<span class="ActionScriptDefault_Text">maps</span>.<span class="ActionScriptDefault_Text">LatLngBounds</span>;
    53. 

  53. <span class="ActionScriptReserved">import</span> <span class="ActionScriptDefault_Text">com</span>.<span class="ActionScriptDefault_Text">google</span>.<span class="ActionScriptDefault_Text">maps</span>.<span class="ActionScriptDefault_Text">examples</span>.<span class="ActionScriptDefault_Text">GridBounds</span>;
    54. 

  54. <span class="ActionScriptReserved">import</span> <span class="ActionScriptDefault_Text">com</span>.<span class="ActionScriptDefault_Text">google</span>.<span class="ActionScriptDefault_Text">maps</span>.<span class="ActionScriptDefault_Text">overlays</span>.<span class="ActionScriptDefault_Text">Marker</span>;
    55. 

  55. <span class="ActionScriptReserved">import</span> <span class="ActionScriptDefault_Text">com</span>.<span class="ActionScriptDefault_Text">google</span>.<span class="ActionScriptDefault_Text">maps</span>.<span class="ActionScriptDefault_Text">interfaces</span>.<span class="ActionScriptDefault_Text">IMap</span>;
    56. 

  56. <span class="ActionScriptReserved">import</span> <span class="ActionScriptDefault_Text">com</span>.<span class="ActionScriptDefault_Text">google</span>.<span class="ActionScriptDefault_Text">maps</span>.<span class="ActionScriptDefault_Text">interfaces</span>.<span class="ActionScriptDefault_Text">IProjection</span>;
    57. 

  57. 

  58. <span class="ActionScriptReserved">public</span> <span class="ActionScriptclass">class</span> <span class="ActionScriptDefault_Text">MarkerManager</span> <span class="ActionScriptBracket/Brace">{</span>
    59. 

  59.      
    60. 

  60. <span class="ActionScriptComment">// Static constants:
    61. 

  61. </span><span class="ActionScriptReserved">public</span> <span class="ActionScriptReserved">static</span> <span class="ActionScriptReserved">const</span> <span class="ActionScriptDefault_Text">DEFAULT_TILE_SIZE</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Number</span> <span class="ActionScriptOperator">=</span> 1024;
    62. 

  62. <span class="ActionScriptReserved">public</span> <span class="ActionScriptReserved">static</span> <span class="ActionScriptReserved">const</span> <span class="ActionScriptDefault_Text">DEFAULT_MAX_ZOOM</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Number</span> <span class="ActionScriptOperator">=</span> 17;
    63. 

  63. <span class="ActionScriptReserved">public</span> <span class="ActionScriptReserved">static</span> <span class="ActionScriptReserved">const</span> <span class="ActionScriptDefault_Text">DEFAULT_BORDER_PADDING</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Number</span> <span class="ActionScriptOperator">=</span> 100;
    64. 

  64. <span class="ActionScriptReserved">public</span> <span class="ActionScriptReserved">static</span> <span class="ActionScriptReserved">const</span> <span class="ActionScriptDefault_Text">MERCATOR_ZOOM_LEVEL_ZERO_RANGE</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Number</span> <span class="ActionScriptOperator">=</span> 256;
    65. 

  65. 

  66. <span class="ActionScriptReserved">private</span> <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">map_</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">IMap</span>;
    67. 

  67. <span class="ActionScriptReserved">private</span> <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">mapZoom_</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Number</span>;
    68. 

  68. <span class="ActionScriptReserved">private</span> <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">maxZoom_</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Number</span>;
    69. 

  69. <span class="ActionScriptReserved">private</span> <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">projection_</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">IProjection</span>;
    70. 

  70. <span class="ActionScriptReserved">private</span> <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">trackMarkers_</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Boolean</span>;
    71. 

  71. <span class="ActionScriptReserved">private</span> <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">swPadding_</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Point</span>;
    72. 

  72. <span class="ActionScriptReserved">private</span> <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">nePadding_</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Point</span>;
    73. 

  73. <span class="ActionScriptReserved">private</span> <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">borderPadding_</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Number</span>;
    74. 

  74. <span class="ActionScriptReserved">private</span> <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">gridWidth_</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Array</span>;
    75. 

  75. <span class="ActionScriptReserved">private</span> <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">grid_</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Array</span>;
    76. 

  76. <span class="ActionScriptReserved">private</span> <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">numMarkers_</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Array</span>;
    77. 

  77. <span class="ActionScriptReserved">private</span> <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">shownBounds_</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">GridBounds</span>;
    78. 

  78. <span class="ActionScriptReserved">private</span> <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">shownMarkers_</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Number</span>;
    79. 

  79. <span class="ActionScriptReserved">private</span> <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">tileSize_</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Number</span>;
    80. 

  80. 

  81. <span class="ActionScriptASDoc">/**
    82. 

  82.  * Creates a new MarkerManager that will show/hide markers on a map.
    83. 

  83.  *
    84. 

  84.  * @constructor
    85. 

  85.  * @param {Map} map The map to manage.
    86. 

  86.  * @param {Object} opt_opts A container for optional arguments:
    87. 

  87.  *   {Number} maxZoom The maximum zoom level for which to create tiles.
    88. 

  88.  *   {Number} borderPadding The width in pixels beyond the map border,
    89. 

  89.  *                   where markers should be display.
    90. 

  90.  *   {Boolean} trackMarkers Whether or not this manager should track marker
    91. 

  91.  *                   movements.
    92. 

  92.  */</span>
    93. 

  93. <span class="ActionScriptReserved">public</span> <span class="ActionScriptfunction">function</span> <span class="ActionScriptDefault_Text">MarkerManager</span><span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptDefault_Text">map</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">IMap</span>, <span class="ActionScriptDefault_Text">opt_opts</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Object</span><span class="ActionScriptBracket/Brace">)</span> <span class="ActionScriptBracket/Brace">{</span>
    94. 

  94.   <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">map_</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptDefault_Text">map</span>;
    95. 

  95.   <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">mapZoom_</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptDefault_Text">map</span>.<span class="ActionScriptDefault_Text">getZoom</span><span class="ActionScriptBracket/Brace">()</span>;
    96. 

  96.   <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">projection_</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptDefault_Text">map</span>.<span class="ActionScriptDefault_Text">getCurrentMapType</span><span class="ActionScriptBracket/Brace">()</span>.<span class="ActionScriptDefault_Text">getProjection</span><span class="ActionScriptBracket/Brace">()</span>;
    97. 

  97. 

  98.   <span class="ActionScriptDefault_Text">opt_opts</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptDefault_Text">opt_opts</span> <span class="ActionScriptOperator">||</span> <span class="ActionScriptBracket/Brace">{}</span>;
    99. 

  99.   <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">tileSize_</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptDefault_Text">DEFAULT_TILE_SIZE</span>;
    100. 

  100.   
    101. 

  101.   <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">maxZoom</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Number</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptDefault_Text">DEFAULT_MAX_ZOOM</span>;
    102. 

  102.   <span class="ActionScriptReserved">if</span><span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptDefault_Text">opt_opts</span>.<span class="ActionScriptDefault_Text">maxZoom</span> <span class="ActionScriptOperator">!=</span> <span class="ActionScriptReserved">undefined</span><span class="ActionScriptBracket/Brace">)</span> <span class="ActionScriptBracket/Brace">{</span>
    103. 

  103.     <span class="ActionScriptDefault_Text">maxZoom</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptDefault_Text">opt_opts</span>.<span class="ActionScriptDefault_Text">maxZoom</span>;
    104. 

  104.   <span class="ActionScriptBracket/Brace">}</span>
    105. 

  105.   <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">maxZoom_</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptDefault_Text">maxZoom</span>;
    106. 

  106. 

  107.   <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">trackMarkers_</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptDefault_Text">opt_opts</span>.<span class="ActionScriptDefault_Text">trackMarkers</span>;
    108. 

  108. 

  109.   <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">padding</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Number</span>;
    110. 

  110.   <span class="ActionScriptReserved">if</span> <span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptDefault_Text">opt_opts</span>.<span class="ActionScriptDefault_Text">borderPadding</span><span class="ActionScriptBracket/Brace">)</span> <span class="ActionScriptBracket/Brace">{</span>
    111. 

  111.     <span class="ActionScriptDefault_Text">padding</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptDefault_Text">opt_opts</span>.<span class="ActionScriptDefault_Text">borderPadding</span>;
    112. 

  112.   <span class="ActionScriptBracket/Brace">}</span> <span class="ActionScriptReserved">else</span> <span class="ActionScriptBracket/Brace">{</span>
    113. 

  113.     <span class="ActionScriptDefault_Text">padding</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptDefault_Text">DEFAULT_BORDER_PADDING</span>;
    114. 

  114.   <span class="ActionScriptBracket/Brace">}</span>
    115. 

  115.   <span class="ActionScriptComment">// The padding in pixels beyond the viewport, where we will pre-load markers.
    116. 

  116. </span>  <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">swPadding_</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptReserved">new</span> <span class="ActionScriptDefault_Text">Point</span><span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptOperator">-</span><span class="ActionScriptDefault_Text">padding</span>, <span class="ActionScriptDefault_Text">padding</span><span class="ActionScriptBracket/Brace">)</span>;
    117. 

  117.   <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">nePadding_</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptReserved">new</span> <span class="ActionScriptDefault_Text">Point</span><span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptDefault_Text">padding</span>, <span class="ActionScriptOperator">-</span><span class="ActionScriptDefault_Text">padding</span><span class="ActionScriptBracket/Brace">)</span>;
    118. 

  118.   <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">borderPadding_</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptDefault_Text">padding</span>;
    119. 

  119. 

  120.   <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">gridWidth_</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptReserved">new</span> <span class="ActionScriptDefault_Text">Array</span><span class="ActionScriptBracket/Brace">()</span>;
    121. 

  121. 

  122.   <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">grid_</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptReserved">new</span> <span class="ActionScriptDefault_Text">Array</span><span class="ActionScriptBracket/Brace">()</span>;
    123. 

  123.   <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">grid_</span><span class="ActionScriptBracket/Brace">[</span><span class="ActionScriptDefault_Text">maxZoom</span><span class="ActionScriptBracket/Brace">]</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptReserved">new</span> <span class="ActionScriptDefault_Text">Array</span><span class="ActionScriptBracket/Brace">()</span>;
    124. 

  124.   <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">numMarkers_</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptReserved">new</span> <span class="ActionScriptDefault_Text">Array</span><span class="ActionScriptBracket/Brace">()</span>;
    125. 

  125.   <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">numMarkers_</span><span class="ActionScriptBracket/Brace">[</span><span class="ActionScriptDefault_Text">maxZoom</span><span class="ActionScriptBracket/Brace">]</span> <span class="ActionScriptOperator">=</span> 0;
    126. 

  126. 

  127.   <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">map_</span>.<span class="ActionScriptDefault_Text">addEventListener</span><span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptDefault_Text">MapMoveEvent</span>.<span class="ActionScriptDefault_Text">MOVE_END</span>, <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">onMapMoveEnd_</span><span class="ActionScriptBracket/Brace">)</span>;
    128. 

  128. 

  129.   <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">resetManager_</span><span class="ActionScriptBracket/Brace">()</span>;
    130. 

  130.   <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">shownMarkers_</span> <span class="ActionScriptOperator">=</span> 0;
    131. 

  131. 

  132.   <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">shownBounds_</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">getMapGridBounds_</span><span class="ActionScriptBracket/Brace">()</span>;
    133. 

  133. <span class="ActionScriptBracket/Brace">}</span>;
    134. 

  134. 

  135. 

  136. <span class="ActionScriptComment">// NOTE: These two closures provide easy access to the map.
    137. 

  137. </span><span class="ActionScriptComment">// They are used as callbacks, not as methods.
    138. 

  138. </span><span class="ActionScriptReserved">private</span> <span class="ActionScriptfunction">function</span> <span class="ActionScriptDefault_Text">removeOverlay_</span><span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptDefault_Text">marker</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Marker</span><span class="ActionScriptBracket/Brace">)</span><span class="ActionScriptOperator">:</span><span class="ActionScriptReserved">void</span> <span class="ActionScriptBracket/Brace">{</span>
    139. 

  139.   <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">map_</span>.<span class="ActionScriptDefault_Text">removeOverlay</span><span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptDefault_Text">marker</span><span class="ActionScriptBracket/Brace">)</span>;
    140. 

  140.   <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">shownMarkers_</span><span class="ActionScriptOperator">--</span>;
    141. 

  141. <span class="ActionScriptBracket/Brace">}</span>
    142. 

  142. 

  143. <span class="ActionScriptReserved">private</span> <span class="ActionScriptfunction">function</span> <span class="ActionScriptDefault_Text">addOverlay_</span><span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptDefault_Text">marker</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Marker</span><span class="ActionScriptBracket/Brace">)</span><span class="ActionScriptOperator">:</span><span class="ActionScriptReserved">void</span> <span class="ActionScriptBracket/Brace">{</span>
    144. 

  144.   <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">map_</span>.<span class="ActionScriptDefault_Text">addOverlay</span><span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptDefault_Text">marker</span><span class="ActionScriptBracket/Brace">)</span>;
    145. 

  145.   <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">shownMarkers_</span><span class="ActionScriptOperator">++</span>;
    146. 

  146. <span class="ActionScriptBracket/Brace">}</span>
    147. 

  147. 

  148. <span class="ActionScriptASDoc">/**
    149. 

  149.  * Initializes MarkerManager arrays for all zoom levels
    150. 

  150.  * Called by constructor and by clearAllMarkers
    151. 

  151.  */</span> 
    152. 

  152. <span class="ActionScriptReserved">private</span> <span class="ActionScriptfunction">function</span> <span class="ActionScriptDefault_Text">resetManager_</span><span class="ActionScriptBracket/Brace">()</span><span class="ActionScriptOperator">:</span><span class="ActionScriptReserved">void</span> <span class="ActionScriptBracket/Brace">{</span>
    153. 

  153.   <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">mapWidth</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Number</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptDefault_Text">MERCATOR_ZOOM_LEVEL_ZERO_RANGE</span>;
    154. 

  154.   <span class="ActionScriptReserved">for</span> <span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">zoom</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Number</span> <span class="ActionScriptOperator">=</span> 0; <span class="ActionScriptDefault_Text">zoom</span> <span class="ActionScriptOperator">&lt;=</span> <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">maxZoom_</span>; <span class="ActionScriptOperator">++</span><span class="ActionScriptDefault_Text">zoom</span><span class="ActionScriptBracket/Brace">)</span> <span class="ActionScriptBracket/Brace">{</span>
    155. 

  155.     <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">grid_</span><span class="ActionScriptBracket/Brace">[</span><span class="ActionScriptDefault_Text">zoom</span><span class="ActionScriptBracket/Brace">]</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptReserved">new</span> <span class="ActionScriptDefault_Text">Array</span><span class="ActionScriptBracket/Brace">()</span>;
    156. 

  156.     <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">numMarkers_</span><span class="ActionScriptBracket/Brace">[</span><span class="ActionScriptDefault_Text">zoom</span><span class="ActionScriptBracket/Brace">]</span> <span class="ActionScriptOperator">=</span> 0;
    157. 

  157.     <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">gridWidth_</span><span class="ActionScriptBracket/Brace">[</span><span class="ActionScriptDefault_Text">zoom</span><span class="ActionScriptBracket/Brace">]</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptDefault_Text">Math</span>.<span class="ActionScriptDefault_Text">ceil</span><span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptDefault_Text">mapWidth</span><span class="ActionScriptOperator">/</span><span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">tileSize_</span><span class="ActionScriptBracket/Brace">)</span>;
    158. 

  158.     <span class="ActionScriptDefault_Text">mapWidth</span> <span class="ActionScriptOperator">&lt;&lt;=</span> 1;
    159. 

  159.   <span class="ActionScriptBracket/Brace">}</span>
    160. 

  160. <span class="ActionScriptBracket/Brace">}</span>
    161. 

  161. 

  162. <span class="ActionScriptASDoc">/**
    163. 

  163.  * Removes all currently displayed markers
    164. 

  164.  * and calls resetManager to clear arrays
    165. 

  165.  */</span>
    166. 

  166. <span class="ActionScriptReserved">public</span> <span class="ActionScriptfunction">function</span> <span class="ActionScriptDefault_Text">clearMarkers</span><span class="ActionScriptBracket/Brace">()</span><span class="ActionScriptOperator">:</span><span class="ActionScriptReserved">void</span> <span class="ActionScriptBracket/Brace">{</span>
    167. 

  167.   <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">processAll_</span><span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">shownBounds_</span>, <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">removeOverlay_</span><span class="ActionScriptBracket/Brace">)</span>;
    168. 

  168.   <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">resetManager_</span><span class="ActionScriptBracket/Brace">()</span>;
    169. 

  169. <span class="ActionScriptBracket/Brace">}</span>
    170. 

  170. 

  171. 

  172. <span class="ActionScriptASDoc">/**
    173. 

  173.  * Gets the tile coordinate for a given latlng point.
    174. 

  174.  *
    175. 

  175.  * @param {LatLng} latlng The geographical point.
    176. 

  176.  * @param {Number} zoom The zoom level.
    177. 

  177.  * @param {GSize} padding The padding used to shift the pixel coordinate.
    178. 

  178.  *               Used for expanding a bounds to include an extra padding
    179. 

  179.  *               of pixels surrounding the bounds.
    180. 

  180.  * @return {GPoint} The point in tile coordinates.
    181. 

  181.  *
    182. 

  182.  */</span>
    183. 

  183. <span class="ActionScriptReserved">private</span> <span class="ActionScriptfunction">function</span> <span class="ActionScriptDefault_Text">getTilePoint_</span><span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptDefault_Text">latlng</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">LatLng</span>, <span class="ActionScriptDefault_Text">zoom</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Number</span>, <span class="ActionScriptDefault_Text">padding</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Point</span><span class="ActionScriptBracket/Brace">)</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Point</span> <span class="ActionScriptBracket/Brace">{</span>
    184. 

  184.   <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">pixelPoint</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Point</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">projection_</span>.<span class="ActionScriptDefault_Text">fromLatLngToPixel</span><span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptDefault_Text">latlng</span>, <span class="ActionScriptDefault_Text">zoom</span><span class="ActionScriptBracket/Brace">)</span>;
    185. 

  185.   <span class="ActionScriptReserved">return</span> <span class="ActionScriptReserved">new</span> <span class="ActionScriptDefault_Text">Point</span><span class="ActionScriptBracket/Brace">(</span>
    186. 

  186.       <span class="ActionScriptDefault_Text">Math</span>.<span class="ActionScriptDefault_Text">floor</span><span class="ActionScriptBracket/Brace">((</span><span class="ActionScriptDefault_Text">pixelPoint</span>.<span class="ActionScriptDefault_Text">x</span> <span class="ActionScriptOperator">+</span> <span class="ActionScriptDefault_Text">padding</span>.<span class="ActionScriptDefault_Text">x</span><span class="ActionScriptBracket/Brace">)</span> <span class="ActionScriptOperator">/</span> <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">tileSize_</span><span class="ActionScriptBracket/Brace">)</span>,
    187. 

  187.       <span class="ActionScriptDefault_Text">Math</span>.<span class="ActionScriptDefault_Text">floor</span><span class="ActionScriptBracket/Brace">((</span><span class="ActionScriptDefault_Text">pixelPoint</span>.<span class="ActionScriptDefault_Text">y</span> <span class="ActionScriptOperator">+</span> <span class="ActionScriptDefault_Text">padding</span>.<span class="ActionScriptDefault_Text">y</span><span class="ActionScriptBracket/Brace">)</span> <span class="ActionScriptOperator">/</span> <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">tileSize_</span><span class="ActionScriptBracket/Brace">))</span>;
    188. 

  188. <span class="ActionScriptBracket/Brace">}</span>;
    189. 

  189. 

  190. 

  191. <span class="ActionScriptASDoc">/**
    192. 

  192.  * Finds the appropriate place to add the marker to the grid.
    193. 

  193.  * Optimized for speed; does not actually add the marker to the map.
    194. 

  194.  * Designed for batch-processing thousands of markers.
    195. 

  195.  *
    196. 

  196.  * @param {Marker} marker The marker to add.
    197. 

  197.  * @param {Number} minZoom The minimum zoom for displaying the marker.
    198. 

  198.  * @param {Number} maxZoom The maximum zoom for displaying the marker.
    199. 

  199.  */</span>
    200. 

  200. <span class="ActionScriptReserved">private</span> <span class="ActionScriptfunction">function</span> <span class="ActionScriptDefault_Text">addMarkerBatch_</span><span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptDefault_Text">marker</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Marker</span>, <span class="ActionScriptDefault_Text">minZoom</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Number</span>, <span class="ActionScriptDefault_Text">maxZoom</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Number</span><span class="ActionScriptBracket/Brace">)</span><span class="ActionScriptOperator">:</span><span class="ActionScriptReserved">void</span> <span class="ActionScriptBracket/Brace">{</span>
    201. 

  201.   <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">mPoint</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">LatLng</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptDefault_Text">marker</span>.<span class="ActionScriptDefault_Text">getLatLng</span><span class="ActionScriptBracket/Brace">()</span>;
    202. 

  202.   <span class="ActionScriptComment">// Tracking markers is expensive, so we do this only if the
    203. 

  203. </span>  <span class="ActionScriptComment">// user explicitly requested it when creating marker manager.
    204. 

  204. </span>  <span class="ActionScriptReserved">if</span> <span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">trackMarkers_</span><span class="ActionScriptBracket/Brace">)</span> <span class="ActionScriptBracket/Brace">{</span>
    205. 

  205.     <span class="ActionScriptDefault_Text">marker</span>.<span class="ActionScriptDefault_Text">addEventListener</span><span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptString">&quot;changed&quot;</span>, <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">onMarkerMoved_</span><span class="ActionScriptBracket/Brace">)</span>;
    206. 

  206.   <span class="ActionScriptBracket/Brace">}</span>
    207. 

  207. 

  208.   <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">gridPoint</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Point</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">getTilePoint_</span><span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptDefault_Text">mPoint</span>, <span class="ActionScriptDefault_Text">maxZoom</span>, <span class="ActionScriptReserved">new</span> <span class="ActionScriptDefault_Text">Point</span><span class="ActionScriptBracket/Brace">(</span>0, 0<span class="ActionScriptBracket/Brace">))</span>;
    209. 

  209. 

  210.   <span class="ActionScriptReserved">for</span> <span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">zoom</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Number</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptDefault_Text">maxZoom</span>; <span class="ActionScriptDefault_Text">zoom</span> <span class="ActionScriptOperator">&gt;=</span> <span class="ActionScriptDefault_Text">minZoom</span>; <span class="ActionScriptDefault_Text">zoom</span><span class="ActionScriptOperator">--</span><span class="ActionScriptBracket/Brace">)</span> <span class="ActionScriptBracket/Brace">{</span>
    211. 

  211.     <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">cell</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Array</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">getGridCellCreate_</span><span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptDefault_Text">gridPoint</span>.<span class="ActionScriptDefault_Text">x</span>, <span class="ActionScriptDefault_Text">gridPoint</span>.<span class="ActionScriptDefault_Text">y</span>, <span class="ActionScriptDefault_Text">zoom</span><span class="ActionScriptBracket/Brace">)</span>;
    212. 

  212.     <span class="ActionScriptDefault_Text">cell</span>.<span class="ActionScriptDefault_Text">push</span><span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptDefault_Text">marker</span><span class="ActionScriptBracket/Brace">)</span>;
    213. 

  213. 

  214.     <span class="ActionScriptDefault_Text">gridPoint</span>.<span class="ActionScriptDefault_Text">x</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptDefault_Text">gridPoint</span>.<span class="ActionScriptDefault_Text">x</span> <span class="ActionScriptOperator">&gt;&gt;</span> 1;
    215. 

  215.     <span class="ActionScriptDefault_Text">gridPoint</span>.<span class="ActionScriptDefault_Text">y</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptDefault_Text">gridPoint</span>.<span class="ActionScriptDefault_Text">y</span> <span class="ActionScriptOperator">&gt;&gt;</span> 1;
    216. 

  216.   <span class="ActionScriptBracket/Brace">}</span>
    217. 

  217. <span class="ActionScriptBracket/Brace">}</span>;
    218. 

  218. 

  219. 

  220. <span class="ActionScriptASDoc">/**
    221. 

  221.  * Returns whether or not the given point is visible in the shown bounds. This
    222. 

  222.  * is a helper method that takes care of the corner case, when shownBounds have
    223. 

  223.  * negative minX value.
    224. 

  224.  *
    225. 

  225.  * @param {Point} point a point on a grid.
    226. 

  226.  * @return {Boolean} Whether or not the given point is visible in the currently
    227. 

  227.  * shown bounds.
    228. 

  228.  */</span>
    229. 

  229. <span class="ActionScriptReserved">private</span> <span class="ActionScriptfunction">function</span> <span class="ActionScriptDefault_Text">isGridPointVisible_</span><span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptDefault_Text">point</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Point</span><span class="ActionScriptBracket/Brace">)</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Boolean</span> <span class="ActionScriptBracket/Brace">{</span>
    230. 

  230.   <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">vertical</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Boolean</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">shownBounds_</span>.<span class="ActionScriptDefault_Text">minY</span> <span class="ActionScriptOperator">&lt;=</span> <span class="ActionScriptDefault_Text">point</span>.<span class="ActionScriptDefault_Text">y</span> <span class="ActionScriptOperator">&amp;&amp;</span>
    231. 

  231.       <span class="ActionScriptDefault_Text">point</span>.<span class="ActionScriptDefault_Text">y</span> <span class="ActionScriptOperator">&lt;=</span> <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">shownBounds_</span>.<span class="ActionScriptDefault_Text">maxY</span>;
    232. 

  232.   <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">minX</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Number</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">shownBounds_</span>.<span class="ActionScriptDefault_Text">minX</span>;
    233. 

  233.   <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">horizontal</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Boolean</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptDefault_Text">minX</span> <span class="ActionScriptOperator">&lt;=</span> <span class="ActionScriptDefault_Text">point</span>.<span class="ActionScriptDefault_Text">x</span> <span class="ActionScriptOperator">&amp;&amp;</span> <span class="ActionScriptDefault_Text">point</span>.<span class="ActionScriptDefault_Text">x</span> <span class="ActionScriptOperator">&lt;=</span> <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">shownBounds_</span>.<span class="ActionScriptDefault_Text">maxX</span>;
    234. 

  234.   <span class="ActionScriptReserved">if</span> <span class="ActionScriptBracket/Brace">(!</span><span class="ActionScriptDefault_Text">horizontal</span> <span class="ActionScriptOperator">&amp;&amp;</span> <span class="ActionScriptDefault_Text">minX</span> <span class="ActionScriptOperator">&lt;</span> 0<span class="ActionScriptBracket/Brace">)</span> <span class="ActionScriptBracket/Brace">{</span>
    235. 

  235.     <span class="ActionScriptComment">// Shifts the negative part of the rectangle. As point.x is always less
    236. 

  236. </span>    <span class="ActionScriptComment">// than grid width, only test shifted minX .. 0 part of the shown bounds.
    237. 

  237. </span>    <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">width</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Number</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">gridWidth_</span><span class="ActionScriptBracket/Brace">[</span><span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">shownBounds_</span>.<span class="ActionScriptDefault_Text">z</span><span class="ActionScriptBracket/Brace">]</span>;
    238. 

  238.     <span class="ActionScriptDefault_Text">horizontal</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptDefault_Text">minX</span> <span class="ActionScriptOperator">+</span> <span class="ActionScriptDefault_Text">width</span> <span class="ActionScriptOperator">&lt;=</span> <span class="ActionScriptDefault_Text">point</span>.<span class="ActionScriptDefault_Text">x</span> <span class="ActionScriptOperator">&amp;&amp;</span> <span class="ActionScriptDefault_Text">point</span>.<span class="ActionScriptDefault_Text">x</span> <span class="ActionScriptOperator">&lt;=</span> <span class="ActionScriptDefault_Text">width</span> <span class="ActionScriptOperator">-</span> 1;
    239. 

  239.   <span class="ActionScriptBracket/Brace">}</span>
    240. 

  240.   <span class="ActionScriptReserved">return</span> <span class="ActionScriptDefault_Text">vertical</span> <span class="ActionScriptOperator">&amp;&amp;</span> <span class="ActionScriptDefault_Text">horizontal</span>;
    241. 

  241. <span class="ActionScriptBracket/Brace">}</span>
    242. 

  242. 

  243. 

  244. <span class="ActionScriptASDoc">/**
    245. 

  245.  * Reacts to a notification from a marker that it has moved to a new location.
    246. 

  246.  * It scans the grid all all zoom levels and moves the marker from the old grid
    247. 

  247.  * location to a new grid location.
    248. 

  248.  *
    249. 

  249.  * @param {Marker} marker The marker that moved.
    250. 

  250.  * @param {LatLng} oldLatLng The old position of the marker.
    251. 

  251.  * @param {LatLng} newLatLng The new position of the marker.
    252. 

  252.  */</span>
    253. 

  253. <span class="ActionScriptReserved">private</span> <span class="ActionScriptfunction">function</span> <span class="ActionScriptDefault_Text">onMarkerMoved_</span><span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptDefault_Text">marker</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Marker</span>, <span class="ActionScriptDefault_Text">oldLatLng</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">LatLng</span>, <span class="ActionScriptDefault_Text">newLatLng</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">LatLng</span><span class="ActionScriptBracket/Brace">)</span><span class="ActionScriptOperator">:</span><span class="ActionScriptReserved">void</span> <span class="ActionScriptBracket/Brace">{</span>
    254. 

  254.   <span class="ActionScriptComment">// NOTE: We do not know the minimum or maximum zoom the marker was
    255. 

  255. </span>  <span class="ActionScriptComment">// added at, so we start at the absolute maximum. Whenever we successfully
    256. 

  256. </span>  <span class="ActionScriptComment">// remove a marker at a given zoom, we add it at the new grid coordinates.
    257. 

  257. </span>  <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">zoom</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Number</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">maxZoom_</span>;
    258. 

  258.   <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">changed</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Boolean</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptReserved">false</span>;
    259. 

  259.   <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">oldGrid</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Point</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">getTilePoint_</span><span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptDefault_Text">oldLatLng</span>, <span class="ActionScriptDefault_Text">zoom</span>, <span class="ActionScriptReserved">new</span> <span class="ActionScriptDefault_Text">Point</span><span class="ActionScriptBracket/Brace">(</span>0, 0<span class="ActionScriptBracket/Brace">))</span>;
    260. 

  260.   <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">newGrid</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Point</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">getTilePoint_</span><span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptDefault_Text">newLatLng</span>, <span class="ActionScriptDefault_Text">zoom</span>, <span class="ActionScriptReserved">new</span> <span class="ActionScriptDefault_Text">Point</span><span class="ActionScriptBracket/Brace">(</span>0, 0<span class="ActionScriptBracket/Brace">))</span>;
    261. 

  261.   <span class="ActionScriptReserved">while</span> <span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptDefault_Text">zoom</span> <span class="ActionScriptOperator">&gt;=</span> 0 <span class="ActionScriptOperator">&amp;&amp;</span> <span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptDefault_Text">oldGrid</span>.<span class="ActionScriptDefault_Text">x</span> <span class="ActionScriptOperator">!=</span> <span class="ActionScriptDefault_Text">newGrid</span>.<span class="ActionScriptDefault_Text">x</span> <span class="ActionScriptOperator">||</span> <span class="ActionScriptDefault_Text">oldGrid</span>.<span class="ActionScriptDefault_Text">y</span> <span class="ActionScriptOperator">!=</span> <span class="ActionScriptDefault_Text">newGrid</span>.<span class="ActionScriptDefault_Text">y</span><span class="ActionScriptBracket/Brace">))</span> <span class="ActionScriptBracket/Brace">{</span>
    262. 

  262.     <span class="ActionScriptvar">var</span> <span class="ActionScriptDefault_Text">cell</span><span class="ActionScriptOperator">:</span><span class="ActionScriptDefault_Text">Array</span> <span class="ActionScriptOperator">=</span> <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">getGridCellNoCreate_</span><span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptDefault_Text">oldGrid</span>.<span class="ActionScriptDefault_Text">x</span>, <span class="ActionScriptDefault_Text">oldGrid</span>.<span class="ActionScriptDefault_Text">y</span>, <span class="ActionScriptDefault_Text">zoom</span><span class="ActionScriptBracket/Brace">)</span>;
    263. 

  263.     <span class="ActionScriptReserved">if</span> <span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptDefault_Text">cell</span><span class="ActionScriptBracket/Brace">)</span> <span class="ActionScriptBracket/Brace">{</span>
    264. 

  264.       <span class="ActionScriptReserved">if</span> <span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">removeFromArray</span><span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptDefault_Text">cell</span>, <span class="ActionScriptDefault_Text">marker</span><span class="ActionScriptBracket/Brace">))</span> <span class="ActionScriptBracket/Brace">{</span>
    265. 

  265.         <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">getGridCellCreate_</span><span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptDefault_Text">newGrid</span>.<span class="ActionScriptDefault_Text">x</span>, <span class="ActionScriptDefault_Text">newGrid</span>.<span class="ActionScriptDefault_Text">y</span>, <span class="ActionScriptDefault_Text">zoom</span><span class="ActionScriptBracket/Brace">)</span>.<span class="ActionScriptDefault_Text">push</span><span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptDefault_Text">marker</span><span class="ActionScriptBracket/Brace">)</span>;
    266. 

  266.       <span class="ActionScriptBracket/Brace">}</span>
    267. 

  267.     <span class="ActionScriptBracket/Brace">}</span>
    268. 

  268.     <span class="ActionScriptComment">// For the current zoom we also need to update the map. Markers that no
    269. 

  269. </span>    <span class="ActionScriptComment">// longer are visible are removed from the map. Markers that moved into
    270. 

  270. </span>    <span class="ActionScriptComment">// the shown bounds are added to the map. This also lets us keep the count
    271. 

  271. </span>    <span class="ActionScriptComment">// of visible markers up to date.
    272. 

  272. </span>    <span class="ActionScriptReserved">if</span> <span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptDefault_Text">zoom</span> <span class="ActionScriptOperator">==</span> <span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">mapZoom_</span><span class="ActionScriptBracket/Brace">)</span> <span class="ActionScriptBracket/Brace">{</span>
    273. 

  273.       <span class="ActionScriptReserved">if</span> <span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">isGridPointVisible_</span><span class="ActionScriptBracket/Brace">(</span><span class="ActionScriptDefault_Text">oldGrid</span><span class="ActionScriptBracket/Brace">))</span> <span class="ActionScriptBracket/Brace">{</span>
    274. 

  274.         <span class="ActionScriptReserved">if</span> <span class="ActionScriptBracket/Brace">(!</span><span class="ActionScriptReserved">this</span>.<span class="ActionScriptDefault_Text">isGridPointVisible_</span><span class="ActionScriptBrack…
    275.

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