docs/source/Importer.html

   1 <html>\r
   2 <head>\r
   3   <title>The source code</title>\r
   4     <link href="../resources/prettify/prettify.css" type="text/css" rel="stylesheet" />\r
   5     <script type="text/javascript" src="../resources/prettify/prettify.js"></script>\r
   6 </head>\r
   7 <body  onload="prettyPrint();">\r
   8     <pre class="prettyprint lang-js">tx.Importer = function(){\r
   9         function chooseFile(callback){\r
  10                 var file = new air.File(air.File.documentsDirectory.nativePath);\r
  11                 var filter = new air.FileFilter("Tasks XML File", "*.xml");\r
  12                 \r
  13                 file.addEventListener('select', function(e){\r
  14                         doImport(e.target, callback);\r
  15                 });\r
  16                 \r
  17                 file.browseForOpen('Open', [filter]);\r
  18         }\r
  19         \r
  20         \r
  21         /*\r
  22          * This import function used to be clean and simple. The addition of asynchronous import and\r
  23          * a progress bar changed that quickly. :) \r
  24          */\r
  25         function doImport(file, callback){\r
  26                 \r
  27                 Ext.Msg.progress('Import', 'Reading file...');\r
  28                 \r
  29                 var listTable = tx.data.conn.getTable('list', 'listId');\r
  30                 var taskTable = tx.data.conn.getTable('task', 'taskId');\r
  31                 var taskCount = 0;\r
  32                 var visibleIndex = 0;\r
  33                 var doUpdate = true;\r
  34                 var f = String.format;\r
  35                 \r
  36                 function getProgress(index){\r
  37                         if(taskCount > 0){\r
  38                                 return (.8 * index) / taskCount;\r
  39                         }else{\r
  40                                 return .8;\r
  41                         }\r
  42                 }\r
  43                 \r
  44                 function readFile(){\r
  45                         var stream = new air.FileStream();\r
  46                         stream.open(file, air.FileMode.READ);\r
  47                         var xml = stream.readUTFBytes(stream.bytesAvailable);\r
  48                         stream.close();\r
  49                                         \r
  50                         Ext.Msg.updateProgress(.1, 'Parsing...');\r
  51                         parse.defer(10, null, [xml]);\r
  52                 }\r
  53                 \r
  54                 function parse(xml){\r
  55                         try {\r
  56                                 var doc = new runtime.flash.xml.XMLDocument();\r
  57                                 doc.ignoreWhite = true;\r
  58                                 doc.parseXML(xml);\r
  59                                 \r
  60                                 var lists = doc.firstChild.childNodes;\r
  61                                 var count = lists.length;\r
  62                                 \r
  63                                 for (var i = 0; i < count; i++) {\r
  64                                         taskCount += lists[i].childNodes.length;\r
  65                                 }       \r
  66                                 Ext.Msg.updateProgress(.15, '', 'Loading Tasks...');\r
  67                                 loadLists(lists, 0);\r
  68                         }catch(e){\r
  69                                 air.trace(e);\r
  70                                 alert('An error occured while trying to import the selected file.');\r
  71                         }                       \r
  72                 }\r
  73                 \r
  74                 function loadLists(lists, index){\r
  75                         if(index < lists.length){\r
  76                                 var list = lists[index];\r
  77                                 listTable.save(list.attributes);\r
  78                                 nextTask(list.childNodes, 0, lists, index);\r
  79                         }\r
  80                         else {\r
  81                                 Ext.Msg.updateProgress(1, '', 'Completing import...');\r
  82                                 callback.defer(10);\r
  83                         }                               \r
  84                 }               \r
  85                 \r
  86                 function nextTask(tasks, index, lists, listIndex){\r
  87                         if(index < tasks.length){\r
  88                                 Ext.Msg.updateProgress(\r
  89                                         getProgress(++visibleIndex),\r
  90                                         f('{0} of {1}', visibleIndex, taskCount)\r
  91                                 );\r
  92                                 loadTasks.defer(250, window, [tasks, index, lists, listIndex]);\r
  93                         }\r
  94                         else {\r
  95                                 loadLists(lists, ++listIndex);\r
  96                         }\r
  97                 }\r
  98                 \r
  99                 function loadTasks(tasks, index, lists, listIndex){\r
 100                         taskTable.save(tasks[index].attributes);\r
 101                         nextTask(tasks, ++index, lists, listIndex);\r
 102                 }\r
 103                 \r
 104                 readFile.defer(10);\r
 105         }\r
 106         \r
 107         this.doImport = function(callback){\r
 108                 chooseFile(callback);\r
 109         }\r
 110 };\r
 111 </pre>    \r
 112 </body>\r
 113 </html>