extjs/build/examples/kitchensink/classic/samples/store/StockPrice.js

   1 Ext.define('KitchenSink.store.StockPrice', {
   2     extend: 'Ext.data.Store',
   3     model: 'KitchenSink.model.StockPrice',
   4     alias: 'store.stock-price',
   5
   6     data: [],
   7
   8     seed: 1.4,
   9
  10     generateData: function (count) {
  11         var me = this;
  12         function random() {
  13             // Controllable random.
  14             me.seed *= 42.7;
  15             me.seed -= Math.floor(me.seed);
  16             return me.seed * 2 - 1;
  17         }
  18
  19         var data = [], i, record = {
  20             time: new Date('Jan 1 2010').getTime(),
  21             close: 600
  22         };
  23         for (i = 0; i < (count || 1000); i++) {
  24             var ohlc = [random() * 25, random() * 25, random() * 25];
  25             record = {
  26                 time: record.time + 3600000,
  27                 open: record.close,
  28                 high: record.close + Math.max.apply(Math, ohlc),
  29                 low: record.close + Math.min.apply(Math, ohlc),
  30                 close: record.close + ohlc[1]
  31             };
  32             if (record.open < record.low) {
  33                 record.low = record.open;
  34             } else if (record.open > record.high) {
  35                 record.high = record.open;
  36             }
  37             data.push(record);
  38         }
  39         return data;
  40     },
  41
  42     refreshData: function () {
  43         this.setData(this.generateData(1000));
  44     },
  45
  46     constructor: function (config) {
  47         config = Ext.apply({
  48             data: this.generateData()
  49         }, config);
  50         this.callParent([config]);
  51     }
  52 });