data/UpdateStore.js

   1 /* Extends the Ext.data.Store type
   2  * with  startUpdate() and stopUpdate() methods
   3  * to refresh the store data in the background
   4  * Components using this store directly will flicker
   5  * due to the redisplay of the element ater 'config.interval' ms
   6  *
   7  * Note that you have to call yourself startUpdate() for the background load
   8  * to begin
   9  */
  10 Ext.define('Proxmox.data.UpdateStore', {
  11     extend: 'Ext.data.Store',
  12     alias: 'store.update',
  13
  14     isStopped: true,
  15
  16     autoStart: false,
  17
  18     destroy: function() {
  19         var me = this;
  20         me.stopUpdate();
  21         me.callParent();
  22     },
  23
  24     constructor: function(config) {
  25         var me = this;
  26
  27         config = config || {};
  28
  29         if (!config.interval) {
  30             config.interval = 3000;
  31         }
  32
  33         if (!config.storeid) {
  34             throw "no storeid specified";
  35         }
  36
  37         var load_task = new Ext.util.DelayedTask();
  38
  39         var run_load_task = function() {
  40             if (me.isStopped) {
  41                 return;
  42             }
  43
  44             if (Proxmox.Utils.authOK()) {
  45                 var start = new Date();
  46                 me.load(function() {
  47                     var runtime = (new Date()) - start;
  48                     var interval = config.interval + runtime*2;
  49                     load_task.delay(interval, run_load_task);
  50                 });
  51             } else {
  52                 load_task.delay(200, run_load_task);
  53             }
  54         };
  55
  56         Ext.apply(config, {
  57             startUpdate: function() {
  58                 me.isStopped = false;
  59                 // run_load_task(); this makes problems with chrome
  60                 load_task.delay(1, run_load_task);
  61             },
  62             stopUpdate: function() {
  63                 me.isStopped = true;
  64                 load_task.cancel();
  65             }
  66         });
  67
  68         me.callParent([config]);
  69
  70         me.load_task = load_task;
  71
  72         if (me.autoStart) {
  73             me.startUpdate();
  74         }
  75     }
  76 });