docs/source/EventBus.html

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  18   <pre class="prettyprint lang-js"><span id='Ext-app-EventBus'>/**
  19 </span> * @class Ext.app.EventBus
  20  * @private
  21  *
  22  * Class documentation for the MVC classes will be present before 4.0 final, in the mean time please refer to the MVC
  23  * guide
  24  */
  25 Ext.define('Ext.app.EventBus', {
  26     requires: [
  27         'Ext.util.Event'
  28     ],
  29     mixins: {
  30         observable: 'Ext.util.Observable'
  31     },
  32
  33     constructor: function() {
  34         this.mixins.observable.constructor.call(this);
  35
  36         this.bus = {};
  37
  38         var me = this;
  39         Ext.override(Ext.Component, {
  40             fireEvent: function(ev) {
  41                 if (Ext.util.Observable.prototype.fireEvent.apply(this, arguments) !== false) {
  42                     return me.dispatch.call(me, ev, this, arguments);
  43                 }
  44                 return false;
  45             }
  46         });
  47     },
  48
  49     dispatch: function(ev, target, args) {
  50         var bus = this.bus,
  51             selectors = bus[ev],
  52             selector, controllers, id, events, event, i, ln;
  53
  54         if (selectors) {
  55             // Loop over all the selectors that are bound to this event
  56             for (selector in selectors) {
  57                 // Check if the target matches the selector
  58                 if (target.is(selector)) {
  59                     // Loop over all the controllers that are bound to this selector
  60                     controllers = selectors[selector];
  61                     for (id in controllers) {
  62                         // Loop over all the events that are bound to this selector on this controller
  63                         events = controllers[id];
  64                         for (i = 0, ln = events.length; i &lt; ln; i++) {
  65                             event = events[i];
  66                             // Fire the event!
  67                             return event.fire.apply(event, Array.prototype.slice.call(args, 1));
  68                         }
  69                     }
  70                 }
  71             }
  72         }
  73     },
  74
  75     control: function(selectors, listeners, controller) {
  76         var bus = this.bus,
  77             selector, fn;
  78
  79         if (Ext.isString(selectors)) {
  80             selector = selectors;
  81             selectors = {};
  82             selectors[selector] = listeners;
  83             this.control(selectors, null, controller);
  84             return;
  85         }
  86
  87         Ext.Object.each(selectors, function(selector, listeners) {
  88             Ext.Object.each(listeners, function(ev, listener) {
  89                 var options = {},
  90                     scope = controller,
  91                     event = Ext.create('Ext.util.Event', controller, ev);
  92
  93                 // Normalize the listener
  94                 if (Ext.isObject(listener)) {
  95                     options = listener;
  96                     listener = options.fn;
  97                     scope = options.scope || controller;
  98                     delete options.fn;
  99                     delete options.scope;
 100                 }
 101
 102                 event.addListener(listener, scope, options);
 103
 104                 // Create the bus tree if it is not there yet
 105                 bus[ev] = bus[ev] || {};
 106                 bus[ev][selector] = bus[ev][selector] || {};
 107                 bus[ev][selector][controller.id] = bus[ev][selector][controller.id] || [];
 108
 109                 // Push our listener in our bus
 110                 bus[ev][selector][controller.id].push(event);
 111             });
 112         });
 113     }
 114 });</pre>
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