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