EventBus.html
4.62 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>The source code</title>
<link href="../resources/prettify/prettify.css" type="text/css" rel="stylesheet" />
<script type="text/javascript" src="../resources/prettify/prettify.js"></script>
<style type="text/css">
.highlight { display: block; background-color: #ddd; }
</style>
<script type="text/javascript">
function highlight() {
document.getElementById(location.hash.replace(/#/, "")).className = "highlight";
}
</script>
</head>
<body onload="prettyPrint(); highlight();">
<pre class="prettyprint lang-js"><span id='Ext-app-EventBus'>/**
</span> * @class Ext.app.EventBus
* @private
*/
Ext.define('Ext.app.EventBus', {
requires: [
'Ext.util.Event',
'Ext.Component'
],
mixins: {
observable: 'Ext.util.Observable'
},
constructor: function() {
this.mixins.observable.constructor.call(this);
this.bus = {};
var me = this;
Ext.override(Ext.Component, {
fireEvent: function(ev) {
if (Ext.util.Observable.prototype.fireEvent.apply(this, arguments) !== false) {
return me.dispatch.call(me, ev, this, arguments);
}
return false;
}
});
},
dispatch: function(ev, target, args) {
var bus = this.bus,
selectors = bus[ev],
selector, controllers, id, events, event, i, ln;
if (selectors) {
// Loop over all the selectors that are bound to this event
for (selector in selectors) {
// Check if the target matches the selector
if (selectors.hasOwnProperty(selector) && target.is(selector)) {
// Loop over all the controllers that are bound to this selector
controllers = selectors[selector];
for (id in controllers) {
if (controllers.hasOwnProperty(id)) {
// Loop over all the events that are bound to this selector on this controller
events = controllers[id];
for (i = 0, ln = events.length; i < ln; i++) {
event = events[i];
// Fire the event!
if (event.fire.apply(event, Array.prototype.slice.call(args, 1)) === false) {
return false;
}
}
}
}
}
}
}
return true;
},
control: function(selectors, listeners, controller) {
var bus = this.bus,
hasListeners, tree, list,
selector, options, listener, scope, event, listenerList, ev;
if (Ext.isString(selectors)) {
selector = selectors;
selectors = {};
selectors[selector] = listeners;
this.control(selectors, null, controller);
return;
}
hasListeners = Ext.util.Observable.HasListeners.prototype;
for (selector in selectors) {
if (selectors.hasOwnProperty(selector)) {
listenerList = selectors[selector] || {};
for (ev in listenerList) {
if (listenerList.hasOwnProperty(ev)) {
options = {};
listener = listenerList[ev];
scope = controller;
event = new Ext.util.Event(controller, ev);
// Normalize the listener
if (Ext.isObject(listener)) {
options = listener;
listener = options.fn;
scope = options.scope || controller;
delete options.fn;
delete options.scope;
}
event.addListener(listener, scope, options);
hasListeners[ev] = 1;
// Create the bus tree if it is not there yet
tree = bus[ev] || (bus[ev] = {});
tree = tree[selector] || (tree[selector] = {});
list = tree[controller.id] || (tree[controller.id] = []);
// Push our listener in our bus
list.push(event);
}
} //end inner loop
}
} //end outer loop
}
});
</pre>
</body>
</html>