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Patch: 3.3.0 AsyncQueue event bubbling (gallery-patch-330-async-queue-bubble) on cdn

Last Updated: 02/9/11

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Luke Smith

YUI Contributor

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Created: 01/26/11
Last CDN Push: 01/26/11
Build Tag: gallery-2011.01.26-20-33
Project: YUI 3
License: YUI BSD
YUI Version: 3.3.0
Free for use.

This patch adds a missing event prefix to the AsyncQueue events, allowing them to be subscribed to from a bubble target.

See the example snippet below for the case where the behavior fails without this patch.

This patch module is only necessary for version 3.3.0.

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Apply the patch in the use() statement as long as version 3.3.0 is in use. Remove from the use() statement after upgrading to the subsequent version.

Code Sample

<script src="http://yui.yahooapis.com/3.3.0/build/yui/yui-min.js"></script>

YUI({
    //Last Gallery Build of this module
    gallery: 'gallery-2011.01.26-20-33'
}).use('async-queue', 'gallery-patch-330-async-queue-bubble', function(Y) {
 
    // The bug would be triggered by any EventTarget extension that is configured with a prefix
    // This is commonly seen as the NAME static property of Y.Base subclasses, such as Plugin or Widget.
    // In the below case, 'myclass'
    Y.MyClass = Y.Base.create('myclass', Y.Base, [], { /* prototype */ }, { /* static properties */ });
 
    var instance = new Y.MyClass(),
        queue = new Y.AsyncQueue();
 
    // Make events from queue bubble to instance
    queue.addTarget(instance);
 
    // Has worked, and continues to work
    queue.on("execute", function (e) {
        console.log("Callback executed (logged from AsyncQueue subscription)");
    });
 
    // This doesn't work in 3.3.0 without this patch.  There was no namespace to identify the event origin
    // so the bubble target's prefix would be assumed, but that is a different event. This patch adds the
    // prefix 'queue'
    instance.on("queue:execute", function (e) {
        console.log("Executing a callback from queue (logged from MyClass subscription)");
    });
 
});

YUI({
    //Last Gallery Build of this module
    gallery: 'gallery-2011.01.26-20-33'
}).use('async-queue', 'gallery-patch-330-async-queue-bubble', function(Y) {

// The bug would be triggered by any EventTarget extension that is configured with a prefix
    // This is commonly seen as the NAME static property of Y.Base subclasses, such as Plugin or Widget.
    // In the below case, 'myclass'
    Y.MyClass = Y.Base.create('myclass', Y.Base, [], { /* prototype */ }, { /* static properties */ });

var instance = new Y.MyClass(),
        queue = new Y.AsyncQueue();

// Make events from queue bubble to instance
    queue.addTarget(instance);

// Has worked, and continues to work
    queue.on("execute", function (e) {
        console.log("Callback executed (logged from AsyncQueue subscription)");
    });

// This doesn't work in 3.3.0 without this patch.  There was no namespace to identify the event origin
    // so the bubble target's prefix would be assumed, but that is a different event. This patch adds the
    // prefix 'queue'
    instance.on("queue:execute", function (e) {
        console.log("Executing a callback from queue (logged from MyClass subscription)");
    });

});