Question

For example, the following MXML script attaches a listener to a Button class:

<mx:Button id='STACK' label='OVERFLOW' click='doStuff()'/> 

I have a custom action script class which fires an event when a value is updated and I wish to be able to listen for that event in an MXML class:

ActionScript Class:

public function set currentPage(newCurrentPage: Number) : void {     _currentPage = newCurrentPage;      dispatchEvent(new DataEvent(PAGE_CHANGED, true, false, _currentPage)); } 

And I wish to be able to do the following in MXML:

<myClass:Class <...> pageChanged='doMoreStuff()' /> 

How would I do this? Cheers 🙂

Answer 1

You have to declare the event with a metadata tag:

<mx:Metadata> [Event(name='pageChanged', type='full.type.name.of.DataEvent')] </mx:Metadata> 

The name of the event must match the event name (PAGE_CHANGED constant in your example).

Edit: if you’re writing the class in ActionScript instead of MXML, you can apply the metadata tag directly to your class:

[Event(name='pageChanged', type='full.type.name.of.DataEvent')] public class MyClass extends WhateverItExtends