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From: Jerry Stuckle <jstucklex@attglobal.net>
Newsgroups: comp.lang.java.programmer
Subject: Re: ActionEvent Generator
Date: Mon, 02 Feb 2015 09:43:51 -0500
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On 2/1/2015 8:27 PM, Thomas Richter wrote:
> On 02.02.2015 01:49, Jerry Stuckle wrote:
>> Hi, all,
>>
>> I have a need to generate an ActionEvent to drive handlers, and am
>> having trouble finding examples.  It doesn't seem to be as easy as a
>> PropertyChangeEvent, for which there are multiple examples.  I've also
>> looked at some of the Java source code and it seems somewhat convoluted.
>>
>> I don't need something real fancy - just the ability to generate an
>> ActionEvent in my object and have it passed to the handlers.  Can anyone
>> point me to some example code showing an easy way to do this?
> 
> It's actually quite trivial. You create a new ActionEvent() with
> 
> ActionEvent ev = new ActionEvent(...);
> 
> and then have a list of actionListeners, for example in your class as an
> arraylist
> 
> ArrayList<ActionListener> alist = new ArrayList<ActionListener>();
> 
> and simply iterate over the list, calling actionPerformed() for each
> listener:
> 
> for(al : alist) {
>     al.actionPerformed(ev);
> }
> 
> Done. It's really that trivial.
> 
> Greetings,
>     Thomas
> 
> 

Thomas,

Hmmm, this is just too easy! :)  I looked through a lot of code, i.e.
Node, MenuItem and several others, and the code looked much more complex.

Of course I'll need to add a few extra methods, but this gets me on the
right track and I think I can handle the rest.  Thanks!


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Jerry Stuckle
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