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Old 05-23-2009, 07:13 PM   #1
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Join Date: May 2009
Posts: 10
Default How to fire an event when List selection changes?

I have a list and when an item in the list is selected, I need to fire a function.

At the moment I have a list like this:
<mx:List id="WebsitesUsed"
(The dataProvider gets filled by the user)

I've attached an event listener to the list like so:
ActionScript Code:
WebsitesUsed.addEventListener(ListEvent.ITEM_FOCUS_IN, showWebsitesImageURL);

And then at the moment the function that I want to fire just looks like this:
ActionScript Code:
private function showWebsitesImageURL(event:ListEvent):void {     try{         Alert.show(WebsitesUsed.selectedItems[0].label);     }     catch(e:Error)     {Alert.show(e.message);} }

But I don't get an alert when selecting the list items. It worked when I listened for a ListEvent.ITEM_CLICK instead of ListEvent.ITEM_FOCUS_IN, but the ListEvent.ITEM_CLICK doesn't work for when changing the list selection with the keyboard. I also want to do the same thing for any ListEvent.ITEM_FOCUS_OUT events on the list (so I can access the previously selected item).

Can anyone help me with this?


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Old 05-25-2009, 11:47 AM   #2
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Join Date: May 2009
Posts: 10

I haven't worked out how to use ListEvent.ITEM_FOCUS_IN or ListEvent.ITEM_FOCUS_OUT, but for my purposes ListEvent.CHANGE will just about work.

When I was originally googling for ListEvent, the page that came up was the Flex 2 reference, which doesn't include the ListEvent.CHANGE event, which is why I didn't think of using it.

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