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How do I create an item editor in a flex list component so that it changes?

I have a list component and I have an item editor for the items in the list. I would like to have a button that the user clicks when they are done with their changes, because I have to edit multiple chunks of data in the editor and I would also like to validate the data before closing the editor. I just don't know what to do in the button click event to close the item editor and commit it to the data provider.

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You want to use a validator to validate the data, and I think it might be possible to do something with updateComplete and change events to delay the update of the list component:



http://livedocs.adobe.com/flex/201/html/wwhelp/wwhimpl/common/html/wwhelp.htm?context=LiveDocs_Book_Parts&file=celleditor_073_17.html

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I would use data binding and give Flex the job for you.

There is a myObject with a bindable property myList: IList. Bind the screen to this object.

When you start editing, copy this list.



In MouseEvent.CLICK:

var ed:Editor // Your list editing object.
var edProvider:IList = ed.dataProvider;
var targList:IList   = myObject.myList; 

var bool:Boolean     = ( myObject.myList.length > edProvider.length );
var len:int          = ( bool )? targList.length: edProvider.length; 

var item:*           = null;

for( var i:int = 0; i < len; i++ )
{
    try // a "just in case".  You probably will never have a problem.
    {
        item = edProvider.getItemAt( i );
        targList.setItemAt( item, i );
    }
    catch( error:Error )
    {
        continue;
    }
}
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To handle editing multiple fields in a List control, you need to catch the ItemEditEnd event and then manually modify the fields of interest.

See "Example: Using a Custom Item Editor with a List Control" here - http://livedocs.adobe.com/flex/3/html/help.html?content=celleditor_9.html#226555 .

Usually the List will handle dispatching this event for you when you focus from a cell. I'm not sure about its properties from my head, but you should be able to construct this event in your click handler and then just dispatch it yourself.

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