[jira] [Resolved] (FLEX-27648) ViewStack.getItemIndex() throws error instead of returning -1 when item is not a child of the ViewStack

["Justin Mclean (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLEX-27648?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Justin Mclean resolved FLEX-27648.
----------------------------------

       Resolution: Fixed
    Fix Version/s: Apache Flex 4.11.0

Checked into develop branch
                
> ViewStack.getItemIndex() throws error instead of returning -1 when item is not a child of the ViewStack
> -------------------------------------------------------------------------------------------------------
>
>                 Key: FLEX-27648
>                 URL: https://issues.apache.org/jira/browse/FLEX-27648
>             Project: Apache Flex
>          Issue Type: Bug
>          Components: mx: View Stack
>    Affects Versions: Adobe Flex SDK Previous
>         Environment: Affected OS(s): Windows
> Affected OS(s): Windows
> Browser: Other (specify version)
> Language Found: English
>            Reporter: Adobe JIRA
>              Labels: easyfix, easytest
>             Fix For: Apache Flex 4.11.0
>
>
>       Steps to reproduce:
> 1. create a ViewStack with no children and call getItemIndex()
> <fx:Script>
> <![CDATA[
> 	import mx.controls.Alert;
> 	protected function init(event:Event):void
> 	{
> 		try
> 		{
> 			event.target.getItemIndex(this);
> 			Alert.show("no error","ok");
> 		}
> 		catch (e:ArgumentError)
> 		{
> 			Alert.show(e.message,"a ha!");
> 		}
> 	}
> ]]
>       >
> </fx:Script>
> <mx:ViewStack initialize="init(event)" />
>  
>  Actual Results:
> An ArguementError with message "Error #2025: The supplied DisplayObject must be a child of the caller." is thrown
>  
>  
>  Expected Results:
> -1 should be returned as specified by mx.collections.IList.getItemIndex() "Returns int - The index of the item, or -1 if the item is not in the list. "
>  
>  
>  Workaround (if any):
>  
>  A try/catch like above can be used as a work around but ideally this can be fixed directly in ViewStack so subclasses like TabNavigator are not affected. 
> Proposed fix:
> public function getItemIndex(item:Object):int
> {
> 	if (contains(item as DisplayObject))
> 	{
> 		return getChildIndex(item as DisplayObject);
> 	}
> 	else
> 	{
> 		return -1;
> 	}
> }
>     

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