I've searched to no avail

Question

Ok so, I have a DataGrid that is binded to some XML data. The
last column in the grid renders a Link button which when clicked
should change the view state to the selected index's XML property I
have set that corresponds to a view state i have already named.
Here's a few lines...
First I have this number to keep track of the selected
item...
<mx:Number
id="selectedMapIndex">{myMapGrid.selectedIndex}</mx:Number>
here's the code for the last column...
<mx:DataGridColumn dataField="scrims" headerText="Goto
Strat" width="50">
<mx:itemRenderer>
<mx:Component>
<mx:LinkButton label="Strat"
click="currentState='{mapInfo.map[selectedMapIndex].mapStrat}';"
width="50"/>
</mx:Component>
</mx:itemRenderer>
</mx:DataGridColumn>
Again any help you can provide would be awesome. "mapInfo" is
the xml object name, "map" is the item, "mapStrat" contains the
text in xml that is identical to the name of my states.

Answer 1

When you work with in-line itemRenderers using
<mx:Component> its as if the MXML and ActionScript were in
another file. That is, they have their own scope. You cannot simply
refer to variables in the file. So within the
<mx:Component>...</mx:Component> mapInfo et al have no
meaning.
You need to use outerDocument:
outerDocument.currentState='{outerDocument.map[outerDocument.selectedMapIndex...
etc etc
Here's an easier way. The "click" event is a bubbling event.
Meaning that if you don't catch it within the <mx:Component>
it will go up to the next component, the DataGrid. So you can do
this:
<mx:DataGrid
click="currentState={mapInfo.map[selectedMapIndex].mapStrat}" ...
>
The trouble with this approach is that ANY click within the
DataGrid will be caught. So you need to test the event. The better
thing to do is put the event handler into a function:
<mx:DataGrid click="handleClick(event)" ... >
private function handleClick( event:Event ) : void {
if( event.currentTarget is LinkButton ) { /* put here your
currentState = ... code */
You'll have to test it and get any kinks out since I just
wrote that off the top of my head.
--peter