[flexcoders] Re: Count of items in a list

[jmfillman]

Carl,

Yes, this pointed me in the right direction. This is an example of 
what I was trying to accomplish.

<?xml version="1.0"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"; width="500" 
height="620" borderStyle="solid" creationComplete="initApp();">

<mx:Script>
        <![CDATA[
                        import mx.controls.Alert;
            import mx.events.DragEvent;
            import mx.controls.List;
            import mx.managers.DragManager;
            import mx.core.DragSource;
                        
            private function initApp():void {
                var dp:Array = ([
                    {label:"First", data:"1"},
                    {label:"Second", data:"2"},
                    {label:"Third", data:"3"},
                    {label:"Fourth", data:"4"},
                ]);
                listOne.dataProvider = dp;
                listTwo.dataProvider = [];
                listThree.dataProvider = [];
            }
            
            public function slotAvailable(slot:List):void{
                if (slot.dataProvider.length > 0) {
                        slot.dropEnabled=false;
                }
            }
            
            private function freeSlot(slotName:List):void {
                slotName.dropEnabled=true;
            }
        ]]>
</mx:Script>
<mx:VBox width="100%" height="100%" x="0" y="0">
        <mx:HBox width="100%" height="159">
                <mx:List id="listOne" dragEnabled="true" 
dropEnabled="true"></mx:List>
                <mx:List id="listTwo" dragEnabled="true" 
dragMoveEnabled="true" dragComplete="freeSlot(listTwo)" 
dropEnabled="true" dragEnter="slotAvailable(listTwo)"></mx:List>
        </mx:HBox>
        <mx:HBox width="100%" height="161">
                <mx:List id="listThree" dragEnabled="true" 
dragMoveEnabled="true" dragComplete="freeSlot(listThree)" 
dropEnabled="true" dragEnter="slotAvailable(listThree)"></mx:List>
                <mx:Text text="{listThree.dataProvider.length}" 
width="120"/>
        </mx:HBox>
</mx:VBox>
</mx:Application>

--- In flexcoders@yahoogroups.com, "Karl Johnson" <[EMAIL PROTECTED]> 
wrote:
>
> <mx:List id="thisList" dropEnabled="{thisList.dataProvider.length < 
1}" />
>  
> That help?
>  
> Karl
>  
> Cynergy
> 
> ________________________________
> 
> From: flexcoders@yahoogroups.com on behalf of jmfillman
> Sent: Wed 2/21/2007 11:09 AM
> To: flexcoders@yahoogroups.com
> Subject: [flexcoders] Re: Count of items in a list
> 
> 
> 
> This has got to be possible. Please, someone help!!
> 
> --- In flexcoders@yahoogroups.com <mailto:flexcoders%
40yahoogroups.com> , "jmfillman" <jmfillman@> wrote:
> >
> > I'm having difficulty in determining if a list has any items 
already 
> in 
> > the list. For example, if a list already has 1 item, I want to 
set 
> it's 
> > dropEnabled property to false, either when the item is added to 
the 
> > list or when the user attempts to drop a 2nd item. Also, if that 
item 
> > is removed from the list, I want to set dropEnabled to true.
> >
>