I found a problem while dragging an item from one grid to another grid which
has no items:
"RangeError: Index '1' specified is out of bounds.
at
mx.collections::ListCollectionView/addItemAt()[/Users/justinmclean/Documents/ApacheFlex4.11.0/frameworks/projects/framework/src/mx/collections/ListCollectionView.as:591]"
As far as I understand the code the calculated dropIndex in LayoutBase
should be 0 and it is 1. The method looks like this:
/ protected function calculateDropIndex(x:Number, y:Number):int
{
// Always add to the end by default.
return target.numElements;
}/
If there is already an item in the target DataGrid the problem does not
occur.
I created a small example to reproduce the behaviour:
/<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009";
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx" width="650" height="500"
creationComplete="initApp();">
<s:layout>
<s:VerticalLayout/>
</s:layout>
<fx:Script>
</fx:Script>
<s:HGroup>
<s:VGroup>
<s:Label text="Available Albums"/>
<s:DataGrid id="srcgrid"
dragEnabled="true"
dropEnabled="true"
dragMoveEnabled="true">
<s:ArrayList>
<s:GridColumn dataField="Artist"/>
<s:GridColumn dataField="Album"/>
<s:GridColumn dataField="Price"/>
</s:ArrayList>
</s:DataGrid>
</s:VGroup>
<s:VGroup>
<s:Label text="Buy These Albums"/>
<s:DataGrid id="destgrid"
dragEnabled="true"
dropEnabled="true"
dragMoveEnabled="true">
<s:ArrayList>
<s:GridColumn dataField="Artist"/>
<s:GridColumn dataField="Album"/>
<s:GridColumn dataField="Price"/>
</s:ArrayList>
</s:DataGrid>
</s:VGroup>
</s:HGroup>
<s:Button id="b1"
label="Reset"
click="initApp()"
/>
</s:WindowedApplication>/
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