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From "Mario Specht (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLEX-33864) spark DataGrid drag and drop on empty grid causes RangeError
Date Wed, 30 Oct 2013 12:08:25 GMT
Mario Specht created FLEX-33864:
-----------------------------------

             Summary: spark DataGrid drag and drop on empty grid causes RangeError
                 Key: FLEX-33864
                 URL: https://issues.apache.org/jira/browse/FLEX-33864
             Project: Apache Flex
          Issue Type: Bug
          Components: Spark: DataGrid
    Affects Versions: Apache Flex 4.11.0
            Reporter: Mario Specht
         Attachments: TestDDDataGrid.fxp

I found a problem while dragging an item from one grid to another grid which has no items.

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. 

Also headers are not shown in the empty grid

Sample atttached



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