[jira] [Commented] (FLEX-17760) datagrid datatip "[object Object]" for null/unset items

["Jeremy Wischusen (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLEX-17760?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13645517#comment-13645517 ] 

Jeremy Wischusen commented on FLEX-17760:
-----------------------------------------

Still occurring using SDK 4.9.1 on Mac OS X 10.7.5 .
                
> datagrid datatip "[object Object]" for null/unset items
> -------------------------------------------------------
>
>                 Key: FLEX-17760
>                 URL: https://issues.apache.org/jira/browse/FLEX-17760
>             Project: Apache Flex
>          Issue Type: Bug
>          Components: mx: DataGrid
>    Affects Versions: Adobe Flex SDK 3.0 (Release)
>         Environment: Affected OS(s): All OS Platforms
> Language Found: English
>            Reporter: Adobe JIRA
>              Labels: easytest
>
>       Steps to reproduce:
> 1. DataGrid with dataProvider where some column properties are null or unset
> 2. set showDataTips="true" for that column
> *see example code below*
> Actual Results: datatip "[object Object]" on those fields
> Expected Results: no datatip (like for "" fields) or empty datatip when a property is null or unset.
> The bug occurs with both Flex 2.0.1 and Flex 3.0 SDK.
> Explicitly setting dataTipField does not change it and a label function would be provided the entire row data without being passed the dataField.
> Workaround: as an object result of a http service contains null properties for emty nodes/attributes one must
> either manually replace null with "" in the data or use a custom item renderer (e.g. based upon a Label).
> Supposed Reason:
> DataGridColumn.itemToDataTip gets passed the row data; when the (data(tip))field is null or unset
> data[field] != null is false and data = data[field] is not executed, thus data.toString() is performed on the row data.
> There should be a check somewhere to show no datatip at all in this case.
> Example code:
> <?xml version="1.0" encoding="utf-8"?>
> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
>     <mx:Script>
>         <![CDATA[
>             private const gridData: Array = [
>                 { desc: "with item set.", item: "hello" },
>                 { desc: "with empty string", item: "" },
>                 { desc: "with null item", item: null },
>                 { desc: "without item property" }
>             ];
>         ]]
>       >
>     </mx:Script>
>     <!-- expected behavior: no datatip when datatip field is null or unset -->
>     <!-- actual datatip for null and unset properties: "[object Object]" -->
>     <mx:DataGrid dataProvider="{gridData}">
>         <mx:columns>
>             <mx:DataGridColumn dataField="desc" headerText="Description" showDataTips="true"/>
>             <mx:DataGridColumn dataField="item" headerText="Item+Datatip" showDataTips="true"/>
>             <mx:DataGridColumn dataField="item" dataTipField="item" headerText="+dataTipField" showDataTips="true"/>
>         </mx:columns>
>     </mx:DataGrid>
> </mx:Application>
>     

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira