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https://issues.apache.org/jira/browse/FLEX-21082?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Justin Mclean resolved FLEX-21082.
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Resolution: Cannot Reproduce
Fix Version/s: Apache Flex 4.10.0
Probably fixed in previous SDK version.
> DataGrid height was not calculated correctly
> --------------------------------------------
>
> Key: FLEX-21082
> URL: https://issues.apache.org/jira/browse/FLEX-21082
> Project: Apache Flex
> Issue Type: Bug
> Components: mx: DataGrid
> Affects Versions: Adobe Flex SDK 3.4 (Release)
> Environment: Affected OS(s): All OS Platforms
> Affected OS(s): All OS Platforms
> Language Found: English
> Reporter: Adobe JIRA
> Fix For: Apache Flex 4.10.0
>
>
> Steps to reproduce:
> 1. Create project and copy these code:
> <mx:DataGrid dataProvider="{totalDataGrid}" rowCount="6">
> <mx:columns>
> <mx:DataGridColumn dataField="name" headerText="Name"/>
> <mx:DataGridColumn dataField="split"
> headerText="Split"/>
> <mx:DataGridColumn dataField="paid" headerText="Paid"/>
> <mx:DataGridColumn dataField="total"
> headerText="Total"/>
> </mx:columns>
> </mx:DataGrid>
> 2. Provide the datagrid data.
> 3. Run the application.
>
> Actual Results: I expect the datagrid to be exactly 6 rows height. I don't
> want the scroll bar at the right. The flex SDK is supposed to calculate the
> necessary height and expand to 100%.
>
>
> Expected Results: I see scroll bar at the right side.
>
>
> Workaround (if any):
> 1. I found if you delete the datagrid's dataprovider, and just let it to be
> blank. The scroll bar does not show up. If you add dataprovider back, then
> scroll bar shows up again. It has something to do with the font size. I tried
> to decrease the font size to something like <9, then scroll bar does not
> show, something greater than 9 will show.
> 2. If you make rowCount to 30 some kind of big number, and test 2 cases. One
> with no data in it, one with data in it. You could make a screenshot or
> something and then compare two data grid. You will notice the row height on
> the datagrid with data is higher. I tried even I specify the row height still
> not help resolve the problem. You probably need rowCount to be something like
> >30 to be human noticeable.
> I researched a lot into this problem. My conclusion is flex sdk does not
> initialize enough space for the font of datagrid, so when you have font
> greater than 9, it will force the datagrid to expand to fit the font. And the
> scroll bar will show up.
>
> I have screenshoted a comparison of workaround 2. You could see one has
> scroll bar, one without. Since the rowCount is only 6. It's not that
> noticeable that the raw heights are different between the two. But when you
> make rowCount to a large number, it's very obvious.
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