Frédéric Leroy created FLEX-33944:
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Summary: Cannot scroll to the bottom when using variable row
height and calculateRowHeight() with some rows are very large
Key: FLEX-33944
URL: https://issues.apache.org/jira/browse/FLEX-33944
Project: Apache Flex
Issue Type: Bug
Components: Advanced Data Grid
Affects Versions: Apache Flex 4.9.0, Adobe Flex SDK 4.6 (Release), Apache
Flex 4.11.0
Reporter: Frédéric Leroy
How to reproduce:
1. Run the attached Main.mxml application
2. Scroll down
Observed:
Cannot scroll past the large row.
Expected:
It should be possible to scroll past the large row.
The calculateRowHeight() method of the ADG can be overridden to allow to
customize the height of rows in variable row height mode. In our application we
override it to synchronize the layout of rows with an external component.
The problem here is that calculateRowHeight() this method is not used by the
ADG in all places where the height of rows is measured. In particular it is not
used in AdvancedDataGridBaseEx.adjustVerticalScrollPositionDownward(). As a
result when some row get a large height it becomes impossible to scroll past
such a large row.
See the attached AdvancedDataGridFixed extends AdvancedDataGrid and implements
a workaround for this issue, lines 194-213.
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