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https://issues.apache.org/jira/browse/FLEX-33934?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alex Harui updated FLEX-33934:
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Assignee: (was: Alex Harui)
> Holding Shift+TAB pressed in DataGrid makes focus jump to textField outside
> grid, then back to grid editors, and so on
> ----------------------------------------------------------------------------------------------------------------------
>
> Key: FLEX-33934
> URL: https://issues.apache.org/jira/browse/FLEX-33934
> Project: Apache Flex
> Issue Type: Bug
> Components: Focus Manager, Spark: DataGrid
> Affects Versions: Apache Flex 4.11.0
> Environment: Windows 8, Adobe AIR 3.9
> Reporter: Mihai Chira
> Attachments: _DataGridFocus.fxp
>
>
> Steps to reproduce:
> 1. Import and run the attached project.
> 2. Double click on Brazil to enter edit mode
> 3. Press and hold Shift+TAB to tab backward through components
> Actual behaviour: focus jumps back and forth between the grid's item editors
> and the text field outside the grid.
> Desired behaviour: focus jumps backward only through the editors, not
> involving the text field outside the grid.
> Note: this happens without problems when Shift+TAB is pressed with lower
> frequency.
> Note: in our application we have the same problem with the forward focus
> (Shift not pressed), which I could not reproduce in this simple app. And
> since we're creating many grids whose cells should be editable similarly to
> Microsoft Excel's, the priority for us is high.
> Hints:
> 1. From my understanding, DataGridEditor.editor_keyFocusChangeHandler() and
> FocusManager.keyFocusChangeHandler() respond to the same event
> (FocusEvent.KEY_FOCUS_CHANGE), but listen to different objects for it. When
> things work correctly, DataGridEditor reponds to the event once the user
> presses (Shift+)TAB in a grid's item editor, and (does the necessary work to
> create and focus the next editor and then) calls preventDefault() on the
> event, which tells the FocusManager not to apply its default behaviour. All
> works fine.
> 2. However, when (Shift+)TAB is held pressed, or pressed very quickly, what
> seems to happen at times is that
> DataGridEditor.editor_keyFocusChangeHandler() is never called. From what I
> can tell from tracing the event instance in FocusManager, that's because the
> event's target is no longer the textDisplay inside the item editor, but the
> strange
> "_DataGridFocus0.WindowedApplicationSkin2.Group3.contentGroup.__DataGridFocus_DataGrid1.UIComponent37"
> instance. This means that DataGridEditor cannot respond to this event, since
> it's not thrown by the editor it's listening to.
> 3. I also put traces where the editor is removed and where it's created in
> DataGridEditor, which showed that when the unusual event is thrown (see hint
> #2) the item editor is still not null, is still on stage, and still has the
> event listener for FocusEvent.KEY_FOCUS_CHANGE. So it's not that the editor
> has been destroyed - it's just that the event is thrown by another component.
> NOTES:
> * using selectedIndex instead of selectedItem works without error.
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