[Qt-interest] QCompleter behaviour in table view

[Chris W]

Hi All,

I have a small problem with a popup completer in a QTableView that some
kind soul might have a fix/workaround for.   Source code to demo the
problem is here: http://pastebin.com/TMT1v1LU

A QLineEdit with completer in a table view only displays expected
completion behaviour under some circumstances.  If you double-click or
enter edit mode explicitly (F2 on Linux) the completer works correctly
on the cell. If you trigger edit mode by just typing with a cell
selected (QAbstractItemView::AnyKeyPressed edit trigger) the result in
the edit box is not as expected, the popup does not show, and focus is
lost from the cell under edit.   I assume the popup is grabbing focus
and taking the cell back out of edit mode.

With the example code: 
With the current cell but not in edit mode at (0,0) type 'b'
Expect a popup completer showing 'bar' and 'baz' and the cell in edit
mode containing 'b'
See 'b' in a cell that is not in edit mode, no popup.
Type 'a' into the same cell.
Expect a popup completer showing 'bar' and 'baz' (still) and the cell in
edit mode containing 'ba'
See 'a' in a cell that is not in edit mode, no popup. 

The debug indicates updates to the model when none should be expected
until the user shifts focus.

I have seen mention of using event filters to stop the focus hijack but
I haven't been able to get my head around exactly where the filter
should be placed or how best to identify the offender.

Any thoughts in Qt interest land?

Regards,
Chris