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CExtGridCellHeaderFilter can call CExtGridWnd::OnGbwFocusChanged() a lot when either a Text or Value filter is used & a row is focused in the grid.

Can the focused row be cleared when applying filters?

When do you suggest I call FocusUnset()

Are you sure OnGbwFocusChanged() should be called for each row hidden when (Show All) is cleared?

The focus changing notifications are received during sorting and filtering because the grid control tries to keep the same cells selected and focused after re-sorting or re-filtering. The CExtGridWnd class is derived from the CExtGridDataProvider::IDataProviderEvents interface which provides the OnDataProviderSortEnter() and OnDataProviderSortLeave() virtual methods. You can remove focus and/or selection from any cells in the overridden OnDataProviderSortEnter() virtual method. The CExtGridWnd::OnGridFilterUpdateForRows() virtual method applies filtered state to grid rows. You can also override it. Your method also can remove focus and/or selection before invoking the parent class method.

You should invoke the CExtGridBaseWnd::FocusUnset() method.

A bit more info ... the following steps will show the problem everytime:

1. Select the last row in the grid

2. Clear ’(Show All) in ’Value Filters’

OnGbwFocusChanged() is now called for every row in the list.