[wxCode-users] wxTreeListCtrl EnsureVisible

[Tierra <et...@gm...>]

I'm having trouble getting EnsureVisible to work on any new items I've
just added to my wxTreeListCtrl. I've played with the sample, and
found that it also doesn't work with new items inserted into the
wxTreeListCtrl. The problem seems to be that m_x, m_y, etc haven't
been calculated on new items just inserted. EnsureVisible calls to
those items will actually scroll the window back to (0,0).

There is one case where it does work on a new item however (and those
wxTreeListItem values have been calculated). That's whenever the new
item added is the first child of a parent item (though I'm still not
sure why it works in this case).

I have been assuming the call to wxYieldIfNeeded() in EnsureVisible
(if m_dirty) is there to make sure those values are calculated on new
items, but it doesn't seem to help. I've also tried a call to
wxYield() in my code after inserting the new item, but before calling
EnsureVisible. Nothing so far has helped.

The behaviour is the same in both wxWidgets 2.6.1 as well as 2.6.2.
I've played with this on an older released version of wxTreeListCtrl
as well as CVS with no change (on that note, some kind of version info
would be nice to track changes of wxTreeListCtrl). This can all be
reproduced by adding an EnsureVisible call to the
AppFrame::OnInsertItem method in the wxTreeListCtrl sample in CVS on
the new wxTreeListItem returned from InsertItem().

Regards,
Bryan Petty