[IronPython] Strange IPY / WPF behavior on a ListBox

Ken MacDonald drken567 at gmail.com
Fri Apr 30 21:08:42 CEST 2010

I'm seeing some weirdness - I had a small popup dialog working in WPF/IPY
where I had a ListBox with way too many elements to display, say about 30 or
so where the available space would hold 4 or 5. I selected one of the
elements (a ListBoxItem in the single selection ListBox), and executed
BringIntoView() <http://msdn.microsoft.com/en-us/library/ms598110.aspx> on
the ListBoxItem. Worked great, the selected item showed up.

Now, I've had to add more stuff to the dialog (an on-screen touch keyboard)
and made the whole dialog modal; now I can't get the BringIntoView() to
work. I have handlers on several events to try and get the BringIntoView()
to happen, considering it has to be fired while it is Visible, and the
handlers are getting fired, but I never see the selected item get scrolled
into view. I've even attached handlers to some unrelated events like
TextBox.TextChanged that I *know* are happening well after the whole dialog
is rendered. Still no luck. Everything else in the ListBox works just as it
did before, but now I can no longer show the 'default' item when the dialog
starts. Anyone have any interesting clues? I've been at this most of the day
trying different handlers, etc. and it's making no sense whatsoever.
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