Only update selection on focus in TabControl if focus comes from TabItem. #16338
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What does the pull request do?
This is a temporary workaround to help Actipro's issue #15433: they're embedding other controls in a
TabControl
-derived control and they don't want these other controls to change the selection when they're focused.Ideally as that issue says, we'd be moving all interactions out of
TabControl
and intoTabItem
but given that this would be a big behavioural breaking change to anyone deriving fromTabControl
, we need to take smaller steps. This fix, along with them overridingTabControl.OnPointerPressed
andTabControl.OnPointerReleased
should allow them to work around the issue.