static void SnoopChildPopupClosed(object sender, EventArgs e)
{
var popup = (Popup)sender;
if (popup.Child != null)
{
// Cannot use 'popup' as a snoop part, since it's not
// going to be in the PopupRoot's visual tree. The closest
// object in the PopupRoot's tree is popup.Child:
SnoopPartsRegistry.RemoveSnoopVisualTreeRoot(popup.Child);
}
}
private static void SnoopChildPopupOpened(object?sender, EventArgs e)
{
var popup = (Popup?)sender;
if (popup?.Child is not null)
{
// Cannot use 'popup' as a snoop part, since it's not
// going to be in the PopupRoot's visual tree. The closest
// object in the PopupRoot's tree is popup.Child:
SnoopPartsRegistry.AddSnoopVisualTreeRoot(popup.Child);
}
}
