No way to determine when GtkInfoBar has completed (un)revealed itself
It's not currently possible to determine when an info bar has finished revealing or un-revaling itself. That is, the revealed
property is updated as soon as it starts revealing, but there is no equivalent of the GtkRevealer child-revealed
property.
Use cases for knowing this include hiding a GtkFrame used to differentiate it from the rest of the UI when the info bar is finally hidden, and displaying another info bar afterwards so that not more than one is shown at once (per the HIG).
Edited by Timm Bäder