This function should be called when the top-level
window which contains the search bar received a key event.
If the key event is handled by the search bar, the bar will
be shown, the entry populated with the entered text and GDK_EVENT_STOP
will be returned. The caller should ensure that events are
not propagated further.
If no entry has been connected to the search bar, using
gtk_search_bar_connect_entry(), this function will return
immediately with a warning.
GDK_EVENT_STOP if the key press event resulted in text being entered in the search entry (and revealing the search bar if necessary), GDK_EVENT_PROPAGATE otherwise. Since 3.10
This function should be called when the top-level window which contains the search bar received a key event. If the key event is handled by the search bar, the bar will be shown, the entry populated with the entered text and GDK_EVENT_STOP will be returned. The caller should ensure that events are not propagated further. If no entry has been connected to the search bar, using gtk_search_bar_connect_entry(), this function will return immediately with a warning.