gtk:search-bar-handle-event (searchbar event)

searchbar -- a gtk:search-bar widget
event -- a gdk:event instance containing key press events

The gdk:+event-stop+ value 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.

This function should be called when the toplevel 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 the gdk:+event-stop+ value will be returned. The caller should ensure that events are not propagated further.

If no entry has been connected to the search bar, using the gtk:search-bar-connect-entry function, this function will return immediately with a warning. Showing the search bar on key presses

static gboolean
on_key_press_event (GtkWidget *widget,
                    GdkEvent  *event,
                    gpointer   user_data)
{
  GtkSearchBar *bar = GTK_SEARCH_BAR (user_data);
  return gtk_search_bar_handle_event (bar, event);
}


static void
create_toplevel (void)
{
  GtkWidget *window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  GtkWindow *search_bar = gtk_search_bar_new ();


 // Add more widgets to the window...


  g_signal_connect (window,
                   "key-press-event",
                    G_CALLBACK (on_key_press_event),
                    search_bar);
}