Added function

source/libublsettings-gtk3-misc.c

@@ -386,11 +386,23 @@ gboolean _yon_on_gtk_revealer_set_from_switch(GtkSwitch *target, int status, Gtk
     return 0;
 }
 
+gboolean _yon_on_gtk_revealer_set_from_expander(GtkExpander *target,GtkRevealer *revealer){
+    int status = gtk_expander_get_expanded(target);
+    gtk_revealer_set_reveal_child(revealer,!status);
+    gtk_revealer_set_transition_type(revealer,!status?GTK_REVEALER_TRANSITION_TYPE_SLIDE_DOWN:GTK_REVEALER_TRANSITION_TYPE_SLIDE_UP);
+    return 0;
+}
+
 void yon_gtk_revealer_set_from_switch(GtkRevealer *revealer, GtkSwitch *target){
     g_return_if_fail(GTK_IS_REVEALER(revealer)&&GTK_IS_SWITCH(target));
     g_signal_connect(G_OBJECT(target),"state-set",G_CALLBACK(_yon_on_gtk_revealer_set_from_switch),revealer);
 }
 
+void yon_gtk_revealer_set_from_expander(GtkRevealer *revealer, GtkExpander *target){
+    g_return_if_fail(GTK_IS_REVEALER(revealer)&&GTK_IS_EXPANDER(target));
+    g_signal_connect(G_OBJECT(target),"activate",G_CALLBACK(_yon_on_gtk_revealer_set_from_expander),revealer);
+}
+
 struct revealer_wrapper {
     GtkWidget *revealer;
     GtkWidget *window;

source/libublsettings-gtk3.h

@@ -532,5 +532,6 @@ int yon_calendar_get_last_date();
 config_str yon_resource_open_file(const char *path, int *size);
 
 void yon_gtk_revealer_set_from_switch(GtkRevealer *revealer, GtkSwitch *target);
+void yon_gtk_revealer_set_from_expander(GtkRevealer *revealer, GtkExpander *target);
 
 void yon_gtk_window_set_shrinking_from_revealer_resizing(GtkWindow *window, GtkRevealer *revealer);