ESourceSelector @esourceselector: the object which received the signal. @arg1: @event: @Returns: @esourceselector: the object which received the signal. @esourceselector: the object which received the signal. @list: @Returns: @selector: @source: @selector: @source: @selector: @source: @Returns: @selector: @Returns: @list: @selector: @show: @selector: @Returns: @selector: @state: @selector: @Returns: @selector: @source: @selector: @Returns: