GtkToolButton @label: @icon_widget: @Returns: @stock_id: @Returns: @button: @label: @button: @Returns: @button: @use_underline: @button: @Returns: @button: @stock_id: @button: @Returns: @button: @icon: @button: @Returns: @button: @label_widget: @button: @Returns: @toolbutton: the object which received the signal.