WidgetActionActivateFunc
typealias WidgetActionActivateFunc = (widget: Widget, actionName: String, <Error class: unknown class>?) -> Unit
The type of the callback functions used for activating actions installed with gtk_widget_class_install_action().
The @parameter must match the @parameter_type of the action.
param
widgetthe widget to which the action belongsparam
actionNamethe action nameparam
parameterparameter for activation