Primitive Actions

Primitive Actions

As for any widget, there is an action to match each callback. Actions trigger callback execution and standard widget responses, if any. Primitive class actions are as follows:

Help(): If there is no callback defined for the widget, this action propagates the help action to the widget's parent. If no callback is defined up to the root widget, the action is simply ignored.
Destroy(): This action is called before widget destruction, to allow an application to perform automatic cleanup before exiting.