ActionWML
From The Battle for Wesnoth Wiki
ActionWML is a summarizing term for all WML actions which can be used in events and some other places.
Types of ActionWML
When a tag permits ActionWML, this means that it permits all of the following:
- direct actions (DirectActionsWML) which have a direct effect on gameplay
- display actions (InterfaceActionsWML) which show something to the user
- internal actions (InternalActionsWML) which are used by WML internally
- conditional actions (ConditionalActionsWML) which contain other actions, which then are (maybe) executed ([if], [switch], [while], [command])
- [event] (see EventWML) which creates a new event handler
- note: [event] can also be a subtag of [unit], [era] and [scenario], where it would not be counted as ActionWML (but has the same syntax).
- [lua] (LuaWML) which contains Lua code to be executed, and
- all tags created from lua with wesnoth.register_wml_action (if they don't fit in one of the categories above)
Where ActionWML can be used
ActionWML can be used
- inside an [event], to define a event handler (see EventWML),
- inside a [then] or [else] of an [if] tag (see ConditionalActionsWML),
- inside a [case] or [else} of a [switch] tag (see ConditionalActionsWML),
- inside the [do] of a [while] tag (see ConditionalActionsWML),
- inside a [command] tag (in [option] or [set_menu_item] or directly as ActionWML) (see InterfaceActionsWML),
- in certain Lua-created tags (if the registered WML action handler interprets the content as ActionWML).
On most other places ActionWML code will either be ignored, give error messages or interpreted differently (there are some tags which are ActionWML and have other meanings in other places, like [event] or [variable]).