ActionList tutorials and examples?

[IPguy]

Are there some good tutorials on using ActionLists?

When should I consider ActionLists and when should I not use them?

Would I (or should I?) use ActionList to handle popupmenu's, where the popupmenus change depending on the underlying data?

If I have both an Action for a tButton and an OnClick event for that same tButton, what happens first - the action or the event?

[ludob]

From the horses mouth:
http://edn.embarcadero.com/article/27058
http://www.drbob42.com/delphi4/actions.htm

When should I consider ActionLists and when should I not use them?

They are interesting if several controls end up doing the same action and if you want to share properties such as caption, enabled, hint, helpindex,... among these controls. fe: disabling an action disables all controls using that action.
If you just want to perform the same OnClick and are not interested in sharing properties you could as well use common OnClick event handlers.

If I have both an Action for a tButton and an OnClick event for that same tButton, what happens first - the action or the event?

It is one or the other. Setting an action clears the onclick. If the onclick is set afterwards, it'll do the onclick only.

[Leledumbo]

When should I consider ActionLists and when should I not use them?

For me, if you have a thought that someday you'll have at least two controls for the same purpose but not necessarily different way (e.g. TMainMenu and TToolbar), use it.

Would I (or should I?) use ActionList to handle popupmenu's, where the popupmenus change depending on the underlying data?

Yes if the popupmenu functionalities and properties are shared with other controls like the main menu.

If I have both an Action for a tButton and an OnClick event for that same tButton, what happens first - the action or the event?

If you assign from the object inspector, setting one would clear the other AFAIK.

[IPguy]

Thanks for the reference information.

re:

If I have both an Action for a tButton and an OnClick event for that same tButton, what happens first - the action or the event?

If you assign from the object inspector, setting one would clear the other AFAIK.

Testing that with a button (see the attached image from the button OI), I find that both the Action and the event can co-exist.
If I have the event in place, it fires.  If I remove the Event, the Action fires.

Laz 1.1-36568-2.6.1-win32-Vista