SugarCube 2: combining click and back macros?

mixvio

I am using the <<click>> macro to fire a sound effect when the player clicks on a button, but I'm having difficulty getting this to work with the button I've set up to undo choices. It works fine progressing forward:

<<click "Continue" "Start3">><<playsound $buttonGo>><</click>>

But it breaks when I try to undo:

<<click "⇦ Undo" "back">><<playsound $buttonBack>><</click>>

It either looks for a passage titled back when I use quotes, or throws up an error if I don't. I've looked at the other macros available and can't seem to figure out the best way to incorporate this.

Any ideas?

Claretta

Undo is a separate macro. Therefore, you should put it inside the click, not in the click macro.

Eg

<<click "Go Back">><<playsound>><<undo>><</click>>

mixvio

I get this when I do what you suggest:

Apologies! An error has occurred. You may be able to continue, but some parts may not work properly.

Error: macro <<undo>> does not exist.

Stack Trace:
Error: macro <<undo>> does not exist
    at Function._createClass.value (<anonymous>:39:15739)
    at HTMLAnchorElement.<anonymous> (<anonymous>:40:10822)
    at HTMLAnchorElement.<anonymous> (<anonymous>:38:13828)
    at HTMLAnchorElement.n.event.dispatch (<anonymous>:24:7516)
    at HTMLAnchorElement.r.handle (<anonymous>:24:5597)

I replaced undo with the back macro, which doesn't return an error but also doesn't do anything either unfortunately. The button/link is there, but it's non-functional.

Claretta

The back macro as it is written seems to be a click macro in itself. Therefore, you won't be able to include it in a click macro. You might be able to write your own macro using the API, but TheMadExile will know more about what's possible.

mixvio

Yeah I'd worked out that much sadly, I was trying to see if there was a way to merge the two together.

greyelf

A quick look at the Engine API documentation lists a Engine.backward() function.

So something like the following:

<<click "Go Back">><<playsound>><<run Engine.backward()>><</click>>

mixvio

Oh excellent, that seemed to do the trick! Are there any issues using that macro vs something else?

Also does this correctly "undo" and go back a passage (IE, wiping it from history) or does it just press forward to the previous passage? I couldn't quite determine it from that documentation explanation.

Claretta

It directly states that it undoes, not adds anything to history.

"Rewinds the full history by one moment (i.e. undoes the moment)"