Make Swap Position compatible with Layout Protection

[Jip-Hop]

I'd like to protect the layout of my displays. However, I'm using PbP on my monitor and connect a single MacBook to both inputs of the monitor. This may cause the displays to be come misidentified and swapped. Fortunately there's the handy Swap Position button in the menubar. But swapping a display like this should also swap all the settings for these displays in Layout Protection, else the swap won't be effective.

Due to the above Layout Protection, clicking Swap Position does nothing.

[waydabber]

Hmm. Indeed. Might be complicated to make this work well.

[Jip-Hop]

Probably I'm oversimplifying things, but wouldn't it work to swap the Stystem UUID's for both displays? I mean:

Before:

System UUID ABCD = Display 1
System UUID EFGH = Display 2

After:

System UUID ABCD = Display 2
System UUID EFGH = Display 1

Since Swap Position only applies to identical displays I can't immediately think of any unwanted side effects.

[waydabber]

The problem is that BetterDisplay may recognize the displays properly (depending on how the identification method is configured - for example if ioreg location is used), only macOS might mix them up - in this case it would be wrong to generally swap the displays (except for their positions). I think I will make it so that the displays are swapped when both displays use the default UUID identification - in which case if the system mixed them up, the app must be confused as well.

[waydabber]

I added a logic to swap the UUIDs of the two displays and remove them and let configuration redetect them. I am not sure how well it works though as I don't happen to have two identical displays to test. Let me know if you'd like to test the update and report back whether this works (or breaks everything horribly). :)

[waydabber]

Added this to the latest internal pre-release. Enable it under Settings/Applications/Updates/Pre-release and then Internal... Also do an update. Let me know if this does not work or what happens if you try it.

[Jip-Hop]

This seems to work great when using System UUID match identification! I can now swap displays with layout protection enabled. Thanks a lot! It doesn't work with Basic + extended + location identification. I'm not testing the location identification method but I think it doesn't eliminate my screen mixup problem.

[waydabber]

Yep. Location identification does not work that well in some scenarios as the ioreg location can also move for identical connections. I swap the UUID only with this solution. 99.5% of users use the System UUID identification anyway.