Create current_deck ControlObject for script access

[Sean M. Pappalardo]

Occasionally scripts need to know which deck is considered current (such as the MIDI_for_light virtual controller.)
We already have code that determines the current deck to show its track name in the title bar and streaming meta-data, so that same code would also update this new CO.

[Michael S. (arbeit-u)]

Yes, i need metadates in Script to increase functional of midi-for-light.
Additional some new controller have a diaplay. Example: Numark Mixdeck Express. So the meta-data using in script are very helpfull.

[Daniel Schürmann (daschuer)]

This should be solved together with: Bug #1115376

[Sean M. Pappalardo (pegasus-renegadetech)]

Not necessarily. What I'm proposing here is just a number: whichever deck is most "in front" in the mix. This can fit into the existing CO structure easily. (Once that other issue is resolved, you could use the number from this CO to get meta-data about the track loaded into the "current" deck.)

[Daniel Schürmann (daschuer)]

I thought you need the number to access the track meta data via [ChannelX] COs.
Once we have a solution for Bug #1115376 you can access the current track and current deck directly.

Or is there an other use for the current_deck CO?

[Swiftb0y (swiftb0y)]

Mixxx now uses GitHub for bug tracking. This bug has been migrated to:
https://github.com/mixxxdj/mixxx/issues/8386