Modes for selector Sychronizer and use of arrow key

[kushalkolar]

Right now the Synchronizer for selctors seems to work for pointer events.

• make it work for arrow key events too, so that we can sync selectors between different renderers (and therefore different plot areas)
• have two modes
  • one where it just sychronizes the deltas (this is how it is currently implemented) but Selectors can all be in different positions.
  • another mode where it sychronizes the absolute position of the selectors, this is useful for moving things in sync across different renders (i.e. different plot areas)

[clewis7]

I think this is a good idea and would have a lot of use cases (i.e. animal soup ethogram comparisons lol)

What would be the default though? Syncing with deltas or absolute position? I feel like the latter is more desirable and reflects "syncing" behavior better.

[kushalkolar]

put this on hold until pygfx/pygfx#665 and #413

[kushalkolar]

synchronizer will be removed in #473 , so I'm closing this. This should be handled in higher level libs.