JDAT-1223: Tiling images

[pllim]

Arrange multiple image viewers in a grid. ~Implement a "Tile" Button to switch between a "tile view" and allow the user to decide the layout that way.~

UI/UX: https://www.stsci.edu/~jkotler/Imviz/#id=9cl0gf&p=imviz_ui&c=1

• [x] Enable ordering/location of tiled images to be changed (e.g., drag them around using ipygoldenlayout).
• [x] Removable viewers.

Deferred: "Tile" button. Exact UI/UX appearance being handled in the frontend in separate ticket(s).

https://jira.stsci.edu/browse/JDAT-1223

TODO

• [x] ~Fix buggy "x" button behavior.~ See "Can you close one of the tiles?" in https://github.com/spacetelescope/jdaviz/issues/521#issuecomment-848087072 (Deferred to #663)

[pllim]

@astrofrog , @PatrickOgle keeps asking about how various other features (e.g., WCS locking at #613 and so on) would work with this one. Perhaps this needs to be implemented sooner than later.

[pllim]

So, in reviewing #613 , this might already be possible, just not exactly looking like the UX/UI design.

Standalone

Classic notebook

[pllim]

To answer some more questions...

Can I load multiple extensions and display them in separate tiles?

Yes. Example:

imviz.load_data('jbt7a3kaq_flc.fits[SCI]')  # SCI,1
imviz.load_data('jbt7a3kaq_flc.fits[DQ]')  # DQ,1
imviz.load_data('jbt7a3kaq_flc.fits[SCI,2]')
imviz.load_data('jbt7a3kaq_flc.fits[DQ,2]')

Disclaimer: Imviz parser behavior might change in the future depending on how #600 turns out.

Can you close one of the tiles?

Yes, click on the "x" next to "Test" or to the far right but sometimes it closes more than one windows or all of them! I am not sure what drives the inconsistent behavior. @astrofrog , do you know?

Can you keep moving the tiles?

Yes. Click and drag. There will be dotted lines to guide you.

[pllim]

The bug will be followed up on over at #663 . This feature is marked as complete.