LIMS-1569: Get image viewer rings from dials if possible

[ndg63276]

JIRA ticket: LIMS-1569
JIRA ticket: LIMS-507

Summary:

Instead of Synchweb drawing fixed circles to show resolution or ice rings, ask the dials rest service to do it for you. Fall back to old method if $dials_rest_url not set.

Changes:

• Make $dials_rest_url available to frontend
• If $dials_rest_url is set, ask the backend for resolution or ice rings, else continue drawing them in JS
• Pass request for resolution or ice rings to dials rest service (and cache images)
• Fix bug where invert checkbox only worked some of the time

To test:

• Set $dials_rest_url and $dials_rest_jwt to the same as prod
• Go to a recent i03 visit (eg the commissioning visit) so images are still on disk, go to a data collection and click on the diffraction image to enlarge it, check the image appears
• Turn on resolution rings, check 5 rings appear in red. Turn on ice rings, check various rings appear in blue. Turn on both and check both appear.
• Check once they have been loaded, the images appear more quickly as they are cached on the server
• Go to an i19-1 visit and find a data collection with a non-zero value for 2 theta. Repeat the above checks, the rings should now be offset and no longer perfectly circular
• Go to an i23 visit and find a recent data collection. Repeat the above checks, the rings should appear 'squashed' (see LIMS-507)
• Check turning "invert" on and off works as expected
• Unset $dials_rest_url and redo the checks on the i03 visit (use a different data collection to avoid caching). Circles should now be drawn by the front end. They will not be accurate for i19-1/i23 visits.

[gfrn]

Enabling invert before toggling resolution/ice rings negates the value of the invert checkbox

E.g.: If you toggle "invert", then "ice rings", the image is no longer inverted. Unchecking "invert" then inverts the image

Is this expected behaviour?

[ndg63276]

Enabling invert before toggling resolution/ice rings negates the value of the invert checkbox

E.g.: If you toggle "invert", then "ice rings", the image is no longer inverted. Unchecking "invert" then inverts the image

Is this expected behaviour?

Nope, that's a bug.

It seems very hard to get the image to load and then invert, they seem to race each other. So I have compromised that any time a new image is loaded (add rings, adding threshold, changing image number), the inversion checkbox will be unchecked, so at least the checkbox matches the image displayed.