D25497: Fix bug re filter-change-autofocus

[Hy Murveit]

murveit added a comment.


  Sorry for not filling that out.  Here's what to check.
  
  Setup:
  Set auto-focus on filter change to all filters.
  Start a capture sequence job with many captures for one particular filter (not the one that will be used for alignment).
  Let a few of the captures occur (so it is not running the first capture any longer).
  At that point a meridian flip should be triggered, (which should in turn start an alignment, and that alignment should use a different filter).
  After the alignment is done, when capture restarts, the capture will switch filters back to the original capture filter, and, as part of that
  filter switch, the FilterManager will trigger an auto-focus.
  What to observe:
  Before this PR, after all of the above, the auto-focus capture and the capture sequence job will both run concurrently, both attempting to access the same main camera (thus breaking the system).
  With this PR, the capture sequence will pause, waiting until the auto-focus is done before resuming the capture sequence.

REPOSITORY
  R321 KStars

REVISION DETAIL
  https://phabricator.kde.org/D25497

To: murveit, mutlaqja, wreissenberger, lancaster
Cc: kde-edu, narvaez, apol
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