D13638: Keeping time since previous periodic refocus

[Eric Dejouhanet]

TallFurryMan created this revision.
TallFurryMan added a reviewer: mutlaqja.
Restricted Application added a project: KDE Edu.
Restricted Application added a subscriber: kde-edu.
TallFurryMan requested review of this revision.

REVISION SUMMARY
  This change causes the time elapsed since the last periodic refocus
  ("Refocus every X minutes" in the capture tab) to be kept between
  sequences. This enforces the periodicity of the refocus procedure.
  
  When a sequence provides a different periodicity than the previous, the
  refocus procedure executes at the specified different periodicity. The
  initial delay before refocus in the new sequence thus is measured from
  the last refocus time, instead of the start of the new sequence. It can
  happen that the new sequence will cause a refocus immediately (in any
  case after the first capture) if there was no or a large periodicity
  in the previous sequence compared to the new.
  
  Warning, as before, in order to use the periodic refocus, a preliminary
  autofocus must be done, either manually in the focus tab or
  automatically through the scheduler step "Focus".

TEST PLAN
  A simple test is provided as "Tests/capture/jobs_using_refocus.esl". To
  use that test, copy "Tests/capture/2x10x20s_refocus1min.esq" to
  "/var/tmp/kstars_tests".
  
  The test vector is made of three schedule jobs on Kocab, using a
  sequence causing a periodic refocus every minute. The first job is
  configuring a Focus step to avoid the capture tab failing to focus.

REPOSITORY
  R321 KStars

BRANCH
  improve__keep_capture_focus_period (branched from master)

REVISION DETAIL
  https://phabricator.kde.org/D13638

AFFECTED FILES
  Tests/capture/2x10x20s_refocus1min.esq
  Tests/capture/jobs_using_refocus.esl
  kstars/ekos/capture/capture.cpp
  kstars/ekos/capture/capture.h

To: TallFurryMan, mutlaqja
Cc: kde-edu, narvaez, apol
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