D25645: New UI to allow the user to modify the stretch being used.

[Hy Murveit]

murveit created this revision.
murveit added reviewers: mutlaqja, lancaster, wreissenberger.
Herald added a project: KDE Edu.
Herald added a subscriber: kde-edu.
murveit requested review of this revision.

REVISION SUMMARY
  In fitsviewer, the toggle stretch button is removed and replaced with a
  stretch bar at the bottom of the window. It is always there and allows
  the user to turn on/off stretching, use the automatically generated stretch
  or modify the stretch parameters. As before, this is a display-only change
  to the image, it does not modify the image itself.

TEST PLAN
  In kstars, open a new fits file with the auto-stretch option either set 
  or not, and see if it displays accordingly. Then switch the other way
  using the UI and play with the sliders to adjust the stretch. Try another 
  image also. Go back to the first image, it should remember the parameters
  that were last used. Should work similarly with images from capture.
  Evaluate the UI.

REPOSITORY
  R321 KStars

BRANCH
  stretch-bar-ui (branched from master)

REVISION DETAIL
  https://phabricator.kde.org/D25645

AFFECTED FILES
  kstars/fitsviewer/fitstab.cpp
  kstars/fitsviewer/fitstab.h
  kstars/fitsviewer/fitsview.cpp
  kstars/fitsviewer/fitsview.h
  kstars/fitsviewer/fitsviewer.cpp
  kstars/fitsviewer/fitsviewer.h
  kstars/fitsviewer/stretch.cpp
  kstars/fitsviewer/stretch.h

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