https://bugs.kde.org/show_bug.cgi?id=456973

            Bug ID: 456973
           Summary: give a warning when modify ratings on huge number of
                    images
           Product: digikam
           Version: unspecified
          Platform: unspecified
                OS: All
            Status: REPORTED
          Severity: wishlist
          Priority: NOR
         Component: Tags-Engine
          Assignee: digikam-bugs-n...@kde.org
          Reporter: dirk.vard...@web.de
  Target Milestone: ---

SUMMARY

there is no undo functionality for star rating (Bug 142753). This is especially
dangerous when modifying the rating on a huge number  of images, which can
easily happen unintentionally.

Example (this happens several times to me):
I rate all my holiday images (>1000). Images with > 3 stars should appear in a
slideshow. For fine tuning (when a lot of work has already be done) I filter on
>3 stars then select all and start presentation (alt sft F9). Stepping through
the presentation I notice an image that should not appear and go back to modify
it (rate with 0 stars). BUT still all >3 star images are selected! As a
consequence the complete work of rating is lost!

As undo functionality seams to be very much effort, I would propose to do a
warning, when changing ratings (or other tags) while all images are selected,
e.g.: WARNING: this will modify xxxx images, do you really want do continue?
In my specific situation it might also be good to clear the selection after
returning from presentation.

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