[Digikam-devel] [Bug 188925] New: Update of image metadata occurs in foreground.

[Sherwood Botsford]

https://bugs.kde.org/show_bug.cgi?id=188925

           Summary: Update of image metadata occurs in foreground.
           Product: digikam
           Version: unspecified
          Platform: Fedora RPMs
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: digikam-devel at kde.org
        ReportedBy: sgbotsford at gmail.com


Version:            (using KDE 4.2.2)
OS:                Linux
Installed from:    Fedora RPMs

I selected 2000 images, then applied a tag.

I then could do nothing else while digikam updated the images.

Expected behaviour:

Image metadata is handled by a background process, and the program remains
ready to serve user.

Implementing ideas:
* Database is updated immediately.  Database has flags indicating that images
are not in sync.
* Changes in metadata are also written to a journal file.
* Updater program is started.  It starts reading journal entries, writing them
to the files, and clearing the journal entries.

If updater runs as a separate process then it can finish after digikam closes.

For the duration of the updater process, the affected pictures are flagged as
not being in sync.  If user edits a picture, then updater skips the data for
that pic, coming back later.

If program halts, then journal is left un-run.  Updater is started on next
start of digikam.

Would this work?

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