[KPhotoAlbum] Fwd: Patch for loading only one version of a file into the DB.

[Jesper K. Pedersen]

Thanks for the patch, can't push it though, so please redo it:
remote: Audit failure - Commit b08cb03b66d298366e1c22afe0e1687e2d5a5ec5 - 
Email Address - astifter at ubuntu10.(none)

I'm afraid the multiple file version thing is really hard for new users to 
grasp (or even guess). It would be great if someone would pick up the task of 
adding some documentation on this, potentially with a link from the settings 
page.

Cheers

On Sunday 05 June 2011 12:39:04 Andreas Neustifter wrote:
> Forgot mailing list. (Again...)
> 
> 
> ---------- Forwarded message ----------
> From: Andreas Neustifter <andreas.neustifter at gmail.com>
> Date: 5 June 2011 09:31
> Subject: Re: [KPhotoAlbum] Patch for loading only one version of a
> file into the DB.
> To: "Jesper K. Pedersen" <blackie at kde.org>
> 
> 
> Hi all!
> 
> [Since this patch has some history this EMail is longish, if anyone is
> interested in a shorter version, please say so!]
> 
> This patch is still pending, anyone willing to have a look at it? I
> would really like to see this go into KPA:
> 
> https://github.com/astifter/kphotoalbum-fork/commit/7bccdfc3078e628edfa111e
> 3cff394a36120f183
> 
> Since digging through the archives is a little time consuming I have
> prepared the relevant excerpts, first me explaining what the patch is
> all about:
> 
> On 12 December 2010 21:38, Andreas Neustifter
> 
> <andreas.neustifter at gmail.com> wrote:
> > [...]
> > There are some strings and regexes that are constant throughout the
> > NewImageFinder::loadExtraFiles() loop, this patch pulls them out and
> > creates them only once.
> > 
> > This patch creates support for several regexes for the original file
> > version detection. Those regexes are separated with semicolons and
> > processes from left to right. The first regex that matches an existing
> > file is used as original file.
> > 
> > When used with e.g. "(.*)/(.{8})(.*)" as modifiedFileComponent and
> > "\\1/\\2.JPG;\\1/\\2.CR2;\\1/\\2.CRW" as originalFileComponent this
> > stacks all files with the same 8 characters onto each other.
> > 
> > This does not prevent the loading of multiple files but merely stacks
> > them on top of each other.
> 
> Then Jan Kundrát gave some feedback:
> > On 20 December 2010 00:56, Jan Kundrát <jkt at gentoo.org> wrote:
> >> On 12/12/10 21:38, Andreas Neustifter wrote:
> >>> There are some strings and regexes that are constant throughout the
> >>> NewImageFinder::loadExtraFiles() loop, this patch pulls them out and
> >>> creates them only once.
> >> 
> >> Obligatory question -- what's the overhead of a QRegExp() constructor?
> >> I'm asking because QSettings() is documented to have very low overhead,
> >> and it's really good to have optimizations backed up by measurements.
> > 
> > This is only in a small part intended as a runtime optimisation but
> > also as a readability optimisation because
> > NewImageFinder::loadExtraFile now is easier and simpler to read. In
> > generall I find it good to move loop invariant code out of the loop
> > for readability purpose.
> > 
> >>> This patch creates support for several regexes for the original file
> >>> version detection. Those regexes are separated with semicolons and
> >>> processes from left to right. The first regex that matches an existing
> >>> file is used as original file.
> >> 
> >> If you allow entering multiple strings, please also make the GUI look
> >> intuitive. Separating regular expression by semicolon isn't intuitive. I
> >> can't think of anything better that a QTextEdit; I don't believe you'd
> >> like me to suggest using a QListWidget with some delegate for editing
> >> the regular expressions, although I'm sure Jesper would be glad to see
> >> it integrated with the KRegExpEditor :). If you find something
> >> reasonable, please go ahead and use that.
> > 
> > I thought a little about this and I have not found another (equally
> > easy to implement) solution. Is it possible to use it like this for
> > the time being and maybe design a better GUI afterwards?
> 
> Finally the point was raised if stacking is the appropriate way to
> handle multiple versions of a file. I have use the patch for some time
> now and I really works fine, and I do not want to add another way to
> "combine" images together.
> 
> Cheers, Andi
> _______________________________________________
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> KPhotoAlbum at mail.kdab.com
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-- 
Having trouble finding a given image in your collection containing
thousands of images?

http://www.kphotoalbum.org might be the answer.