Comment 2 for bug 1228789

I would say that what you refer to is "organizing" not "[sub] dividing". Organization is obviously a basic necessity, but sorting by column is the *most* basic. I am indicating to be able to organize more.

I'm suggesting a kind of virtual folder or pseudo-folder system here.

In any given glance at my library, when viewing the Library pane, often the entire pane is filled by dozens of tracks from just one single artist. Scrolling past them to the next artist is twitchy because when there are thousands of tracks, using the scroll bar to move through them happens way too fast to grok all the track names and artists. It also is too delicate, because when the scroll slider resizes proportionately to the number of tracks, as it does in most any browser window, there is just a tiny dot to grab with the mouse or by touch. This is not a bug - any explorer window will present a tiny scroll dot for a folder filled with thousands of files and will make scrolling by scroll bar very twitchy. It is just what happens when the scroll bar resizes proportionately to so many files.

By contrast, when I use, say, the Quick Links option under Browse, it doesn't matter how many tracks I have by that artist, there is *only one object* for each of them (meaning a folder in the tree pane). This means that at a glance, I can see 20+ artists at any given time, as opposed to a very few, generally at most a dozen, in the Library pane. Even if I have a few hundred artists, it is quicker (and has better control) to scroll through a few hundred objects (artist folders) in the left Quick Browse pane than a few thousand objects (tracks) in the Library pane.

One last thing that should be noted is that I meticulously organize all my music files by artist outside of Mixxx. I realize that not everyone does this, and that is yet another reason to include a "folder" or "artist" organizing feature in Library. You could feed Library literally the most enormous jumble of disorganized music files ever, and so long as they had proper ID3 tags, Mixxx could present them in organized "folder" structure.

Wait, one more last thing. If implemented, this same organizing feature could be used to apply to any category currently visible in the columns bar, in other words I may wish to creat a tree in the left pane in Library with virtual folder sorted by Artist, but someone else might prefer to create a virtual folder tree where the folders are Genre, or Year, or even Rating.