> i.e. is a playlist a container for tracks and other playlists? or just a container for tracks?

MM functionailty and labelling is #1. Is #2 a proposal? It would require functionality change... and diminishment.

> but double-clicking a playlists that contains only other playlists will not play anything.

Sounds undesirable to me. Others?

> On the other hand, in the Auto-sync list, a playlist is considered (sometimes) to be a parent container of other playlists.

Good thing too! :)

> I think that we need to answer this before looking into the details.

I think my consistency case stands regardless, but ... I'm patient! :)

I think that MM first needs to resolve what a Playlist means. i.e. is a playlist a container for tracks and other playlists? or just a container for tracks? Currently MM is kind of schizophrenic about this--in the tree, it shows hierarchical relationships, but double-clicking a playlists that contains only other playlists will not play anything. On the other hand, in the Auto-sync list, a playlist is considered (sometimes) to be a parent container of other playlists.

I'm not sure what the best approach is, but I think that we need to answer this before looking into the details.

See:
http://www.ventismedia.com/mantis/view.php?id=204
http://www.ventismedia.com/mantis/view.php?id=5371

-Rusty

> I think it is quite impossible to have this feature for users with large DBs
> and many playlists nested to a one playlist. Due to this performance restriction...

Why impossible Ludek? I see no restriction - the processing is a background process. As to the performance itself, well, would totalling for Playlists be much slower than for Music? For Music is fast enough - ~1s here for ~10,000 files in ~1,000 folders.

> the consistency issue is quite disputative, when you select a parent playlist in
> Main explorer tree you also don't see tracks of the children playlists

My consistency issue is /internal/ consistency, and the tree does have that (you don't see children when you select a [i]music [/i]location). I think equal consistency in device profile would avoid confusion.

And surely at least the misleading [b]No tracks[/b] should be removed. Since recently, no-where else does MM show "No tracks" where there are tracks within.

Although it could be appreciated by users like you I think it is quite impossible to have this feature for users with large DBs and many playlists nested to a one playlist.
Due to this performance restriction I wouldn't change this.
In addition the consistency issue is quite disputative, when you select a parent playlist in Main explorer tree you also don't see tracks of the children playlists in the tracklist.

... inconsistent.

In Device Profile trees, a tooltip shows the number of tracks in a node. Very nice.

But in Music it includes children, and in Playlists it does not. This is misleading and confusing. I suggest it should include children in Playlists too.

EDIT(TC) Tracked at http://www.ventismedia.com/mantis/view.php?id=6858