Hi Daniel,

 > We have discussed such a model earlier, but it was difficult to
 > generalize is in the back-end.
Hm, I don't really get that point.

Each library Feature would need
  * a 'default' widget, if no child element of it is selected (Playlists 
would display all Playlists there),
  * a widget for the left pane (for Playlists that would be a tree/list 
of all the playlists in DB)
  * a widget if a child element is selected (which would be the 
track-table-widget for the Playlists).
  * a list of child-Elements to display in the dropDown

despite the last point, all that is also needed and planned for the 
other approach - isn't it? And such a List wouldn't be so dramatic to 
implement I think.

Then one would need an additional WCondensedLibrary to display the 
LibraryFeatures without the leftPane but with a dropDown at the top.

Probably I'm not into it as deep as you guys. So don't hesitate to tell 
me I'm wrong ;-)
I just like to understand the difference in your approach to learn from 
it ;-)

Am 05.06.2016 um 14:13 schrieb Daniel Schürmann:
> Hi Markus,
>
> thank you for you second library model.
>
> We have discussed such a model earlier, but it was difficult to
> generalize is in the back-end.
>
> The current model has a nice generalized object model.
> See the exploded drawing on:
> http://www.mixxx.org/wiki/doku.php/library_layout_redesign
>
> For my feeling the switching of the left pane will happen
> "as expected".
> If done right, it will offer the right view for every common use case
> without being cluttered.
> The left pane could always support the DJ best for the specific task.
> Paired with a new drop target, it will IMHO work well.
>
> If you wish to do a mock-up, you may Inkscape and this template:
> https://github.com/jmigual/mixxxDocuments/blob/master/Layout_2.svg
> or any other tool.
>
>
>> Actually from a UX point of view I don't really like the approach to
>> re-use the left pane for all open rightPanes, because users may be
>> confused of it switching around all the time. What about such a solution?:
>>
>> By default have the Button-Bar, the Tree next to it and the TrackTable
>> visible (mainly as it is today, but with the button bar added).
>>
>> A Button in the skin to open an additional RightPane next to it (or
>> anywhere it fits) and there having a kind of drop-down in the header of
>> the new RightPane with which you can select the feature to load.
>> If the pane is empty, you could choose from Library, AutoDJ, Crates,
>> Playlists.
>> If you select Library, you get the usual Track-Table loaded inside the pane.
>> If you select Crates, the list of all crates is loaded to the pane,
>> which can then be used as drop-targets for sorting (see above).
>> Then you can click on one Crate-Name to show the content of the crate in
>> the pane instead. The drop-Down at the top would then show (Library,
>> AutoDJ, Crates, -divider-, [insertAllCratesHere], -divider-, Playlists).
>> So that you can quickly switch between crates and also to other
>> LibraryFeatures. If we could make that drop-down with expandable items
>> and sub items, one could also directly select a crate from the default
>> view, but thats maybe to complicated.
>>
>> Like that one has the fast and easy access to one feature at set-time,
>> but the flexibility to open an other pane if needed to sort tracks.
>> If you have a wide display, you could also open multiple LibraryFeatures
>> next to each other, to have 80th, 90th and MegaHits open for quick
>> access in a set. Maybe you only need the Artist and Track information,
>> than you could fit a massive amount of Crates/Playlists/+AutoDJ next to
>> each other. On a small screen you still have the clean layout we have
>> nowadays.
>>
>> I hope one understands my Idea. If needed I could make drafts of it to
>> make it more clear.
>>
>> Keep up the good work!
>> Markus
>>
>> Am 05.06.2016 um 11:45 schrieb Daniel Schürmann:
>>> Hi Ferran,
>>>
>>> thank you for your ideas.
>>>
>>>>      The second way is the "Copy to Context menu". Unfortunately the
>>>>      menu vanishes after the copy. Conclusion: Not easy.
>>>>
>>>> Why is this "not easy"?
>>>>
>>> This IS easy for a single track, but not for many, lets say new tracks.
>>> I am afraid, this menu becomes unhandy if we have crates hierarchies.
>>> Maybe we can replace it with something cool that fixes the other issue
>>> as well.
>>>
>>>>      How about adding a root node to the Crates and  Playlist Feature
>>>>      that displays the All tracks? That would allow dragging any track
>>>>      to any Crate /Playlist.
>>>>
>>>>
>>>> 1) This doesn't allow users to add tracks from playlist to crates.
>>>>
>>> Yes, a solution would be to combine the crates an playlists feature.
>>> However a separate feature may allows us to add cool new things to the
>>> left pane individual.
>>>
>>>> 2) Maybe the user is looking at the auto-dj queue and thinks "this
>>>> track is totally hot, I should add it to the Hits crate". He can't
>>>> because from the auto-dj pane he can't access the playlist tree. For
>>>> me this is not a solution.
>>>>
>>> The main task for the autodj's left pane is to define the transitions.
>>> The user can already use the context menu or open a second pane, but
>>> this might be not straight forward enough.
>>>
>>>>      once we have a Crate hierarchies, it could be as hard to drop to
>>>>      one from 100 crates. This cam be solved ba a Bookmark feature that
>>>>      contains only a few relevant Crates.
>>>>
>>>>      What do you think? Any other idea?
>>>>
>>>> Keep showing the whole tree of features in every pane: Show the tree
>>>> corresponding to the current pane. Add an additional node, collapsed
>>>> by default that shows the whole tree. Something like this:
>>>>
>>>> -Crate 1
>>>> -Crate 2
>>>> ---Sub Crate 2.1
>>>> -Crate 3
>>>> -Full Tree
>>>> ---...
>>>>
>>>>
>>>> Isn't this a simple but effective solution?
>>>>
>>> IMHO we should careful consider what is the most required contend on the
>>> feature's left pane. Sorting tracks to different crates / playlists is
>>> only one aspect. It should not clutter the left pane one one hand, but
>>> there is a valid demand to have always an easy access to crates and
>>> playlist as drop targets.
>>>
>>> You idea, goes to the right direction.
>>>
>>> Full Tree: I think we do not nee the legacy full tree, we need a tree of
>>> all drop targets, right? The crates and playlist tree should be sufficient.
>>>
>>> A full tree node, on every left pane breaks somehow the ButtoBar +
>>> Fetaure Idea.
>>> How can we combine both?
>>>
>>> How about move this Full Tree node as button to the button bar. This
>>> could be a special feature without a right pane.
>>>
>>> The most difficult case, seams to be the single feature view: ButtonBar
>>> + AutoDJ left pane + AutoDJ track list.
>>> Form this view, the user can drag a track from the AutoDJ track list,
>>> hover to the Full Tree button on the button bar.
>>> this will enable the drop target tree on the left pane keeping the
>>> AutoDJ track list in the right pane.
>>> Now he can sort all tracks as desired.
>>>
>>> @JOAN, will this fit to your Backend model? Will it replace the single
>>> cates and playlist features?
>>> Do we still need to copy to context menu?
>>>
>>>> I want to remark that is quite important to allow users to configure
>>>> the new library to look similar to current one (one single pane +
>>>> complete tree). Feature specific tree + collapsable complete tree
>>>> would also work for me.
>>> I am not sure if I missed a point, why it is required to keep a view
>>> that look similar to current one. Is there an other use case we have
>>> missed?
>>>
>>> Kind regards,
>>>
>>> Daniel
>>>
>>>
>>>
>>>
>>>
>>>
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