Eliminate popup windows in Mixxx

[Owen Williams]

(This is all mixxx 2.0 stuff) Popup windows are becoming deprecated, and we should eliminate them whereever we can. This would involve rejiggering:

* preferences window
* rescan window
* track properties window
* about box?

Of these, the preferences and rescan windows are the ones I hate the most, because they cause weird behavior in fullscreen mode and often get hidden behind the main UI.

[Daniel Schürmann (daschuer)]

This can be done like it is done in clementine-player. They have a "taskmanager" class for all library tasks which is connected to a kind of hourglass widget .
All library actions a preformed generally from a special library thread. I think this is also a good idea for Mixxx.

[William Good (bkgood)]

> Popup windows are becoming deprecated

By who? Commercial DJ software still uses them commonly, as does most other software. The only GUI application I can think of that doesn't use a separate preferences window I commonly use is Chrome, which does still use a dialog for 'About'.

> Of these, the preferences and rescan windows are the ones I hate the most, because they cause weird behavior in fullscreen mode and often get hidden behind the main UI.

The rescan dialog is an abuse of the concept of a dialog window, it shouldn't be so obtrusive for an unobtrusive task and therefore needs refactoring. The preferences being hidden behind the UI in fullscreen is a problem but somehow shoving the prefs into the main UI because of this is like demolishing a building for a leaky faucet. Most preferences don't need changed during a live set (or even shouldn't be). If there are ones that are, maybe they shouldn't be preferences and should instead be moved into the main UI individually. Tried-and-true concepts of the GUI shouldn't be thrown out because the flavor of the week is anti-dialog :/

[Swiftb0y (swiftb0y)]

Mixxx now uses GitHub for bug tracking. This bug has been migrated to:
https://github.com/mixxxdj/mixxx/issues/6235