[Bugs] #3709 Jukebox UNSP: Jukebox should safely ignore when referenced media is not found

[Sugar Labs Bugs]

#3709: Jukebox should safely ignore when referenced media is not found
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    Reporter:  manuq                      |          Owner:  godiard                  
        Type:  defect                     |         Status:  assigned                 
    Priority:  Unspecified by Maintainer  |      Milestone:  0.98                     
   Component:  Jukebox                    |        Version:  Unspecified              
    Severity:  Unspecified                |       Keywords:  patch, screenshot, design
Distribution:  Unspecified                |   Status_field:  Unconfirmed              
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Comment(by garycmartin):

 Replying to [comment:14 manuq]:
 > Discussing with Gonzalo we came to this.  Gary, what do you think?:
 >
 >  1. a message is shown at the start "N tracks not found" with a
 "Details" button

 Yes, that's nice and clear.

 >  2. the Details button displays a list of paths that were not found

 OK, yes this is one way – we need to make sure this list display is
 reasonably set out on the canvas (line wrapped, some padding around the
 edge of the screen, allow the list area to scroll if there are many
 missing tracks etc).

 One alternative that might be simpler, for each greyed out track add a
 small error (!) icon badge, hovering/clicking on the badge reveals a
 palette with the full missing path.

 >  3. the rows of the tracks that were not found are grayed out
 >
 > As the list of paths can't fit in the Sugar Alert, they can be displayed
 in the canvas.  Jukebox is also displaying another message there
 attachment:Screenshot%20of%20_Jukebox%20Activity_.png:ticket:1548

 Oh wow, yes that one is rather ugly! ;) Can we clean that one up? Centre
 the message, plenty of padding either side of the text, line wrap if
 necessary, remove the technical jargon/code, perhaps put an error icon
 above the text. A design much like the other message designs as in #3714
 http://bugs.sugarlabs.org/attachment/ticket/3714/Jukebox_playlist_informational_only.png

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Ticket URL: <http://bugs.sugarlabs.org/ticket/3709#comment:18>
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