#2713 HIGH Trial-3: Add paging arrows to the activities frame

[Zarro Boogs per Child]

#2713: Add paging arrows to the activities frame
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  Reporter:  tomeu             |       Owner:  marco  
      Type:  defect            |      Status:  new    
  Priority:  high              |   Milestone:  Trial-3
 Component:  interface-design  |     Version:         
Resolution:                    |    Keywords:  review-
  Verified:  0                 |  
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Changes (by Eben):

  * owner:  Eben => marco

Comment:

 It might make sense to extend the toolbar.  We have thoughts that trays
 may support tabs in the future (though the tabs would appear above, not
 below).  Trays, in general, will simply be object trays.  That is, they
 will function just like most edges of the frame, holding a number of icons
 each representing an object and having an anchored rollover with various
 options that could be specifically designated by the activity, with one of
 those options being "Remove."

 The biggest difference between a toolbar and a tray is that each tray can
 be associated with a list of mime types which it supports.  Drag'n'drop
 and other operations will only be available for these advertised mime
 types.  Activities should have a very simple API for adding and removing
 things to and from the tray.  The API should include one boolean for
 allowing drag'n'drop and a second for allowing re-ordering of objects
 within the tray.

 At first glance, I'd suspect that all trays are really "object trays".

 As far as scaling goes, I'm really not sure what all the use cases will
 be.  I'd suspect that trays with 60 or so objects might be expected (5
 pages).  Less is obviously not a problem; more might be.  We've also been
 considering the possibility of allowing trays to collapse (hide at the
 edge of the screen), and also the possibility of allowing them to be
 dragged out like drawers, revealing several rows of objects at once.  I'd
 place much higher bets on the former than the latter.

 Unfortunately I haven't had the chance to see how the control is working
 at the moment.  This hotel blocks youtube content, so I couldn't view the
 video Eduardo sent me.  Marco, do you have specific concerns or questions
 with how it works at present?

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Ticket URL: <http://dev.laptop.org/ticket/2713#comment:5>
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