[Bugs] #428 UNSP: connect('map') to activity widow not to current canvas

[SugarLabs Bugs]

#428: connect('map') to activity widow not to current canvas
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    Reporter:  alsroot                    |          Owner:  marcopg    
        Type:  defect                     |         Status:  new        
    Priority:  Unspecified by Maintainer  |      Milestone:  0.84       
   Component:  sugar-toolkit              |        Version:  0.83.x     
    Severity:  Unspecified                |     Resolution:             
    Keywords:  r?                         |   Distribution:  Unspecified
Status_field:  Unconfimed                 |  
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Comment(by tomeu):

 If I remember correctly, read_file is called in the canvas map handler
 because Write could set the file to load before abiwidget was mapped.

 This patch would break it because the main window is mapped before its
 children, though maybe abiwidget has been fixed since.

 Anyway, I think that the idea is to call read_file after the activity has
 been set up, but before anything has drawn on the screen. Other
 suggestions?

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Ticket URL: <http://dev.sugarlabs.org/ticket/428#comment:7>
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