[Bugs] #2545 UNSP: colour, shade, grey, turtle sees

[Sugar Labs Bugs]

#2545: colour, shade, grey, turtle sees
------------------------------------------+---------------------------------
    Reporter:  tonyforster                |          Owner:  walter                     
        Type:  defect                     |         Status:  new                        
    Priority:  Unspecified by Maintainer  |      Milestone:  Unspecified by Release Team
   Component:  Turtleart                  |        Version:  Unspecified                
    Severity:  Unspecified                |       Keywords:                             
Status_field:  Unconfirmed                |   Distribution:  Unspecified                
   Seeta_dev:                             |  
------------------------------------------+---------------------------------
 messing with turtle sees, the mouse would not release the turtle, log
 shows /0 error

 Also, turtle sees is affected by the shade setting, even though what it is
 seeing was done at default shade.

 Traceback (most recent call last):
   File "/home/olpc/Activities/TurtleArt.activity/TurtleArt/tawindow.py",
 line 1494, in _buttonrelease_cb
     self.button_release(x, y)
   File "/home/olpc/Activities/TurtleArt.activity/TurtleArt/tawindow.py",
 line 1518, in button_release
     self.active_turtle.spr.rect.height / 2)
   File "/home/olpc/Activities/TurtleArt.activity/TurtleArt/tawindow.py",
 line 1571, in _move_turtle
     self.lc.see()
   File "/home/olpc/Activities/TurtleArt.activity/TurtleArt/talogo.py",
 line 1455, in see
     color_index = self.tw.canvas.get_color_index(r, g, b)
   File "/home/olpc/Activities/TurtleArt.activity/TurtleArt/tacanvas.py",
 line 596, in get_color_index
     r = calc_gray(r, self.gray, True)
   File "/home/olpc/Activities/TurtleArt.activity/TurtleArt/tacanvas.py",
 line 64, in calc_gray
     return int(((c * 100) - (32768 * (100 - g))) / g)
 ZeroDivisionError: float division

-- 
Ticket URL: <http://bugs.sugarlabs.org/ticket/2545>
Sugar Labs <http://sugarlabs.org/>
Sugar Labs bug tracking system