#8974 NORM Not Tri: Rotate screen button is too easy to press if user is speaking to class

[Zarro Boogs per Child]

#8974: Rotate screen button is too easy to press if user is speaking to class
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 Reporter:  ssb22         |                 Owner:               
     Type:  defect        |                Status:  new          
 Priority:  normal        |             Milestone:  Not Triaged  
Component:  not assigned  |               Version:  not specified
 Keywords:                |           Next_action:  never set    
 Verified:  0             |   Deployment_affected:               
Blockedby:                |              Blocking:               
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 I'm running build 767 (firmware Q2E18) on a B4 and I'm legally blind.
 Over the last few months I have been testing this machine in a classroom
 setting, including to display notes to myself when giving presentations.
 I do that in Tablet mode (and I've found it's generally best to put my
 notes into HTML, with the image-reflow tools at
 http://people.pwf.cam.ac.uk/ssb22/notes/ if necessary, and use Opera with
 zoom, but I plan to try the new View Slides activity and a few other
 things in future).

 One problem I have found is, it is too easy to accidentally press the
 Rotate Screen button when holding the B4 in tablet mode while standing.
 This button is very close to where I need to put my left hand, and as I
 can't always see what my hands are doing, I sometimes press it by mistake.
 This causes Opera to take some time to redisplay the document and scroll
 back into position, and, if you don't want the rotation (which you usually
 don't if you want "page down" to be in the same direction as the screen
 itself), you have to press rotate-screen 3 more times and wait longer for
 the software to redisplay again.  When you're presenting to an audience
 this can be very distracting.  Recently I used the OLPC to display my
 notes when interpreting someone else's presentation into Chinese, and
 recovering from an accidental press of the Rotate Screen button gave me a
 notes blackout for the best part of a minute.  I managed to "wing it", but
 if that had been my class presentation at 11 years old I'm not so sure I
 wouldn't have been overcome by the experience.

 It might be useful to add an option to disable the rotate screen button.
 However it could be difficult to ensure those who need it discover it
 without bothering those who don't.  Another approach would be to require
 it to be pressed for a certain amount of time before it registers.

 To disable the "rotate screen" key manually: In a Terminal, type "nano
 /usr/share/sugar/shell/view/keyhandler.py" (without quotes) and press
 Enter.  Press Ctrl-W to search, search for rotate, find the '0xEB' :
 'rotate' mapping in the _actions_table, go to the start of that line,
 comment it out (add #), save (Ctrl-O Enter), and restart the X server
 (alt-ctrl-backspace).

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Ticket URL: <http://dev.laptop.org/ticket/8974>
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