#12228 NORM 4-softw: xo-4: zforce driver change x/y position

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#12228: xo-4: zforce driver change x/y position
-------------------------+--------------------------------------------------
 Reporter:  godiard      |                 Owner:            
     Type:  defect       |                Status:  new       
 Priority:  normal       |             Milestone:  4-software
Component:  touchscreen  |               Version:  4-B1      
 Keywords:               |           Next_action:  diagnose  
 Verified:  0            |   Deployment_affected:            
Blockedby:               |              Blocking:            
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 With the zforce driver, if the user keep the finger without movement
 touching the screen, gtk receives changes in the x/y position of 1 pixel.
 If a activity process every change, as a drawing application, this issue
 can trigger a lot of events.

 In Paint activity we do:

         # the touch driver trigger many events sensing movements up and
 down
         # by only a pixel. This code caches the last position and ignores
         # the movement if is not bigger than one pixel to avoid redraws
         if abs(x - self._last_x_touch) > 1 or \
             abs(y > self._last_y_touch) > 1:
             self._last_x_touch = x
             self._last_y_touch = y
         else:
             return

 Should be good if this can be solved in the driver

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Ticket URL: <http://dev.laptop.org/ticket/12228>
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