Bugs item #3531758, was opened at 2012-06-03 15:58
Message generated for change (Tracker Item Submitted) made by alex4nder
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Category: GUI - AXIS
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Alexander Guy (alex4nder)
Assigned to: Chris Radek (cradek)
Summary: Uncontrolled continuous Z-axis jog with pull-down open.

Initial Comment:
When the 'jog increment' drop-down is in focus, page-up and page-down key 
releases aren't recognized.  This causes a dangerous situation if 'Continuous' 
is the currently selected jog increment, as the Z axis will not stop moving 
after the key is released.  I'm seeing this behavior in master (circa 
0587bea0c54ac).

Reproducing this issue is easy:

1) Start axis (sim or otherwise)
2) Bring the 'machine' online (i.e. disable emergency, turn on power).
3) The 'jog increment' should by default be "Continuous", but if it isn't, 
select "Continuous".
3) Click the 'jog increment' drop-down once, and leave the drop-down open (note 
the fact that the drop-down is in focus).
4) Press page-down or page-up

You should see the Z axis keeps moving, even after you let go of the key.  This 
has been reproduced with standard keyboard input, but and has been shown to 
happen with other input devices (e.g. joysticks generating key-presses).



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