How to prevent unlocking the screen

Jacques Hausser jacques.hausser at
Tue Dec 15 05:25:39 EST 2009

Hello everybody,

I want to change the size of a stack:

command changeStackSize
  lock screen
  -- (computes and set the new size)
end changeStackSize

The problem is that notwithstanding the "lock screen" the change is visible in two steps: first the window size, and then the content. I would like to hide the change till completed. How to do ?
Thanks in advance


Prof. Jacques Hausser
Department of Ecology and Evolution
Biophore / Sorge
University of Lausanne
CH 1015 Lausanne
please use my private address:
6 route de Burtigny
CH-1269 Bassins
tel/fax: 	++ 41 22 366 19 40
mobile:	++ 41 79 757 05 24
E-Mail:	jacques.hausser at

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